vnc: sanitize bits_per_pixel from the client
[qemu.git] / ui / vnc.c
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 "vnc.h"
28 #include "vnc-jobs.h"
29 #include "trace.h"
30 #include "sysemu/sysemu.h"
31 #include "qemu/sockets.h"
32 #include "qemu/timer.h"
33 #include "qemu/acl.h"
34 #include "qapi/qmp/types.h"
35 #include "qmp-commands.h"
36 #include "qemu/osdep.h"
37 #include "ui/input.h"
38 #include "qapi-event.h"
39
40 #define VNC_REFRESH_INTERVAL_BASE GUI_REFRESH_INTERVAL_DEFAULT
41 #define VNC_REFRESH_INTERVAL_INC 50
42 #define VNC_REFRESH_INTERVAL_MAX GUI_REFRESH_INTERVAL_IDLE
43 static const struct timeval VNC_REFRESH_STATS = { 0, 500000 };
44 static const struct timeval VNC_REFRESH_LOSSY = { 2, 0 };
45
46 #include "vnc_keysym.h"
47 #include "d3des.h"
48
49 static VncDisplay *vnc_display; /* needed for info vnc */
50
51 static int vnc_cursor_define(VncState *vs);
52 static void vnc_release_modifiers(VncState *vs);
53
54 static void vnc_set_share_mode(VncState *vs, VncShareMode mode)
55 {
56 #ifdef _VNC_DEBUG
57 static const char *mn[] = {
58 [0] = "undefined",
59 [VNC_SHARE_MODE_CONNECTING] = "connecting",
60 [VNC_SHARE_MODE_SHARED] = "shared",
61 [VNC_SHARE_MODE_EXCLUSIVE] = "exclusive",
62 [VNC_SHARE_MODE_DISCONNECTED] = "disconnected",
63 };
64 fprintf(stderr, "%s/%d: %s -> %s\n", __func__,
65 vs->csock, mn[vs->share_mode], mn[mode]);
66 #endif
67
68 if (vs->share_mode == VNC_SHARE_MODE_EXCLUSIVE) {
69 vs->vd->num_exclusive--;
70 }
71 vs->share_mode = mode;
72 if (vs->share_mode == VNC_SHARE_MODE_EXCLUSIVE) {
73 vs->vd->num_exclusive++;
74 }
75 }
76
77 static char *addr_to_string(const char *format,
78 struct sockaddr_storage *sa,
79 socklen_t salen) {
80 char *addr;
81 char host[NI_MAXHOST];
82 char serv[NI_MAXSERV];
83 int err;
84 size_t addrlen;
85
86 if ((err = getnameinfo((struct sockaddr *)sa, salen,
87 host, sizeof(host),
88 serv, sizeof(serv),
89 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
90 VNC_DEBUG("Cannot resolve address %d: %s\n",
91 err, gai_strerror(err));
92 return NULL;
93 }
94
95 /* Enough for the existing format + the 2 vars we're
96 * substituting in. */
97 addrlen = strlen(format) + strlen(host) + strlen(serv);
98 addr = g_malloc(addrlen + 1);
99 snprintf(addr, addrlen, format, host, serv);
100 addr[addrlen] = '\0';
101
102 return addr;
103 }
104
105
106 char *vnc_socket_local_addr(const char *format, int fd) {
107 struct sockaddr_storage sa;
108 socklen_t salen;
109
110 salen = sizeof(sa);
111 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0)
112 return NULL;
113
114 return addr_to_string(format, &sa, salen);
115 }
116
117 char *vnc_socket_remote_addr(const char *format, int fd) {
118 struct sockaddr_storage sa;
119 socklen_t salen;
120
121 salen = sizeof(sa);
122 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0)
123 return NULL;
124
125 return addr_to_string(format, &sa, salen);
126 }
127
128 static VncBasicInfo *vnc_basic_info_get(struct sockaddr_storage *sa,
129 socklen_t salen)
130 {
131 VncBasicInfo *info;
132 char host[NI_MAXHOST];
133 char serv[NI_MAXSERV];
134 int err;
135
136 if ((err = getnameinfo((struct sockaddr *)sa, salen,
137 host, sizeof(host),
138 serv, sizeof(serv),
139 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
140 VNC_DEBUG("Cannot resolve address %d: %s\n",
141 err, gai_strerror(err));
142 return NULL;
143 }
144
145 info = g_malloc0(sizeof(VncBasicInfo));
146 info->host = g_strdup(host);
147 info->service = g_strdup(serv);
148 info->family = inet_netfamily(sa->ss_family);
149 return info;
150 }
151
152 static VncBasicInfo *vnc_basic_info_get_from_server_addr(int fd)
153 {
154 struct sockaddr_storage sa;
155 socklen_t salen;
156
157 salen = sizeof(sa);
158 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
159 return NULL;
160 }
161
162 return vnc_basic_info_get(&sa, salen);
163 }
164
165 static VncBasicInfo *vnc_basic_info_get_from_remote_addr(int fd)
166 {
167 struct sockaddr_storage sa;
168 socklen_t salen;
169
170 salen = sizeof(sa);
171 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
172 return NULL;
173 }
174
175 return vnc_basic_info_get(&sa, salen);
176 }
177
178 static const char *vnc_auth_name(VncDisplay *vd) {
179 switch (vd->auth) {
180 case VNC_AUTH_INVALID:
181 return "invalid";
182 case VNC_AUTH_NONE:
183 return "none";
184 case VNC_AUTH_VNC:
185 return "vnc";
186 case VNC_AUTH_RA2:
187 return "ra2";
188 case VNC_AUTH_RA2NE:
189 return "ra2ne";
190 case VNC_AUTH_TIGHT:
191 return "tight";
192 case VNC_AUTH_ULTRA:
193 return "ultra";
194 case VNC_AUTH_TLS:
195 return "tls";
196 case VNC_AUTH_VENCRYPT:
197 #ifdef CONFIG_VNC_TLS
198 switch (vd->subauth) {
199 case VNC_AUTH_VENCRYPT_PLAIN:
200 return "vencrypt+plain";
201 case VNC_AUTH_VENCRYPT_TLSNONE:
202 return "vencrypt+tls+none";
203 case VNC_AUTH_VENCRYPT_TLSVNC:
204 return "vencrypt+tls+vnc";
205 case VNC_AUTH_VENCRYPT_TLSPLAIN:
206 return "vencrypt+tls+plain";
207 case VNC_AUTH_VENCRYPT_X509NONE:
208 return "vencrypt+x509+none";
209 case VNC_AUTH_VENCRYPT_X509VNC:
210 return "vencrypt+x509+vnc";
211 case VNC_AUTH_VENCRYPT_X509PLAIN:
212 return "vencrypt+x509+plain";
213 case VNC_AUTH_VENCRYPT_TLSSASL:
214 return "vencrypt+tls+sasl";
215 case VNC_AUTH_VENCRYPT_X509SASL:
216 return "vencrypt+x509+sasl";
217 default:
218 return "vencrypt";
219 }
220 #else
221 return "vencrypt";
222 #endif
223 case VNC_AUTH_SASL:
224 return "sasl";
225 }
226 return "unknown";
227 }
228
229 static VncServerInfo *vnc_server_info_get(void)
230 {
231 VncServerInfo *info;
232 VncBasicInfo *bi = vnc_basic_info_get_from_server_addr(vnc_display->lsock);
233 if (!bi) {
234 return NULL;
235 }
236
237 info = g_malloc(sizeof(*info));
238 info->base = bi;
239 info->has_auth = true;
240 info->auth = g_strdup(vnc_auth_name(vnc_display));
241 return info;
242 }
243
244 static void vnc_client_cache_auth(VncState *client)
245 {
246 if (!client->info) {
247 return;
248 }
249
250 #ifdef CONFIG_VNC_TLS
251 if (client->tls.session &&
252 client->tls.dname) {
253 client->info->has_x509_dname = true;
254 client->info->x509_dname = g_strdup(client->tls.dname);
255 }
256 #endif
257 #ifdef CONFIG_VNC_SASL
258 if (client->sasl.conn &&
259 client->sasl.username) {
260 client->info->has_sasl_username = true;
261 client->info->sasl_username = g_strdup(client->sasl.username);
262 }
263 #endif
264 }
265
266 static void vnc_client_cache_addr(VncState *client)
267 {
268 VncBasicInfo *bi = vnc_basic_info_get_from_remote_addr(client->csock);
269
270 if (bi) {
271 client->info = g_malloc0(sizeof(*client->info));
272 client->info->base = bi;
273 }
274 }
275
276 static void vnc_qmp_event(VncState *vs, QAPIEvent event)
277 {
278 VncServerInfo *si;
279
280 if (!vs->info) {
281 return;
282 }
283 g_assert(vs->info->base);
284
285 si = vnc_server_info_get();
286 if (!si) {
287 return;
288 }
289
290 switch (event) {
291 case QAPI_EVENT_VNC_CONNECTED:
292 qapi_event_send_vnc_connected(si, vs->info->base, &error_abort);
293 break;
294 case QAPI_EVENT_VNC_INITIALIZED:
295 qapi_event_send_vnc_initialized(si, vs->info, &error_abort);
296 break;
297 case QAPI_EVENT_VNC_DISCONNECTED:
298 qapi_event_send_vnc_disconnected(si, vs->info, &error_abort);
299 break;
300 default:
301 break;
302 }
303
304 qapi_free_VncServerInfo(si);
305 }
306
307 static VncClientInfo *qmp_query_vnc_client(const VncState *client)
308 {
309 struct sockaddr_storage sa;
310 socklen_t salen = sizeof(sa);
311 char host[NI_MAXHOST];
312 char serv[NI_MAXSERV];
313 VncClientInfo *info;
314
315 if (getpeername(client->csock, (struct sockaddr *)&sa, &salen) < 0) {
316 return NULL;
317 }
318
319 if (getnameinfo((struct sockaddr *)&sa, salen,
320 host, sizeof(host),
321 serv, sizeof(serv),
322 NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
323 return NULL;
324 }
325
326 info = g_malloc0(sizeof(*info));
327 info->base = g_malloc0(sizeof(*info->base));
328 info->base->host = g_strdup(host);
