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; 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 = vs->vd->cursor; 992 int isize; 993 994 if (!vs->vd->cursor) { 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 cursor_put(vd->cursor); 1033 g_free(vd->cursor_mask); 1034 1035 vd->cursor = c; 1036 cursor_get(vd->cursor); 1037 vd->cursor_msize = cursor_get_mono_bpl(c) * c->height; 1038 vd->cursor_mask = g_malloc0(vd->cursor_msize); 1039 cursor_get_mono_mask(c, 0, vd->cursor_mask); 1040 1041 QTAILQ_FOREACH(vs, &vd->clients, next) { 1042 vnc_cursor_define(vs); 1043 } 1044 } 1045 1046 static int find_and_clear_dirty_height(VncState *vs, 1047 int y, int last_x, int x, int height) 1048 { 1049 int h; 1050 1051 for (h = 1; h < (height - y); h++) { 1052 if (!test_bit(last_x, vs->dirty[y + h])) { 1053 break; 1054 } 1055 bitmap_clear(vs->dirty[y + h], last_x, x - last_x); 1056 } 1057 1058 return h; 1059 } 1060 1061 /* 1062 * Figure out how much pending data we should allow in the output 1063 * buffer before we throttle incremental display updates, and/or 1064 * drop audio samples. 1065 * 1066 * We allow for equiv of 1 full display's worth of FB updates, 1067 * and 1 second of audio samples. If audio backlog was larger 1068 * than that the client would already suffering awful audio 1069 * glitches, so dropping samples is no worse really). 1070 */ 1071 static void vnc_update_throttle_offset(VncState *vs) 1072 { 1073 size_t offset = 1074 vs->client_width * vs->client_height * vs->client_pf.bytes_per_pixel; 1075 1076 if (vs->audio_cap) { 1077 int bps; 1078 switch (vs->as.fmt) { 1079 default: 1080 case AUDIO_FORMAT_U8: 1081 case AUDIO_FORMAT_S8: 1082 bps = 1; 1083 break; 1084 case AUDIO_FORMAT_U16: 1085 case AUDIO_FORMAT_S16: 1086 bps = 2; 1087 break; 1088 case AUDIO_FORMAT_U32: 1089 case AUDIO_FORMAT_S32: 1090 bps = 4; 1091 break; 1092 } 1093 offset += vs->as.freq * bps * vs->as.nchannels; 1094 } 1095 1096 /* Put a floor of 1MB on offset, so that if we have a large pending 1097 * buffer and the display is resized to a small size & back again 1098 * we don't suddenly apply a tiny send limit 1099 */ 1100 offset = MAX(offset, 1024 * 1024); 1101 1102 if (vs->throttle_output_offset != offset) { 1103 trace_vnc_client_throttle_threshold( 1104 vs, vs->ioc, vs->throttle_output_offset, offset, vs->client_width, 1105 vs->client_height, vs->client_pf.bytes_per_pixel, vs->audio_cap); 1106 } 1107 1108 vs->throttle_output_offset = offset; 1109 } 1110 1111 static bool vnc_should_update(VncState *vs) 1112 { 1113 switch (vs->update) { 1114 case VNC_STATE_UPDATE_NONE: 1115 break; 1116 case VNC_STATE_UPDATE_INCREMENTAL: 1117 /* Only allow incremental updates if the pending send queue 1118 * is less than the permitted threshold, and the job worker 1119 * is completely idle. 1120 */ 1121 if (vs->output.offset < vs->throttle_output_offset && 1122 vs->job_update == VNC_STATE_UPDATE_NONE) { 1123 return true; 1124 } 1125 trace_vnc_client_throttle_incremental( 1126 vs, vs->ioc, vs->job_update, vs->output.offset); 1127 break; 1128 case VNC_STATE_UPDATE_FORCE: 1129 /* Only allow forced updates if the pending send queue 1130 * does not contain a previous forced update, and the 1131 * job worker is completely idle. 1132 * 1133 * Note this means we'll queue a forced update, even if 1134 * the output buffer size is otherwise over the throttle 1135 * output limit. 1136 */ 1137 if (vs->force_update_offset == 0 && 1138 vs->job_update == VNC_STATE_UPDATE_NONE) { 1139 return true; 1140 } 1141 trace_vnc_client_throttle_forced( 1142 vs, vs->ioc, vs->job_update, vs->force_update_offset); 1143 break; 1144 } 1145 return false; 1146 } 1147 1148 static int vnc_update_client(VncState *vs, int has_dirty) 1149 { 1150 VncDisplay *vd = vs->vd; 1151 VncJob *job; 1152 int y; 1153 int height, width; 1154 int n = 0; 1155 1156 if (vs->disconnecting) { 1157 vnc_disconnect_finish(vs); 1158 return 0; 1159 } 1160 1161 vs->has_dirty += has_dirty; 1162 if (!vnc_should_update(vs)) { 1163 return 0; 1164 } 1165 1166 if (!vs->has_dirty && vs->update != VNC_STATE_UPDATE_FORCE) { 1167 return 0; 1168 } 1169 1170 /* 1171 * Send screen updates to the vnc client using the server 1172 * surface and server dirty map. guest surface updates 1173 * happening in parallel don't disturb us, the next pass will 1174 * send them to the client. 1175 */ 1176 job = vnc_job_new(vs); 1177 1178 height = pixman_image_get_height(vd->server); 1179 width = pixman_image_get_width(vd->server); 1180 1181 y = 0; 1182 for (;;) { 1183 int x, h; 1184 unsigned long x2; 1185 unsigned long offset = find_next_bit((unsigned long *) &vs->dirty, 1186 height * VNC_DIRTY_BPL(vs), 1187 y * VNC_DIRTY_BPL(vs)); 1188 if (offset == height * VNC_DIRTY_BPL(vs)) { 1189 /* no more dirty bits */ 1190 break; 1191 } 1192 y = offset / VNC_DIRTY_BPL(vs); 1193 x = offset % VNC_DIRTY_BPL(vs); 1194 x2 = find_next_zero_bit((unsigned long *) &vs->dirty[y], 1195 VNC_DIRTY_BPL(vs), x); 1196 bitmap_clear(vs->dirty[y], x, x2 - x); 1197 h = find_and_clear_dirty_height(vs, y, x, x2, height); 1198 x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT); 1199 if (x2 > x) { 1200 n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y, 1201 (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h); 1202 } 1203 if (!x && x2 == width / VNC_DIRTY_PIXELS_PER_BIT) { 1204 y += h; 1205 if (y == height) { 1206 break; 1207 } 1208 } 1209 } 1210 1211 vs->job_update = vs->update; 1212 vs->update = VNC_STATE_UPDATE_NONE; 1213 vnc_job_push(job); 1214 vs->has_dirty = 0; 1215 return n; 1216 } 1217 1218 /* audio */ 1219 static void audio_capture_notify(void *opaque, audcnotification_e cmd) 1220 { 1221 VncState *vs = opaque; 1222 1223 assert(vs->magic == VNC_MAGIC); 1224 switch (cmd) { 1225 case AUD_CNOTIFY_DISABLE: 1226 trace_vnc_msg_server_audio_end(vs, vs->ioc); 1227 vnc_lock_output(vs); 1228 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1229 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1230 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END); 1231 vnc_unlock_output(vs); 1232 vnc_flush(vs); 1233 break; 1234 1235 case AUD_CNOTIFY_ENABLE: 1236 trace_vnc_msg_server_audio_begin(vs, vs->ioc); 1237 vnc_lock_output(vs); 1238 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1239 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1240 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN); 1241 vnc_unlock_output(vs); 1242 vnc_flush(vs); 1243 break; 1244 } 1245 } 1246 1247 static void audio_capture_destroy(void *opaque) 1248 { 1249 } 1250 1251 static void audio_capture(void *opaque, const void *buf, int size) 1252 { 1253 VncState *vs = opaque; 1254 1255 assert(vs->magic == VNC_MAGIC); 1256 trace_vnc_msg_server_audio_data(vs, vs->ioc, buf, size); 1257 vnc_lock_output(vs); 1258 if (vs->output.offset < vs->throttle_output_offset) { 1259 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU); 1260 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO); 1261 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA); 1262 vnc_write_u32(vs, size); 1263 vnc_write(vs, buf, size); 1264 } else { 1265 trace_vnc_client_throttle_audio(vs, vs->ioc, vs->output.offset); 1266 } 1267 vnc_unlock_output(vs); 1268 vnc_flush(vs); 1269 } 1270 1271 static void audio_add(VncState *vs) 1272 { 1273 struct audio_capture_ops ops; 1274 1275 if (vs->audio_cap) { 1276 error_report("audio already running"); 1277 return; 1278 } 1279 1280 ops.notify = audio_capture_notify; 1281 ops.destroy = audio_capture_destroy; 1282 ops.capture = audio_capture; 1283 1284 vs->audio_cap = AUD_add_capture(vs->vd->audio_state, &vs->as, &ops, vs); 1285 if (!vs->audio_cap) { 1286 error_report("Failed to add audio capture"); 1287 } 1288 } 1289 1290 static void audio_del(VncState *vs) 1291 { 1292 if (vs->audio_cap) { 1293 AUD_del_capture(vs->audio_cap, vs); 1294 vs->audio_cap = NULL; 1295 } 1296 } 1297 1298 static void vnc_disconnect_start(VncState *vs) 1299 { 1300 if (vs->disconnecting) { 1301 return; 1302 } 1303 trace_vnc_client_disconnect_start(vs, vs->ioc); 1304 vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED); 1305 if (vs->ioc_tag) { 1306 g_source_remove(vs->ioc_tag); 1307 vs->ioc_tag = 0; 1308 } 1309 qio_channel_close(vs->ioc, NULL); 1310 vs->disconnecting = TRUE; 1311 } 1312 1313 void vnc_disconnect_finish(VncState *vs) 1314 { 1315 int i; 1316 1317 trace_vnc_client_disconnect_finish(vs, vs->ioc); 1318 1319 vnc_jobs_join(vs); /* Wait encoding jobs */ 1320 1321 vnc_lock_output(vs); 1322 vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED); 1323 1324 buffer_free(&vs->input); 1325 buffer_free(&vs->output); 1326 1327 qapi_free_VncClientInfo(vs->info); 1328 1329 vnc_zlib_clear(vs); 1330 vnc_tight_clear(vs); 1331 vnc_zrle_clear(vs); 1332 1333 #ifdef CONFIG_VNC_SASL 1334 vnc_sasl_client_cleanup(vs); 1335 #endif /* CONFIG_VNC_SASL */ 1336 audio_del(vs); 1337 qkbd_state_lift_all_keys(vs->vd->kbd); 1338 1339 if (vs->mouse_mode_notifier.notify != NULL) { 1340 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 1341 } 1342 QTAILQ_REMOVE(&vs->vd->clients, vs, next); 1343 if (QTAILQ_EMPTY(&vs->vd->clients)) { 1344 /* last client gone */ 1345 vnc_update_server_surface(vs->vd); 1346 } 1347 vnc_unlock_output(vs); 1348 1349 if (vs->cbpeer.notifier.notify) { 1350 qemu_clipboard_peer_unregister(&vs->cbpeer); 1351 } 1352 1353 qemu_mutex_destroy(&vs->output_mutex); 1354 if (vs->bh != NULL) { 1355 qemu_bh_delete(vs->bh); 1356 } 1357 buffer_free(&vs->jobs_buffer); 1358 1359 for (i = 0; i < VNC_STAT_ROWS; ++i) { 1360 g_free(vs->lossy_rect[i]); 1361 } 1362 g_free(vs->lossy_rect); 1363 1364 object_unref(OBJECT(vs->ioc)); 1365 vs->ioc = NULL; 1366 object_unref(OBJECT(vs->sioc)); 1367 vs->sioc = NULL; 1368 vs->magic = 0; 1369 g_free(vs->zrle); 1370 g_free(vs->tight); 1371 g_free(vs); 1372 } 1373 1374 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err) 1375 { 1376 if (ret <= 0) { 1377 if (ret == 0) { 1378 trace_vnc_client_eof(vs, vs->ioc); 1379 vnc_disconnect_start(vs); 1380 } else if (ret != QIO_CHANNEL_ERR_BLOCK) { 1381 trace_vnc_client_io_error(vs, vs->ioc, 1382 err ? error_get_pretty(err) : "Unknown"); 1383 vnc_disconnect_start(vs); 1384 } 1385 1386 error_free(err); 1387 return 0; 1388 } 1389 return ret; 1390 } 1391 1392 1393 void vnc_client_error(VncState *vs) 1394 { 1395 VNC_DEBUG("Closing down client sock: protocol error\n"); 1396 vnc_disconnect_start(vs); 1397 } 1398 1399 1400 /* 1401 * Called to write a chunk of data to the client socket. The data may 1402 * be the raw data, or may have already been encoded by SASL. 1403 * The data will be written either straight onto the socket, or 1404 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1405 * 1406 * NB, it is theoretically possible to have 2 layers of encryption, 1407 * both SASL, and this TLS layer. It is highly unlikely in practice 1408 * though, since SASL encryption will typically be a no-op if TLS 1409 * is active 1410 * 1411 * Returns the number of bytes written, which may be less than 1412 * the requested 'datalen' if the socket would block. Returns 1413 * 0 on I/O error, and disconnects the client socket. 1414 */ 1415 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen) 1416 { 1417 Error *err = NULL; 1418 ssize_t ret; 1419 ret = qio_channel_write(vs->ioc, (const char *)data, datalen, &err); 1420 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret); 1421 return vnc_client_io_error(vs, ret, err); 1422 } 1423 1424 1425 /* 1426 * Called to write buffered data to the client socket, when not 1427 * using any SASL SSF encryption layers. Will write as much data 1428 * as possible without blocking. If all buffered data is written, 1429 * will switch the FD poll() handler back to read monitoring. 