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(); 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 vs->features |= VNC_FEATURE_HEXTILE_MASK; 2148 vs->vnc_encoding = enc; 2149 break; 2150 case VNC_ENCODING_TIGHT: 2151 vs->features |= VNC_FEATURE_TIGHT_MASK; 2152 vs->vnc_encoding = enc; 2153 break; 2154 #ifdef CONFIG_PNG 2155 case VNC_ENCODING_TIGHT_PNG: 2156 vs->features |= VNC_FEATURE_TIGHT_PNG_MASK; 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 ((vs->features & VNC_FEATURE_ZRLE_MASK) == 0) { 2167 vs->features |= VNC_FEATURE_ZLIB_MASK; 2168 vs->vnc_encoding = enc; 2169 } 2170 break; 2171 case VNC_ENCODING_ZRLE: 2172 vs->features |= VNC_FEATURE_ZRLE_MASK; 2173 vs->vnc_encoding = enc; 2174 break; 2175 case VNC_ENCODING_ZYWRLE: 2176 vs->features |= VNC_FEATURE_ZYWRLE_MASK; 2177 vs->vnc_encoding = enc; 2178 break; 2179 case VNC_ENCODING_DESKTOPRESIZE: 2180 vs->features |= VNC_FEATURE_RESIZE_MASK; 2181 break; 2182 case VNC_ENCODING_DESKTOP_RESIZE_EXT: 2183 vs->features |= VNC_FEATURE_RESIZE_EXT_MASK; 2184 break; 2185 case VNC_ENCODING_POINTER_TYPE_CHANGE: 2186 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK; 2187 break; 2188 case VNC_ENCODING_RICH_CURSOR: 2189 vs->features |= VNC_FEATURE_RICH_CURSOR_MASK; 2190 break; 2191 case VNC_ENCODING_ALPHA_CURSOR: 2192 vs->features |= VNC_FEATURE_ALPHA_CURSOR_MASK; 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 vs->features |= VNC_FEATURE_AUDIO_MASK; 2200 send_ext_audio_ack(vs); 2201 } 2202 break; 2203 case VNC_ENCODING_WMVi: 2204 vs->features |= VNC_FEATURE_WMVI_MASK; 2205 break; 2206 case VNC_ENCODING_LED_STATE: 2207 vs->features |= VNC_FEATURE_LED_STATE_MASK; 2208 break; 2209 case VNC_ENCODING_XVP: 2210 if (vs->vd->power_control) { 2211 vs->features |= VNC_FEATURE_XVP_MASK; 2212 send_xvp_message(vs, VNC_XVP_CODE_INIT); 2213 } 2214 break; 2215 case VNC_ENCODING_CLIPBOARD_EXT: 2216 vs->features |= VNC_FEATURE_CLIPBOARD_EXT_MASK; 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 (dlen < 4) { 2449 error_report("vnc: malformed payload (header less than 4 bytes)" 2450 " in extended clipboard pseudo-encoding."); 2451 vnc_client_error(vs); 2452 break; 2453 } 2454 vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12); 2455 break; 2456 } 2457 vnc_client_cut_text(vs, read_u32(data, 4), data + 8); 2458 break; 2459 case VNC_MSG_CLIENT_XVP: 2460 if (!vnc_has_feature(vs, VNC_FEATURE_XVP)) { 2461 error_report("vnc: xvp client message while disabled"); 2462 vnc_client_error(vs); 2463 break; 2464 } 2465 if (len == 1) { 2466 return 4; 2467 } 2468 if (len == 4) { 2469 uint8_t version = read_u8(data, 2); 2470 uint8_t action = read_u8(data, 3); 2471 2472 if (version != 1) { 2473 error_report("vnc: xvp client message version %d != 1", 2474 version); 2475 vnc_client_error(vs); 2476 break; 2477 } 2478 2479 switch (action) { 2480 case VNC_XVP_ACTION_SHUTDOWN: 2481 qemu_system_powerdown_request(); 2482 break; 2483 case VNC_XVP_ACTION_REBOOT: 2484 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2485 break; 2486 case VNC_XVP_ACTION_RESET: 2487 qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET); 2488 break; 2489 default: 2490 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2491 break; 2492 } 2493 } 2494 break; 2495 case VNC_MSG_CLIENT_QEMU: 2496 if (len == 1) 2497 return 2; 2498 2499 switch (read_u8(data, 1)) { 2500 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: 2501 if (len == 2) 2502 return 12; 2503 2504 ext_key_event(vs, read_u16(data, 2), 2505 read_u32(data, 4), read_u32(data, 8)); 2506 break; 2507 case VNC_MSG_CLIENT_QEMU_AUDIO: 2508 if (!vnc_has_feature(vs, VNC_FEATURE_AUDIO)) { 2509 error_report("Audio message %d with audio disabled", read_u8(data, 2)); 2510 vnc_client_error(vs); 2511 break; 2512 } 2513 2514 if (len == 2) 2515 return 4; 2516 2517 switch (read_u16 (data, 2)) { 2518 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: 2519 trace_vnc_msg_client_audio_enable(vs, vs->ioc); 2520 audio_add(vs); 2521 break; 2522 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: 2523 trace_vnc_msg_client_audio_disable(vs, vs->ioc); 2524 audio_del(vs); 2525 break; 2526 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: 2527 if (len == 4) 2528 return 10; 2529 switch (read_u8(data, 4)) { 2530 case 0: vs->as.fmt = AUDIO_FORMAT_U8; break; 2531 case 1: vs->as.fmt = AUDIO_FORMAT_S8; break; 2532 case 2: vs->as.fmt = AUDIO_FORMAT_U16; break; 2533 case 3: vs->as.fmt = AUDIO_FORMAT_S16; break; 2534 case 4: vs->as.fmt = AUDIO_FORMAT_U32; break; 2535 case 5: vs->as.fmt = AUDIO_FORMAT_S32; break; 2536 default: 2537 VNC_DEBUG("Invalid audio format %d\n", read_u8(data, 4)); 2538 vnc_client_error(vs); 2539 break; 2540 } 2541 vs->as.nchannels = read_u8(data, 5); 2542 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { 2543 VNC_DEBUG("Invalid audio channel count %d\n", 2544 read_u8(data, 5)); 2545 vnc_client_error(vs); 2546 break; 2547 } 2548 freq = read_u32(data, 6); 2549 /* No official limit for protocol, but 48khz is a sensible 2550 * upper bound for trustworthy clients, and this limit 2551 * protects calculations involving 'vs->as.freq' later. 2552 */ 2553 if (freq > 48000) { 2554 VNC_DEBUG("Invalid audio frequency %u > 48000", freq); 2555 vnc_client_error(vs); 2556 break; 2557 } 2558 vs->as.freq = freq; 2559 trace_vnc_msg_client_audio_format( 2560 vs, vs->ioc, vs->as.fmt, vs->as.nchannels, vs->as.freq); 2561 break; 2562 default: 2563 VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 2)); 2564 vnc_client_error(vs); 2565 break; 2566 } 2567 break; 2568 2569 default: 2570 VNC_DEBUG("Msg: %d\n", read_u16(data, 0)); 2571 vnc_client_error(vs); 2572 break; 2573 } 2574 break; 2575 case VNC_MSG_CLIENT_SET_DESKTOP_SIZE: 2576 { 2577 size_t size; 2578 uint8_t screens; 2579 int w, h; 2580 2581 if (len < 8) { 2582 return 8; 2583 } 2584 2585 screens = read_u8(data, 6); 2586 size = 8 + screens * 16; 2587 if (len < size) { 2588 return size; 2589 } 2590 w = read_u16(data, 2); 2591 h = read_u16(data, 4); 2592 2593 trace_vnc_msg_client_set_desktop_size(vs, vs->ioc, w, h, screens); 2594 if (dpy_ui_info_supported(vs->vd->dcl.con)) { 2595 QemuUIInfo info; 2596 memset(&info, 0, sizeof(info)); 2597 info.width = w; 2598 info.height = h; 2599 dpy_set_ui_info(vs->vd->dcl.con, &info, false); 2600 vnc_desktop_resize_ext(vs, 4 /* Request forwarded */); 2601 } else { 2602 vnc_desktop_resize_ext(vs, 3 /* Invalid screen layout */); 2603 } 2604 2605 break; 2606 } 2607 default: 2608 VNC_DEBUG("Msg: %d\n", data[0]); 2609 vnc_client_error(vs); 2610 break; 2611 } 2612 2613 vnc_update_throttle_offset(vs); 2614 vnc_read_when(vs, protocol_client_msg, 1); 2615 return 0; 2616 } 2617 2618 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) 2619 { 2620 char buf[1024]; 2621 VncShareMode mode; 2622 int size; 2623 2624 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE; 2625 switch (vs->vd->share_policy) { 2626 case VNC_SHARE_POLICY_IGNORE: 2627 /* 2628 * Ignore the shared flag. Nothing to do here. 2629 * 2630 * Doesn't conform to the rfb spec but is traditional qemu 2631 * behavior, thus left here as option for compatibility 2632 * reasons. 