329 info->base->service = g_strdup(serv);
330 info->base->family = inet_netfamily(sa.ss_family);
331
332 #ifdef CONFIG_VNC_TLS
333 if (client->tls.session && client->tls.dname) {
334 info->has_x509_dname = true;
335 info->x509_dname = g_strdup(client->tls.dname);
336 }
337 #endif
338 #ifdef CONFIG_VNC_SASL
339 if (client->sasl.conn && client->sasl.username) {
340 info->has_sasl_username = true;
341 info->sasl_username = g_strdup(client->sasl.username);
342 }
343 #endif
344
345 return info;
346 }
347
348 VncInfo *qmp_query_vnc(Error **errp)
349 {
350 VncInfo *info = g_malloc0(sizeof(*info));
351
352 if (vnc_display == NULL || vnc_display->display == NULL) {
353 info->enabled = false;
354 } else {
355 VncClientInfoList *cur_item = NULL;
356 struct sockaddr_storage sa;
357 socklen_t salen = sizeof(sa);
358 char host[NI_MAXHOST];
359 char serv[NI_MAXSERV];
360 VncState *client;
361
362 info->enabled = true;
363
364 /* for compatibility with the original command */
365 info->has_clients = true;
366
367 QTAILQ_FOREACH(client, &vnc_display->clients, next) {
368 VncClientInfoList *cinfo = g_malloc0(sizeof(*info));
369 cinfo->value = qmp_query_vnc_client(client);
370
371 /* XXX: waiting for the qapi to support GSList */
372 if (!cur_item) {
373 info->clients = cur_item = cinfo;
374 } else {
375 cur_item->next = cinfo;
376 cur_item = cinfo;
377 }
378 }
379
380 if (vnc_display->lsock == -1) {
381 return info;
382 }
383
384 if (getsockname(vnc_display->lsock, (struct sockaddr *)&sa,
385 &salen) == -1) {
386 error_set(errp, QERR_UNDEFINED_ERROR);
387 goto out_error;
388 }
389
390 if (getnameinfo((struct sockaddr *)&sa, salen,
391 host, sizeof(host),
392 serv, sizeof(serv),
393 NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
394 error_set(errp, QERR_UNDEFINED_ERROR);
395 goto out_error;
396 }
397
398 info->has_host = true;
399 info->host = g_strdup(host);
400
401 info->has_service = true;
402 info->service = g_strdup(serv);
403
404 info->has_family = true;
405 info->family = inet_netfamily(sa.ss_family);
406
407 info->has_auth = true;
408 info->auth = g_strdup(vnc_auth_name(vnc_display));
409 }
410
411 return info;
412
413 out_error:
414 qapi_free_VncInfo(info);
415 return NULL;
416 }
417
418 /* TODO
419 1) Get the queue working for IO.
420 2) there is some weirdness when using the -S option (the screen is grey
421 and not totally invalidated
422 3) resolutions > 1024
423 */
424
425 static int vnc_update_client(VncState *vs, int has_dirty, bool sync);
426 static void vnc_disconnect_start(VncState *vs);
427
428 static void vnc_colordepth(VncState *vs);
429 static void framebuffer_update_request(VncState *vs, int incremental,
430 int x_position, int y_position,
431 int w, int h);
432 static void vnc_refresh(DisplayChangeListener *dcl);
433 static int vnc_refresh_server_surface(VncDisplay *vd);
434
435 static void vnc_set_area_dirty(DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
436 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT),
437 int width, int height,
438 int x, int y, int w, int h) {
439 /* this is needed this to ensure we updated all affected
440 * blocks if x % VNC_DIRTY_PIXELS_PER_BIT != 0 */
441 w += (x % VNC_DIRTY_PIXELS_PER_BIT);
442 x -= (x % VNC_DIRTY_PIXELS_PER_BIT);
443
444 x = MIN(x, width);
445 y = MIN(y, height);
446 w = MIN(x + w, width) - x;
447 h = MIN(y + h, height);
448
449 for (; y < h; y++) {
450 bitmap_set(dirty[y], x / VNC_DIRTY_PIXELS_PER_BIT,
451 DIV_ROUND_UP(w, VNC_DIRTY_PIXELS_PER_BIT));
452 }
453 }
454
455 static void vnc_dpy_update(DisplayChangeListener *dcl,
456 int x, int y, int w, int h)
457 {
458 VncDisplay *vd = container_of(dcl, VncDisplay, dcl);
459 struct VncSurface *s = &vd->guest;
460 int width = pixman_image_get_width(vd->server);
461 int height = pixman_image_get_height(vd->server);
462
463 vnc_set_area_dirty(s->dirty, width, height, x, y, w, h);
464 }
465
466 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
467 int32_t encoding)
468 {
469 vnc_write_u16(vs, x);
470 vnc_write_u16(vs, y);
471 vnc_write_u16(vs, w);
472 vnc_write_u16(vs, h);
473
474 vnc_write_s32(vs, encoding);
475 }
476
477 void buffer_reserve(Buffer *buffer, size_t len)
478 {
479 if ((buffer->capacity - buffer->offset) < len) {
480 buffer->capacity += (len + 1024);
481 buffer->buffer = g_realloc(buffer->buffer, buffer->capacity);
482 if (buffer->buffer == NULL) {
483 fprintf(stderr, "vnc: out of memory\n");
484 exit(1);
485 }
486 }
487 }
488
489 static int buffer_empty(Buffer *buffer)
490 {
491 return buffer->offset == 0;
492 }
493
494 uint8_t *buffer_end(Buffer *buffer)
495 {
496 return buffer->buffer + buffer->offset;
497 }
498
499 void buffer_reset(Buffer *buffer)
500 {
501 buffer->offset = 0;
502 }
503
504 void buffer_free(Buffer *buffer)
505 {
506 g_free(buffer->buffer);
507 buffer->offset = 0;
508 buffer->capacity = 0;
509 buffer->buffer = NULL;
510 }
511
512 void buffer_append(Buffer *buffer, const void *data, size_t len)
513 {
514 memcpy(buffer->buffer + buffer->offset, data, len);
515 buffer->offset += len;
516 }
517
518 void buffer_advance(Buffer *buf, size_t len)
519 {
520 memmove(buf->buffer, buf->buffer + len,
521 (buf->offset - len));
522 buf->offset -= len;
523 }
524
525 static void vnc_desktop_resize(VncState *vs)
526 {
527 if (vs->csock == -1 || !vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
528 return;
529 }
530 if (vs->client_width == pixman_image_get_width(vs->vd->server) &&
531 vs->client_height == pixman_image_get_height(vs->vd->server)) {
532 return;
533 }
534 vs->client_width = pixman_image_get_width(vs->vd->server);
535 vs->client_height = pixman_image_get_height(vs->vd->server);
536 vnc_lock_output(vs);
537 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
538 vnc_write_u8(vs, 0);
539 vnc_write_u16(vs, 1); /* number of rects */
540 vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height,
541 VNC_ENCODING_DESKTOPRESIZE);
542 vnc_unlock_output(vs);
543 vnc_flush(vs);
544 }
545
546 static void vnc_abort_display_jobs(VncDisplay *vd)
547 {
548 VncState *vs;
549
550 QTAILQ_FOREACH(vs, &vd->clients, next) {
551 vnc_lock_output(vs);
552 vs->abort = true;
553 vnc_unlock_output(vs);
554 }
555 QTAILQ_FOREACH(vs, &vd->clients, next) {
556 vnc_jobs_join(vs);
557 }
558 QTAILQ_FOREACH(vs, &vd->clients, next) {
559 vnc_lock_output(vs);
560 vs->abort = false;
561 vnc_unlock_output(vs);
562 }
563 }
564
565 int vnc_server_fb_stride(VncDisplay *vd)
566 {
567 return pixman_image_get_stride(vd->server);
568 }
569
570 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y)
571 {
572 uint8_t *ptr;
573
574 ptr = (uint8_t *)pixman_image_get_data(vd->server);
575 ptr += y * vnc_server_fb_stride(vd);
576 ptr += x * VNC_SERVER_FB_BYTES;
577 return ptr;
578 }
579
580 static void vnc_dpy_switch(DisplayChangeListener *dcl,
581 DisplaySurface *surface)
582 {
583 VncDisplay *vd = container_of(dcl, VncDisplay, dcl);
584 VncState *vs;
585 int width, height;
586
587 vnc_abort_display_jobs(vd);
588
589 /* server surface */
590 qemu_pixman_image_unref(vd->server);
591 vd->ds = surface;
592 width = MIN(VNC_MAX_WIDTH, ROUND_UP(surface_width(vd->ds),
593 VNC_DIRTY_PIXELS_PER_BIT));
594 height = MIN(VNC_MAX_HEIGHT, surface_height(vd->ds));
595 vd->server = pixman_image_create_bits(VNC_SERVER_FB_FORMAT,
596 width, height, NULL, 0);
597
598 /* guest surface */
599 #if 0 /* FIXME */
600 if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel)
601 console_color_init(ds);
602 #endif
603 qemu_pixman_image_unref(vd->guest.fb);
604 vd->guest.fb = pixman_image_ref(surface->image);
605 vd->guest.format = surface->format;
606 memset(vd->guest.dirty, 0x00, sizeof(vd->guest.dirty));
607 vnc_set_area_dirty(vd->guest.dirty, width, height, 0, 0,
608 width, height);
609
610 QTAILQ_FOREACH(vs, &vd->clients, next) {
611 vnc_colordepth(vs);
612 vnc_desktop_resize(vs);
613 if (vs->vd->cursor) {
614 vnc_cursor_define(vs);
615 }