1430 * 1431 * Returns the number of bytes written, which may be less than 1432 * the buffered output data if the socket would block. Returns 1433 * 0 on I/O error, and disconnects the client socket. 1434 */ 1435 static size_t vnc_client_write_plain(VncState *vs) 1436 { 1437 size_t offset; 1438 size_t ret; 1439 1440 #ifdef CONFIG_VNC_SASL 1441 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n", 1442 vs->output.buffer, vs->output.capacity, vs->output.offset, 1443 vs->sasl.waitWriteSSF); 1444 1445 if (vs->sasl.conn && 1446 vs->sasl.runSSF && 1447 vs->sasl.waitWriteSSF) { 1448 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF); 1449 if (ret) 1450 vs->sasl.waitWriteSSF -= ret; 1451 } else 1452 #endif /* CONFIG_VNC_SASL */ 1453 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset); 1454 if (!ret) 1455 return 0; 1456 1457 if (ret >= vs->force_update_offset) { 1458 if (vs->force_update_offset != 0) { 1459 trace_vnc_client_unthrottle_forced(vs, vs->ioc); 1460 } 1461 vs->force_update_offset = 0; 1462 } else { 1463 vs->force_update_offset -= ret; 1464 } 1465 offset = vs->output.offset; 1466 buffer_advance(&vs->output, ret); 1467 if (offset >= vs->throttle_output_offset && 1468 vs->output.offset < vs->throttle_output_offset) { 1469 trace_vnc_client_unthrottle_incremental(vs, vs->ioc, vs->output.offset); 1470 } 1471 1472 if (vs->output.offset == 0) { 1473 if (vs->ioc_tag) { 1474 g_source_remove(vs->ioc_tag); 1475 } 1476 vs->ioc_tag = qio_channel_add_watch( 1477 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1478 vnc_client_io, vs, NULL); 1479 } 1480 1481 return ret; 1482 } 1483 1484 1485 /* 1486 * First function called whenever there is data to be written to 1487 * the client socket. Will delegate actual work according to whether 1488 * SASL SSF layers are enabled (thus requiring encryption calls) 1489 */ 1490 static void vnc_client_write_locked(VncState *vs) 1491 { 1492 #ifdef CONFIG_VNC_SASL 1493 if (vs->sasl.conn && 1494 vs->sasl.runSSF && 1495 !vs->sasl.waitWriteSSF) { 1496 vnc_client_write_sasl(vs); 1497 } else 1498 #endif /* CONFIG_VNC_SASL */ 1499 { 1500 vnc_client_write_plain(vs); 1501 } 1502 } 1503 1504 static void vnc_client_write(VncState *vs) 1505 { 1506 assert(vs->magic == VNC_MAGIC); 1507 vnc_lock_output(vs); 1508 if (vs->output.offset) { 1509 vnc_client_write_locked(vs); 1510 } else if (vs->ioc != NULL) { 1511 if (vs->ioc_tag) { 1512 g_source_remove(vs->ioc_tag); 1513 } 1514 vs->ioc_tag = qio_channel_add_watch( 1515 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 1516 vnc_client_io, vs, NULL); 1517 } 1518 vnc_unlock_output(vs); 1519 } 1520 1521 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) 1522 { 1523 vs->read_handler = func; 1524 vs->read_handler_expect = expecting; 1525 } 1526 1527 1528 /* 1529 * Called to read a chunk of data from the client socket. The data may 1530 * be the raw data, or may need to be further decoded by SASL. 1531 * The data will be read either straight from to the socket, or 1532 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled 1533 * 1534 * NB, it is theoretically possible to have 2 layers of encryption, 1535 * both SASL, and this TLS layer. It is highly unlikely in practice 1536 * though, since SASL encryption will typically be a no-op if TLS 1537 * is active 1538 * 1539 * Returns the number of bytes read, which may be less than 1540 * the requested 'datalen' if the socket would block. Returns 1541 * 0 on I/O error or EOF, and disconnects the client socket. 1542 */ 1543 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen) 1544 { 1545 ssize_t ret; 1546 Error *err = NULL; 1547 ret = qio_channel_read(vs->ioc, (char *)data, datalen, &err); 1548 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret); 1549 return vnc_client_io_error(vs, ret, err); 1550 } 1551 1552 1553 /* 1554 * Called to read data from the client socket to the input buffer, 1555 * when not using any SASL SSF encryption layers. Will read as much 1556 * data as possible without blocking. 1557 * 1558 * Returns the number of bytes read, which may be less than 1559 * the requested 'datalen' if the socket would block. Returns 1560 * 0 on I/O error or EOF, and disconnects the client socket. 1561 */ 1562 static size_t vnc_client_read_plain(VncState *vs) 1563 { 1564 size_t ret; 1565 VNC_DEBUG("Read plain %p size %zd offset %zd\n", 1566 vs->input.buffer, vs->input.capacity, vs->input.offset); 1567 buffer_reserve(&vs->input, 4096); 1568 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096); 1569 if (!ret) 1570 return 0; 1571 vs->input.offset += ret; 1572 return ret; 1573 } 1574 1575 static void vnc_jobs_bh(void *opaque) 1576 { 1577 VncState *vs = opaque; 1578 1579 assert(vs->magic == VNC_MAGIC); 1580 vnc_jobs_consume_buffer(vs); 1581 } 1582 1583 /* 1584 * First function called whenever there is more data to be read from 1585 * the client socket. Will delegate actual work according to whether 1586 * SASL SSF layers are enabled (thus requiring decryption calls) 1587 * Returns 0 on success, -1 if client disconnected 1588 */ 1589 static int vnc_client_read(VncState *vs) 1590 { 1591 size_t ret; 1592 1593 #ifdef CONFIG_VNC_SASL 1594 if (vs->sasl.conn && vs->sasl.runSSF) 1595 ret = vnc_client_read_sasl(vs); 1596 else 1597 #endif /* CONFIG_VNC_SASL */ 1598 ret = vnc_client_read_plain(vs); 1599 if (!ret) { 1600 if (vs->disconnecting) { 1601 vnc_disconnect_finish(vs); 1602 return -1; 1603 } 1604 return 0; 1605 } 1606 1607 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { 1608 size_t len = vs->read_handler_expect; 1609 int ret; 1610 1611 ret = vs->read_handler(vs, vs->input.buffer, len); 1612 if (vs->disconnecting) { 1613 vnc_disconnect_finish(vs); 1614 return -1; 1615 } 1616 1617 if (!ret) { 1618 buffer_advance(&vs->input, len); 1619 } else { 1620 vs->read_handler_expect = ret; 1621 } 1622 } 1623 return 0; 1624 } 1625 1626 gboolean vnc_client_io(QIOChannel *ioc G_GNUC_UNUSED, 1627 GIOCondition condition, void *opaque) 1628 { 1629 VncState *vs = opaque; 1630 1631 assert(vs->magic == VNC_MAGIC); 1632 1633 if (condition & (G_IO_HUP | G_IO_ERR)) { 1634 vnc_disconnect_start(vs); 1635 return TRUE; 1636 } 1637 1638 if (condition & G_IO_IN) { 1639 if (vnc_client_read(vs) < 0) { 1640 /* vs is free()ed here */ 1641 return TRUE; 1642 } 1643 } 1644 if (condition & G_IO_OUT) { 1645 vnc_client_write(vs); 1646 } 1647 1648 if (vs->disconnecting) { 1649 if (vs->ioc_tag != 0) { 1650 g_source_remove(vs->ioc_tag); 1651 } 1652 vs->ioc_tag = 0; 1653 } 1654 return TRUE; 1655 } 1656 1657 1658 /* 1659 * Scale factor to apply to vs->throttle_output_offset when checking for 1660 * hard limit. Worst case normal usage could be x2, if we have a complete 1661 * incremental update and complete forced update in the output buffer. 1662 * So x3 should be good enough, but we pick x5 to be conservative and thus 1663 * (hopefully) never trigger incorrectly. 1664 */ 1665 #define VNC_THROTTLE_OUTPUT_LIMIT_SCALE 5 1666 1667 void vnc_write(VncState *vs, const void *data, size_t len) 1668 { 1669 assert(vs->magic == VNC_MAGIC); 1670 if (vs->disconnecting) { 1671 return; 1672 } 1673 /* Protection against malicious client/guest to prevent our output 1674 * buffer growing without bound if client stops reading data. This 1675 * should rarely trigger, because we have earlier throttling code 1676 * which stops issuing framebuffer updates and drops audio data 1677 * if the throttle_output_offset value is exceeded. So we only reach 1678 * this higher level if a huge number of pseudo-encodings get 1679 * triggered while data can't be sent on the socket. 1680 * 1681 * NB throttle_output_offset can be zero during early protocol 1682 * handshake, or from the job thread's VncState clone 1683 */ 1684 if (vs->throttle_output_offset != 0 && 1685 (vs->output.offset / VNC_THROTTLE_OUTPUT_LIMIT_SCALE) > 1686 vs->throttle_output_offset) { 1687 trace_vnc_client_output_limit(vs, vs->ioc, vs->output.offset, 1688 vs->throttle_output_offset); 1689 vnc_disconnect_start(vs); 1690 return; 1691 } 1692 buffer_reserve(&vs->output, len); 1693 1694 if (vs->ioc != NULL && buffer_empty(&vs->output)) { 1695 if (vs->ioc_tag) { 1696 g_source_remove(vs->ioc_tag); 1697 } 1698 vs->ioc_tag = qio_channel_add_watch( 1699 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_OUT, 1700 vnc_client_io, vs, NULL); 1701 } 1702 1703 buffer_append(&vs->output, data, len); 1704 } 1705 1706 void vnc_write_s32(VncState *vs, int32_t value) 1707 { 1708 vnc_write_u32(vs, *(uint32_t *)&value); 1709 } 1710 1711 void vnc_write_u32(VncState *vs, uint32_t value) 1712 { 1713 uint8_t buf[4]; 1714 1715 buf[0] = (value >> 24) & 0xFF; 1716 buf[1] = (value >> 16) & 0xFF; 1717 buf[2] = (value >> 8) & 0xFF; 1718 buf[3] = value & 0xFF; 1719 1720 vnc_write(vs, buf, 4); 1721 } 1722 1723 void vnc_write_u16(VncState *vs, uint16_t value) 1724 { 1725 uint8_t buf[2]; 1726 1727 buf[0] = (value >> 8) & 0xFF; 1728 buf[1] = value & 0xFF; 1729 1730 vnc_write(vs, buf, 2); 1731 } 1732 1733 void vnc_write_u8(VncState *vs, uint8_t value) 1734 { 1735 vnc_write(vs, (char *)&value, 1); 1736 } 1737 1738 void vnc_flush(VncState *vs) 1739 { 1740 vnc_lock_output(vs); 1741 if (vs->ioc != NULL && vs->output.offset) { 1742 vnc_client_write_locked(vs); 1743 } 1744 if (vs->disconnecting) { 1745 if (vs->ioc_tag != 0) { 1746 g_source_remove(vs->ioc_tag); 1747 } 1748 vs->ioc_tag = 0; 1749 } 1750 vnc_unlock_output(vs); 1751 } 1752 1753 static uint8_t read_u8(uint8_t *data, size_t offset) 1754 { 1755 return data[offset]; 1756 } 1757 1758 static uint16_t read_u16(uint8_t *data, size_t offset) 1759 { 1760 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); 1761 } 1762 1763 static int32_t read_s32(uint8_t *data, size_t offset) 1764 { 1765 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | 1766 (data[offset + 2] << 8) | data[offset + 3]); 1767 } 1768 1769 uint32_t read_u32(uint8_t *data, size_t offset) 1770 { 1771 return ((data[offset] << 24) | (data[offset + 1] << 16) | 1772 (data[offset + 2] << 8) | data[offset + 3]); 1773 } 1774 1775 static void check_pointer_type_change(Notifier *notifier, void *data) 1776 { 1777 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier); 1778 int absolute = qemu_input_is_absolute(); 1779 1780 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { 1781 vnc_lock_output(vs); 1782 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1783 vnc_write_u8(vs, 0); 1784 vnc_write_u16(vs, 1); 1785 vnc_framebuffer_update(vs, absolute, 0, 1786 pixman_image_get_width(vs->vd->server), 1787 pixman_image_get_height(vs->vd->server), 1788 VNC_ENCODING_POINTER_TYPE_CHANGE); 1789 vnc_unlock_output(vs); 1790 vnc_flush(vs); 1791 } 1792 vs->absolute = absolute; 1793 } 1794 1795 static void pointer_event(VncState *vs, int button_mask, int x, int y) 1796 { 1797 static uint32_t bmap[INPUT_BUTTON__MAX] = { 1798 [INPUT_BUTTON_LEFT] = 0x01, 1799 [INPUT_BUTTON_MIDDLE] = 0x02, 1800 [INPUT_BUTTON_RIGHT] = 0x04, 1801 [INPUT_BUTTON_WHEEL_UP] = 0x08, 1802 [INPUT_BUTTON_WHEEL_DOWN] = 0x10, 1803 }; 1804 QemuConsole *con = vs->vd->dcl.con; 1805 int width = pixman_image_get_width(vs->vd->server); 1806 int height = pixman_image_get_height(vs->vd->server); 1807 1808 if (vs->last_bmask != button_mask) { 1809 qemu_input_update_buttons(con, bmap, vs->last_bmask, button_mask); 1810 vs->last_bmask = button_mask; 1811 } 1812 1813 if (vs->absolute) { 1814 qemu_input_queue_abs(con, INPUT_AXIS_X, x, 0, width); 1815 qemu_input_queue_abs(con, INPUT_AXIS_Y, y, 0, height); 1816 