2633 */ 2634 break; 2635 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE: 2636 /* 2637 * Policy: Allow clients ask for exclusive access. 2638 * 2639 * Implementation: When a client asks for exclusive access, 2640 * disconnect all others. Shared connects are allowed as long 2641 * as no exclusive connection exists. 2642 * 2643 * This is how the rfb spec suggests to handle the shared flag. 2644 */ 2645 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2646 VncState *client; 2647 QTAILQ_FOREACH(client, &vs->vd->clients, next) { 2648 if (vs == client) { 2649 continue; 2650 } 2651 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE && 2652 client->share_mode != VNC_SHARE_MODE_SHARED) { 2653 continue; 2654 } 2655 vnc_disconnect_start(client); 2656 } 2657 } 2658 if (mode == VNC_SHARE_MODE_SHARED) { 2659 if (vs->vd->num_exclusive > 0) { 2660 vnc_disconnect_start(vs); 2661 return 0; 2662 } 2663 } 2664 break; 2665 case VNC_SHARE_POLICY_FORCE_SHARED: 2666 /* 2667 * Policy: Shared connects only. 2668 * Implementation: Disallow clients asking for exclusive access. 2669 * 2670 * Useful for shared desktop sessions where you don't want 2671 * someone forgetting to say -shared when running the vnc 2672 * client disconnect everybody else. 2673 */ 2674 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2675 vnc_disconnect_start(vs); 2676 return 0; 2677 } 2678 break; 2679 } 2680 vnc_set_share_mode(vs, mode); 2681 2682 if (vs->vd->num_shared > vs->vd->connections_limit) { 2683 vnc_disconnect_start(vs); 2684 return 0; 2685 } 2686 2687 assert(pixman_image_get_width(vs->vd->server) < 65536 && 2688 pixman_image_get_width(vs->vd->server) >= 0); 2689 assert(pixman_image_get_height(vs->vd->server) < 65536 && 2690 pixman_image_get_height(vs->vd->server) >= 0); 2691 vs->client_width = pixman_image_get_width(vs->vd->server); 2692 vs->client_height = pixman_image_get_height(vs->vd->server); 2693 vnc_write_u16(vs, vs->client_width); 2694 vnc_write_u16(vs, vs->client_height); 2695 2696 pixel_format_message(vs); 2697 2698 if (qemu_name) { 2699 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); 2700 if (size > sizeof(buf)) { 2701 size = sizeof(buf); 2702 } 2703 } else { 2704 size = snprintf(buf, sizeof(buf), "QEMU"); 2705 } 2706 2707 vnc_write_u32(vs, size); 2708 vnc_write(vs, buf, size); 2709 vnc_flush(vs); 2710 2711 vnc_client_cache_auth(vs); 2712 vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); 2713 2714 vnc_read_when(vs, protocol_client_msg, 1); 2715 2716 return 0; 2717 } 2718 2719 void start_client_init(VncState *vs) 2720 { 2721 vnc_read_when(vs, protocol_client_init, 1); 2722 } 2723 2724 static void authentication_failed(VncState *vs) 2725 { 2726 vnc_write_u32(vs, 1); /* Reject auth */ 2727 if (vs->minor >= 8) { 2728 static const char err[] = "Authentication failed"; 2729 vnc_write_u32(vs, sizeof(err)); 2730 vnc_write(vs, err, sizeof(err)); 2731 } 2732 vnc_flush(vs); 2733 vnc_client_error(vs); 2734 } 2735 2736 static void 2737 vnc_munge_des_rfb_key(unsigned char *key, size_t nkey) 2738 { 2739 size_t i; 2740 for (i = 0; i < nkey; i++) { 2741 uint8_t r = key[i]; 2742 r = (r & 0xf0) >> 4 | (r & 0x0f) << 4; 2743 r = (r & 0xcc) >> 2 | (r & 0x33) << 2; 2744 r = (r & 0xaa) >> 1 | (r & 0x55) << 1; 2745 key[i] = r; 2746 } 2747 } 2748 2749 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) 2750 { 2751 unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; 2752 size_t i, pwlen; 2753 unsigned char key[8]; 2754 time_t now = time(NULL); 2755 QCryptoCipher *cipher = NULL; 2756 Error *err = NULL; 2757 2758 if (!vs->vd->password) { 2759 trace_vnc_auth_fail(vs, vs->auth, "password is not set", ""); 2760 goto reject; 2761 } 2762 if (vs->vd->expires < now) { 2763 trace_vnc_auth_fail(vs, vs->auth, "password is expired", ""); 2764 goto reject; 2765 } 2766 2767 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); 2768 2769 /* Calculate the expected challenge response */ 2770 pwlen = strlen(vs->vd->password); 2771 for (i=0; i<sizeof(key); i++) 2772 key[i] = i<pwlen ? vs->vd->password[i] : 0; 2773 vnc_munge_des_rfb_key(key, sizeof(key)); 2774 2775 cipher = qcrypto_cipher_new( 2776 QCRYPTO_CIPHER_ALG_DES, 2777 QCRYPTO_CIPHER_MODE_ECB, 2778 key, G_N_ELEMENTS(key), 2779 &err); 2780 if (!cipher) { 2781 trace_vnc_auth_fail(vs, vs->auth, "cannot create cipher", 2782 error_get_pretty(err)); 2783 error_free(err); 2784 goto reject; 2785 } 2786 2787 if (qcrypto_cipher_encrypt(cipher, 2788 vs->challenge, 2789 response, 2790 VNC_AUTH_CHALLENGE_SIZE, 2791 &err) < 0) { 2792 trace_vnc_auth_fail(vs, vs->auth, "cannot encrypt challenge response", 2793 error_get_pretty(err)); 2794 error_free(err); 2795 goto reject; 2796 } 2797 2798 /* Compare expected vs actual challenge response */ 2799 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { 2800 trace_vnc_auth_fail(vs, vs->auth, "mis-matched challenge response", ""); 2801 goto reject; 2802 } else { 2803 trace_vnc_auth_pass(vs, vs->auth); 2804 vnc_write_u32(vs, 0); /* Accept auth */ 2805 vnc_flush(vs); 2806 2807 start_client_init(vs); 2808 } 2809 2810 qcrypto_cipher_free(cipher); 2811 return 0; 2812 2813 reject: 2814 authentication_failed(vs); 2815 qcrypto_cipher_free(cipher); 2816 return 0; 2817 } 2818 2819 void start_auth_vnc(VncState *vs) 2820 { 2821 Error *err = NULL; 2822 2823 if (qcrypto_random_bytes(vs->challenge, sizeof(vs->challenge), &err)) { 2824 trace_vnc_auth_fail(vs, vs->auth, "cannot get random bytes", 2825 error_get_pretty(err)); 2826 error_free(err); 2827 authentication_failed(vs); 2828 return; 2829 } 2830 2831 /* Send client a 'random' challenge */ 2832 vnc_write(vs, vs->challenge, sizeof(vs->challenge)); 2833 vnc_flush(vs); 2834 2835 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); 2836 } 2837 2838 2839 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) 2840 { 2841 /* We only advertise 1 auth scheme at a time, so client 2842 * must pick the one we sent. Verify this */ 2843 if (data[0] != vs->auth) { /* Reject auth */ 2844 trace_vnc_auth_reject(vs, vs->auth, (int)data[0]); 2845 authentication_failed(vs); 2846 } else { /* Accept requested auth */ 2847 trace_vnc_auth_start(vs, vs->auth); 2848 switch (vs->auth) { 2849 case VNC_AUTH_NONE: 2850 if (vs->minor >= 8) { 2851 vnc_write_u32(vs, 0); /* Accept auth completion */ 2852 vnc_flush(vs); 2853 } 2854 trace_vnc_auth_pass(vs, vs->auth); 2855 start_client_init(vs); 2856 break; 2857 2858 case VNC_AUTH_VNC: 2859 start_auth_vnc(vs); 2860 break; 2861 2862 case VNC_AUTH_VENCRYPT: 2863 start_auth_vencrypt(vs); 2864 break; 2865 2866 #ifdef CONFIG_VNC_SASL 2867 case VNC_AUTH_SASL: 2868 start_auth_sasl(vs); 2869 break; 2870 #endif /* CONFIG_VNC_SASL */ 2871 2872 default: /* Should not be possible, but just in case */ 2873 trace_vnc_auth_fail(vs, vs->auth, "Unhandled auth method", ""); 2874 authentication_failed(vs); 2875 } 2876 } 2877 return 0; 2878 } 2879 2880 static int protocol_version(VncState *vs, uint8_t *version, size_t len) 2881 { 2882 char local[13]; 2883 2884 memcpy(local, version, 12); 2885 local[12] = 0; 2886 2887 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { 2888 VNC_DEBUG("Malformed protocol version %s\n", local); 2889 vnc_client_error(vs); 2890 return 0; 2891 } 2892 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); 2893 if (vs->major != 3 || 2894 (vs->minor != 3 && 2895 vs->minor != 4 && 2896 vs->minor != 5 && 2897 vs->minor != 7 && 2898 vs->minor != 8)) { 2899 VNC_DEBUG("Unsupported client version\n"); 2900 vnc_write_u32(vs, VNC_AUTH_INVALID); 2901 vnc_flush(vs); 2902 vnc_client_error(vs); 2903 return 0; 2904 } 2905 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated 2906 * as equivalent to v3.3 by servers 2907 */ 2908 if (vs->minor == 4 || vs->minor == 5) 2909 vs->minor = 3; 2910 2911 if (vs->minor == 3) { 2912 trace_vnc_auth_start(vs, vs->auth); 2913 if (vs->auth == VNC_AUTH_NONE) { 2914 vnc_write_u32(vs, vs->auth); 2915 vnc_flush(vs); 2916 trace_vnc_auth_pass(vs, vs->auth); 2917 start_client_init(vs); 2918 } else if (vs->auth == VNC_AUTH_VNC) { 2919 VNC_DEBUG("Tell client VNC auth\n"); 2920 vnc_write_u32(vs, vs->auth); 2921 vnc_flush(vs); 2922 start_auth_vnc(vs); 2923 } else { 2924 trace_vnc_auth_fail(vs, vs->auth, 2925 "Unsupported auth method for v3.3", ""); 2926 vnc_write_u32(vs, VNC_AUTH_INVALID); 2927 vnc_flush(vs); 2928 vnc_client_error(vs); 2929 } 2930 } else { 2931 vnc_write_u8(vs, 1); /* num auth */ 2932 vnc_write_u8(vs, vs->auth); 2933 vnc_read_when(vs, protocol_client_auth, 1); 2934 vnc_flush(vs); 2935 } 2936 2937 return 0; 2938 } 2939 2940 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) 2941 { 2942 struct VncSurface *vs = &vd->guest; 2943 2944 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; 2945 } 2946 2947 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) 2948 { 2949 int i, j; 2950 2951 w = (x + w) / VNC_STAT_RECT; 2952 h = (y + h) / VNC_STAT_RECT; 2953 x /= VNC_STAT_RECT; 2954 y /= VNC_STAT_RECT; 2955 2956 for (j = y; j <= h; j++) { 2957 for (i = x; i <= w; i++) { 2958 vs->lossy_rect[j][i] = 1; 2959 } 2960 } 2961 } 2962 2963 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) 2964 { 2965 VncState *vs; 2966 int sty = y / VNC_STAT_RECT; 2967 int stx = x / VNC_STAT_RECT; 2968 int has_dirty = 0; 2969 2970 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 2971 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 2972 2973 QTAILQ_FOREACH(vs, &vd->clients, next) { 2974 int j; 2975 2976 /* kernel send buffers are full -> refresh later */ 2977 if (vs->output.offset) { 2978 continue; 2979 } 2980 2981 if (!vs->lossy_rect[sty][stx]) { 2982 continue; 2983 } 2984 2985 vs->lossy_rect[sty][stx] = 0; 2986 for (j = 0; j < VNC_STAT_RECT; ++j) { 2987 bitmap_set(vs->dirty[y + j], 2988 x / VNC_DIRTY_PIXELS_PER_BIT, 2989 VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT); 2990 } 2991 has_dirty++; 2992 } 2993 2994 return has_dirty; 2995 } 2996 2997 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) 2998 { 2999 int width = MIN(pixman_image_get_width(vd->guest.fb), 3000 pixman_image_get_width(vd->server)); 3001 int height = MIN(pixman_image_get_height(vd->guest.fb), 3002 pixman_image_get_height(vd->server)); 3003 int x, y; 3004 struct timeval res; 3005 int has_dirty = 0; 3006 3007 for (y = 0; y < height; y += VNC_STAT_RECT) { 3008 for (x = 0; x < width; x += VNC_STAT_RECT) { 3009 VncRectStat *rect = vnc_stat_rect(vd, x, y); 3010 3011 rect->updated = false; 3012 } 3013 } 3014 3015 qemu_timersub(tv, &VNC_REFRESH_STATS, &res); 3016 3017 if (timercmp(&vd->guest.last_freq_check, &res, >)) { 3018 return has_dirty; 3019 } 3020 vd->guest.last_freq_check = *tv; 3021 3022 for (y = 0; y < height; y += VNC_STAT_RECT) { 3023 for (x = 0; x < width; x += VNC_STAT_RECT) { 3024 VncRectStat *rect= vnc_stat_rect(vd, x, y); 3025 int count = ARRAY_SIZE(rect->times); 3026 struct timeval min, max; 3027 3028 if (!timerisset(&rect->times[count - 1])) { 3029 continue ; 3030 } 3031 3032 max = rect->times[(rect->idx + count - 1) % count]; 3033 qemu_timersub(tv, &max, &res); 3034 3035 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { 3036 rect->freq = 0; 3037 has_dirty += vnc_refresh_lossy_rect(vd, x, y); 3038 memset(rect->times, 0, sizeof (rect->times)); 3039 continue ; 3040 } 3041 3042 min = rect->times[rect->idx]; 3043 max = rect->times[(rect->idx + count - 1) % count]; 3044 qemu_timersub(&max, &min, &res); 3045 3046 rect->freq = res.tv_sec + res.tv_usec / 1000000.; 3047 rect->freq /= count; 3048 rect->freq = 1. / rect->freq; 3049 } 3050 } 3051 return has_dirty; 3052 } 3053 3054 double vnc_update_freq(VncState *vs, int x, int y, int w, int h) 3055 { 3056 int i, j; 3057 double total = 0; 3058 int num = 0; 3059 3060 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 3061 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 3062 3063 for (j = y; j <= y + h; j += VNC_STAT_RECT) { 3064 for (i = x; i <= x + w; i += VNC_STAT_RECT) { 3065 total += vnc_stat_rect(vs->vd, i, j)->freq; 3066 num++; 3067 } 3068 } 3069 3070 if (num) { 3071 return total / num; 3072 } else { 3073 return 0; 3074 } 3075 } 3076 3077 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) 3078 { 3079 VncRectStat *rect; 3080 3081 rect = vnc_stat_rect(vd, x, y); 3082 if (rect->updated) { 3083 return; 3084 } 3085 rect->times[rect->idx] = *tv; 3086 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); 3087 rect->updated = true; 3088 } 3089 3090 static int vnc_refresh_server_surface(VncDisplay *vd) 3091 { 3092 int width = MIN(pixman_image_get_width(vd->guest.fb), 3093 pixman_image_get_width(vd->server)); 3094 int height = MIN(pixman_image_get_height(vd->guest.fb), 3095 pixman_image_get_height(vd->server)); 3096 int cmp_bytes, server_stride, line_bytes, guest_ll, guest_stride, y = 0; 3097 uint8_t *guest_row0 = NULL, *server_row0; 3098 VncState *vs; 3099 int has_dirty = 0; 3100 pixman_image_t *tmpbuf = NULL; 3101 unsigned long offset; 3102 int x; 3103 uint8_t *guest_ptr, *server_ptr; 3104 3105 struct timeval tv = { 0, 0 }; 3106 3107 if (!vd->non_adaptive) { 3108 gettimeofday(&tv, NULL); 3109 has_dirty = vnc_update_stats(vd, &tv); 3110 } 3111 3112 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3113 height * VNC_DIRTY_BPL(&vd->guest), 0); 3114 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3115 /* no dirty bits in guest surface */ 3116 return has_dirty; 3117 } 3118 3119 /* 3120 * Walk through the guest dirty map. 3121 * Check and copy modified bits from guest to server surface. 