616 memset(vs->dirty, 0x00, sizeof(vs->dirty));
617 vnc_set_area_dirty(vs->dirty, width, height, 0, 0,
618 width, height);
619 }
620 }
621
622 /* fastest code */
623 static void vnc_write_pixels_copy(VncState *vs,
624 void *pixels, int size)
625 {
626 vnc_write(vs, pixels, size);
627 }
628
629 /* slowest but generic code. */
630 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
631 {
632 uint8_t r, g, b;
633
634 #if VNC_SERVER_FB_FORMAT == PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
635 r = (((v & 0x00ff0000) >> 16) << vs->client_pf.rbits) >> 8;
636 g = (((v & 0x0000ff00) >> 8) << vs->client_pf.gbits) >> 8;
637 b = (((v & 0x000000ff) >> 0) << vs->client_pf.bbits) >> 8;
638 #else
639 # error need some bits here if you change VNC_SERVER_FB_FORMAT
640 #endif
641 v = (r << vs->client_pf.rshift) |
642 (g << vs->client_pf.gshift) |
643 (b << vs->client_pf.bshift);
644 switch (vs->client_pf.bytes_per_pixel) {
645 case 1:
646 buf[0] = v;
647 break;
648 case 2:
649 if (vs->client_be) {
650 buf[0] = v >> 8;
651 buf[1] = v;
652 } else {
653 buf[1] = v >> 8;
654 buf[0] = v;
655 }
656 break;
657 default:
658 case 4:
659 if (vs->client_be) {
660 buf[0] = v >> 24;
661 buf[1] = v >> 16;
662 buf[2] = v >> 8;
663 buf[3] = v;
664 } else {
665 buf[3] = v >> 24;
666 buf[2] = v >> 16;
667 buf[1] = v >> 8;
668 buf[0] = v;
669 }
670 break;
671 }
672 }
673
674 static void vnc_write_pixels_generic(VncState *vs,
675 void *pixels1, int size)
676 {
677 uint8_t buf[4];
678
679 if (VNC_SERVER_FB_BYTES == 4) {
680 uint32_t *pixels = pixels1;
681 int n, i;
682 n = size >> 2;
683 for (i = 0; i < n; i++) {
684 vnc_convert_pixel(vs, buf, pixels[i]);
685 vnc_write(vs, buf, vs->client_pf.bytes_per_pixel);
686 }
687 }
688 }
689
690 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
691 {
692 int i;
693 uint8_t *row;
694 VncDisplay *vd = vs->vd;
695
696 row = vnc_server_fb_ptr(vd, x, y);
697 for (i = 0; i < h; i++) {
698 vs->write_pixels(vs, row, w * VNC_SERVER_FB_BYTES);
699 row += vnc_server_fb_stride(vd);
700 }
701 return 1;
702 }
703
704 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
705 {
706 int n = 0;
707
708 switch(vs->vnc_encoding) {
709 case VNC_ENCODING_ZLIB:
710 n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h);
711 break;
712 case VNC_ENCODING_HEXTILE:
713 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE);
714 n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h);
715 break;
716 case VNC_ENCODING_TIGHT:
717 n = vnc_tight_send_framebuffer_update(vs, x, y, w, h);
718 break;
719 case VNC_ENCODING_TIGHT_PNG:
720 n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h);
721 break;
722 case VNC_ENCODING_ZRLE:
723 n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h);
724 break;
725 case VNC_ENCODING_ZYWRLE:
726 n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h);
727 break;
728 default:
729 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW);
730 n = vnc_raw_send_framebuffer_update(vs, x, y, w, h);
731 break;
732 }
733 return n;
734 }
735
736 static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
737 {
738 /* send bitblit op to the vnc client */
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, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT);
744 vnc_write_u16(vs, src_x);
745 vnc_write_u16(vs, src_y);
746 vnc_unlock_output(vs);
747 vnc_flush(vs);
748 }
749
750 static void vnc_dpy_copy(DisplayChangeListener *dcl,
751 int src_x, int src_y,
752 int dst_x, int dst_y, int w, int h)
753 {
754 VncDisplay *vd = container_of(dcl, VncDisplay, dcl);
755 VncState *vs, *vn;
756 uint8_t *src_row;
757 uint8_t *dst_row;
758 int i, x, y, pitch, inc, w_lim, s;
759 int cmp_bytes;
760
761 vnc_refresh_server_surface(vd);
762 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
763 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
764 vs->force_update = 1;
765 vnc_update_client(vs, 1, true);
766 /* vs might be free()ed here */
767 }
768 }
769
770 /* do bitblit op on the local surface too */
771 pitch = vnc_server_fb_stride(vd);
772 src_row = vnc_server_fb_ptr(vd, src_x, src_y);
773 dst_row = vnc_server_fb_ptr(vd, dst_x, dst_y);
774 y = dst_y;
775 inc = 1;
776 if (dst_y > src_y) {
777 /* copy backwards */
778 src_row += pitch * (h-1);
779 dst_row += pitch * (h-1);
780 pitch = -pitch;
781 y = dst_y + h - 1;
782 inc = -1;
783 }
784 w_lim = w - (VNC_DIRTY_PIXELS_PER_BIT - (dst_x % VNC_DIRTY_PIXELS_PER_BIT));
785 if (w_lim < 0) {
786 w_lim = w;
787 } else {
788 w_lim = w - (w_lim % VNC_DIRTY_PIXELS_PER_BIT);
789 }
790 for (i = 0; i < h; i++) {
791 for (x = 0; x <= w_lim;
792 x += s, src_row += cmp_bytes, dst_row += cmp_bytes) {
793 if (x == w_lim) {
794 if ((s = w - w_lim) == 0)
795 break;
796 } else if (!x) {
797 s = (VNC_DIRTY_PIXELS_PER_BIT -
798 (dst_x % VNC_DIRTY_PIXELS_PER_BIT));
799 s = MIN(s, w_lim);
800 } else {
801 s = VNC_DIRTY_PIXELS_PER_BIT;
802 }
803 cmp_bytes = s * VNC_SERVER_FB_BYTES;
804 if (memcmp(src_row, dst_row, cmp_bytes) == 0)
805 continue;
806 memmove(dst_row, src_row, cmp_bytes);
807 QTAILQ_FOREACH(vs, &vd->clients, next) {
808 if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
809 set_bit(((x + dst_x) / VNC_DIRTY_PIXELS_PER_BIT),
810 vs->dirty[y]);
811 }
812 }
813 }
814 src_row += pitch - w * VNC_SERVER_FB_BYTES;
815 dst_row += pitch - w * VNC_SERVER_FB_BYTES;
816 y += inc;
817 }
818
819 QTAILQ_FOREACH(vs, &vd->clients, next) {
820 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
821 vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h);
822 }
823 }
824 }
825
826 static void vnc_mouse_set(DisplayChangeListener *dcl,
827 int x, int y, int visible)
828 {
829 /* can we ask the client(s) to move the pointer ??? */
830 }
831
832 static int vnc_cursor_define(VncState *vs)
833 {
834 QEMUCursor *c = vs->vd->cursor;
835 int isize;
836
837 if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) {
838 vnc_lock_output(vs);
839 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
840 vnc_write_u8(vs, 0); /* padding */
841 vnc_write_u16(vs, 1); /* # of rects */
842 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height,
843 VNC_ENCODING_RICH_CURSOR);
844 isize = c->width * c->height * vs->client_pf.bytes_per_pixel;
845 vnc_write_pixels_generic(vs, c->data, isize);
846 vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize);
847 vnc_unlock_output(vs);
848 return 0;
849 }
850 return -1;
851 }
852
853 static void vnc_dpy_cursor_define(DisplayChangeListener *dcl,
854 QEMUCursor *c)
855 {
856 VncDisplay *vd = vnc_display;
857 VncState *vs;
858
859 cursor_put(vd->cursor);
860 g_free(vd->cursor_mask);
861
862 vd->cursor = c;
863 cursor_get(vd->cursor);
864 vd->cursor_msize = cursor_get_mono_bpl(c) * c->height;
865 vd->cursor_mask = g_malloc0(vd->cursor_msize);
866 cursor_get_mono_mask(c, 0, vd->cursor_mask);
867
868 QTAILQ_FOREACH(vs, &vd->clients, next) {
869 vnc_cursor_define(vs);
870 }
871 }
872
873 static int find_and_clear_dirty_height(struct VncState *vs,
874 int y, int last_x, int x, int height)
875 {
876 int h;
877
878 for (h = 1; h < (height - y); h++) {
879 if (!test_bit(last_x, vs->dirty[y + h])) {
880 break;
881 }
882 bitmap_clear(vs->dirty[y + h], last_x, x - last_x);
883 }
884
885 return h;
886 }
887
888 static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
889 {
890 vs->has_dirty += has_dirty;
891 if (vs->need_update && vs->csock != -1) {
892 VncDisplay *vd = vs->vd;
893 VncJob *job;
894 int y;
895 int height, width;
896 int n = 0;
897
898 if (vs->output.offset && !vs->audio_cap && !vs->force_update)
899 /* kernel send buffers are full -> drop frames to throttle */
900 return 0;
901
902 if (!vs->has_dirty && !vs->audio_cap && !vs->force_update)
903 return 0;
904
905 /*
906 * Send screen updates to the vnc client using the server
907 * surface and server dirty map. guest surface updates
908 * happening in parallel don't disturb us, the next pass will
909 * send them to the client.