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { 1817 qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF); 1818 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF); 1819 } else { 1820 if (vs->last_x != -1) { 1821 qemu_input_queue_rel(con, INPUT_AXIS_X, x - vs->last_x); 1822 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - vs->last_y); 1823 } 1824 vs->last_x = x; 1825 vs->last_y = y; 1826 } 1827 qemu_input_event_sync(); 1828 } 1829 1830 static void press_key(VncState *vs, QKeyCode qcode) 1831 { 1832 qkbd_state_key_event(vs->vd->kbd, qcode, true); 1833 qkbd_state_key_event(vs->vd->kbd, qcode, false); 1834 } 1835 1836 static void vnc_led_state_change(VncState *vs) 1837 { 1838 if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) { 1839 return; 1840 } 1841 1842 vnc_lock_output(vs); 1843 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 1844 vnc_write_u8(vs, 0); 1845 vnc_write_u16(vs, 1); 1846 vnc_framebuffer_update(vs, 0, 0, 1, 1, VNC_ENCODING_LED_STATE); 1847 vnc_write_u8(vs, vs->vd->ledstate); 1848 vnc_unlock_output(vs); 1849 vnc_flush(vs); 1850 } 1851 1852 static void kbd_leds(void *opaque, int ledstate) 1853 { 1854 VncDisplay *vd = opaque; 1855 VncState *client; 1856 1857 trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED), 1858 (ledstate & QEMU_NUM_LOCK_LED), 1859 (ledstate & QEMU_SCROLL_LOCK_LED)); 1860 1861 if (ledstate == vd->ledstate) { 1862 return; 1863 } 1864 1865 vd->ledstate = ledstate; 1866 1867 QTAILQ_FOREACH(client, &vd->clients, next) { 1868 vnc_led_state_change(client); 1869 } 1870 } 1871 1872 static void do_key_event(VncState *vs, int down, int keycode, int sym) 1873 { 1874 QKeyCode qcode = qemu_input_key_number_to_qcode(keycode); 1875 1876 /* QEMU console switch */ 1877 switch (qcode) { 1878 case Q_KEY_CODE_1 ... Q_KEY_CODE_9: /* '1' to '9' keys */ 1879 if (vs->vd->dcl.con == NULL && down && 1880 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL) && 1881 qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_ALT)) { 1882 /* Reset the modifiers sent to the current console */ 1883 qkbd_state_lift_all_keys(vs->vd->kbd); 1884 console_select(qcode - Q_KEY_CODE_1); 1885 return; 1886 } 1887 default: 1888 break; 1889 } 1890 1891 /* Turn off the lock state sync logic if the client support the led 1892 state extension. 1893 */ 1894 if (down && vs->vd->lock_key_sync && 1895 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1896 keycode_is_keypad(vs->vd->kbd_layout, keycode)) { 1897 /* If the numlock state needs to change then simulate an additional 1898 keypress before sending this one. This will happen if the user 1899 toggles numlock away from the VNC window. 1900 */ 1901 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) { 1902 if (!qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1903 trace_vnc_key_sync_numlock(true); 1904 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1905 } 1906 } else { 1907 if (qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK)) { 1908 trace_vnc_key_sync_numlock(false); 1909 press_key(vs, Q_KEY_CODE_NUM_LOCK); 1910 } 1911 } 1912 } 1913 1914 if (down && vs->vd->lock_key_sync && 1915 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) && 1916 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) { 1917 /* If the capslock state needs to change then simulate an additional 1918 keypress before sending this one. This will happen if the user 1919 toggles capslock away from the VNC window. 1920 */ 1921 int uppercase = !!(sym >= 'A' && sym <= 'Z'); 1922 bool shift = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_SHIFT); 1923 bool capslock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CAPSLOCK); 1924 if (capslock) { 1925 if (uppercase == shift) { 1926 trace_vnc_key_sync_capslock(false); 1927 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1928 } 1929 } else { 1930 if (uppercase != shift) { 1931 trace_vnc_key_sync_capslock(true); 1932 press_key(vs, Q_KEY_CODE_CAPS_LOCK); 1933 } 1934 } 1935 } 1936 1937 qkbd_state_key_event(vs->vd->kbd, qcode, down); 1938 if (!qemu_console_is_graphic(NULL)) { 1939 bool numlock = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_NUMLOCK); 1940 bool control = qkbd_state_modifier_get(vs->vd->kbd, QKBD_MOD_CTRL); 1941 /* QEMU console emulation */ 1942 if (down) { 1943 switch (keycode) { 1944 case 0x2a: /* Left Shift */ 1945 case 0x36: /* Right Shift */ 1946 case 0x1d: /* Left CTRL */ 1947 case 0x9d: /* Right CTRL */ 1948 case 0x38: /* Left ALT */ 1949 case 0xb8: /* Right ALT */ 1950 break; 1951 case 0xc8: 1952 kbd_put_keysym(QEMU_KEY_UP); 1953 break; 1954 case 0xd0: 1955 kbd_put_keysym(QEMU_KEY_DOWN); 1956 break; 1957 case 0xcb: 1958 kbd_put_keysym(QEMU_KEY_LEFT); 1959 break; 1960 case 0xcd: 1961 kbd_put_keysym(QEMU_KEY_RIGHT); 1962 break; 1963 case 0xd3: 1964 kbd_put_keysym(QEMU_KEY_DELETE); 1965 break; 1966 case 0xc7: 1967 kbd_put_keysym(QEMU_KEY_HOME); 1968 break; 1969 case 0xcf: 1970 kbd_put_keysym(QEMU_KEY_END); 1971 break; 1972 case 0xc9: 1973 kbd_put_keysym(QEMU_KEY_PAGEUP); 1974 break; 1975 case 0xd1: 1976 kbd_put_keysym(QEMU_KEY_PAGEDOWN); 1977 break; 1978 1979 case 0x47: 1980 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME); 1981 break; 1982 case 0x48: 1983 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP); 1984 break; 1985 case 0x49: 1986 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP); 1987 break; 1988 case 0x4b: 1989 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT); 1990 break; 1991 case 0x4c: 1992 kbd_put_keysym('5'); 1993 break; 1994 case 0x4d: 1995 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT); 1996 break; 1997 case 0x4f: 1998 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END); 1999 break; 2000 case 0x50: 2001 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN); 2002 break; 2003 case 0x51: 2004 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN); 2005 break; 2006 case 0x52: 2007 kbd_put_keysym('0'); 2008 break; 2009 case 0x53: 2010 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE); 2011 break; 2012 2013 case 0xb5: 2014 kbd_put_keysym('/'); 2015 break; 2016 case 0x37: 2017 kbd_put_keysym('*'); 2018 break; 2019 case 0x4a: 2020 kbd_put_keysym('-'); 2021 break; 2022 case 0x4e: 2023 kbd_put_keysym('+'); 2024 break; 2025 case 0x9c: 2026 kbd_put_keysym('\n'); 2027 break; 2028 2029 default: 2030 if (control) { 2031 kbd_put_keysym(sym & 0x1f); 2032 } else { 2033 kbd_put_keysym(sym); 2034 } 2035 break; 2036 } 2037 } 2038 } 2039 } 2040 2041 static const char *code2name(int keycode) 2042 { 2043 return QKeyCode_str(qemu_input_key_number_to_qcode(keycode)); 2044 } 2045 2046 static void key_event(VncState *vs, int down, uint32_t sym) 2047 { 2048 int keycode; 2049 int lsym = sym; 2050 2051 if (lsym >= 'A' && lsym <= 'Z' && qemu_console_is_graphic(NULL)) { 2052 lsym = lsym - 'A' + 'a'; 2053 } 2054 2055 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF, 2056 vs->vd->kbd, down) & SCANCODE_KEYMASK; 2057 trace_vnc_key_event_map(down, sym, keycode, code2name(keycode)); 2058 do_key_event(vs, down, keycode, sym); 2059 } 2060 2061 static void ext_key_event(VncState *vs, int down, 2062 uint32_t sym, uint16_t keycode) 2063 { 2064 /* if the user specifies a keyboard layout, always use it */ 2065 if (keyboard_layout) { 2066 key_event(vs, down, sym); 2067 } else { 2068 trace_vnc_key_event_ext(down, sym, keycode, code2name(keycode)); 2069 do_key_event(vs, down, keycode, sym); 2070 } 2071 } 2072 2073 static void framebuffer_update_request(VncState *vs, int incremental, 2074 int x, int y, int w, int h) 2075 { 2076 if (incremental) { 2077 if (vs->update != VNC_STATE_UPDATE_FORCE) { 2078 vs->update = VNC_STATE_UPDATE_INCREMENTAL; 2079 } 2080 } else { 2081 vs->update = VNC_STATE_UPDATE_FORCE; 2082 vnc_set_area_dirty(vs->dirty, vs->vd, x, y, w, h); 2083 if (vnc_has_feature(vs, VNC_FEATURE_RESIZE_EXT)) { 2084 vnc_desktop_resize_ext(vs, 0); 2085 } 2086 } 2087 } 2088 2089 static void send_ext_key_event_ack(VncState *vs) 2090 { 2091 vnc_lock_output(vs); 2092 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2093 vnc_write_u8(vs, 0); 2094 vnc_write_u16(vs, 1); 2095 vnc_framebuffer_update(vs, 0, 0, 2096 pixman_image_get_width(vs->vd->server), 2097 pixman_image_get_height(vs->vd->server), 2098 VNC_ENCODING_EXT_KEY_EVENT); 2099 vnc_unlock_output(vs); 2100 vnc_flush(vs); 2101 } 2102 2103 static void send_ext_audio_ack(VncState *vs) 2104 { 2105 vnc_lock_output(vs); 2106 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2107 vnc_write_u8(vs, 0); 2108 vnc_write_u16(vs, 1); 2109 vnc_framebuffer_update(vs, 0, 0, 2110 pixman_image_get_width(vs->vd->server), 2111 pixman_image_get_height(vs->vd->server), 2112 VNC_ENCODING_AUDIO); 2113 vnc_unlock_output(vs); 2114 vnc_flush(vs); 2115 } 2116 2117 static void send_xvp_message(VncState *vs, int code) 2118 { 2119 vnc_lock_output(vs); 2120 vnc_write_u8(vs, VNC_MSG_SERVER_XVP); 2121 vnc_write_u8(vs, 0); /* pad */ 2122 vnc_write_u8(vs, 1); /* version */ 2123 vnc_write_u8(vs, code); 2124 vnc_unlock_output(vs); 2125 vnc_flush(vs); 2126 } 2127 2128 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) 2129 { 2130 int i; 2131 unsigned int enc = 0; 2132 2133 vs->features = 0; 2134 vs->vnc_encoding = 0; 2135 vs->tight->compression = 9; 2136 vs->tight->quality = -1; /* Lossless by default */ 2137 vs->absolute = -1; 2138 2139 /* 2140 * Start from the end because the encodings are sent in order of preference. 2141 * This way the preferred encoding (first encoding defined in the array) 2142 * will be set at the end of the loop. 2143 */ 2144 for (i = n_encodings - 1; i >= 0; i--) { 2145 enc = encodings[i]; 2146 switch (enc) { 2147 case VNC_ENCODING_RAW: 2148 vs->vnc_encoding = enc; 2149 break; 2150 case VNC_ENCODING_HEXTILE: 2151 vs->features |= VNC_FEATURE_HEXTILE_MASK; 2152 vs->vnc_encoding = enc; 2153 break; 2154 case VNC_ENCODING_TIGHT: 2155 vs->features |= VNC_FEATURE_TIGHT_MASK; 2156 vs->vnc_encoding = enc; 2157 break; 2158 #ifdef CONFIG_PNG 2159 case VNC_ENCODING_TIGHT_PNG: 2160 vs->features |= VNC_FEATURE_TIGHT_PNG_MASK; 2161 vs->vnc_encoding = enc; 2162 break; 2163 #endif 2164 case VNC_ENCODING_ZLIB: 2165 /* 2166 * VNC_ENCODING_ZRLE compresses better than VNC_ENCODING_ZLIB. 2167 * So prioritize ZRLE, even if the client hints that it prefers 2168 * ZLIB. 2169 */ 2170 if ((vs->features & VNC_FEATURE_ZRLE_MASK) == 0) { 2171 vs->features |= VNC_FEATURE_ZLIB_MASK; 2172 vs->vnc_encoding = enc; 2173 } 2174 break; 2175 case VNC_ENCODING_ZRLE: 2176 vs->features |= VNC_FEATURE_ZRLE_MASK; 2177 vs->vnc_encoding = enc; 2178 break; 2179 case VNC_ENCODING_ZYWRLE: 2180 vs->features |= VNC_FEATURE_ZYWRLE_MASK; 2181 vs->vnc_encoding = enc; 2182 break; 2183 case VNC_ENCODING_DESKTOPRESIZE: 2184 vs->features |= VNC_FEATURE_RESIZE_MASK; 2185 break; 2186 case VNC_ENCODING_DESKTOP_RESIZE_EXT: 2187 vs->features |= VNC_FEATURE_RESIZE_EXT_MASK; 2188 break; 2189 case VNC_ENCODING_POINTER_TYPE_CHANGE: 2190 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK; 2191 break; 2192 case VNC_ENCODING_RICH_CURSOR: 2193 vs->features |= VNC_FEATURE_RICH_CURSOR_MASK; 2194 break; 2195 case VNC_ENCODING_ALPHA_CURSOR: 2196 vs->features |= VNC_FEATURE_ALPHA_CURSOR_MASK; 2197 break; 2198 case VNC_ENCODING_EXT_KEY_EVENT: 2199 send_ext_key_event_ack(vs); 2200 break; 2201 case VNC_ENCODING_AUDIO: 2202 send_ext_audio_ack(vs); 2203 break; 2204 case VNC_ENCODING_WMVi: 2205 vs->features |= VNC_FEATURE_WMVI_MASK; 2206 break; 2207 case VNC_ENCODING_LED_STATE: 2208 vs->features |= VNC_FEATURE_LED_STATE_MASK; 2209 break; 2210 case VNC_ENCODING_XVP: 2211 if (vs->vd->power_control) { 2212 vs->features |= VNC_FEATURE_XVP; 2213 