3122 * Update server dirty map. 3123 */ 3124 server_row0 = (uint8_t *)pixman_image_get_data(vd->server); 3125 server_stride = guest_stride = guest_ll = 3126 pixman_image_get_stride(vd->server); 3127 cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES, 3128 server_stride); 3129 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3130 int w = pixman_image_get_width(vd->server); 3131 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, w); 3132 } else { 3133 int guest_bpp = 3134 PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb)); 3135 guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb); 3136 guest_stride = pixman_image_get_stride(vd->guest.fb); 3137 guest_ll = pixman_image_get_width(vd->guest.fb) 3138 * DIV_ROUND_UP(guest_bpp, 8); 3139 } 3140 line_bytes = MIN(server_stride, guest_ll); 3141 3142 for (;;) { 3143 y = offset / VNC_DIRTY_BPL(&vd->guest); 3144 x = offset % VNC_DIRTY_BPL(&vd->guest); 3145 3146 server_ptr = server_row0 + y * server_stride + x * cmp_bytes; 3147 3148 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3149 qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y); 3150 guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf); 3151 } else { 3152 guest_ptr = guest_row0 + y * guest_stride; 3153 } 3154 guest_ptr += x * cmp_bytes; 3155 3156 for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT); 3157 x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { 3158 int _cmp_bytes = cmp_bytes; 3159 if (!test_and_clear_bit(x, vd->guest.dirty[y])) { 3160 continue; 3161 } 3162 if ((x + 1) * cmp_bytes > line_bytes) { 3163 _cmp_bytes = line_bytes - x * cmp_bytes; 3164 } 3165 assert(_cmp_bytes >= 0); 3166 if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) { 3167 continue; 3168 } 3169 memcpy(server_ptr, guest_ptr, _cmp_bytes); 3170 if (!vd->non_adaptive) { 3171 vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT, 3172 y, &tv); 3173 } 3174 QTAILQ_FOREACH(vs, &vd->clients, next) { 3175 set_bit(x, vs->dirty[y]); 3176 } 3177 has_dirty++; 3178 } 3179 3180 y++; 3181 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3182 height * VNC_DIRTY_BPL(&vd->guest), 3183 y * VNC_DIRTY_BPL(&vd->guest)); 3184 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3185 /* no more dirty bits */ 3186 break; 3187 } 3188 } 3189 qemu_pixman_image_unref(tmpbuf); 3190 return has_dirty; 3191 } 3192 3193 static void vnc_refresh(DisplayChangeListener *dcl) 3194 { 3195 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 3196 VncState *vs, *vn; 3197 int has_dirty, rects = 0; 3198 3199 if (QTAILQ_EMPTY(&vd->clients)) { 3200 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX); 3201 return; 3202 } 3203 3204 graphic_hw_update(vd->dcl.con); 3205 3206 if (vnc_trylock_display(vd)) { 3207 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3208 return; 3209 } 3210 3211 has_dirty = vnc_refresh_server_surface(vd); 3212 vnc_unlock_display(vd); 3213 3214 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { 3215 rects += vnc_update_client(vs, has_dirty); 3216 /* vs might be free()ed here */ 3217 } 3218 3219 if (has_dirty && rects) { 3220 vd->dcl.update_interval /= 2; 3221 if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) { 3222 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE; 3223 } 3224 } else { 3225 vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC; 3226 if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) { 3227 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX; 3228 } 3229 } 3230 } 3231 3232 static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, 3233 bool skipauth, bool websocket) 3234 { 3235 VncState *vs = g_new0(VncState, 1); 3236 bool first_client = QTAILQ_EMPTY(&vd->clients); 3237 int i; 3238 3239 trace_vnc_client_connect(vs, sioc); 3240 vs->zrle = g_new0(VncZrle, 1); 3241 vs->tight = g_new0(VncTight, 1); 3242 vs->magic = VNC_MAGIC; 3243 vs->sioc = sioc; 3244 object_ref(OBJECT(vs->sioc)); 3245 vs->ioc = QIO_CHANNEL(sioc); 3246 object_ref(OBJECT(vs->ioc)); 3247 vs->vd = vd; 3248 3249 buffer_init(&vs->input, "vnc-input/%p", sioc); 3250 buffer_init(&vs->output, "vnc-output/%p", sioc); 3251 buffer_init(&vs->jobs_buffer, "vnc-jobs_buffer/%p", sioc); 3252 3253 buffer_init(&vs->tight->tight, "vnc-tight/%p", sioc); 3254 buffer_init(&vs->tight->zlib, "vnc-tight-zlib/%p", sioc); 3255 buffer_init(&vs->tight->gradient, "vnc-tight-gradient/%p", sioc); 3256 #ifdef CONFIG_VNC_JPEG 3257 buffer_init(&vs->tight->jpeg, "vnc-tight-jpeg/%p", sioc); 3258 #endif 3259 #ifdef CONFIG_PNG 3260 buffer_init(&vs->tight->png, "vnc-tight-png/%p", sioc); 3261 #endif 3262 buffer_init(&vs->zlib.zlib, "vnc-zlib/%p", sioc); 3263 buffer_init(&vs->zrle->zrle, "vnc-zrle/%p", sioc); 3264 buffer_init(&vs->zrle->fb, "vnc-zrle-fb/%p", sioc); 3265 buffer_init(&vs->zrle->zlib, "vnc-zrle-zlib/%p", sioc); 3266 3267 if (skipauth) { 3268 vs->auth = VNC_AUTH_NONE; 3269 vs->subauth = VNC_AUTH_INVALID; 3270 } else { 3271 if (websocket) { 3272 vs->auth = vd->ws_auth; 3273 vs->subauth = VNC_AUTH_INVALID; 3274 } else { 3275 vs->auth = vd->auth; 3276 vs->subauth = vd->subauth; 3277 } 3278 } 3279 VNC_DEBUG("Client sioc=%p ws=%d auth=%d subauth=%d\n", 3280 sioc, websocket, vs->auth, vs->subauth); 3281 3282 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); 3283 for (i = 0; i < VNC_STAT_ROWS; ++i) { 3284 vs->lossy_rect[i] = g_new0(uint8_t, VNC_STAT_COLS); 3285 } 3286 3287 VNC_DEBUG("New client on socket %p\n", vs->sioc); 3288 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3289 qio_channel_set_blocking(vs->ioc, false, NULL); 3290 if (vs->ioc_tag) { 3291 g_source_remove(vs->ioc_tag); 3292 } 3293 if (websocket) { 3294 vs->websocket = 1; 3295 if (vd->tlscreds) { 3296 vs->ioc_tag = qio_channel_add_watch( 3297 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3298 vncws_tls_handshake_io, vs, NULL); 3299 } else { 3300 vs->ioc_tag = qio_channel_add_watch( 3301 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3302 vncws_handshake_io, vs, NULL); 3303 } 3304 } else { 3305 vs->ioc_tag = qio_channel_add_watch( 3306 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3307 vnc_client_io, vs, NULL); 3308 } 3309 3310 vnc_client_cache_addr(vs); 3311 vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED); 3312 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING); 3313 3314 vs->last_x = -1; 3315 vs->last_y = -1; 3316 3317 vs->as.freq = 44100; 3318 vs->as.nchannels = 2; 3319 vs->as.fmt = AUDIO_FORMAT_S16; 3320 vs->as.endianness = 0; 3321 3322 qemu_mutex_init(&vs->output_mutex); 3323 vs->bh = qemu_bh_new(vnc_jobs_bh, vs); 3324 3325 QTAILQ_INSERT_TAIL(&vd->clients, vs, next); 3326 if (first_client) { 3327 vnc_update_server_surface(vd); 3328 } 3329 3330 graphic_hw_update(vd->dcl.con); 3331 3332 if (!vs->websocket) { 3333 vnc_start_protocol(vs); 3334 } 3335 3336 if (vd->num_connecting > vd->connections_limit) { 3337 QTAILQ_FOREACH(vs, &vd->clients, next) { 3338 if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { 3339 vnc_disconnect_start(vs); 3340 return; 3341 } 3342 } 3343 } 3344 } 3345 3346 void vnc_start_protocol(VncState *vs) 3347 { 3348 vnc_write(vs, "RFB 003.008\n", 12); 3349 vnc_flush(vs); 3350 vnc_read_when(vs, protocol_version, 12); 3351 3352 vs->mouse_mode_notifier.notify = check_pointer_type_change; 3353 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 3354 } 3355 3356 static void vnc_listen_io(QIONetListener *listener, 3357 QIOChannelSocket *cioc, 3358 void *opaque) 3359 { 3360 VncDisplay *vd = opaque; 3361 bool isWebsock = listener == vd->wslistener; 3362 3363 qio_channel_set_name(QIO_CHANNEL(cioc), 3364 isWebsock ? "vnc-ws-server" : "vnc-server"); 3365 qio_channel_set_delay(QIO_CHANNEL(cioc), false); 3366 vnc_connect(vd, cioc, false, isWebsock); 3367 } 3368 3369 static const DisplayChangeListenerOps dcl_ops = { 3370 .dpy_name = "vnc", 3371 .dpy_refresh = vnc_refresh, 3372 .dpy_gfx_update = vnc_dpy_update, 3373 .dpy_gfx_switch = vnc_dpy_switch, 3374 .dpy_gfx_check_format = qemu_pixman_check_format, 3375 .dpy_mouse_set = vnc_mouse_set, 3376 .dpy_cursor_define = vnc_dpy_cursor_define, 3377 }; 3378 3379 void vnc_display_init(const char *id, Error **errp) 3380 { 3381 VncDisplay *vd; 3382 3383 if (vnc_display_find(id) != NULL) { 3384 return; 3385 } 3386 vd = g_malloc0(sizeof(*vd)); 3387 3388 vd->id = strdup(id); 3389 QTAILQ_INSERT_TAIL(&vnc_displays, vd, next); 3390 3391 QTAILQ_INIT(&vd->clients); 3392 vd->expires = TIME_MAX; 3393 3394 if (keyboard_layout) { 3395 trace_vnc_key_map_init(keyboard_layout); 3396 vd->kbd_layout = init_keyboard_layout(name2keysym, 3397 keyboard_layout, errp); 3398 } else { 3399 vd->kbd_layout = init_keyboard_layout(name2keysym, "en-us", errp); 3400 } 3401 3402 if (!vd->kbd_layout) { 3403 return; 3404 } 3405 3406 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 3407 vd->connections_limit = 32; 3408 3409 qemu_mutex_init(&vd->mutex); 3410 vnc_start_worker_thread(); 3411 3412 vd->dcl.ops = &dcl_ops; 3413 register_displaychangelistener(&vd->dcl); 3414 vd->kbd = qkbd_state_init(vd->dcl.con); 3415 } 3416 3417 3418 static void vnc_display_close(VncDisplay *vd) 3419 { 3420 if (!vd) { 3421 return; 3422 } 3423 vd->is_unix = false; 3424 3425 if (vd->listener) { 3426 qio_net_listener_disconnect(vd->listener); 3427 object_unref(OBJECT(vd->listener)); 3428 } 3429 vd->listener = NULL; 3430 3431 if (vd->wslistener) { 3432 qio_net_listener_disconnect(vd->wslistener); 3433 object_unref(OBJECT(vd->wslistener)); 3434 } 3435 vd->wslistener = NULL; 3436 3437 vd->auth = VNC_AUTH_INVALID; 3438 vd->subauth = VNC_AUTH_INVALID; 3439 if (vd->tlscreds) { 3440 object_unref(OBJECT(vd->tlscreds)); 3441 vd->tlscreds = NULL; 3442 } 3443 if (vd->tlsauthz) { 3444 object_unparent(OBJECT(vd->tlsauthz)); 3445 vd->tlsauthz = NULL; 3446 } 3447 g_free(vd->tlsauthzid); 3448 vd->tlsauthzid = NULL; 3449 if (vd->lock_key_sync) { 3450 qemu_remove_led_event_handler(vd->led); 3451 vd->led = NULL; 3452 } 3453 #ifdef CONFIG_VNC_SASL 3454 if (vd->sasl.authz) { 3455 object_unparent(OBJECT(vd->sasl.authz)); 3456 vd->sasl.authz = NULL; 3457 } 3458 g_free(vd->sasl.authzid); 3459 vd->sasl.authzid = NULL; 3460 #endif 3461 } 3462 3463 int vnc_display_password(const char *id, const char *password) 3464 { 3465 VncDisplay *vd = vnc_display_find(id); 3466 3467 if (!vd) { 3468 return -EINVAL; 3469 } 3470 if (vd->auth == VNC_AUTH_NONE) { 3471 error_printf_unless_qmp("If you want use passwords please enable " 3472 "password auth using '-vnc ${dpy},password'.\n"); 3473 return -EINVAL; 3474 } 3475 3476 g_free(vd->password); 3477 vd->password = g_strdup(password); 3478 3479 return 0; 3480 } 3481 3482 int vnc_display_pw_expire(const char *id, time_t expires) 3483 { 3484 VncDisplay *vd = vnc_display_find(id); 3485 3486 if (!vd) { 3487 return -EINVAL; 3488 } 3489 3490 vd->expires = expires; 3491 return 0; 3492 } 3493 3494 static void vnc_display_print_local_addr(VncDisplay *vd) 3495 { 3496 SocketAddress *addr; 3497 3498 if (!vd->listener || !vd->listener->nsioc) { 3499 return; 3500 } 3501 3502 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], NULL); 3503 if (!addr) { 3504 return; 3505 } 3506 3507 if (addr->type != SOCKET_ADDRESS_TYPE_INET) { 3508 qapi_free_SocketAddress(addr); 3509 return; 3510 } 3511 error_printf_unless_qmp("VNC server running on %s:%s\n", 3512 addr->u.inet.host, 3513 addr->u.inet.port); 3514 qapi_free_SocketAddress(addr); 3515 } 3516 3517 static QemuOptsList qemu_vnc_opts = { 3518 .name = "vnc", 3519 .head = QTAILQ_HEAD_INITIALIZER(qemu_vnc_opts.head), 3520 .implied_opt_name = "vnc", 3521 .desc = { 3522 { 3523 .name = "vnc", 3524 .type = QEMU_OPT_STRING, 3525 },{ 3526 .name = "websocket", 3527 .type = QEMU_OPT_STRING, 3528 },{ 3529 .name = "tls-creds", 3530 .type = QEMU_OPT_STRING, 3531 },{ 3532 .name = "share", 3533 .type = QEMU_OPT_STRING, 3534 },{ 3535 .name = "display", 3536 .type = QEMU_OPT_STRING, 3537 },{ 3538 .name = "head", 3539 .type = QEMU_OPT_NUMBER, 3540 },{ 3541 .name = "connections", 3542 .type = QEMU_OPT_NUMBER, 3543 },{ 3544 .name = "to", 3545 .type = QEMU_OPT_NUMBER, 3546 },{ 3547 .name = "ipv4", 3548 .type = QEMU_OPT_BOOL, 3549 },{ 3550 .name = "ipv6", 3551 .type = QEMU_OPT_BOOL, 3552 },{ 3553 .name = "password", 3554 .type = QEMU_OPT_BOOL, 3555 },{ 3556 .name = "password-secret", 3557 .type = QEMU_OPT_STRING, 3558 },{ 3559 .name = "reverse", 3560 .type = QEMU_OPT_BOOL, 3561 },{ 3562 .name = "lock-key-sync", 3563 .type = QEMU_OPT_BOOL, 3564 },{ 3565 .name = "key-delay-ms", 3566 .type = QEMU_OPT_NUMBER, 3567 },{ 3568 .name = "sasl", 3569 .type = QEMU_OPT_BOOL, 3570 },{ 3571 .name = "tls-authz", 3572 .type = QEMU_OPT_STRING, 3573 },{ 3574 .name = "sasl-authz", 3575 .type = QEMU_OPT_STRING, 3576 },{ 3577 .name = "lossy", 3578 .type = QEMU_OPT_BOOL, 3579 },{ 3580 .name = "non-adaptive", 3581 .type = QEMU_OPT_BOOL, 3582 },{ 3583 .name = "audiodev", 3584 .type = QEMU_OPT_STRING, 3585 },{ 3586 .name = "power-control", 3587 .type = QEMU_OPT_BOOL, 3588 }, 3589 { /* end of list */ } 3590 }, 3591 }; 3592 3593 3594 static int 3595 vnc_display_setup_auth(int *auth, 3596 int *subauth, 3597 QCryptoTLSCreds *tlscreds, 3598 bool password, 3599 bool sasl, 3600 bool websocket, 3601 Error **errp) 3602 { 3603 /* 3604 * We have a choice of 3 authentication options 3605 * 3606 * 1. none 3607 * 2. vnc 3608 * 3. sasl 3609 * 3610 * The channel can be run in 2 modes 3611 * 3612 * 1. clear 3613 * 2. tls 3614 * 3615 * And TLS can use 2 types of credentials 3616 * 3617 * 1. anon 3618 * 2. x509 3619 * 3620 * We thus have 9 possible logical combinations 3621 * 3622 * 1. clear + none 3623 * 2. clear + vnc 3624 * 3. clear + sasl 3625 * 4. tls + anon + none 3626 * 5. tls + anon + vnc 3627 * 6. tls + anon + sasl 3628 * 7. tls + x509 + none 3629 * 8. tls + x509 + vnc 3630 * 9. tls + x509 + sasl 3631 * 3632 * These need to be mapped into the VNC auth schemes 3633 * in an appropriate manner. In regular VNC, all the 3634 * TLS options get mapped into VNC_AUTH_VENCRYPT 3635 * sub-auth types. 3636 * 3637 * In websockets, the https:// protocol already provides 3638 * TLS support, so there is no need to make use of the 3639 * VeNCrypt extension. Furthermore, websockets browser 3640 * clients could not use VeNCrypt even if they wanted to, 3641 * as they cannot control when the TLS handshake takes 3642 * place. Thus there is no option but to rely on https://, 3643 * meaning combinations 4->6 and 7->9 will be mapped to 3644 * VNC auth schemes in the same way as combos 1->3. 3645 * 3646 * Regardless of fact that we have a different mapping to 3647 * VNC auth mechs for plain VNC vs websockets VNC, the end 3648 * result has the same security characteristics. 3649 */ 3650 if (websocket || !tlscreds) { 3651 if (password) { 3652 VNC_DEBUG("Initializing VNC server with password auth\n"); 3653 *auth = VNC_AUTH_VNC; 3654 } else if (sasl) { 3655 VNC_DEBUG("Initializing VNC server with SASL auth\n"); 3656 *auth = VNC_AUTH_SASL; 3657 } else { 3658 VNC_DEBUG("Initializing VNC server with no auth\n"); 3659 *auth = VNC_AUTH_NONE; 3660 } 3661 *subauth = VNC_AUTH_INVALID; 3662 } else { 3663 bool is_x509 = object_dynamic_cast(OBJECT(tlscreds), 3664 TYPE_QCRYPTO_TLS_CREDS_X509) != NULL; 3665 bool is_anon = object_dynamic_cast(OBJECT(tlscreds), 3666 TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL; 3667 3668 if (!is_x509 && !is_anon) { 3669 error_setg(errp, 3670 "Unsupported TLS cred type %s", 3671 object_get_typename(OBJECT(tlscreds))); 3672 return -1; 3673 } 3674 *auth = VNC_AUTH_VENCRYPT; 3675 if (password) { 3676 if (is_x509) { 3677 VNC_DEBUG("Initializing VNC server with x509 password auth\n"); 3678 *subauth = VNC_AUTH_VENCRYPT_X509VNC; 3679 } else { 3680 VNC_DEBUG("Initializing VNC server with TLS password auth\n"); 3681 *subauth = VNC_AUTH_VENCRYPT_TLSVNC; 3682 } 3683 3684 } else if (sasl) { 3685 if (is_x509) { 3686 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); 3687 *subauth = VNC_AUTH_VENCRYPT_X509SASL; 3688 } else { 3689 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); 3690 *subauth = VNC_AUTH_VENCRYPT_TLSSASL; 3691 } 3692 } else { 3693 if (is_x509) { 3694 VNC_DEBUG("Initializing VNC server with x509 no auth\n"); 3695 *subauth = VNC_AUTH_VENCRYPT_X509NONE; 3696 } else { 3697 VNC_DEBUG("Initializing VNC server with TLS no auth\n"); 3698 *subauth = VNC_AUTH_VENCRYPT_TLSNONE; 3699 } 3700 } 3701 } 3702 return 0; 3703 } 3704 3705 3706 static int vnc_display_get_address(const char *addrstr, 3707 bool websocket, 3708 bool reverse, 3709 int displaynum, 3710 int to, 3711 bool has_ipv4, 3712 bool has_ipv6, 3713 bool ipv4, 3714 bool ipv6, 3715 SocketAddress **retaddr, 3716 Error **errp) 3717 { 3718 int ret = -1; 3719 SocketAddress *addr = NULL; 3720 3721 addr = g_new0(SocketAddress, 1); 3722 3723 if (strncmp(addrstr, "unix:", 5) == 0) { 3724 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 3725 addr->u.q_unix.path = g_strdup(addrstr + 5); 3726 3727 if (websocket) { 3728 error_setg(errp, "UNIX sockets not supported with websock"); 3729 goto cleanup; 3730 } 3731 3732 if (to) { 3733 error_setg(errp, "Port range not support with UNIX socket"); 3734 goto cleanup; 3735 } 3736 ret = 0; 3737 } else { 3738 const char *port; 3739 size_t hostlen; 3740 uint64_t baseport = 0; 3741 InetSocketAddress *inet; 3742 3743 port = strrchr(addrstr, ':'); 3744 if (!port) { 3745 if (websocket) { 3746 hostlen = 0; 3747 port = addrstr; 3748 } else { 3749 error_setg(errp, "no vnc port specified"); 3750 goto cleanup; 3751 } 3752 } else { 3753 hostlen = port - addrstr; 3754 port++; 3755 if (*port == '\0') { 3756 error_setg(errp, "vnc port cannot be empty"); 3757 goto cleanup; 3758 } 3759 } 3760 3761 addr->type = SOCKET_ADDRESS_TYPE_INET; 3762 inet = &addr->u.inet; 3763 if (hostlen && addrstr[0] == '[' && addrstr[hostlen - 1] == ']') { 3764 inet->host = g_strndup(addrstr + 1, hostlen - 2); 3765 } else { 3766 inet->host = g_strndup(addrstr, hostlen); 3767 } 3768 /* plain VNC port is just an offset, for websocket 3769 * port is absolute */ 3770 if (websocket) { 3771 if (g_str_equal(addrstr, "") || 3772 g_str_equal(addrstr, "on")) { 3773 if (displaynum == -1) { 3774 error_setg(errp, "explicit websocket port is required"); 3775 goto cleanup; 3776 } 3777 inet->port = g_strdup_printf( 3778 "%d", displaynum + 5700); 3779 if (to) { 3780 inet->has_to = true; 3781 inet->to = to + 5700; 3782 } 3783 } else { 3784 inet->port = g_strdup(port); 3785 } 3786 } else { 3787 int offset = reverse ? 0 : 5900; 3788 if (parse_uint_full(port, 10, &baseport) < 0) { 3789 error_setg(errp, "can't convert to a number: %s", port); 3790 goto cleanup; 3791 } 3792 if (baseport > 65535 || 3793 baseport + offset > 65535) { 3794 error_setg(errp, "port %s out of range", port); 3795 goto cleanup; 3796 } 3797 inet->port = g_strdup_printf( 3798 "%d", (int)baseport + offset); 3799 3800 if (to) { 3801 inet->has_to = true; 3802 inet->to = to + offset; 3803 } 3804 } 3805 3806 inet->ipv4 = ipv4; 3807 inet->has_ipv4 = has_ipv4; 3808 inet->ipv6 = ipv6; 3809 inet->has_ipv6 = has_ipv6; 3810 3811 ret = baseport; 3812 } 3813 3814 *retaddr = addr; 3815 3816 cleanup: 3817 if (ret < 0) { 3818 qapi_free_SocketAddress(addr); 3819 } 3820 return ret; 3821 } 3822 3823 static int vnc_display_get_addresses(QemuOpts *opts, 3824 bool reverse, 3825 SocketAddressList **saddr_list_ret, 3826 SocketAddressList **wsaddr_list_ret, 3827 Error **errp) 3828 { 3829 SocketAddress *saddr = NULL; 3830 SocketAddress *wsaddr = NULL; 3831 g_autoptr(SocketAddressList) saddr_list = NULL; 3832 SocketAddressList **saddr_tail = &saddr_list; 3833 SocketAddress *single_saddr = NULL; 3834 g_autoptr(SocketAddressList) wsaddr_list = NULL; 3835 SocketAddressList **wsaddr_tail = &wsaddr_list; 3836 QemuOptsIter addriter; 3837 const char *addr; 3838 int to = qemu_opt_get_number(opts, "to", 0); 3839 bool has_ipv4 = qemu_opt_get(opts, "ipv4"); 3840 bool has_ipv6 = qemu_opt_get(opts, "ipv6"); 3841 bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); 3842 bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); 3843 int displaynum = -1; 3844 3845 addr = qemu_opt_get(opts, "vnc"); 3846 if (addr == NULL || g_str_equal(addr, "none")) { 3847 return 0; 3848 } 3849 if (qemu_opt_get(opts, "websocket") && 3850 !