910 */
911 job = vnc_job_new(vs);
912
913 height = pixman_image_get_height(vd->server);
914 width = pixman_image_get_width(vd->server);
915
916 y = 0;
917 for (;;) {
918 int x, h;
919 unsigned long x2;
920 unsigned long offset = find_next_bit((unsigned long *) &vs->dirty,
921 height * VNC_DIRTY_BPL(vs),
922 y * VNC_DIRTY_BPL(vs));
923 if (offset == height * VNC_DIRTY_BPL(vs)) {
924 /* no more dirty bits */
925 break;
926 }
927 y = offset / VNC_DIRTY_BPL(vs);
928 x = offset % VNC_DIRTY_BPL(vs);
929 x2 = find_next_zero_bit((unsigned long *) &vs->dirty[y],
930 VNC_DIRTY_BPL(vs), x);
931 bitmap_clear(vs->dirty[y], x, x2 - x);
932 h = find_and_clear_dirty_height(vs, y, x, x2, height);
933 x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT);
934 if (x2 > x) {
935 n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y,
936 (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h);
937 }
938 }
939
940 vnc_job_push(job);
941 if (sync) {
942 vnc_jobs_join(vs);
943 }
944 vs->force_update = 0;
945 vs->has_dirty = 0;
946 return n;
947 }
948
949 if (vs->csock == -1) {
950 vnc_disconnect_finish(vs);
951 } else if (sync) {
952 vnc_jobs_join(vs);
953 }
954
955 return 0;
956 }
957
958 /* audio */
959 static void audio_capture_notify(void *opaque, audcnotification_e cmd)
960 {
961 VncState *vs = opaque;
962
963 switch (cmd) {
964 case AUD_CNOTIFY_DISABLE:
965 vnc_lock_output(vs);
966 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
967 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
968 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END);
969 vnc_unlock_output(vs);
970 vnc_flush(vs);
971 break;
972
973 case AUD_CNOTIFY_ENABLE:
974 vnc_lock_output(vs);
975 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
976 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
977 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN);
978 vnc_unlock_output(vs);
979 vnc_flush(vs);
980 break;
981 }
982 }
983
984 static void audio_capture_destroy(void *opaque)
985 {
986 }
987
988 static void audio_capture(void *opaque, void *buf, int size)
989 {
990 VncState *vs = opaque;
991
992 vnc_lock_output(vs);
993 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
994 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
995 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA);
996 vnc_write_u32(vs, size);
997 vnc_write(vs, buf, size);
998 vnc_unlock_output(vs);
999 vnc_flush(vs);
1000 }
1001
1002 static void audio_add(VncState *vs)
1003 {
1004 struct audio_capture_ops ops;
1005
1006 if (vs->audio_cap) {
1007 error_report("audio already running");
1008 return;
1009 }
1010
1011 ops.notify = audio_capture_notify;
1012 ops.destroy = audio_capture_destroy;
1013 ops.capture = audio_capture;
1014
1015 vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs);
1016 if (!vs->audio_cap) {
1017 error_report("Failed to add audio capture");
1018 }
1019 }
1020
1021 static void audio_del(VncState *vs)
1022 {
1023 if (vs->audio_cap) {
1024 AUD_del_capture(vs->audio_cap, vs);
1025 vs->audio_cap = NULL;
1026 }
1027 }
1028
1029 static void vnc_disconnect_start(VncState *vs)
1030 {
1031 if (vs->csock == -1)
1032 return;
1033 vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED);
1034 qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
1035 closesocket(vs->csock);
1036 vs->csock = -1;
1037 }
1038
1039 void vnc_disconnect_finish(VncState *vs)
1040 {
1041 int i;
1042
1043 vnc_jobs_join(vs); /* Wait encoding jobs */
1044
1045 vnc_lock_output(vs);
1046 vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED);
1047
1048 buffer_free(&vs->input);
1049 buffer_free(&vs->output);
1050 #ifdef CONFIG_VNC_WS
1051 buffer_free(&vs->ws_input);
1052 buffer_free(&vs->ws_output);
1053 #endif /* CONFIG_VNC_WS */
1054
1055 qapi_free_VncClientInfo(vs->info);
1056
1057 vnc_zlib_clear(vs);
1058 vnc_tight_clear(vs);
1059 vnc_zrle_clear(vs);
1060
1061 #ifdef CONFIG_VNC_TLS
1062 vnc_tls_client_cleanup(vs);
1063 #endif /* CONFIG_VNC_TLS */
1064 #ifdef CONFIG_VNC_SASL
1065 vnc_sasl_client_cleanup(vs);
1066 #endif /* CONFIG_VNC_SASL */
1067 audio_del(vs);
1068 vnc_release_modifiers(vs);
1069
1070 if (vs->initialized) {
1071 QTAILQ_REMOVE(&vs->vd->clients, vs, next);
1072 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
1073 }
1074
1075 if (vs->vd->lock_key_sync)
1076 qemu_remove_led_event_handler(vs->led);
1077 vnc_unlock_output(vs);
1078
1079 qemu_mutex_destroy(&vs->output_mutex);
1080 if (vs->bh != NULL) {
1081 qemu_bh_delete(vs->bh);
1082 }
1083 buffer_free(&vs->jobs_buffer);
1084
1085 for (i = 0; i < VNC_STAT_ROWS; ++i) {
1086 g_free(vs->lossy_rect[i]);
1087 }
1088 g_free(vs->lossy_rect);
1089 g_free(vs);
1090 }
1091
1092 int vnc_client_io_error(VncState *vs, int ret, int last_errno)
1093 {
1094 if (ret == 0 || ret == -1) {
1095 if (ret == -1) {
1096 switch (last_errno) {
1097 case EINTR:
1098 case EAGAIN:
1099 #ifdef _WIN32
1100 case WSAEWOULDBLOCK:
1101 #endif
1102 return 0;
1103 default:
1104 break;
1105 }
1106 }
1107
1108 VNC_DEBUG("Closing down client sock: ret %d, errno %d\n",
1109 ret, ret < 0 ? last_errno : 0);
1110 vnc_disconnect_start(vs);
1111
1112 return 0;
1113 }
1114 return ret;
1115 }
1116
1117
1118 void vnc_client_error(VncState *vs)
1119 {
1120 VNC_DEBUG("Closing down client sock: protocol error\n");
1121 vnc_disconnect_start(vs);
1122 }
1123
1124 #ifdef CONFIG_VNC_TLS
1125 static long vnc_client_write_tls(gnutls_session_t *session,
1126 const uint8_t *data,
1127 size_t datalen)
1128 {
1129 long ret = gnutls_write(*session, data, datalen);
1130 if (ret < 0) {
1131 if (ret == GNUTLS_E_AGAIN) {
1132 errno = EAGAIN;
1133 } else {
1134 errno = EIO;
1135 }
1136 ret = -1;
1137 }
1138 return ret;
1139 }
1140 #endif /* CONFIG_VNC_TLS */
1141
1142 /*
1143 * Called to write a chunk of data to the client socket. The data may
1144 * be the raw data, or may have already been encoded by SASL.
1145 * The data will be written either straight onto the socket, or
1146 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1147 *
1148 * NB, it is theoretically possible to have 2 layers of encryption,
1149 * both SASL, and this TLS layer. It is highly unlikely in practice
1150 * though, since SASL encryption will typically be a no-op if TLS
1151 * is active
1152 *
1153 * Returns the number of bytes written, which may be less than
1154 * the requested 'datalen' if the socket would block. Returns
1155 * -1 on error, and disconnects the client socket.
1156 */
1157 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
1158 {
1159 long ret;
1160 #ifdef CONFIG_VNC_TLS
1161 if (vs->tls.session) {
1162 ret = vnc_client_write_tls(&vs->tls.session, data, datalen);
1163 } else {
1164 #ifdef CONFIG_VNC_WS
1165 if (vs->ws_tls.session) {
1166 ret = vnc_client_write_tls(&vs->ws_tls.session, data, datalen);
1167 } else
1168 #endif /* CONFIG_VNC_WS */
1169 #endif /* CONFIG_VNC_TLS */
1170 {
1171 ret = send(vs->csock, (const void *)data, datalen, 0);
1172 }
1173 #ifdef CONFIG_VNC_TLS
1174 }
1175 #endif /* CONFIG_VNC_TLS */
1176 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
1177 return vnc_client_io_error(vs, ret, socket_error());
1178 }
1179
1180
1181 /*
1182 * Called to write buffered data to the client socket, when not
1183 * using any SASL SSF encryption layers. Will write as much data
1184 * as possible without blocking. If all buffered data is written,
1185 * will switch the FD poll() handler back to read monitoring.
1186 *
1187 * Returns the number of bytes written, which may be less than
1188 * the buffered output data if the socket would block. Returns
1189 * -1 on error, and disconnects the client socket.