send_xvp_message(vs, VNC_XVP_CODE_INIT); 2214 } 2215 break; 2216 case VNC_ENCODING_CLIPBOARD_EXT: 2217 vs->features |= VNC_FEATURE_CLIPBOARD_EXT_MASK; 2218 vnc_server_cut_text_caps(vs); 2219 break; 2220 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9: 2221 vs->tight->compression = (enc & 0x0F); 2222 break; 2223 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9: 2224 if (vs->vd->lossy) { 2225 vs->tight->quality = (enc & 0x0F); 2226 } 2227 break; 2228 default: 2229 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); 2230 break; 2231 } 2232 } 2233 vnc_desktop_resize(vs); 2234 check_pointer_type_change(&vs->mouse_mode_notifier, NULL); 2235 vnc_led_state_change(vs); 2236 vnc_cursor_define(vs); 2237 } 2238 2239 static void set_pixel_conversion(VncState *vs) 2240 { 2241 pixman_format_code_t fmt = qemu_pixman_get_format(&vs->client_pf); 2242 2243 if (fmt == VNC_SERVER_FB_FORMAT) { 2244 vs->write_pixels = vnc_write_pixels_copy; 2245 vnc_hextile_set_pixel_conversion(vs, 0); 2246 } else { 2247 vs->write_pixels = vnc_write_pixels_generic; 2248 vnc_hextile_set_pixel_conversion(vs, 1); 2249 } 2250 } 2251 2252 static void send_color_map(VncState *vs) 2253 { 2254 int i; 2255 2256 vnc_lock_output(vs); 2257 vnc_write_u8(vs, VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES); 2258 vnc_write_u8(vs, 0); /* padding */ 2259 vnc_write_u16(vs, 0); /* first color */ 2260 vnc_write_u16(vs, 256); /* # of colors */ 2261 2262 for (i = 0; i < 256; i++) { 2263 PixelFormat *pf = &vs->client_pf; 2264 2265 vnc_write_u16(vs, (((i >> pf->rshift) & pf->rmax) << (16 - pf->rbits))); 2266 vnc_write_u16(vs, (((i >> pf->gshift) & pf->gmax) << (16 - pf->gbits))); 2267 vnc_write_u16(vs, (((i >> pf->bshift) & pf->bmax) << (16 - pf->bbits))); 2268 } 2269 vnc_unlock_output(vs); 2270 } 2271 2272 static void set_pixel_format(VncState *vs, int bits_per_pixel, 2273 int big_endian_flag, int true_color_flag, 2274 int red_max, int green_max, int blue_max, 2275 int red_shift, int green_shift, int blue_shift) 2276 { 2277 if (!true_color_flag) { 2278 /* Expose a reasonable default 256 color map */ 2279 bits_per_pixel = 8; 2280 red_max = 7; 2281 green_max = 7; 2282 blue_max = 3; 2283 red_shift = 0; 2284 green_shift = 3; 2285 blue_shift = 6; 2286 } 2287 2288 switch (bits_per_pixel) { 2289 case 8: 2290 case 16: 2291 case 32: 2292 break; 2293 default: 2294 vnc_client_error(vs); 2295 return; 2296 } 2297 2298 vs->client_pf.rmax = red_max ? red_max : 0xFF; 2299 vs->client_pf.rbits = ctpopl(red_max); 2300 vs->client_pf.rshift = red_shift; 2301 vs->client_pf.rmask = red_max << red_shift; 2302 vs->client_pf.gmax = green_max ? green_max : 0xFF; 2303 vs->client_pf.gbits = ctpopl(green_max); 2304 vs->client_pf.gshift = green_shift; 2305 vs->client_pf.gmask = green_max << green_shift; 2306 vs->client_pf.bmax = blue_max ? blue_max : 0xFF; 2307 vs->client_pf.bbits = ctpopl(blue_max); 2308 vs->client_pf.bshift = blue_shift; 2309 vs->client_pf.bmask = blue_max << blue_shift; 2310 vs->client_pf.bits_per_pixel = bits_per_pixel; 2311 vs->client_pf.bytes_per_pixel = bits_per_pixel / 8; 2312 vs->client_pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel; 2313 vs->client_be = big_endian_flag; 2314 2315 if (!true_color_flag) { 2316 send_color_map(vs); 2317 } 2318 2319 set_pixel_conversion(vs); 2320 2321 graphic_hw_invalidate(vs->vd->dcl.con); 2322 graphic_hw_update(vs->vd->dcl.con); 2323 } 2324 2325 static void pixel_format_message (VncState *vs) { 2326 char pad[3] = { 0, 0, 0 }; 2327 2328 vs->client_pf = qemu_default_pixelformat(32); 2329 2330 vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */ 2331 vnc_write_u8(vs, vs->client_pf.depth); /* depth */ 2332 2333 #if HOST_BIG_ENDIAN 2334 vnc_write_u8(vs, 1); /* big-endian-flag */ 2335 #else 2336 vnc_write_u8(vs, 0); /* big-endian-flag */ 2337 #endif 2338 vnc_write_u8(vs, 1); /* true-color-flag */ 2339 vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */ 2340 vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */ 2341 vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */ 2342 vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */ 2343 vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */ 2344 vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */ 2345 vnc_write(vs, pad, 3); /* padding */ 2346 2347 vnc_hextile_set_pixel_conversion(vs, 0); 2348 vs->write_pixels = vnc_write_pixels_copy; 2349 } 2350 2351 static void vnc_colordepth(VncState *vs) 2352 { 2353 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) { 2354 /* Sending a WMVi message to notify the client*/ 2355 vnc_lock_output(vs); 2356 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE); 2357 vnc_write_u8(vs, 0); 2358 vnc_write_u16(vs, 1); /* number of rects */ 2359 vnc_framebuffer_update(vs, 0, 0, 2360 vs->client_width, 2361 vs->client_height, 2362 VNC_ENCODING_WMVi); 2363 pixel_format_message(vs); 2364 vnc_unlock_output(vs); 2365 vnc_flush(vs); 2366 } else { 2367 set_pixel_conversion(vs); 2368 } 2369 } 2370 2371 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) 2372 { 2373 int i; 2374 uint16_t limit; 2375 uint32_t freq; 2376 VncDisplay *vd = vs->vd; 2377 2378 if (data[0] > 3) { 2379 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 2380 } 2381 2382 switch (data[0]) { 2383 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT: 2384 if (len == 1) 2385 return 20; 2386 2387 set_pixel_format(vs, read_u8(data, 4), 2388 read_u8(data, 6), read_u8(data, 7), 2389 read_u16(data, 8), read_u16(data, 10), 2390 read_u16(data, 12), read_u8(data, 14), 2391 read_u8(data, 15), read_u8(data, 16)); 2392 break; 2393 case VNC_MSG_CLIENT_SET_ENCODINGS: 2394 if (len == 1) 2395 return 4; 2396 2397 if (len == 4) { 2398 limit = read_u16(data, 2); 2399 if (limit > 0) 2400 return 4 + (limit * 4); 2401 } else 2402 limit = read_u16(data, 2); 2403 2404 for (i = 0; i < limit; i++) { 2405 int32_t val = read_s32(data, 4 + (i * 4)); 2406 memcpy(data + 4 + (i * 4), &val, sizeof(val)); 2407 } 2408 2409 set_encodings(vs, (int32_t *)(data + 4), limit); 2410 break; 2411 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST: 2412 if (len == 1) 2413 return 10; 2414 2415 framebuffer_update_request(vs, 2416 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), 2417 read_u16(data, 6), read_u16(data, 8)); 2418 break; 2419 case VNC_MSG_CLIENT_KEY_EVENT: 2420 if (len == 1) 2421 return 8; 2422 2423 key_event(vs, read_u8(data, 1), read_u32(data, 4)); 2424 break; 2425 case VNC_MSG_CLIENT_POINTER_EVENT: 2426 if (len == 1) 2427 return 6; 2428 2429 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); 2430 break; 2431 case VNC_MSG_CLIENT_CUT_TEXT: 2432 if (len == 1) { 2433 return 8; 2434 } 2435 uint32_t dlen = abs(read_s32(data, 4)); 2436 if (len == 8) { 2437 if (dlen > (1 << 20)) { 2438 error_report("vnc: client_cut_text msg payload has %u bytes" 2439 " which exceeds our limit of 1MB.", dlen); 2440 vnc_client_error(vs); 2441 break; 2442 } 2443 if (dlen > 0) { 2444 return 8 + dlen; 2445 } 2446 } 2447 2448 if (read_s32(data, 4) < 0) { 2449 if (dlen < 4) { 2450 error_report("vnc: malformed payload (header less than 4 bytes)" 2451 " in extended clipboard pseudo-encoding."); 2452 vnc_client_error(vs); 2453 break; 2454 } 2455 vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12); 2456 break; 2457 } 2458 vnc_client_cut_text(vs, read_u32(data, 4), data + 8); 2459 break; 2460 case VNC_MSG_CLIENT_XVP: 2461 if (!(vs->features & VNC_FEATURE_XVP)) { 2462 error_report("vnc: xvp client message while disabled"); 2463 vnc_client_error(vs); 2464 break; 2465 } 2466 if (len == 1) { 2467 return 4; 2468 } 2469 if (len == 4) { 2470 uint8_t version = read_u8(data, 2); 2471 uint8_t action = read_u8(data, 3); 2472 2473 if (version != 1) { 2474 error_report("vnc: xvp client message version %d != 1", 2475 version); 2476 vnc_client_error(vs); 2477 break; 2478 } 2479 2480 switch (action) { 2481 case VNC_XVP_ACTION_SHUTDOWN: 2482 qemu_system_powerdown_request(); 2483 break; 2484 case VNC_XVP_ACTION_REBOOT: 2485 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2486 break; 2487 case VNC_XVP_ACTION_RESET: 2488 qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET); 2489 break; 2490 default: 2491 send_xvp_message(vs, VNC_XVP_CODE_FAIL); 2492 break; 2493 } 2494 } 2495 break; 2496 case VNC_MSG_CLIENT_QEMU: 2497 if (len == 1) 2498 return 2; 2499 2500 switch (read_u8(data, 1)) { 2501 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT: 2502 if (len == 2) 2503 return 12; 2504 2505 ext_key_event(vs, read_u16(data, 2), 2506 read_u32(data, 4), read_u32(data, 8)); 2507 break; 2508 case VNC_MSG_CLIENT_QEMU_AUDIO: 2509 if (len == 2) 2510 return 4; 2511 2512 switch (read_u16 (data, 2)) { 2513 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE: 2514 trace_vnc_msg_client_audio_enable(vs, vs->ioc); 2515 audio_add(vs); 2516 break; 2517 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE: 2518 trace_vnc_msg_client_audio_disable(vs, vs->ioc); 2519 audio_del(vs); 2520 break; 2521 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT: 2522 if (len == 4) 2523 return 10; 2524 switch (read_u8(data, 4)) { 2525 case 0: vs->as.fmt = AUDIO_FORMAT_U8; break; 2526 case 1: vs->as.fmt = AUDIO_FORMAT_S8; break; 2527 case 2: vs->as.fmt = AUDIO_FORMAT_U16; break; 2528 case 3: vs->as.fmt = AUDIO_FORMAT_S16; break; 2529 case 4: vs->as.fmt = AUDIO_FORMAT_U32; break; 2530 case 5: vs->as.fmt = AUDIO_FORMAT_S32; break; 2531 default: 2532 VNC_DEBUG("Invalid audio format %d\n", read_u8(data, 4)); 2533 vnc_client_error(vs); 2534 break; 2535 } 2536 vs->as.nchannels = read_u8(data, 5); 2537 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { 2538 VNC_DEBUG("Invalid audio channel count %d\n", 2539 read_u8(data, 5)); 2540 vnc_client_error(vs); 2541 break; 2542 } 2543 freq = read_u32(data, 6); 2544 /* No official limit for protocol, but 48khz is a sensible 2545 * upper bound for trustworthy clients, and this limit 2546 * protects calculations involving 'vs->as.freq' later. 2547 */ 2548 if (freq > 48000) { 2549 VNC_DEBUG("Invalid audio frequency %u > 48000", freq); 2550 vnc_client_error(vs); 2551 break; 2552 } 2553 vs->as.freq = freq; 2554 trace_vnc_msg_client_audio_format( 2555 vs, vs->ioc, vs->as.fmt, vs->as.nchannels, vs->as.freq); 2556 break; 2557 default: 2558 VNC_DEBUG("Invalid audio message %d\n", read_u8(data, 4)); 2559 vnc_client_error(vs); 2560 break; 2561 } 2562 break; 2563 2564 default: 2565 VNC_DEBUG("Msg: %d\n", read_u16(data, 0)); 2566 vnc_client_error(vs); 2567 break; 2568 } 2569 break; 2570 case VNC_MSG_CLIENT_SET_DESKTOP_SIZE: 2571 { 2572 size_t size; 2573 uint8_t screens; 2574 int w, h; 2575 2576 if (len < 8) { 2577 return 8; 2578 } 2579 2580 screens = read_u8(data, 6); 2581 size = 8 + screens * 16; 2582 if (len < size) { 2583 return size; 2584 } 2585 w = read_u16(data, 2); 2586 h = read_u16(data, 4); 2587 2588 trace_vnc_msg_client_set_desktop_size(vs, vs->ioc, w, h, screens); 2589 if (dpy_ui_info_supported(vs->vd->dcl.con)) { 2590 QemuUIInfo info; 2591 memset(&info, 0, sizeof(info)); 2592 info.width = w; 2593 info.height = h; 2594 dpy_set_ui_info(vs->vd->dcl.con, &info, false); 2595 vnc_desktop_resize_ext(vs, 4 /* Request forwarded */); 2596 } else { 2597 vnc_desktop_resize_ext(vs, 3 /* Invalid screen layout */); 2598 } 2599 2600 break; 2601 } 2602 default: 2603 VNC_DEBUG("Msg: %d\n", data[0]); 2604 vnc_client_error(vs); 2605 break; 2606 } 2607 2608 vnc_update_throttle_offset(vs); 2609 vnc_read_when(vs, protocol_client_msg, 1); 2610 return 0; 2611 } 2612 2613 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) 2614 { 2615 char buf[1024]; 2616 VncShareMode mode; 2617 int size; 2618 2619 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE; 2620 switch (vs->vd->share_policy) { 2621 case VNC_SHARE_POLICY_IGNORE: 2622 /* 2623 * Ignore the shared flag. Nothing to do here. 2624 * 2625 * Doesn't conform to the rfb spec but is traditional qemu 2626 * behavior, thus left here as option for compatibility 2627 * reasons. 