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { 3851 error_setg(errp, 3852 "SHA1 hash support is required for websockets"); 3853 return -1; 3854 } 3855 3856 qemu_opt_iter_init(&addriter, opts, "vnc"); 3857 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3858 int rv; 3859 rv = vnc_display_get_address(addr, false, reverse, 0, to, 3860 has_ipv4, has_ipv6, 3861 ipv4, ipv6, 3862 &saddr, errp); 3863 if (rv < 0) { 3864 return -1; 3865 } 3866 /* Historical compat - first listen address can be used 3867 * to set the default websocket port 3868 */ 3869 if (displaynum == -1) { 3870 displaynum = rv; 3871 } 3872 QAPI_LIST_APPEND(saddr_tail, saddr); 3873 } 3874 3875 if (saddr_list && !saddr_list->next) { 3876 single_saddr = saddr_list->value; 3877 } else { 3878 /* 3879 * If we had multiple primary displays, we don't do defaults 3880 * for websocket, and require explicit config instead. 3881 */ 3882 displaynum = -1; 3883 } 3884 3885 qemu_opt_iter_init(&addriter, opts, "websocket"); 3886 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3887 if (vnc_display_get_address(addr, true, reverse, displaynum, to, 3888 has_ipv4, has_ipv6, 3889 ipv4, ipv6, 3890 &wsaddr, errp) < 0) { 3891 return -1; 3892 } 3893 3894 /* Historical compat - if only a single listen address was 3895 * provided, then this is used to set the default listen 3896 * address for websocket too 3897 */ 3898 if (single_saddr && 3899 single_saddr->type == SOCKET_ADDRESS_TYPE_INET && 3900 wsaddr->type == SOCKET_ADDRESS_TYPE_INET && 3901 g_str_equal(wsaddr->u.inet.host, "") && 3902 !g_str_equal(single_saddr->u.inet.host, "")) { 3903 g_free(wsaddr->u.inet.host); 3904 wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host); 3905 } 3906 3907 QAPI_LIST_APPEND(wsaddr_tail, wsaddr); 3908 } 3909 3910 *saddr_list_ret = g_steal_pointer(&saddr_list); 3911 *wsaddr_list_ret = g_steal_pointer(&wsaddr_list); 3912 return 0; 3913 } 3914 3915 static int vnc_display_connect(VncDisplay *vd, 3916 SocketAddressList *saddr_list, 3917 SocketAddressList *wsaddr_list, 3918 Error **errp) 3919 { 3920 /* connect to viewer */ 3921 QIOChannelSocket *sioc = NULL; 3922 if (wsaddr_list) { 3923 error_setg(errp, "Cannot use websockets in reverse mode"); 3924 return -1; 3925 } 3926 if (!saddr_list || saddr_list->next) { 3927 error_setg(errp, "Expected a single address in reverse mode"); 3928 return -1; 3929 } 3930 /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ 3931 vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; 3932 sioc = qio_channel_socket_new(); 3933 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); 3934 if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { 3935 object_unref(OBJECT(sioc)); 3936 return -1; 3937 } 3938 vnc_connect(vd, sioc, false, false); 3939 object_unref(OBJECT(sioc)); 3940 return 0; 3941 } 3942 3943 3944 static int vnc_display_listen(VncDisplay *vd, 3945 SocketAddressList *saddr_list, 3946 SocketAddressList *wsaddr_list, 3947 Error **errp) 3948 { 3949 SocketAddressList *el; 3950 3951 if (saddr_list) { 3952 vd->listener = qio_net_listener_new(); 3953 qio_net_listener_set_name(vd->listener, "vnc-listen"); 3954 for (el = saddr_list; el; el = el->next) { 3955 if (qio_net_listener_open_sync(vd->listener, 3956 el->value, 1, 3957 errp) < 0) { 3958 return -1; 3959 } 3960 } 3961 3962 qio_net_listener_set_client_func(vd->listener, 3963 vnc_listen_io, vd, NULL); 3964 } 3965 3966 if (wsaddr_list) { 3967 vd->wslistener = qio_net_listener_new(); 3968 qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen"); 3969 for (el = wsaddr_list; el; el = el->next) { 3970 if (qio_net_listener_open_sync(vd->wslistener, 3971 el->value, 1, 3972 errp) < 0) { 3973 return -1; 3974 } 3975 } 3976 3977 qio_net_listener_set_client_func(vd->wslistener, 3978 vnc_listen_io, vd, NULL); 3979 } 3980 3981 return 0; 3982 } 3983 3984 bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp) 3985 { 3986 VncDisplay *vd = vnc_display_find(NULL); 3987 3988 if (!vd) { 3989 error_setg(errp, "Can not find vnc display"); 3990 return false; 3991 } 3992 3993 if (arg->has_addresses) { 3994 if (vd->listener) { 3995 qio_net_listener_disconnect(vd->listener); 3996 object_unref(OBJECT(vd->listener)); 3997 vd->listener = NULL; 3998 } 3999 4000 if (vnc_display_listen(vd, arg->addresses, NULL, errp) < 0) { 4001 return false; 4002 } 4003 } 4004 4005 return true; 4006 } 4007 4008 void vnc_display_open(const char *id, Error **errp) 4009 { 4010 VncDisplay *vd = vnc_display_find(id); 4011 QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); 4012 g_autoptr(SocketAddressList) saddr_list = NULL; 4013 g_autoptr(SocketAddressList) wsaddr_list = NULL; 4014 const char *share, *device_id; 4015 QemuConsole *con; 4016 bool password = false; 4017 bool reverse = false; 4018 const char *credid; 4019 bool sasl = false; 4020 const char *tlsauthz; 4021 const char *saslauthz; 4022 int lock_key_sync = 1; 4023 int key_delay_ms; 4024 const char *audiodev; 4025 const char *passwordSecret; 4026 4027 if (!vd) { 4028 error_setg(errp, "VNC display not active"); 4029 return; 4030 } 4031 vnc_display_close(vd); 4032 4033 if (!opts) { 4034 return; 4035 } 4036 4037 reverse = qemu_opt_get_bool(opts, "reverse", false); 4038 if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list, 4039 errp) < 0) { 4040 goto fail; 4041 } 4042 4043 4044 passwordSecret = qemu_opt_get(opts, "password-secret"); 4045 if (passwordSecret) { 4046 if (qemu_opt_get(opts, "password")) { 4047 error_setg(errp, 4048 "'password' flag is redundant with 'password-secret'"); 4049 goto fail; 4050 } 4051 vd->password = qcrypto_secret_lookup_as_utf8(passwordSecret, 4052 errp); 4053 if (!vd->password) { 4054 goto fail; 4055 } 4056 password = true; 4057 } else { 4058 password = qemu_opt_get_bool(opts, "password", false); 