1190 */
1191 static long vnc_client_write_plain(VncState *vs)
1192 {
1193 long ret;
1194
1195 #ifdef CONFIG_VNC_SASL
1196 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n",
1197 vs->output.buffer, vs->output.capacity, vs->output.offset,
1198 vs->sasl.waitWriteSSF);
1199
1200 if (vs->sasl.conn &&
1201 vs->sasl.runSSF &&
1202 vs->sasl.waitWriteSSF) {
1203 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF);
1204 if (ret)
1205 vs->sasl.waitWriteSSF -= ret;
1206 } else
1207 #endif /* CONFIG_VNC_SASL */
1208 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset);
1209 if (!ret)
1210 return 0;
1211
1212 buffer_advance(&vs->output, ret);
1213
1214 if (vs->output.offset == 0) {
1215 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1216 }
1217
1218 return ret;
1219 }
1220
1221
1222 /*
1223 * First function called whenever there is data to be written to
1224 * the client socket. Will delegate actual work according to whether
1225 * SASL SSF layers are enabled (thus requiring encryption calls)
1226 */
1227 static void vnc_client_write_locked(void *opaque)
1228 {
1229 VncState *vs = opaque;
1230
1231 #ifdef CONFIG_VNC_SASL
1232 if (vs->sasl.conn &&
1233 vs->sasl.runSSF &&
1234 !vs->sasl.waitWriteSSF) {
1235 vnc_client_write_sasl(vs);
1236 } else
1237 #endif /* CONFIG_VNC_SASL */
1238 {
1239 #ifdef CONFIG_VNC_WS
1240 if (vs->encode_ws) {
1241 vnc_client_write_ws(vs);
1242 } else
1243 #endif /* CONFIG_VNC_WS */
1244 {
1245 vnc_client_write_plain(vs);
1246 }
1247 }
1248 }
1249
1250 void vnc_client_write(void *opaque)
1251 {
1252 VncState *vs = opaque;
1253
1254 vnc_lock_output(vs);
1255 if (vs->output.offset
1256 #ifdef CONFIG_VNC_WS
1257 || vs->ws_output.offset
1258 #endif
1259 ) {
1260 vnc_client_write_locked(opaque);
1261 } else if (vs->csock != -1) {
1262 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1263 }
1264 vnc_unlock_output(vs);
1265 }
1266
1267 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
1268 {
1269 vs->read_handler = func;
1270 vs->read_handler_expect = expecting;
1271 }
1272
1273 #ifdef CONFIG_VNC_TLS
1274 static long vnc_client_read_tls(gnutls_session_t *session, uint8_t *data,
1275 size_t datalen)
1276 {
1277 long ret = gnutls_read(*session, data, datalen);
1278 if (ret < 0) {
1279 if (ret == GNUTLS_E_AGAIN) {
1280 errno = EAGAIN;
1281 } else {
1282 errno = EIO;
1283 }
1284 ret = -1;
1285 }
1286 return ret;
1287 }
1288 #endif /* CONFIG_VNC_TLS */
1289
1290 /*
1291 * Called to read a chunk of data from the client socket. The data may
1292 * be the raw data, or may need to be further decoded by SASL.
1293 * The data will be read either straight from to the socket, or
1294 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1295 *
1296 * NB, it is theoretically possible to have 2 layers of encryption,
1297 * both SASL, and this TLS layer. It is highly unlikely in practice
1298 * though, since SASL encryption will typically be a no-op if TLS
1299 * is active
1300 *
1301 * Returns the number of bytes read, which may be less than
1302 * the requested 'datalen' if the socket would block. Returns
1303 * -1 on error, and disconnects the client socket.
1304 */
1305 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
1306 {
1307 long ret;
1308 #ifdef CONFIG_VNC_TLS
1309 if (vs->tls.session) {
1310 ret = vnc_client_read_tls(&vs->tls.session, data, datalen);
1311 } else {
1312 #ifdef CONFIG_VNC_WS
1313 if (vs->ws_tls.session) {
1314 ret = vnc_client_read_tls(&vs->ws_tls.session, data, datalen);
1315 } else
1316 #endif /* CONFIG_VNC_WS */
1317 #endif /* CONFIG_VNC_TLS */
1318 {
1319 ret = qemu_recv(vs->csock, data, datalen, 0);
1320 }
1321 #ifdef CONFIG_VNC_TLS
1322 }
1323 #endif /* CONFIG_VNC_TLS */
1324 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
1325 return vnc_client_io_error(vs, ret, socket_error());
1326 }
1327
1328
1329 /*
1330 * Called to read data from the client socket to the input buffer,
1331 * when not using any SASL SSF encryption layers. Will read as much
1332 * data as possible without blocking.
1333 *
1334 * Returns the number of bytes read. Returns -1 on error, and
1335 * disconnects the client socket.
1336 */
1337 static long vnc_client_read_plain(VncState *vs)
1338 {
1339 int ret;
1340 VNC_DEBUG("Read plain %p size %zd offset %zd\n",
1341 vs->input.buffer, vs->input.capacity, vs->input.offset);
1342 buffer_reserve(&vs->input, 4096);
1343 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096);
1344 if (!ret)
1345 return 0;
1346 vs->input.offset += ret;
1347 return ret;
1348 }
1349
1350 static void vnc_jobs_bh(void *opaque)
1351 {
1352 VncState *vs = opaque;
1353
1354 vnc_jobs_consume_buffer(vs);
1355 }
1356
1357 /*
1358 * First function called whenever there is more data to be read from
1359 * the client socket. Will delegate actual work according to whether
1360 * SASL SSF layers are enabled (thus requiring decryption calls)
1361 */
1362 void vnc_client_read(void *opaque)
1363 {
1364 VncState *vs = opaque;
1365 long ret;
1366
1367 #ifdef CONFIG_VNC_SASL
1368 if (vs->sasl.conn && vs->sasl.runSSF)
1369 ret = vnc_client_read_sasl(vs);
1370 else
1371 #endif /* CONFIG_VNC_SASL */
1372 #ifdef CONFIG_VNC_WS
1373 if (vs->encode_ws) {
1374 ret = vnc_client_read_ws(vs);
1375 if (ret == -1) {
1376 vnc_disconnect_start(vs);
1377 return;
1378 } else if (ret == -2) {
1379 vnc_client_error(vs);
1380 return;
1381 }
1382 } else
1383 #endif /* CONFIG_VNC_WS */
1384 {
1385 ret = vnc_client_read_plain(vs);
1386 }
1387 if (!ret) {
1388 if (vs->csock == -1)
1389 vnc_disconnect_finish(vs);
1390 return;
1391 }
1392
1393 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
1394 size_t len = vs->read_handler_expect;
1395 int ret;
1396
1397 ret = vs->read_handler(vs, vs->input.buffer, len);
1398 if (vs->csock == -1) {
1399 vnc_disconnect_finish(vs);
1400 return;
1401 }
1402
1403 if (!ret) {
1404 buffer_advance(&vs->input, len);
1405 } else {
1406 vs->read_handler_expect = ret;
1407 }
1408 }
1409 }
1410
1411 void vnc_write(VncState *vs, const void *data, size_t len)
1412 {
1413 buffer_reserve(&vs->output, len);
1414
1415 if (vs->csock != -1 && buffer_empty(&vs->output)) {
1416 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
1417 }
1418
1419 buffer_append(&vs->output, data, len);
1420 }
1421
1422 void vnc_write_s32(VncState *vs, int32_t value)
1423 {
1424 vnc_write_u32(vs, *(uint32_t *)&value);
1425 }
1426
1427 void vnc_write_u32(VncState *vs, uint32_t value)
1428 {
1429 uint8_t buf[4];
1430
1431 buf[0] = (value >> 24) & 0xFF;
1432 buf[1] = (value >> 16) & 0xFF;
1433 buf[2] = (value >> 8) & 0xFF;
1434 buf[3] = value & 0xFF;
1435
1436 vnc_write(vs, buf, 4);
1437 }
1438
1439 void vnc_write_u16(VncState *vs, uint16_t value)
1440 {
1441 uint8_t buf[2];
1442
1443 buf[0] = (value >> 8) & 0xFF;
1444 buf[1] = value & 0xFF;
1445
1446 vnc_write(vs, buf, 2);
1447 }
1448
1449 void vnc_write_u8(VncState *vs, uint8_t value)
1450 {
1451 vnc_write(vs, (char *)&value, 1);
1452 }
1453
1454 void vnc_flush(VncState *vs)
1455 {
1456 vnc_lock_output(vs);
1457 if (vs->csock != -1 && (vs->output.offset
1458 #ifdef CONFIG_VNC_WS
1459 || vs->ws_output.offset
1460 #endif
1461 )) {