2628 */ 2629 break; 2630 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE: 2631 /* 2632 * Policy: Allow clients ask for exclusive access. 2633 * 2634 * Implementation: When a client asks for exclusive access, 2635 * disconnect all others. Shared connects are allowed as long 2636 * as no exclusive connection exists. 2637 * 2638 * This is how the rfb spec suggests to handle the shared flag. 2639 */ 2640 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2641 VncState *client; 2642 QTAILQ_FOREACH(client, &vs->vd->clients, next) { 2643 if (vs == client) { 2644 continue; 2645 } 2646 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE && 2647 client->share_mode != VNC_SHARE_MODE_SHARED) { 2648 continue; 2649 } 2650 vnc_disconnect_start(client); 2651 } 2652 } 2653 if (mode == VNC_SHARE_MODE_SHARED) { 2654 if (vs->vd->num_exclusive > 0) { 2655 vnc_disconnect_start(vs); 2656 return 0; 2657 } 2658 } 2659 break; 2660 case VNC_SHARE_POLICY_FORCE_SHARED: 2661 /* 2662 * Policy: Shared connects only. 2663 * Implementation: Disallow clients asking for exclusive access. 2664 * 2665 * Useful for shared desktop sessions where you don't want 2666 * someone forgetting to say -shared when running the vnc 2667 * client disconnect everybody else. 2668 */ 2669 if (mode == VNC_SHARE_MODE_EXCLUSIVE) { 2670 vnc_disconnect_start(vs); 2671 return 0; 2672 } 2673 break; 2674 } 2675 vnc_set_share_mode(vs, mode); 2676 2677 if (vs->vd->num_shared > vs->vd->connections_limit) { 2678 vnc_disconnect_start(vs); 2679 return 0; 2680 } 2681 2682 assert(pixman_image_get_width(vs->vd->server) < 65536 && 2683 pixman_image_get_width(vs->vd->server) >= 0); 2684 assert(pixman_image_get_height(vs->vd->server) < 65536 && 2685 pixman_image_get_height(vs->vd->server) >= 0); 2686 vs->client_width = pixman_image_get_width(vs->vd->server); 2687 vs->client_height = pixman_image_get_height(vs->vd->server); 2688 vnc_write_u16(vs, vs->client_width); 2689 vnc_write_u16(vs, vs->client_height); 2690 2691 pixel_format_message(vs); 2692 2693 if (qemu_name) { 2694 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); 2695 if (size > sizeof(buf)) { 2696 size = sizeof(buf); 2697 } 2698 } else { 2699 size = snprintf(buf, sizeof(buf), "QEMU"); 2700 } 2701 2702 vnc_write_u32(vs, size); 2703 vnc_write(vs, buf, size); 2704 vnc_flush(vs); 2705 2706 vnc_client_cache_auth(vs); 2707 vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED); 2708 2709 vnc_read_when(vs, protocol_client_msg, 1); 2710 2711 return 0; 2712 } 2713 2714 void start_client_init(VncState *vs) 2715 { 2716 vnc_read_when(vs, protocol_client_init, 1); 2717 } 2718 2719 static void authentication_failed(VncState *vs) 2720 { 2721 vnc_write_u32(vs, 1); /* Reject auth */ 2722 if (vs->minor >= 8) { 2723 static const char err[] = "Authentication failed"; 2724 vnc_write_u32(vs, sizeof(err)); 2725 vnc_write(vs, err, sizeof(err)); 2726 } 2727 vnc_flush(vs); 2728 vnc_client_error(vs); 2729 } 2730 2731 static void 2732 vnc_munge_des_rfb_key(unsigned char *key, size_t nkey) 2733 { 2734 size_t i; 2735 for (i = 0; i < nkey; i++) { 2736 uint8_t r = key[i]; 2737 r = (r & 0xf0) >> 4 | (r & 0x0f) << 4; 2738 r = (r & 0xcc) >> 2 | (r & 0x33) << 2; 2739 r = (r & 0xaa) >> 1 | (r & 0x55) << 1; 2740 key[i] = r; 2741 } 2742 } 2743 2744 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) 2745 { 2746 unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; 2747 size_t i, pwlen; 2748 unsigned char key[8]; 2749 time_t now = time(NULL); 2750 QCryptoCipher *cipher = NULL; 2751 Error *err = NULL; 2752 2753 if (!vs->vd->password) { 2754 trace_vnc_auth_fail(vs, vs->auth, "password is not set", ""); 2755 goto reject; 2756 } 2757 if (vs->vd->expires < now) { 2758 trace_vnc_auth_fail(vs, vs->auth, "password is expired", ""); 2759 goto reject; 2760 } 2761 2762 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); 2763 2764 /* Calculate the expected challenge response */ 2765 pwlen = strlen(vs->vd->password); 2766 for (i=0; i<sizeof(key); i++) 2767 key[i] = i<pwlen ? vs->vd->password[i] : 0; 2768 vnc_munge_des_rfb_key(key, sizeof(key)); 2769 2770 cipher = qcrypto_cipher_new( 2771 QCRYPTO_CIPHER_ALG_DES, 2772 QCRYPTO_CIPHER_MODE_ECB, 2773 key, G_N_ELEMENTS(key), 2774 &err); 2775 if (!cipher) { 2776 trace_vnc_auth_fail(vs, vs->auth, "cannot create cipher", 2777 error_get_pretty(err)); 2778 error_free(err); 2779 goto reject; 2780 } 2781 2782 if (qcrypto_cipher_encrypt(cipher, 2783 vs->challenge, 2784 response, 2785 VNC_AUTH_CHALLENGE_SIZE, 2786 &err) < 0) { 2787 trace_vnc_auth_fail(vs, vs->auth, "cannot encrypt challenge response", 2788 error_get_pretty(err)); 2789 error_free(err); 2790 goto reject; 2791 } 2792 2793 /* Compare expected vs actual challenge response */ 2794 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { 2795 trace_vnc_auth_fail(vs, vs->auth, "mis-matched challenge response", ""); 2796 goto reject; 2797 } else { 2798 trace_vnc_auth_pass(vs, vs->auth); 2799 vnc_write_u32(vs, 0); /* Accept auth */ 2800 vnc_flush(vs); 2801 2802 start_client_init(vs); 2803 } 2804 2805 qcrypto_cipher_free(cipher); 2806 return 0; 2807 2808 reject: 2809 authentication_failed(vs); 2810 qcrypto_cipher_free(cipher); 2811 return 0; 2812 } 2813 2814 void start_auth_vnc(VncState *vs) 2815 { 2816 Error *err = NULL; 2817 2818 if (qcrypto_random_bytes(vs->challenge, sizeof(vs->challenge), &err)) { 2819 trace_vnc_auth_fail(vs, vs->auth, "cannot get random bytes", 2820 error_get_pretty(err)); 2821 error_free(err); 2822 authentication_failed(vs); 2823 return; 2824 } 2825 2826 /* Send client a 'random' challenge */ 2827 vnc_write(vs, vs->challenge, sizeof(vs->challenge)); 2828 vnc_flush(vs); 2829 2830 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); 2831 } 2832 2833 2834 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) 2835 { 2836 /* We only advertise 1 auth scheme at a time, so client 2837 * must pick the one we sent. Verify this */ 2838 if (data[0] != vs->auth) { /* Reject auth */ 2839 trace_vnc_auth_reject(vs, vs->auth, (int)data[0]); 2840 authentication_failed(vs); 2841 } else { /* Accept requested auth */ 2842 trace_vnc_auth_start(vs, vs->auth); 2843 switch (vs->auth) { 2844 case VNC_AUTH_NONE: 2845 if (vs->minor >= 8) { 2846 vnc_write_u32(vs, 0); /* Accept auth completion */ 2847 vnc_flush(vs); 2848 } 2849 trace_vnc_auth_pass(vs, vs->auth); 2850 start_client_init(vs); 2851 break; 2852 2853 case VNC_AUTH_VNC: 2854 start_auth_vnc(vs); 2855 break; 2856 2857 case VNC_AUTH_VENCRYPT: 2858 start_auth_vencrypt(vs); 2859 break; 2860 2861 #ifdef CONFIG_VNC_SASL 2862 case VNC_AUTH_SASL: 2863 start_auth_sasl(vs); 2864 break; 2865 #endif /* CONFIG_VNC_SASL */ 2866 2867 default: /* Should not be possible, but just in case */ 2868 trace_vnc_auth_fail(vs, vs->auth, "Unhandled auth method", ""); 2869 authentication_failed(vs); 2870 } 2871 } 2872 return 0; 2873 } 2874 2875 static int protocol_version(VncState *vs, uint8_t *version, size_t len) 2876 { 2877 char local[13]; 2878 2879 memcpy(local, version, 12); 2880 local[12] = 0; 2881 2882 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { 2883 VNC_DEBUG("Malformed protocol version %s\n", local); 2884 vnc_client_error(vs); 2885 return 0; 2886 } 2887 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); 2888 if (vs->major != 3 || 2889 (vs->minor != 3 && 2890 vs->minor != 4 && 2891 vs->minor != 5 && 2892 vs->minor != 7 && 2893 vs->minor != 8)) { 2894 VNC_DEBUG("Unsupported client version\n"); 2895 vnc_write_u32(vs, VNC_AUTH_INVALID); 2896 vnc_flush(vs); 2897 vnc_client_error(vs); 2898 return 0; 2899 } 2900 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated 2901 * as equivalent to v3.3 by servers 2902 */ 2903 if (vs->minor == 4 || vs->minor == 5) 2904 vs->minor = 3; 2905 2906 if (vs->minor == 3) { 2907 trace_vnc_auth_start(vs, vs->auth); 2908 if (vs->auth == VNC_AUTH_NONE) { 2909 vnc_write_u32(vs, vs->auth); 2910 vnc_flush(vs); 2911 trace_vnc_auth_pass(vs, vs->auth); 2912 start_client_init(vs); 2913 } else if (vs->auth == VNC_AUTH_VNC) { 2914 VNC_DEBUG("Tell client VNC auth\n"); 2915 vnc_write_u32(vs, vs->auth); 2916 vnc_flush(vs); 2917 start_auth_vnc(vs); 2918 } else { 2919 trace_vnc_auth_fail(vs, vs->auth, 2920 "Unsupported auth method for v3.3", ""); 2921 vnc_write_u32(vs, VNC_AUTH_INVALID); 2922 vnc_flush(vs); 2923 vnc_client_error(vs); 2924 } 2925 } else { 2926 vnc_write_u8(vs, 1); /* num auth */ 2927 vnc_write_u8(vs, vs->auth); 2928 vnc_read_when(vs, protocol_client_auth, 1); 2929 vnc_flush(vs); 2930 } 2931 2932 return 0; 2933 } 2934 2935 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y) 2936 { 2937 struct VncSurface *vs = &vd->guest; 2938 2939 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT]; 2940 } 2941 2942 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h) 2943 { 2944 int i, j; 2945 2946 w = (x + w) / VNC_STAT_RECT; 2947 h = (y + h) / VNC_STAT_RECT; 2948 x /= VNC_STAT_RECT; 2949 y /= VNC_STAT_RECT; 2950 2951 for (j = y; j <= h; j++) { 2952 for (i = x; i <= w; i++) { 2953 vs->lossy_rect[j][i] = 1; 2954 } 2955 } 2956 } 2957 2958 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y) 2959 { 2960 VncState *vs; 2961 int sty = y / VNC_STAT_RECT; 2962 int stx = x / VNC_STAT_RECT; 2963 int has_dirty = 0; 2964 2965 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 2966 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 2967 2968 QTAILQ_FOREACH(vs, &vd->clients, next) { 2969 int j; 2970 2971 /* kernel send buffers are full -> refresh later */ 2972 if (vs->output.offset) { 2973 continue; 2974 } 2975 2976 if (!vs->lossy_rect[sty][stx]) { 2977 continue; 2978 } 2979 2980 vs->lossy_rect[sty][stx] = 0; 2981 for (j = 0; j < VNC_STAT_RECT; ++j) { 2982 bitmap_set(vs->dirty[y + j], 2983 x / VNC_DIRTY_PIXELS_PER_BIT, 2984 VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT); 2985 } 2986 has_dirty++; 2987 } 2988 2989 return has_dirty; 2990 } 2991 2992 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv) 2993 { 2994 int width = MIN(pixman_image_get_width(vd->guest.fb), 2995 pixman_image_get_width(vd->server)); 2996 int height = MIN(pixman_image_get_height(vd->guest.fb), 2997 pixman_image_get_height(vd->server)); 2998 int x, y; 2999 struct timeval res; 3000 int has_dirty = 0; 3001 3002 for (y = 0; y < height; y += VNC_STAT_RECT) { 3003 for (x = 0; x < width; x += VNC_STAT_RECT) { 3004 VncRectStat *rect = vnc_stat_rect(vd, x, y); 3005 3006 rect->updated = false; 3007 } 3008 } 3009 3010 qemu_timersub(tv, &VNC_REFRESH_STATS, &res); 3011 3012 if (timercmp(&vd->guest.last_freq_check, &res, >)) { 3013 return has_dirty; 3014 } 3015 vd->guest.last_freq_check = *tv; 3016 3017 for (y = 0; y < height; y += VNC_STAT_RECT) { 3018 for (x = 0; x < width; x += VNC_STAT_RECT) { 3019 VncRectStat *rect= vnc_stat_rect(vd, x, y); 3020 int count = ARRAY_SIZE(rect->times); 3021 struct timeval min, max; 3022 3023 if (!timerisset(&rect->times[count - 1])) { 3024 continue ; 3025 } 3026 3027 max = rect->times[(rect->idx + count - 1) % count]; 3028 qemu_timersub(tv, &max, &res); 3029 3030 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) { 3031 rect->freq = 0; 3032 has_dirty += vnc_refresh_lossy_rect(vd, x, y); 3033 memset(rect->times, 0, sizeof (rect->times)); 3034 continue ; 3035 } 3036 3037 min = rect->times[rect->idx]; 3038 