4059 } 4060 if (password) { 4061 if (!qcrypto_cipher_supports( 4062 QCRYPTO_CIPHER_ALG_DES, QCRYPTO_CIPHER_MODE_ECB)) { 4063 error_setg(errp, 4064 "Cipher backend does not support DES algorithm"); 4065 goto fail; 4066 } 4067 } 4068 4069 lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); 4070 key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 10); 4071 sasl = qemu_opt_get_bool(opts, "sasl", false); 4072 #ifndef CONFIG_VNC_SASL 4073 if (sasl) { 4074 error_setg(errp, "VNC SASL auth requires cyrus-sasl support"); 4075 goto fail; 4076 } 4077 #endif /* CONFIG_VNC_SASL */ 4078 credid = qemu_opt_get(opts, "tls-creds"); 4079 if (credid) { 4080 Object *creds; 4081 creds = object_resolve_path_component( 4082 object_get_objects_root(), credid); 4083 if (!creds) { 4084 error_setg(errp, "No TLS credentials with id '%s'", 4085 credid); 4086 goto fail; 4087 } 4088 vd->tlscreds = (QCryptoTLSCreds *) 4089 object_dynamic_cast(creds, 4090 TYPE_QCRYPTO_TLS_CREDS); 4091 if (!vd->tlscreds) { 4092 error_setg(errp, "Object with id '%s' is not TLS credentials", 4093 credid); 4094 goto fail; 4095 } 4096 object_ref(OBJECT(vd->tlscreds)); 4097 4098 if (!qcrypto_tls_creds_check_endpoint(vd->tlscreds, 4099 QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4100 errp)) { 4101 goto fail; 4102 } 4103 } 4104 tlsauthz = qemu_opt_get(opts, "tls-authz"); 4105 if (tlsauthz && !vd->tlscreds) { 4106 error_setg(errp, "'tls-authz' provided but TLS is not enabled"); 4107 goto fail; 4108 } 4109 4110 saslauthz = qemu_opt_get(opts, "sasl-authz"); 4111 if (saslauthz && !sasl) { 4112 error_setg(errp, "'sasl-authz' provided but SASL auth is not enabled"); 4113 goto fail; 4114 } 4115 4116 share = qemu_opt_get(opts, "share"); 4117 if (share) { 4118 if (strcmp(share, "ignore") == 0) { 4119 vd->share_policy = VNC_SHARE_POLICY_IGNORE; 4120 } else if (strcmp(share, "allow-exclusive") == 0) { 4121 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4122 } else if (strcmp(share, "force-shared") == 0) { 4123 vd->share_policy = VNC_SHARE_POLICY_FORCE_SHARED; 4124 } else { 4125 error_setg(errp, "unknown vnc share= option"); 4126 goto fail; 4127 } 4128 } else { 4129 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4130 } 4131 vd->connections_limit = qemu_opt_get_number(opts, "connections", 32); 4132 4133 #ifdef CONFIG_VNC_JPEG 4134 vd->lossy = qemu_opt_get_bool(opts, "lossy", false); 4135 #endif 4136 vd->non_adaptive = qemu_opt_get_bool(opts, "non-adaptive", false); 4137 /* adaptive updates are only used with tight encoding and 4138 * if lossy updates are enabled so we can disable all the 4139 * calculations otherwise */ 4140 if (!vd->lossy) { 4141 vd->non_adaptive = true; 4142 } 4143 4144 vd->power_control = qemu_opt_get_bool(opts, "power-control", false); 4145 4146 if (tlsauthz) { 4147 vd->tlsauthzid = g_strdup(tlsauthz); 4148 } 4149 #ifdef CONFIG_VNC_SASL 4150 if (sasl) { 4151 if (saslauthz) { 4152 vd->sasl.authzid = g_strdup(saslauthz); 4153 } 4154 } 4155 #endif 4156 4157 if (vnc_display_setup_auth(&vd->auth, &vd->subauth, 4158 vd->tlscreds, password, 4159 sasl, false, errp) < 0) { 4160 goto fail; 4161 } 4162 trace_vnc_auth_init(vd, 0, vd->auth, vd->subauth); 4163 4164 if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth, 4165 vd->tlscreds, password, 4166 sasl, true, errp) < 0) { 4167 goto fail; 4168 } 4169 trace_vnc_auth_init(vd, 1, vd->ws_auth, vd->ws_subauth); 4170 4171 #ifdef CONFIG_VNC_SASL 4172 if (sasl && !vnc_sasl_server_init(errp)) { 4173 goto fail; 4174 } 4175 #endif 4176 vd->lock_key_sync = lock_key_sync; 4177 if (lock_key_sync) { 4178 vd->led = qemu_add_led_event_handler(kbd_leds, vd); 4179 } 4180 vd->ledstate = 0; 4181 4182 audiodev = qemu_opt_get(opts, "audiodev"); 4183 if (audiodev) { 4184 vd->audio_state = audio_state_by_name(audiodev, errp); 4185 if (!vd->audio_state) { 4186 goto fail; 4187 } 4188 } 4189 4190 device_id = qemu_opt_get(opts, "display"); 4191 if (device_id) { 4192 int head = qemu_opt_get_number(opts, "head", 0); 4193 Error *err = NULL; 4194 4195 con = qemu_console_lookup_by_device_name(device_id, head, &err); 4196 if (err) { 4197 error_propagate(errp, err); 4198 goto fail; 4199 } 4200 } else { 4201 con = NULL; 4202 } 4203 4204 if (con != vd->dcl.con) { 4205 qkbd_state_free(vd->kbd); 4206 unregister_displaychangelistener(&vd->dcl); 4207 vd->dcl.con = con; 4208 register_displaychangelistener(&vd->dcl); 4209 vd->kbd = qkbd_state_init(vd->dcl.con); 4210 } 4211 qkbd_state_set_delay(vd->kbd, key_delay_ms); 4212 4213 if (saddr_list == NULL) { 4214 return; 4215 } 4216 4217 if (reverse) { 4218 if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { 4219 goto fail; 4220 } 4221 } else { 4222 if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { 4223 goto fail; 4224 } 4225 } 4226 4227 if (qemu_opt_get(opts, "to")) { 4228 vnc_display_print_local_addr(vd); 4229 } 4230 4231 /* Success */ 4232 return; 4233 4234 fail: 4235 vnc_display_close(vd); 4236 } 4237 4238 void vnc_display_add_client(const char *id, int csock, bool skipauth) 4239 { 4240 VncDisplay *vd = vnc_display_find(id); 4241 QIOChannelSocket *sioc; 4242 4243 if (!vd) { 4244 return; 4245 } 4246 4247 sioc = qio_channel_socket_new_fd(csock, NULL); 4248 if (sioc) { 4249 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); 4250 vnc_connect(vd, sioc, skipauth, false); 4251 object_unref(OBJECT(sioc)); 4252 } 4253 } 4254 4255 static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) 4256 { 4257 int i = 2; 4258 char *id; 4259 4260 id = g_strdup("default"); 4261 while (qemu_opts_find(olist, id)) { 4262 g_free(id); 4263 id = g_strdup_printf("vnc%d", i++); 4264 } 4265 qemu_opts_set_id(opts, id); 4266 } 4267 4268 void vnc_parse(const char *str) 4269 { 4270 QemuOptsList *olist = qemu_find_opts("vnc"); 4271 QemuOpts *opts = qemu_opts_parse_noisily(olist, str, !is_help_option(str)); 4272 const char *id; 4273 4274 if (!opts) { 4275 exit(1); 4276 } 4277 4278 id = qemu_opts_id(opts); 4279 if (!id) { 4280 /* auto-assign id if not present */ 4281 vnc_auto_assign_id(olist, opts); 4282 } 4283 } 4284 4285 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) 4286 { 4287 Error *local_err = NULL; 4288 char *id = (char *)qemu_opts_id(opts); 4289 4290 assert(id); 4291 vnc_display_init(id, &local_err); 4292 if (local_err) { 4293 error_propagate(errp, local_err); 4294 return -1; 4295 } 4296 vnc_display_open(id, &local_err); 4297 if (local_err != NULL) { 4298 error_propagate(errp, local_err); 4299 return -1; 4300 } 4301 return 0; 4302 } 4303 4304 static void vnc_register_config(void) 4305 { 4306 qemu_add_opts(&qemu_vnc_opts); 4307 } 4308 opts_init(vnc_register_config); 4309