1462 vnc_client_write_locked(vs);
1463 }
1464 vnc_unlock_output(vs);
1465 }
1466
1467 static uint8_t read_u8(uint8_t *data, size_t offset)
1468 {
1469 return data[offset];
1470 }
1471
1472 static uint16_t read_u16(uint8_t *data, size_t offset)
1473 {
1474 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
1475 }
1476
1477 static int32_t read_s32(uint8_t *data, size_t offset)
1478 {
1479 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
1480 (data[offset + 2] << 8) | data[offset + 3]);
1481 }
1482
1483 uint32_t read_u32(uint8_t *data, size_t offset)
1484 {
1485 return ((data[offset] << 24) | (data[offset + 1] << 16) |
1486 (data[offset + 2] << 8) | data[offset + 3]);
1487 }
1488
1489 static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
1490 {
1491 }
1492
1493 static void check_pointer_type_change(Notifier *notifier, void *data)
1494 {
1495 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier);
1496 int absolute = qemu_input_is_absolute();
1497
1498 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) {
1499 vnc_lock_output(vs);
1500 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1501 vnc_write_u8(vs, 0);
1502 vnc_write_u16(vs, 1);
1503 vnc_framebuffer_update(vs, absolute, 0,
1504 pixman_image_get_width(vs->vd->server),
1505 pixman_image_get_height(vs->vd->server),
1506 VNC_ENCODING_POINTER_TYPE_CHANGE);
1507 vnc_unlock_output(vs);
1508 vnc_flush(vs);
1509 }
1510 vs->absolute = absolute;
1511 }
1512
1513 static void pointer_event(VncState *vs, int button_mask, int x, int y)
1514 {
1515 static uint32_t bmap[INPUT_BUTTON_MAX] = {
1516 [INPUT_BUTTON_LEFT] = 0x01,
1517 [INPUT_BUTTON_MIDDLE] = 0x02,
1518 [INPUT_BUTTON_RIGHT] = 0x04,
1519 [INPUT_BUTTON_WHEEL_UP] = 0x08,
1520 [INPUT_BUTTON_WHEEL_DOWN] = 0x10,
1521 };
1522 QemuConsole *con = vs->vd->dcl.con;
1523 int width = pixman_image_get_width(vs->vd->server);
1524 int height = pixman_image_get_height(vs->vd->server);
1525
1526 if (vs->last_bmask != button_mask) {
1527 qemu_input_update_buttons(con, bmap, vs->last_bmask, button_mask);
1528 vs->last_bmask = button_mask;
1529 }
1530
1531 if (vs->absolute) {
1532 qemu_input_queue_abs(con, INPUT_AXIS_X, x, width);
1533 qemu_input_queue_abs(con, INPUT_AXIS_Y, y, height);
1534 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
1535 qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF);
1536 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF);
1537 } else {
1538 if (vs->last_x != -1) {
1539 qemu_input_queue_rel(con, INPUT_AXIS_X, x - vs->last_x);
1540 qemu_input_queue_rel(con, INPUT_AXIS_Y, y - vs->last_y);
1541 }
1542 vs->last_x = x;
1543 vs->last_y = y;
1544 }
1545 qemu_input_event_sync();
1546 }
1547
1548 static void reset_keys(VncState *vs)
1549 {
1550 int i;
1551 for(i = 0; i < 256; i++) {
1552 if (vs->modifiers_state[i]) {
1553 qemu_input_event_send_key_number(vs->vd->dcl.con, i, false);
1554 vs->modifiers_state[i] = 0;
1555 }
1556 }
1557 }
1558
1559 static void press_key(VncState *vs, int keysym)
1560 {
1561 int keycode = keysym2scancode(vs->vd->kbd_layout, keysym) & SCANCODE_KEYMASK;
1562 qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, true);
1563 qemu_input_event_send_key_delay(0);
1564 qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, false);
1565 qemu_input_event_send_key_delay(0);
1566 }
1567
1568 static int current_led_state(VncState *vs)
1569 {
1570 int ledstate = 0;
1571
1572 if (vs->modifiers_state[0x46]) {
1573 ledstate |= QEMU_SCROLL_LOCK_LED;
1574 }
1575 if (vs->modifiers_state[0x45]) {
1576 ledstate |= QEMU_NUM_LOCK_LED;
1577 }
1578 if (vs->modifiers_state[0x3a]) {
1579 ledstate |= QEMU_CAPS_LOCK_LED;
1580 }
1581
1582 return ledstate;
1583 }
1584
1585 static void vnc_led_state_change(VncState *vs)
1586 {
1587 int ledstate = 0;
1588
1589 if (!vnc_has_feature(vs, VNC_FEATURE_LED_STATE)) {
1590 return;
1591 }
1592
1593 ledstate = current_led_state(vs);
1594 vnc_lock_output(vs);
1595 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1596 vnc_write_u8(vs, 0);
1597 vnc_write_u16(vs, 1);
1598 vnc_framebuffer_update(vs, 0, 0, 1, 1, VNC_ENCODING_LED_STATE);
1599 vnc_write_u8(vs, ledstate);
1600 vnc_unlock_output(vs);
1601 vnc_flush(vs);
1602 }
1603
1604 static void kbd_leds(void *opaque, int ledstate)
1605 {
1606 VncState *vs = opaque;
1607 int caps, num, scr;
1608 bool has_changed = (ledstate != current_led_state(vs));
1609
1610 trace_vnc_key_guest_leds((ledstate & QEMU_CAPS_LOCK_LED),
1611 (ledstate & QEMU_NUM_LOCK_LED),
1612 (ledstate & QEMU_SCROLL_LOCK_LED));
1613
1614 caps = ledstate & QEMU_CAPS_LOCK_LED ? 1 : 0;
1615 num = ledstate & QEMU_NUM_LOCK_LED ? 1 : 0;
1616 scr = ledstate & QEMU_SCROLL_LOCK_LED ? 1 : 0;
1617
1618 if (vs->modifiers_state[0x3a] != caps) {
1619 vs->modifiers_state[0x3a] = caps;
1620 }
1621 if (vs->modifiers_state[0x45] != num) {
1622 vs->modifiers_state[0x45] = num;
1623 }
1624 if (vs->modifiers_state[0x46] != scr) {
1625 vs->modifiers_state[0x46] = scr;
1626 }
1627
1628 /* Sending the current led state message to the client */
1629 if (has_changed) {
1630 vnc_led_state_change(vs);
1631 }
1632 }
1633
1634 static void do_key_event(VncState *vs, int down, int keycode, int sym)
1635 {
1636 /* QEMU console switch */
1637 switch(keycode) {
1638 case 0x2a: /* Left Shift */
1639 case 0x36: /* Right Shift */
1640 case 0x1d: /* Left CTRL */
1641 case 0x9d: /* Right CTRL */
1642 case 0x38: /* Left ALT */
1643 case 0xb8: /* Right ALT */
1644 if (down)
1645 vs->modifiers_state[keycode] = 1;
1646 else
1647 vs->modifiers_state[keycode] = 0;
1648 break;
1649 case 0x02 ... 0x0a: /* '1' to '9' keys */
1650 if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) {
1651 /* Reset the modifiers sent to the current console */
1652 reset_keys(vs);
1653 console_select(keycode - 0x02);
1654 return;
1655 }
1656 break;
1657 case 0x3a: /* CapsLock */
1658 case 0x45: /* NumLock */
1659 if (down)
1660 vs->modifiers_state[keycode] ^= 1;
1661 break;
1662 }
1663
1664 /* Turn off the lock state sync logic if the client support the led
1665 state extension.
1666 */
1667 if (down && vs->vd->lock_key_sync &&
1668 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) &&
1669 keycode_is_keypad(vs->vd->kbd_layout, keycode)) {
1670 /* If the numlock state needs to change then simulate an additional
1671 keypress before sending this one. This will happen if the user
1672 toggles numlock away from the VNC window.
1673 */
1674 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) {
1675 if (!vs->modifiers_state[0x45]) {
1676 trace_vnc_key_sync_numlock(true);
1677 vs->modifiers_state[0x45] = 1;
1678 press_key(vs, 0xff7f);
1679 }
1680 } else {
1681 if (vs->modifiers_state[0x45]) {
1682 trace_vnc_key_sync_numlock(false);
1683 vs->modifiers_state[0x45] = 0;
1684 press_key(vs, 0xff7f);
1685 }
1686 }
1687 }
1688
1689 if (down && vs->vd->lock_key_sync &&
1690 !vnc_has_feature(vs, VNC_FEATURE_LED_STATE) &&
1691 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) {
1692 /* If the capslock state needs to change then simulate an additional
1693 keypress before sending this one. This will happen if the user
1694 toggles capslock away from the VNC window.