max = rect->times[(rect->idx + count - 1) % count]; 3039 qemu_timersub(&max, &min, &res); 3040 3041 rect->freq = res.tv_sec + res.tv_usec / 1000000.; 3042 rect->freq /= count; 3043 rect->freq = 1. / rect->freq; 3044 } 3045 } 3046 return has_dirty; 3047 } 3048 3049 double vnc_update_freq(VncState *vs, int x, int y, int w, int h) 3050 { 3051 int i, j; 3052 double total = 0; 3053 int num = 0; 3054 3055 x = QEMU_ALIGN_DOWN(x, VNC_STAT_RECT); 3056 y = QEMU_ALIGN_DOWN(y, VNC_STAT_RECT); 3057 3058 for (j = y; j <= y + h; j += VNC_STAT_RECT) { 3059 for (i = x; i <= x + w; i += VNC_STAT_RECT) { 3060 total += vnc_stat_rect(vs->vd, i, j)->freq; 3061 num++; 3062 } 3063 } 3064 3065 if (num) { 3066 return total / num; 3067 } else { 3068 return 0; 3069 } 3070 } 3071 3072 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv) 3073 { 3074 VncRectStat *rect; 3075 3076 rect = vnc_stat_rect(vd, x, y); 3077 if (rect->updated) { 3078 return; 3079 } 3080 rect->times[rect->idx] = *tv; 3081 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times); 3082 rect->updated = true; 3083 } 3084 3085 static int vnc_refresh_server_surface(VncDisplay *vd) 3086 { 3087 int width = MIN(pixman_image_get_width(vd->guest.fb), 3088 pixman_image_get_width(vd->server)); 3089 int height = MIN(pixman_image_get_height(vd->guest.fb), 3090 pixman_image_get_height(vd->server)); 3091 int cmp_bytes, server_stride, line_bytes, guest_ll, guest_stride, y = 0; 3092 uint8_t *guest_row0 = NULL, *server_row0; 3093 VncState *vs; 3094 int has_dirty = 0; 3095 pixman_image_t *tmpbuf = NULL; 3096 unsigned long offset; 3097 int x; 3098 uint8_t *guest_ptr, *server_ptr; 3099 3100 struct timeval tv = { 0, 0 }; 3101 3102 if (!vd->non_adaptive) { 3103 gettimeofday(&tv, NULL); 3104 has_dirty = vnc_update_stats(vd, &tv); 3105 } 3106 3107 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3108 height * VNC_DIRTY_BPL(&vd->guest), 0); 3109 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3110 /* no dirty bits in guest surface */ 3111 return has_dirty; 3112 } 3113 3114 /* 3115 * Walk through the guest dirty map. 3116 * Check and copy modified bits from guest to server surface. 3117 * Update server dirty map. 3118 */ 3119 server_row0 = (uint8_t *)pixman_image_get_data(vd->server); 3120 server_stride = guest_stride = guest_ll = 3121 pixman_image_get_stride(vd->server); 3122 cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES, 3123 server_stride); 3124 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3125 int width = pixman_image_get_width(vd->server); 3126 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width); 3127 } else { 3128 int guest_bpp = 3129 PIXMAN_FORMAT_BPP(pixman_image_get_format(vd->guest.fb)); 3130 guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb); 3131 guest_stride = pixman_image_get_stride(vd->guest.fb); 3132 guest_ll = pixman_image_get_width(vd->guest.fb) 3133 * DIV_ROUND_UP(guest_bpp, 8); 3134 } 3135 line_bytes = MIN(server_stride, guest_ll); 3136 3137 for (;;) { 3138 y = offset / VNC_DIRTY_BPL(&vd->guest); 3139 x = offset % VNC_DIRTY_BPL(&vd->guest); 3140 3141 server_ptr = server_row0 + y * server_stride + x * cmp_bytes; 3142 3143 if (vd->guest.format != VNC_SERVER_FB_FORMAT) { 3144 qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y); 3145 guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf); 3146 } else { 3147 guest_ptr = guest_row0 + y * guest_stride; 3148 } 3149 guest_ptr += x * cmp_bytes; 3150 3151 for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT); 3152 x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { 3153 int _cmp_bytes = cmp_bytes; 3154 if (!test_and_clear_bit(x, vd->guest.dirty[y])) { 3155 continue; 3156 } 3157 if ((x + 1) * cmp_bytes > line_bytes) { 3158 _cmp_bytes = line_bytes - x * cmp_bytes; 3159 } 3160 assert(_cmp_bytes >= 0); 3161 if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) { 3162 continue; 3163 } 3164 memcpy(server_ptr, guest_ptr, _cmp_bytes); 3165 if (!vd->non_adaptive) { 3166 vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT, 3167 y, &tv); 3168 } 3169 QTAILQ_FOREACH(vs, &vd->clients, next) { 3170 set_bit(x, vs->dirty[y]); 3171 } 3172 has_dirty++; 3173 } 3174 3175 y++; 3176 offset = find_next_bit((unsigned long *) &vd->guest.dirty, 3177 height * VNC_DIRTY_BPL(&vd->guest), 3178 y * VNC_DIRTY_BPL(&vd->guest)); 3179 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) { 3180 /* no more dirty bits */ 3181 break; 3182 } 3183 } 3184 qemu_pixman_image_unref(tmpbuf); 3185 return has_dirty; 3186 } 3187 3188 static void vnc_refresh(DisplayChangeListener *dcl) 3189 { 3190 VncDisplay *vd = container_of(dcl, VncDisplay, dcl); 3191 VncState *vs, *vn; 3192 int has_dirty, rects = 0; 3193 3194 if (QTAILQ_EMPTY(&vd->clients)) { 3195 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX); 3196 return; 3197 } 3198 3199 graphic_hw_update(vd->dcl.con); 3200 3201 if (vnc_trylock_display(vd)) { 3202 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3203 return; 3204 } 3205 3206 has_dirty = vnc_refresh_server_surface(vd); 3207 vnc_unlock_display(vd); 3208 3209 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { 3210 rects += vnc_update_client(vs, has_dirty); 3211 /* vs might be free()ed here */ 3212 } 3213 3214 if (has_dirty && rects) { 3215 vd->dcl.update_interval /= 2; 3216 if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) { 3217 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE; 3218 } 3219 } else { 3220 vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC; 3221 if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) { 3222 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX; 3223 } 3224 } 3225 } 3226 3227 static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc, 3228 bool skipauth, bool websocket) 3229 { 3230 VncState *vs = g_new0(VncState, 1); 3231 bool first_client = QTAILQ_EMPTY(&vd->clients); 3232 int i; 3233 3234 trace_vnc_client_connect(vs, sioc); 3235 vs->zrle = g_new0(VncZrle, 1); 3236 vs->tight = g_new0(VncTight, 1); 3237 vs->magic = VNC_MAGIC; 3238 vs->sioc = sioc; 3239 object_ref(OBJECT(vs->sioc)); 3240 vs->ioc = QIO_CHANNEL(sioc); 3241 object_ref(OBJECT(vs->ioc)); 3242 vs->vd = vd; 3243 3244 buffer_init(&vs->input, "vnc-input/%p", sioc); 3245 buffer_init(&vs->output, "vnc-output/%p", sioc); 3246 buffer_init(&vs->jobs_buffer, "vnc-jobs_buffer/%p", sioc); 3247 3248 buffer_init(&vs->tight->tight, "vnc-tight/%p", sioc); 3249 buffer_init(&vs->tight->zlib, "vnc-tight-zlib/%p", sioc); 3250 buffer_init(&vs->tight->gradient, "vnc-tight-gradient/%p", sioc); 3251 #ifdef CONFIG_VNC_JPEG 3252 buffer_init(&vs->tight->jpeg, "vnc-tight-jpeg/%p", sioc); 3253 #endif 3254 #ifdef CONFIG_PNG 3255 buffer_init(&vs->tight->png, "vnc-tight-png/%p", sioc); 3256 #endif 3257 buffer_init(&vs->zlib.zlib, "vnc-zlib/%p", sioc); 3258 buffer_init(&vs->zrle->zrle, "vnc-zrle/%p", sioc); 3259 buffer_init(&vs->zrle->fb, "vnc-zrle-fb/%p", sioc); 3260 buffer_init(&vs->zrle->zlib, "vnc-zrle-zlib/%p", sioc); 3261 3262 if (skipauth) { 3263 vs->auth = VNC_AUTH_NONE; 3264 vs->subauth = VNC_AUTH_INVALID; 3265 } else { 3266 if (websocket) { 3267 vs->auth = vd->ws_auth; 3268 vs->subauth = VNC_AUTH_INVALID; 3269 } else { 3270 vs->auth = vd->auth; 3271 vs->subauth = vd->subauth; 3272 } 3273 } 3274 VNC_DEBUG("Client sioc=%p ws=%d auth=%d subauth=%d\n", 3275 sioc, websocket, vs->auth, vs->subauth); 3276 3277 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect)); 3278 for (i = 0; i < VNC_STAT_ROWS; ++i) { 3279 vs->lossy_rect[i] = g_new0(uint8_t, VNC_STAT_COLS); 3280 } 3281 3282 VNC_DEBUG("New client on socket %p\n", vs->sioc); 3283 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE); 3284 qio_channel_set_blocking(vs->ioc, false, NULL); 3285 if (vs->ioc_tag) { 3286 g_source_remove(vs->ioc_tag); 3287 } 3288 if (websocket) { 3289 vs->websocket = 1; 3290 if (vd->tlscreds) { 3291 vs->ioc_tag = qio_channel_add_watch( 3292 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3293 vncws_tls_handshake_io, vs, NULL); 3294 } else { 3295 vs->ioc_tag = qio_channel_add_watch( 3296 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3297 vncws_handshake_io, vs, NULL); 3298 } 3299 } else { 3300 vs->ioc_tag = qio_channel_add_watch( 3301 vs->ioc, G_IO_IN | G_IO_HUP | G_IO_ERR, 3302 vnc_client_io, vs, NULL); 3303 } 3304 3305 vnc_client_cache_addr(vs); 3306 vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED); 3307 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING); 3308 3309 vs->last_x = -1; 3310 vs->last_y = -1; 3311 3312 vs->as.freq = 44100; 3313 vs->as.nchannels = 2; 3314 vs->as.fmt = AUDIO_FORMAT_S16; 3315 vs->as.endianness = 0; 3316 3317 qemu_mutex_init(&vs->output_mutex); 3318 vs->bh = qemu_bh_new(vnc_jobs_bh, vs); 3319 3320 QTAILQ_INSERT_TAIL(&vd->clients, vs, next); 3321 if (first_client) { 3322 vnc_update_server_surface(vd); 3323 } 3324 3325 graphic_hw_update(vd->dcl.con); 3326 3327 if (!vs->websocket) { 3328 vnc_start_protocol(vs); 3329 } 3330 3331 if (vd->num_connecting > vd->connections_limit) { 3332 QTAILQ_FOREACH(vs, &vd->clients, next) { 3333 if (vs->share_mode == VNC_SHARE_MODE_CONNECTING) { 3334 vnc_disconnect_start(vs); 3335 return; 3336 } 3337 } 3338 } 3339 } 3340 3341 void vnc_start_protocol(VncState *vs) 3342 { 3343 vnc_write(vs, "RFB 003.008\n", 12); 3344 vnc_flush(vs); 3345 vnc_read_when(vs, protocol_version, 12); 3346 3347 vs->mouse_mode_notifier.notify = check_pointer_type_change; 3348 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier); 3349 } 3350 3351 static void vnc_listen_io(QIONetListener *listener, 3352 QIOChannelSocket *cioc, 3353 void *opaque) 3354 { 3355 VncDisplay *vd = opaque; 3356 bool isWebsock = listener == vd->wslistener; 3357 3358 qio_channel_set_name(QIO_CHANNEL(cioc), 3359 isWebsock ? "vnc-ws-server" : "vnc-server"); 3360 qio_channel_set_delay(QIO_CHANNEL(cioc), false); 3361 vnc_connect(vd, cioc, false, isWebsock); 3362 } 3363 3364 static const DisplayChangeListenerOps dcl_ops = { 3365 .dpy_name = "vnc", 3366 .dpy_refresh = vnc_refresh, 3367 .dpy_gfx_update = vnc_dpy_update, 3368 .dpy_gfx_switch = vnc_dpy_switch, 3369 .dpy_gfx_check_format = qemu_pixman_check_format, 3370 .dpy_mouse_set = vnc_mouse_set, 3371 .dpy_cursor_define = vnc_dpy_cursor_define, 3372 }; 3373 3374 void vnc_display_init(const char *id, Error **errp) 3375 { 3376 VncDisplay *vd; 3377 3378 if (vnc_display_find(id) != NULL) { 3379 return; 3380 } 3381 vd = g_malloc0(sizeof(*vd)); 3382 3383 vd->id = strdup(id); 3384 QTAILQ_INSERT_TAIL(&vnc_displays, vd, next); 3385 3386 QTAILQ_INIT(&vd->clients); 3387 vd->expires = TIME_MAX; 3388 3389 if (keyboard_layout) { 3390 trace_vnc_key_map_init(keyboard_layout); 3391 vd->kbd_layout = init_keyboard_layout(name2keysym, 3392 keyboard_layout, errp); 3393 } else { 3394 vd->kbd_layout = init_keyboard_layout(name2keysym, "en-us", errp); 3395 } 3396 3397 if (!vd->kbd_layout) { 3398 return; 3399 } 3400 3401 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 3402 vd->connections_limit = 32; 3403 3404 qemu_mutex_init(&vd->mutex); 3405 vnc_start_worker_thread(); 3406 3407 vd->dcl.ops = &dcl_ops; 3408 register_displaychangelistener(&vd->dcl); 3409 vd->kbd = qkbd_state_init(vd->dcl.con); 3410 } 3411 3412 3413 static void vnc_display_close(VncDisplay *vd) 3414 { 3415 if (!vd) { 3416 return; 3417 } 3418 vd->is_unix = false; 3419 3420 if (vd->listener) { 3421 qio_net_listener_disconnect(vd->listener); 3422 object_unref(OBJECT(vd->listener)); 3423 } 3424 vd->listener = NULL; 3425 3426 if (vd->wslistener) { 3427 qio_net_listener_disconnect(vd->wslistener); 3428 object_unref(OBJECT(vd->wslistener)); 3429 } 3430 vd->wslistener = NULL; 3431 3432 vd->auth = VNC_AUTH_INVALID; 3433 vd->subauth = VNC_AUTH_INVALID; 3434 if (vd->tlscreds) { 3435 object_unref(OBJECT(vd->tlscreds)); 3436 vd->tlscreds = NULL; 3437 } 3438 if (vd->tlsauthz) { 3439 object_unparent(OBJECT(vd->tlsauthz)); 3440 vd->tlsauthz = NULL; 3441 } 3442 g_free(vd->tlsauthzid); 3443 vd->tlsauthzid = NULL; 3444 if (vd->lock_key_sync) { 3445 qemu_remove_led_event_handler(vd->led); 3446 vd->led = NULL; 3447 } 3448 #ifdef CONFIG_VNC_SASL 3449 if (vd->sasl.authz) { 3450 object_unparent(OBJECT(vd->sasl.authz)); 3451 vd->sasl.authz = NULL; 3452 } 3453 g_free(vd->sasl.authzid); 3454 vd->sasl.authzid = NULL; 3455 #endif 3456 } 3457 3458 int vnc_display_password(const char *id, const char *password) 3459 { 3460 VncDisplay *vd = vnc_display_find(id); 3461 3462 if (!vd) { 3463 return -EINVAL; 3464 } 3465 if (vd->auth == VNC_AUTH_NONE) { 3466 error_printf_unless_qmp("If you want use passwords please enable " 3467 "password auth using '-vnc ${dpy},password'.\n"); 3468 return -EINVAL; 3469 } 3470 3471 g_free(vd->password); 3472 vd->password = g_strdup(password); 3473 3474 return 0; 3475 } 3476 3477 int vnc_display_pw_expire(const char *id, time_t expires) 3478 { 3479 VncDisplay *vd = vnc_display_find(id); 3480 3481 if (!vd) { 3482 return -EINVAL; 3483 } 3484 3485 vd->expires = expires; 3486 return 0; 3487 } 3488 3489 static void vnc_display_print_local_addr(VncDisplay *vd) 3490 { 3491 SocketAddress *addr; 3492 3493 if (!vd->listener || !vd->listener->nsioc) { 3494 return; 3495 } 3496 3497 addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], NULL); 3498 if (!addr) { 3499 return; 3500 } 3501 3502 if (addr->type != SOCKET_ADDRESS_TYPE_INET) { 3503 qapi_free_SocketAddress(addr); 3504 return; 3505 } 3506 error_printf_unless_qmp("VNC server running on %s:%s\n", 3507 addr->u.inet.host, 3508 addr->u.inet.port); 3509 qapi_free_SocketAddress(addr); 3510 } 3511 3512 static QemuOptsList qemu_vnc_opts = { 3513 .name = "vnc", 3514 .head = QTAILQ_HEAD_INITIALIZER(qemu_vnc_opts.head), 3515 .implied_opt_name = "vnc", 3516 .desc = { 3517 { 3518 .name = "vnc", 3519 .type = QEMU_OPT_STRING, 3520 },{ 3521 .name = "websocket", 3522 .type = QEMU_OPT_STRING, 3523 },{ 3524 .name = "tls-creds", 3525 .type = QEMU_OPT_STRING, 3526 },{ 3527 .name = "share", 3528 .type = QEMU_OPT_STRING, 3529 },{ 3530 .name = "display", 3531 .type = QEMU_OPT_STRING, 3532 },{ 3533 .name = "head", 3534 .type = QEMU_OPT_NUMBER, 3535 },{ 3536 .name = "connections", 3537 .type = QEMU_OPT_NUMBER, 3538 },{ 3539 .name = "to", 3540 .type = QEMU_OPT_NUMBER, 3541 },{ 3542 .name = "ipv4", 3543 .type = QEMU_OPT_BOOL, 3544 },{ 3545 .name = "ipv6", 3546 .type = QEMU_OPT_BOOL, 3547 },{ 3548 .name = "password", 3549 .type = QEMU_OPT_BOOL, 3550 },{ 3551 .name = "password-secret", 3552 .type = QEMU_OPT_STRING, 3553 },{ 3554 .name = "reverse", 3555 .type = QEMU_OPT_BOOL, 3556 },{ 3557 .name = "lock-key-sync", 3558 .type = QEMU_OPT_BOOL, 3559 },{ 3560 .name = "key-delay-ms", 3561 .type = QEMU_OPT_NUMBER, 3562 },{ 3563 .name = "sasl", 3564 .type = QEMU_OPT_BOOL, 3565 },{ 3566 .name = "tls-authz", 3567 .type = QEMU_OPT_STRING, 3568 },{ 3569 .name = "sasl-authz", 3570 .type = QEMU_OPT_STRING, 3571 },{ 3572 .name = "lossy", 3573 .type = QEMU_OPT_BOOL, 3574 },{ 3575 .name = "non-adaptive", 3576 .type = QEMU_OPT_BOOL, 3577 },{ 3578 .name = "audiodev", 3579 .type = QEMU_OPT_STRING, 3580 },{ 3581 .name = "power-control", 3582 .type = QEMU_OPT_BOOL, 3583 }, 3584 { /* end of list */ } 3585 }, 3586 }; 3587 3588 3589 static int 3590 vnc_display_setup_auth(int *auth, 3591 int *subauth, 3592 QCryptoTLSCreds *tlscreds, 3593 bool password, 3594 bool sasl, 3595 bool websocket, 3596 Error **errp) 3597 { 3598 /* 3599 * We have a choice of 3 authentication options 3600 * 3601 * 1. none 3602 * 2. vnc 3603 * 3. sasl 3604 * 3605 * The channel can be run in 2 modes 3606 * 3607 * 1. clear 3608 * 2. tls 3609 * 3610 * And TLS can use 2 types of credentials 3611 * 3612 * 1. anon 3613 * 2. x509 3614 * 3615 * We thus have 9 possible logical combinations 3616 * 3617 * 1. clear + none 3618 * 2. clear + vnc 3619 * 3. clear + sasl 3620 * 4. tls + anon + none 3621 * 5. tls + anon + vnc 3622 * 6. tls + anon + sasl 3623 * 7. tls + x509 + none 3624 * 8. tls + x509 + vnc 3625 * 9. tls + x509 + sasl 3626 * 3627 * These need to be mapped into the VNC auth schemes 3628 * in an appropriate manner. In regular VNC, all the 3629 * TLS options get mapped into VNC_AUTH_VENCRYPT 3630 * sub-auth types. 3631 * 3632 * In websockets, the https:// protocol already provides 3633 * TLS support, so there is no need to make use of the 3634 * VeNCrypt extension. Furthermore, websockets browser 3635 * clients could not use VeNCrypt even if they wanted to, 3636 * as they cannot control when the TLS handshake takes 3637 * place. Thus there is no option but to rely on https://, 3638 * meaning combinations 4->6 and 7->9 will be mapped to 3639 * VNC auth schemes in the same way as combos 1->3. 3640 * 3641 * Regardless of fact that we have a different mapping to 3642 * VNC auth mechs for plain VNC vs websockets VNC, the end 3643 * result has the same security characteristics. 3644 */ 3645 if (websocket || !tlscreds) { 3646 if (password) { 3647 VNC_DEBUG("Initializing VNC server with password auth\n"); 3648 *auth = VNC_AUTH_VNC; 3649 } else if (sasl) { 3650 VNC_DEBUG("Initializing VNC server with SASL auth\n"); 3651 *auth = VNC_AUTH_SASL; 3652 } else { 3653 VNC_DEBUG("Initializing VNC server with no auth\n"); 3654 *auth = VNC_AUTH_NONE; 3655 } 3656 *subauth = VNC_AUTH_INVALID; 3657 } else { 3658 bool is_x509 = object_dynamic_cast(OBJECT(tlscreds), 3659 TYPE_QCRYPTO_TLS_CREDS_X509) != NULL; 3660 bool is_anon = object_dynamic_cast(OBJECT(tlscreds), 3661 TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL; 3662 3663 if (!is_x509 && !is_anon) { 3664 error_setg(errp, 3665 "Unsupported TLS cred type %s", 3666 object_get_typename(OBJECT(tlscreds))); 3667 return -1; 3668 } 3669 *auth = VNC_AUTH_VENCRYPT; 3670 if (password) { 3671 if (is_x509) { 3672 VNC_DEBUG("Initializing VNC server with x509 password auth\n"); 3673 *subauth = VNC_AUTH_VENCRYPT_X509VNC; 3674 } else { 3675 VNC_DEBUG("Initializing VNC server with TLS password auth\n"); 3676 *subauth = VNC_AUTH_VENCRYPT_TLSVNC; 3677 } 3678 3679 } else if (sasl) { 3680 if (is_x509) { 3681 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); 3682 *subauth = VNC_AUTH_VENCRYPT_X509SASL; 3683 } else { 3684 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); 3685 *subauth = VNC_AUTH_VENCRYPT_TLSSASL; 3686 } 3687 } else { 3688 if (is_x509) { 3689 VNC_DEBUG("Initializing VNC server with x509 no auth\n"); 3690 *subauth = VNC_AUTH_VENCRYPT_X509NONE; 3691 } else { 3692 VNC_DEBUG("Initializing VNC server with TLS no auth\n"); 3693 *subauth = VNC_AUTH_VENCRYPT_TLSNONE; 3694 } 3695 } 3696 } 3697 return 0; 3698 } 3699 3700 3701 static int vnc_display_get_address(const char *addrstr, 3702 bool websocket, 3703 bool reverse, 3704 int displaynum, 3705 int to, 3706 bool has_ipv4, 3707 bool has_ipv6, 3708 bool ipv4, 3709 bool ipv6, 3710 SocketAddress **retaddr, 3711 Error **errp) 3712 { 3713 int ret = -1; 3714 SocketAddress *addr = NULL; 3715 3716 addr = g_new0(SocketAddress, 1); 3717 3718 if (strncmp(addrstr, "unix:", 5) == 0) { 3719 addr->type = SOCKET_ADDRESS_TYPE_UNIX; 3720 addr->u.q_unix.path = g_strdup(addrstr + 5); 3721 3722 if (websocket) { 3723 error_setg(errp, "UNIX sockets not supported with websock"); 3724 goto cleanup; 3725 } 3726 3727 if (to) { 3728 error_setg(errp, "Port range not support with UNIX socket"); 3729 goto cleanup; 3730 } 3731 ret = 0; 3732 } else { 3733 const char *port; 3734 size_t hostlen; 3735 unsigned long long baseport = 0; 3736 InetSocketAddress *inet; 3737 3738 port = strrchr(addrstr, ':'); 3739 if (!port) { 3740 if (websocket) { 3741 hostlen = 0; 3742 port = addrstr; 3743 } else { 3744 error_setg(errp, "no vnc port specified"); 3745 goto cleanup; 3746 } 3747 } else { 3748 hostlen = port - addrstr; 3749 port++; 3750 if (*port == '\0') { 3751 error_setg(errp, "vnc port cannot be empty"); 3752 goto cleanup; 3753 } 3754 } 3755 3756 addr->type = SOCKET_ADDRESS_TYPE_INET; 3757 inet = &addr->u.inet; 3758 if (addrstr[0] == '[' && addrstr[hostlen - 1] == ']') { 3759 inet->host = g_strndup(addrstr + 1, hostlen - 2); 3760 } else { 3761 inet->host = g_strndup(addrstr, hostlen); 3762 } 3763 /* plain VNC port is just an offset, for websocket 3764 * port is absolute */ 3765 if (websocket) { 3766 if (g_str_equal(addrstr, "") || 3767 g_str_equal(addrstr, "on")) { 3768 if (displaynum == -1) { 3769 error_setg(errp, "explicit websocket port is required"); 3770 goto cleanup; 3771 } 3772 inet->port = g_strdup_printf( 3773 "%d", displaynum + 5700); 3774 if (to) { 3775 inet->has_to = true; 3776 inet->to = to + 5700; 3777 } 3778 } else { 3779 inet->port = g_strdup(port); 3780 } 3781 } else { 3782 int offset = reverse ? 0 : 5900; 3783 if (parse_uint_full(port, &baseport, 10) < 0) { 3784 error_setg(errp, "can't convert to a number: %s", port); 3785 goto cleanup; 3786 } 3787 if (baseport > 65535 || 3788 baseport + offset > 65535) { 3789 error_setg(errp, "port %s out of range", port); 3790 goto cleanup; 3791 } 3792 inet->port = g_strdup_printf( 3793 "%d", (int)baseport + offset); 3794 3795 if (to) { 3796 inet->has_to = true; 3797 inet->to = to + offset; 3798 } 3799 } 3800 3801 inet->ipv4 = ipv4; 3802 inet->has_ipv4 = has_ipv4; 3803 inet->ipv6 = ipv6; 3804 inet->has_ipv6 = has_ipv6; 3805 3806 ret = baseport; 3807 } 3808 3809 *retaddr = addr; 3810 3811 cleanup: 3812 if (ret < 0) { 3813 qapi_free_SocketAddress(addr); 3814 } 3815 return ret; 3816 } 3817 3818 static int vnc_display_get_addresses(QemuOpts *opts, 3819 bool reverse, 3820 SocketAddressList **saddr_list_ret, 3821 SocketAddressList **wsaddr_list_ret, 3822 Error **errp) 3823 { 3824 SocketAddress *saddr = NULL; 3825 SocketAddress *wsaddr = NULL; 3826 g_autoptr(SocketAddressList) saddr_list = NULL; 3827 SocketAddressList **saddr_tail = &saddr_list; 3828 SocketAddress *single_saddr = NULL; 3829 g_autoptr(SocketAddressList) wsaddr_list = NULL; 3830 SocketAddressList **wsaddr_tail = &wsaddr_list; 3831 QemuOptsIter addriter; 3832 const char *addr; 3833 int to = qemu_opt_get_number(opts, "to", 0); 3834 bool has_ipv4 = qemu_opt_get(opts, "ipv4"); 3835 bool has_ipv6 = qemu_opt_get(opts, "ipv6"); 3836 bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false); 3837 bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false); 3838 int displaynum = -1; 3839 3840 addr = qemu_opt_get(opts, "vnc"); 3841 if (addr == NULL || g_str_equal(addr, "none")) { 3842 return 0; 3843 } 3844 if (qemu_opt_get(opts, "websocket") && 3845 !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) { 3846 error_setg(errp, 3847 "SHA1 hash support is required for websockets"); 3848 return -1; 3849 } 3850 3851 qemu_opt_iter_init(&addriter, opts, "vnc"); 3852 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3853 int rv; 3854 rv = vnc_display_get_address(addr, false, reverse, 0, to, 3855 has_ipv4, has_ipv6, 3856 ipv4, ipv6, 3857 &saddr, errp); 3858 if (rv < 0) { 3859 return -1; 3860 } 3861 /* Historical compat - first listen address can be used 3862 * to set the default websocket port 3863 */ 3864 if (displaynum == -1) { 3865 displaynum = rv; 3866 } 3867 QAPI_LIST_APPEND(saddr_tail, saddr); 3868 } 3869 3870 if (saddr_list && !saddr_list->next) { 3871 single_saddr = saddr_list->value; 3872 } else { 3873 /* 3874 * If we had multiple primary displays, we don't do defaults 3875 * for websocket, and require explicit config instead. 