1695 */
1696 int uppercase = !!(sym >= 'A' && sym <= 'Z');
1697 int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]);
1698 int capslock = !!(vs->modifiers_state[0x3a]);
1699 if (capslock) {
1700 if (uppercase == shift) {
1701 trace_vnc_key_sync_capslock(false);
1702 vs->modifiers_state[0x3a] = 0;
1703 press_key(vs, 0xffe5);
1704 }
1705 } else {
1706 if (uppercase != shift) {
1707 trace_vnc_key_sync_capslock(true);
1708 vs->modifiers_state[0x3a] = 1;
1709 press_key(vs, 0xffe5);
1710 }
1711 }
1712 }
1713
1714 if (qemu_console_is_graphic(NULL)) {
1715 qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, down);
1716 } else {
1717 bool numlock = vs->modifiers_state[0x45];
1718 bool control = (vs->modifiers_state[0x1d] ||
1719 vs->modifiers_state[0x9d]);
1720 /* QEMU console emulation */
1721 if (down) {
1722 switch (keycode) {
1723 case 0x2a: /* Left Shift */
1724 case 0x36: /* Right Shift */
1725 case 0x1d: /* Left CTRL */
1726 case 0x9d: /* Right CTRL */
1727 case 0x38: /* Left ALT */
1728 case 0xb8: /* Right ALT */
1729 break;
1730 case 0xc8:
1731 kbd_put_keysym(QEMU_KEY_UP);
1732 break;
1733 case 0xd0:
1734 kbd_put_keysym(QEMU_KEY_DOWN);
1735 break;
1736 case 0xcb:
1737 kbd_put_keysym(QEMU_KEY_LEFT);
1738 break;
1739 case 0xcd:
1740 kbd_put_keysym(QEMU_KEY_RIGHT);
1741 break;
1742 case 0xd3:
1743 kbd_put_keysym(QEMU_KEY_DELETE);
1744 break;
1745 case 0xc7:
1746 kbd_put_keysym(QEMU_KEY_HOME);
1747 break;
1748 case 0xcf:
1749 kbd_put_keysym(QEMU_KEY_END);
1750 break;
1751 case 0xc9:
1752 kbd_put_keysym(QEMU_KEY_PAGEUP);
1753 break;
1754 case 0xd1:
1755 kbd_put_keysym(QEMU_KEY_PAGEDOWN);
1756 break;
1757
1758 case 0x47:
1759 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME);
1760 break;
1761 case 0x48:
1762 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP);
1763 break;
1764 case 0x49:
1765 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP);
1766 break;
1767 case 0x4b:
1768 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT);
1769 break;
1770 case 0x4c:
1771 kbd_put_keysym('5');
1772 break;
1773 case 0x4d:
1774 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT);
1775 break;
1776 case 0x4f:
1777 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END);
1778 break;
1779 case 0x50:
1780 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN);
1781 break;
1782 case 0x51:
1783 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN);
1784 break;
1785 case 0x52:
1786 kbd_put_keysym('0');
1787 break;
1788 case 0x53:
1789 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE);
1790 break;
1791
1792 case 0xb5:
1793 kbd_put_keysym('/');
1794 break;
1795 case 0x37:
1796 kbd_put_keysym('*');
1797 break;
1798 case 0x4a:
1799 kbd_put_keysym('-');
1800 break;
1801 case 0x4e:
1802 kbd_put_keysym('+');
1803 break;
1804 case 0x9c:
1805 kbd_put_keysym('\n');
1806 break;
1807
1808 default:
1809 if (control) {
1810 kbd_put_keysym(sym & 0x1f);
1811 } else {
1812 kbd_put_keysym(sym);
1813 }
1814 break;
1815 }
1816 }
1817 }
1818 }
1819
1820 static void vnc_release_modifiers(VncState *vs)
1821 {
1822 static const int keycodes[] = {
1823 /* shift, control, alt keys, both left & right */
1824 0x2a, 0x36, 0x1d, 0x9d, 0x38, 0xb8,
1825 };
1826 int i, keycode;
1827
1828 if (!qemu_console_is_graphic(NULL)) {
1829 return;
1830 }
1831 for (i = 0; i < ARRAY_SIZE(keycodes); i++) {
1832 keycode = keycodes[i];
1833 if (!vs->modifiers_state[keycode]) {
1834 continue;
1835 }
1836 qemu_input_event_send_key_number(vs->vd->dcl.con, keycode, false);
1837 }
1838 }
1839
1840 static const char *code2name(int keycode)
1841 {
1842 return QKeyCode_lookup[qemu_input_key_number_to_qcode(keycode)];
1843 }
1844
1845 static void key_event(VncState *vs, int down, uint32_t sym)
1846 {
1847 int keycode;
1848 int lsym = sym;
1849
1850 if (lsym >= 'A' && lsym <= 'Z' && qemu_console_is_graphic(NULL)) {
1851 lsym = lsym - 'A' + 'a';
1852 }
1853
1854 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF) & SCANCODE_KEYMASK;
1855 trace_vnc_key_event_map(down, sym, keycode, code2name(keycode));
1856 do_key_event(vs, down, keycode, sym);
1857 }
1858
1859 static void ext_key_event(VncState *vs, int down,
1860 uint32_t sym, uint16_t keycode)
1861 {
1862 /* if the user specifies a keyboard layout, always use it */
1863 if (keyboard_layout) {
1864 key_event(vs, down, sym);
1865 } else {
1866 trace_vnc_key_event_ext(down, sym, keycode, code2name(keycode));
1867 do_key_event(vs, down, keycode, sym);
1868 }
1869 }
1870
1871 static void framebuffer_update_request(VncState *vs, int incremental,
1872 int x, int y, int w, int h)
1873 {
1874 int width = pixman_image_get_width(vs->vd->server);
1875 int height = pixman_image_get_height(vs->vd->server);
1876
1877 vs->need_update = 1;
1878
1879 if (incremental) {
1880 return;
1881 }
1882
1883 vs->force_update = 1;
1884 vnc_set_area_dirty(vs->dirty, width, height, x, y, w, h);
1885 }
1886
1887 static void send_ext_key_event_ack(VncState *vs)
1888 {
1889 vnc_lock_output(vs);
1890 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1891 vnc_write_u8(vs, 0);
1892 vnc_write_u16(vs, 1);
1893 vnc_framebuffer_update(vs, 0, 0,
1894 pixman_image_get_width(vs->vd->server),
1895 pixman_image_get_height(vs->vd->server),
1896 VNC_ENCODING_EXT_KEY_EVENT);
1897 vnc_unlock_output(vs);
1898 vnc_flush(vs);
1899 }
1900
1901 static void send_ext_audio_ack(VncState *vs)
1902 {
1903 vnc_lock_output(vs);
1904 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1905 vnc_write_u8(vs, 0);
1906 vnc_write_u16(vs, 1);
1907 vnc_framebuffer_update(vs, 0, 0,
1908 pixman_image_get_width(vs->vd->server),
1909 pixman_image_get_height(vs->vd->server),
1910 VNC_ENCODING_AUDIO);
1911 vnc_unlock_output(vs);
1912 vnc_flush(vs);
1913 }
1914
1915 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
1916 {
1917 int i;
1918 unsigned int enc = 0;
1919
1920 vs->features = 0;
1921 vs->vnc_encoding = 0;
1922 vs->tight.compression = 9;
1923 vs->tight.quality = -1; /* Lossless by default */
1924 vs->absolute = -1;
1925
1926 /*
1927 * Start from the end because the encodings are sent in order of preference.
1928 * This way the preferred encoding (first encoding defined in the array)
1929 * will be set at the end of the loop.
1930 */
1931 for (i = n_encodings - 1; i >= 0; i--) {
1932 enc = encodings[i];
1933 switch (enc) {
1934 case VNC_ENCODING_RAW:
1935 vs->vnc_encoding = enc;
1936 break;
1937 case VNC_ENCODING_COPYRECT:
1938 vs->features |= VNC_FEATURE_COPYRECT_MASK;
1939 break;
1940 case VNC_ENCODING_HEXTILE:
1941 vs->features |= VNC_FEATURE_HEXTILE_MASK;
1942 vs->vnc_encoding = enc;
1943 break;
1944 case VNC_ENCODING_TIGHT:
1945 vs->features |= VNC_FEATURE_TIGHT_MASK;
1946 vs->vnc_encoding = enc;
1947 break;
1948 #ifdef CONFIG_VNC_PNG
1949 case VNC_ENCODING_TIGHT_PNG:
1950 vs->features |= VNC_FEATURE_TIGHT_PNG_MASK;
1951 vs->vnc_encoding = enc;
1952 break;
1953 #endif
1954 case VNC_ENCODING_ZLIB:
1955 vs->features |= VNC_FEATURE_ZLIB_MASK;
1956 vs->vnc_encoding = enc;
1957 break;
1958 case VNC_ENCODING_ZRLE:
1959 vs->features |= VNC_FEATURE_ZRLE_MASK;
1960 vs->vnc_encoding = enc;
1961 break;
1962 case VNC_ENCODING_ZYWRLE:
1963 vs->features |= VNC_FEATURE_ZYWRLE_MASK;
1964 vs->vnc_encoding = enc;
1965 break;
1966 case VNC_ENCODING_DESKTOPRESIZE:
1967 vs->features |= VNC_FEATURE_RESIZE_MASK;
1968 break;
1969 case VNC_ENCODING_POINTER_TYPE_CHANGE:
1970 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK;
1971 break;
1972 case VNC_ENCODING_RICH_CURSOR:
1973 vs->features |= VNC_FEATURE_RICH_CURSOR_MASK;
1974 break;
1975 case VNC_ENCODING_EXT_KEY_EVENT:
1976 send_ext_key_event_ack(vs);
1977 break;
1978 case VNC_ENCODING_AUDIO:
1979 send_ext_audio_ack(vs);
1980 break;
1981 case VNC_ENCODING_WMVi:
1982 vs->features |= VNC_FEATURE_WMVI_MASK;
1983 break;
1984 case VNC_ENCODING_LED_STATE:
1985 vs->features |= VNC_FEATURE_LED_STATE_MASK;
1986 break;
1987 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9:
1988 vs->tight.compression = (enc & 0x0F);
1989 break;
1990 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9:
1991 if (vs->vd->lossy) {
1992 vs->tight.quality = (enc & 0x0F);
1993 }
1994 break;
1995 default:
1996 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc);
1997 break;
1998 }
1999 }
2000 vnc_desktop_resize(vs);
2001 check_pointer_type_change(&vs->mouse_mode_notifier, NULL);
2002 vnc_led_state_change(vs);
2003 }
2004
2005 static void set_pixel_conversion(VncState *vs)
2006 {
2007 pixman_format_code_t fmt = qemu_pixman_get_format(&vs->client_pf);
2008
2009 if (fmt == VNC_SERVER_FB_FORMAT) {
2010 vs->write_pixels = vnc_write_pixels_copy;
2011 vnc_hextile_set_pixel_conversion(vs, 0);
2012 } else {
2013 vs->write_pixels = vnc_write_pixels_generic;
2014 vnc_hextile_set_pixel_conversion(vs, 1);
2015 }
2016 }
2017
2018 static void set_pixel_format(VncState *vs,