3876 */ 3877 displaynum = -1; 3878 } 3879 3880 qemu_opt_iter_init(&addriter, opts, "websocket"); 3881 while ((addr = qemu_opt_iter_next(&addriter)) != NULL) { 3882 if (vnc_display_get_address(addr, true, reverse, displaynum, to, 3883 has_ipv4, has_ipv6, 3884 ipv4, ipv6, 3885 &wsaddr, errp) < 0) { 3886 return -1; 3887 } 3888 3889 /* Historical compat - if only a single listen address was 3890 * provided, then this is used to set the default listen 3891 * address for websocket too 3892 */ 3893 if (single_saddr && 3894 single_saddr->type == SOCKET_ADDRESS_TYPE_INET && 3895 wsaddr->type == SOCKET_ADDRESS_TYPE_INET && 3896 g_str_equal(wsaddr->u.inet.host, "") && 3897 !g_str_equal(single_saddr->u.inet.host, "")) { 3898 g_free(wsaddr->u.inet.host); 3899 wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host); 3900 } 3901 3902 QAPI_LIST_APPEND(wsaddr_tail, wsaddr); 3903 } 3904 3905 *saddr_list_ret = g_steal_pointer(&saddr_list); 3906 *wsaddr_list_ret = g_steal_pointer(&wsaddr_list); 3907 return 0; 3908 } 3909 3910 static int vnc_display_connect(VncDisplay *vd, 3911 SocketAddressList *saddr_list, 3912 SocketAddressList *wsaddr_list, 3913 Error **errp) 3914 { 3915 /* connect to viewer */ 3916 QIOChannelSocket *sioc = NULL; 3917 if (wsaddr_list) { 3918 error_setg(errp, "Cannot use websockets in reverse mode"); 3919 return -1; 3920 } 3921 if (!saddr_list || saddr_list->next) { 3922 error_setg(errp, "Expected a single address in reverse mode"); 3923 return -1; 3924 } 3925 /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ 3926 vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; 3927 sioc = qio_channel_socket_new(); 3928 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); 3929 if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { 3930 object_unref(OBJECT(sioc)); 3931 return -1; 3932 } 3933 vnc_connect(vd, sioc, false, false); 3934 object_unref(OBJECT(sioc)); 3935 return 0; 3936 } 3937 3938 3939 static int vnc_display_listen(VncDisplay *vd, 3940 SocketAddressList *saddr_list, 3941 SocketAddressList *wsaddr_list, 3942 Error **errp) 3943 { 3944 SocketAddressList *el; 3945 3946 if (saddr_list) { 3947 vd->listener = qio_net_listener_new(); 3948 qio_net_listener_set_name(vd->listener, "vnc-listen"); 3949 for (el = saddr_list; el; el = el->next) { 3950 if (qio_net_listener_open_sync(vd->listener, 3951 el->value, 1, 3952 errp) < 0) { 3953 return -1; 3954 } 3955 } 3956 3957 qio_net_listener_set_client_func(vd->listener, 3958 vnc_listen_io, vd, NULL); 3959 } 3960 3961 if (wsaddr_list) { 3962 vd->wslistener = qio_net_listener_new(); 3963 qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen"); 3964 for (el = wsaddr_list; el; el = el->next) { 3965 if (qio_net_listener_open_sync(vd->wslistener, 3966 el->value, 1, 3967 errp) < 0) { 3968 return -1; 3969 } 3970 } 3971 3972 qio_net_listener_set_client_func(vd->wslistener, 3973 vnc_listen_io, vd, NULL); 3974 } 3975 3976 return 0; 3977 } 3978 3979 bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp) 3980 { 3981 VncDisplay *vd = vnc_display_find(NULL); 3982 3983 if (!vd) { 3984 error_setg(errp, "Can not find vnc display"); 3985 return false; 3986 } 3987 3988 if (arg->has_addresses) { 3989 if (vd->listener) { 3990 qio_net_listener_disconnect(vd->listener); 3991 object_unref(OBJECT(vd->listener)); 3992 vd->listener = NULL; 3993 } 3994 3995 if (vnc_display_listen(vd, arg->addresses, NULL, errp) < 0) { 3996 return false; 3997 } 3998 } 3999 4000 return true; 4001 } 4002 4003 void vnc_display_open(const char *id, Error **errp) 4004 { 4005 VncDisplay *vd = vnc_display_find(id); 4006 QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id); 4007 g_autoptr(SocketAddressList) saddr_list = NULL; 4008 g_autoptr(SocketAddressList) wsaddr_list = NULL; 4009 const char *share, *device_id; 4010 QemuConsole *con; 4011 bool password = false; 4012 bool reverse = false; 4013 const char *credid; 4014 bool sasl = false; 4015 const char *tlsauthz; 4016 const char *saslauthz; 4017 int lock_key_sync = 1; 4018 int key_delay_ms; 4019 const char *audiodev; 4020 const char *passwordSecret; 4021 4022 if (!vd) { 4023 error_setg(errp, "VNC display not active"); 4024 return; 4025 } 4026 vnc_display_close(vd); 4027 4028 if (!opts) { 4029 return; 4030 } 4031 4032 reverse = qemu_opt_get_bool(opts, "reverse", false); 4033 if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list, 4034 errp) < 0) { 4035 goto fail; 4036 } 4037 4038 4039 passwordSecret = qemu_opt_get(opts, "password-secret"); 4040 if (passwordSecret) { 4041 if (qemu_opt_get(opts, "password")) { 4042 error_setg(errp, 4043 "'password' flag is redundant with 'password-secret'"); 4044 goto fail; 4045 } 4046 vd->password = qcrypto_secret_lookup_as_utf8(passwordSecret, 4047 errp); 4048 if (!vd->password) { 4049 goto fail; 4050 } 4051 password = true; 4052 } else { 4053 password = qemu_opt_get_bool(opts, "password", false); 4054 } 4055 if (password) { 4056 if (!qcrypto_cipher_supports( 4057 QCRYPTO_CIPHER_ALG_DES, QCRYPTO_CIPHER_MODE_ECB)) { 4058 error_setg(errp, 4059 "Cipher backend does not support DES algorithm"); 4060 goto fail; 4061 } 4062 } 4063 4064 lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); 4065 key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 10); 4066 sasl = qemu_opt_get_bool(opts, "sasl", false); 4067 #ifndef CONFIG_VNC_SASL 4068 if (sasl) { 4069 error_setg(errp, "VNC SASL auth requires cyrus-sasl support"); 4070 goto fail; 4071 } 4072 #endif /* CONFIG_VNC_SASL */ 4073 credid = qemu_opt_get(opts, "tls-creds"); 4074 if (credid) { 4075 Object *creds; 4076 creds = object_resolve_path_component( 4077 object_get_objects_root(), credid); 4078 if (!creds) { 4079 error_setg(errp, "No TLS credentials with id '%s'", 4080 credid); 4081 goto fail; 4082 } 4083 vd->tlscreds = (QCryptoTLSCreds *) 4084 object_dynamic_cast(creds, 4085 TYPE_QCRYPTO_TLS_CREDS); 4086 if (!vd->tlscreds) { 4087 error_setg(errp, "Object with id '%s' is not TLS credentials", 4088 credid); 4089 goto fail; 4090 } 4091 object_ref(OBJECT(vd->tlscreds)); 4092 4093 if (!qcrypto_tls_creds_check_endpoint(vd->tlscreds, 4094 QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, 4095 errp)) { 4096 goto fail; 4097 } 4098 } 4099 tlsauthz = qemu_opt_get(opts, "tls-authz"); 4100 if (tlsauthz && !vd->tlscreds) { 4101 error_setg(errp, "'tls-authz' provided but TLS is not enabled"); 4102 goto fail; 4103 } 4104 4105 saslauthz = qemu_opt_get(opts, "sasl-authz"); 4106 if (saslauthz && !sasl) { 4107 error_setg(errp, "'sasl-authz' provided but SASL auth is not enabled"); 4108 goto fail; 4109 } 4110 4111 share = qemu_opt_get(opts, "share"); 4112 if (share) { 4113 if (strcmp(share, "ignore") == 0) { 4114 vd->share_policy = VNC_SHARE_POLICY_IGNORE; 4115 } else if (strcmp(share, "allow-exclusive") == 0) { 4116 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4117 } else if (strcmp(share, "force-shared") == 0) { 4118 vd->share_policy = VNC_SHARE_POLICY_FORCE_SHARED; 4119 } else { 4120 error_setg(errp, "unknown vnc share= option"); 4121 goto fail; 4122 } 4123 } else { 4124 vd->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE; 4125 } 4126 vd->connections_limit = qemu_opt_get_number(opts, "connections", 32); 4127 4128 #ifdef CONFIG_VNC_JPEG 4129 vd->lossy = qemu_opt_get_bool(opts, "lossy", false); 4130 #endif 4131 vd->non_adaptive = qemu_opt_get_bool(opts, "non-adaptive", false); 4132 /* adaptive updates are only used with tight encoding and 4133 * if lossy updates are enabled so we can disable all the 4134 * calculations otherwise */ 4135 if (!vd->lossy) { 4136 vd->non_adaptive = true; 4137 } 4138 4139 vd->power_control = qemu_opt_get_bool(opts, "power-control", false); 4140 4141 if (tlsauthz) { 4142 vd->tlsauthzid = g_strdup(tlsauthz); 4143 } 4144 #ifdef CONFIG_VNC_SASL 4145 if (sasl) { 4146 if (saslauthz) { 4147 vd->sasl.authzid = g_strdup(saslauthz); 4148 } 4149 } 4150 #endif 4151 4152 if (vnc_display_setup_auth(&vd->auth, &vd->subauth, 4153 vd->tlscreds, password, 4154 sasl, false, errp) < 0) { 4155 goto fail; 4156 } 4157 trace_vnc_auth_init(vd, 0, vd->auth, vd->subauth); 4158 4159 if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth, 4160 vd->tlscreds, password, 4161 sasl, true, errp) < 0) { 4162 goto fail; 4163 } 4164 trace_vnc_auth_init(vd, 1, vd->ws_auth, vd->ws_subauth); 4165 4166 #ifdef CONFIG_VNC_SASL 4167 if (sasl && !vnc_sasl_server_init(errp)) { 4168 goto fail; 4169 } 4170 #endif 4171 vd->lock_key_sync = lock_key_sync; 4172 if (lock_key_sync) { 4173 vd->led = qemu_add_led_event_handler(kbd_leds, vd); 4174 } 4175 vd->ledstate = 0; 4176 4177 audiodev = qemu_opt_get(opts, "audiodev"); 4178 if (audiodev) { 4179 vd->audio_state = audio_state_by_name(audiodev); 4180 if (!vd->audio_state) { 4181 error_setg(errp, "Audiodev '%s' not found", audiodev); 4182 goto fail; 4183 } 4184 } 4185 4186 device_id = qemu_opt_get(opts, "display"); 4187 if (device_id) { 4188 int head = qemu_opt_get_number(opts, "head", 0); 4189 Error *err = NULL; 4190 4191 con = qemu_console_lookup_by_device_name(device_id, head, &err); 4192 if (err) { 4193 error_propagate(errp, err); 4194 goto fail; 4195 } 4196 } else { 4197 con = NULL; 4198 } 4199 4200 if (con != vd->dcl.con) { 4201 qkbd_state_free(vd->kbd); 4202 unregister_displaychangelistener(&vd->dcl); 4203 vd->dcl.con = con; 4204 register_displaychangelistener(&vd->dcl); 4205 vd->kbd = qkbd_state_init(vd->dcl.con); 4206 } 4207 qkbd_state_set_delay(vd->kbd, key_delay_ms); 4208 4209 if (saddr_list == NULL) { 4210 return; 4211 } 4212 4213 if (reverse) { 4214 if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) { 4215 goto fail; 4216 } 4217 } else { 4218 if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) { 4219 goto fail; 4220 } 4221 } 4222 4223 if (qemu_opt_get(opts, "to")) { 4224 vnc_display_print_local_addr(vd); 4225 } 4226 4227 /* Success */ 4228 return; 4229 4230 fail: 4231 vnc_display_close(vd); 4232 } 4233 4234 void vnc_display_add_client(const char *id, int csock, bool skipauth) 4235 { 4236 VncDisplay *vd = vnc_display_find(id); 4237 QIOChannelSocket *sioc; 4238 4239 if (!vd) { 4240 return; 4241 } 4242 4243 sioc = qio_channel_socket_new_fd(csock, NULL); 4244 if (sioc) { 4245 qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-server"); 4246 vnc_connect(vd, sioc, skipauth, false); 4247 object_unref(OBJECT(sioc)); 4248 } 4249 } 4250 4251 static void vnc_auto_assign_id(QemuOptsList *olist, QemuOpts *opts) 4252 { 4253 int i = 2; 4254 char *id; 4255 4256 id = g_strdup("default"); 4257 while (qemu_opts_find(olist, id)) { 4258 g_free(id); 4259 id = g_strdup_printf("vnc%d", i++); 4260 } 4261 qemu_opts_set_id(opts, id); 4262 } 4263 4264 void vnc_parse(const char *str) 4265 { 4266 QemuOptsList *olist = qemu_find_opts("vnc"); 4267 QemuOpts *opts = qemu_opts_parse_noisily(olist, str, !is_help_option(str)); 4268 const char *id; 4269 4270 if (!opts) { 4271 exit(1); 4272 } 4273 4274 id = qemu_opts_id(opts); 4275 if (!id) { 4276 /* auto-assign id if not present */ 4277 vnc_auto_assign_id(olist, opts); 4278 } 4279 } 4280 4281 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) 4282 { 4283 Error *local_err = NULL; 4284 char *id = (char *)qemu_opts_id(opts); 4285 4286 assert(id); 4287 vnc_display_init(id, &local_err); 4288 if (local_err) { 4289 error_propagate(errp, local_err); 4290 return -1; 4291 } 4292 vnc_display_open(id, &local_err); 4293 if (local_err != NULL) { 4294 error_propagate(errp, local_err); 4295 return -1; 4296 } 4297 return 0; 4298 } 4299 4300 static void vnc_register_config(void) 4301 { 4302 qemu_add_opts(&qemu_vnc_opts); 4303 } 4304 opts_init(vnc_register_config); 4305