2019 int bits_per_pixel, int depth,
2020 int big_endian_flag, int true_color_flag,
2021 int red_max, int green_max, int blue_max,
2022 int red_shift, int green_shift, int blue_shift)
2023 {
2024 if (!true_color_flag) {
2025 vnc_client_error(vs);
2026 return;
2027 }
2028
2029 switch (bits_per_pixel) {
2030 case 8:
2031 case 16:
2032 case 32:
2033 break;
2034 default:
2035 vnc_client_error(vs);
2036 return;
2037 }
2038
2039 vs->client_pf.rmax = red_max;
2040 vs->client_pf.rbits = hweight_long(red_max);
2041 vs->client_pf.rshift = red_shift;
2042 vs->client_pf.rmask = red_max << red_shift;
2043 vs->client_pf.gmax = green_max;
2044 vs->client_pf.gbits = hweight_long(green_max);
2045 vs->client_pf.gshift = green_shift;
2046 vs->client_pf.gmask = green_max << green_shift;
2047 vs->client_pf.bmax = blue_max;
2048 vs->client_pf.bbits = hweight_long(blue_max);
2049 vs->client_pf.bshift = blue_shift;
2050 vs->client_pf.bmask = blue_max << blue_shift;
2051 vs->client_pf.bits_per_pixel = bits_per_pixel;
2052 vs->client_pf.bytes_per_pixel = bits_per_pixel / 8;
2053 vs->client_pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel;
2054 vs->client_be = big_endian_flag;
2055
2056 set_pixel_conversion(vs);
2057
2058 graphic_hw_invalidate(NULL);
2059 graphic_hw_update(NULL);
2060 }
2061
2062 static void pixel_format_message (VncState *vs) {
2063 char pad[3] = { 0, 0, 0 };
2064
2065 vs->client_pf = qemu_default_pixelformat(32);
2066
2067 vnc_write_u8(vs, vs->client_pf.bits_per_pixel); /* bits-per-pixel */
2068 vnc_write_u8(vs, vs->client_pf.depth); /* depth */
2069
2070 #ifdef HOST_WORDS_BIGENDIAN
2071 vnc_write_u8(vs, 1); /* big-endian-flag */
2072 #else
2073 vnc_write_u8(vs, 0); /* big-endian-flag */
2074 #endif
2075 vnc_write_u8(vs, 1); /* true-color-flag */
2076 vnc_write_u16(vs, vs->client_pf.rmax); /* red-max */
2077 vnc_write_u16(vs, vs->client_pf.gmax); /* green-max */
2078 vnc_write_u16(vs, vs->client_pf.bmax); /* blue-max */
2079 vnc_write_u8(vs, vs->client_pf.rshift); /* red-shift */
2080 vnc_write_u8(vs, vs->client_pf.gshift); /* green-shift */
2081 vnc_write_u8(vs, vs->client_pf.bshift); /* blue-shift */
2082 vnc_write(vs, pad, 3); /* padding */
2083
2084 vnc_hextile_set_pixel_conversion(vs, 0);
2085 vs->write_pixels = vnc_write_pixels_copy;
2086 }
2087
2088 static void vnc_colordepth(VncState *vs)
2089 {
2090 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) {
2091 /* Sending a WMVi message to notify the client*/
2092 vnc_lock_output(vs);
2093 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
2094 vnc_write_u8(vs, 0);
2095 vnc_write_u16(vs, 1); /* number of rects */
2096 vnc_framebuffer_update(vs, 0, 0,
2097 pixman_image_get_width(vs->vd->server),
2098 pixman_image_get_height(vs->vd->server),
2099 VNC_ENCODING_WMVi);
2100 pixel_format_message(vs);
2101 vnc_unlock_output(vs);
2102 vnc_flush(vs);
2103 } else {
2104 set_pixel_conversion(vs);
2105 }
2106 }
2107
2108 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
2109 {
2110 int i;
2111 uint16_t limit;
2112 VncDisplay *vd = vs->vd;
2113
2114 if (data[0] > 3) {
2115 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE);
2116 }
2117
2118 switch (data[0]) {
2119 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT:
2120 if (len == 1)
2121 return 20;
2122
2123 set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5),
2124 read_u8(data, 6), read_u8(data, 7),
2125 read_u16(data, 8), read_u16(data, 10),
2126 read_u16(data, 12), read_u8(data, 14),
2127 read_u8(data, 15), read_u8(data, 16));
2128 break;
2129 case VNC_MSG_CLIENT_SET_ENCODINGS:
2130 if (len == 1)
2131 return 4;
2132
2133 if (len == 4) {
2134 limit = read_u16(data, 2);
2135 if (limit > 0)
2136 return 4 + (limit * 4);
2137 } else
2138 limit = read_u16(data, 2);
2139
2140 for (i = 0; i < limit; i++) {
2141 int32_t val = read_s32(data, 4 + (i * 4));
2142 memcpy(data + 4 + (i * 4), &val, sizeof(val));
2143 }
2144
2145 set_encodings(vs, (int32_t *)(data + 4), limit);
2146 break;
2147 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST:
2148 if (len == 1)
2149 return 10;
2150
2151 framebuffer_update_request(vs,
2152 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4),
2153 read_u16(data, 6), read_u16(data, 8));
2154 break;
2155 case VNC_MSG_CLIENT_KEY_EVENT:
2156 if (len == 1)
2157 return 8;
2158
2159 key_event(vs, read_u8(data, 1), read_u32(data, 4));
2160 break;
2161 case VNC_MSG_CLIENT_POINTER_EVENT:
2162 if (len == 1)
2163 return 6;
2164
2165 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
2166 break;
2167 case VNC_MSG_CLIENT_CUT_TEXT:
2168 if (len == 1) {
2169 return 8;
2170 }
2171 if (len == 8) {
2172 uint32_t dlen = read_u32(data, 4);
2173 if (dlen > (1 << 20)) {
2174 error_report("vnc: client_cut_text msg payload has %u bytes"
2175 " which exceeds our limit of 1MB.", dlen);
2176 vnc_client_error(vs);
2177 break;
2178 }
2179 if (dlen > 0) {
2180 return 8 + dlen;
2181 }
2182 }
2183
2184 client_cut_text(vs, read_u32(data, 4), data + 8);
2185 break;
2186 case VNC_MSG_CLIENT_QEMU:
2187 if (len == 1)
2188 return 2;
2189
2190 switch (read_u8(data, 1)) {
2191 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT:
2192 if (len == 2)
2193 return 12;
2194
2195 ext_key_event(vs, read_u16(data, 2),
2196 read_u32(data, 4), read_u32(data, 8));
2197 break;
2198 case VNC_MSG_CLIENT_QEMU_AUDIO:
2199 if (len == 2)
2200 return 4;
2201
2202 switch (read_u16 (data, 2)) {
2203 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE:
2204 audio_add(vs);
2205 break;
2206 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE:
2207 audio_del(vs);
2208 break;
2209 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT:
2210 if (len == 4)
2211 return 10;
2212 switch (read_u8(data, 4)) {
2213 case 0: vs->as.fmt = AUD_FMT_U8; break;
2214 case 1: vs->as.fmt = AUD_FMT_S8; break;
2215 case 2: vs->as.fmt = AUD_FMT_U16; break;
2216 case 3: vs->as.fmt = AUD_FMT_S16; break;
2217 case 4: vs->as.fmt = AUD_FMT_U32; break;
2218 case 5: vs->as.fmt = AUD_FMT_S32; break;
2219 default:
2220 printf("Invalid audio format %d\n", read_u8(data, 4));
2221 vnc_client_error(vs);
2222 break;
2223 }
2224 vs->as.nchannels = read_u8(data, 5);
2225 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) {
2226 printf("Invalid audio channel coount %d\n",
2227 read_u8(data, 5));
2228 vnc_client_error(vs);
2229 break;
2230 }
2231 vs->as.freq = read_u32(data, 6);
2232 break;
2233 default:
2234 printf ("Invalid audio message %d\n", read_u8(data, 4));
2235 vnc_client_error(vs);
2236 break;
2237 }
2238 break;
2239
2240 default:
2241 printf("Msg: %d\n", read_u16(data, 0));
2242 vnc_client_error(vs);
2243 break;
2244 }
2245 break;
2246 default:
2247 printf("Msg: %d\n", data[0]);
2248 vnc_client_error(vs);
2249 break;
2250 }
2251
2252 vnc_read_when(vs, protocol_client_msg, 1);
2253 return 0;
2254 }
2255
2256 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
2257 {
2258 char buf[1024];
2259 VncShareMode mode;
2260 int size;
2261
2262 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE;
2263 switch (vs->vd->share_policy) {
2264 case VNC_SHARE_POLICY_IGNORE:
2265 /*
2266 * Ignore the shared flag. Nothing to do here.
2267 *
2268 * Doesn't conform to the rfb spec but is traditional qemu
2269 * behavior, thus left here as option for compatibility
2270 * reasons.
2271 */
2272 break;
2273 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE:
2274 /*
2275 * Policy: Allow clients ask for exclusive access.
2276 *
2277 * Implementation: When a client asks for exclusive access,
2278 * disconnect all others. Shared connects are allowed as long
2279 * as no exclusive connection exists.
2280 *
2281 * This is how the rfb spec suggests to handle the shared flag.
2282 */
2283 if (mode == VNC_SHARE_MODE_EXCLUSIVE) {
2284 VncState *client;
2285 QTAILQ_FOREACH(client, &vs->vd->clients, next) {
2286 if (vs == client) {
2287 continue;
2288 }
2289 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE &&
2290 client->share_mode != VNC_SHARE_MODE_SHARED) {
2291 continue;
2292 }
2293 vnc_disconnect_start(client);
2294 }
2295 }
2296 if (mode == VNC_SHARE_MODE_SHARED) {
2297 if (vs->vd->num_exclusive > 0) {
2298 vnc_disconnect_start(vs);
2299 return 0;
2300 }
2301 }
2302 break;
2303 case VNC_SHARE_POLICY_FORCE_SHARED:
2304 /*
2305 * Policy: Shared connects only.
2306 * Implementation: Disallow clients asking for exclusive access.
2307 *
2308 * Useful for shared desktop sessions where you don't want
2309 * someone forgetting to say -shared when running the vnc
2310 * client disconnect everybody else.
2311 */
2312 if (mode == VNC_SHARE_MODE_EXCLUSIVE) {
2313 vnc_disconnect_start(vs);
2314 return 0;
2315 }
2316 break;
2317 }
2318 vnc_set_share_mode(vs, mode);
2319
2320 vs->client_width = pixman_image_get_width(vs->vd->server);
2321 vs->client_height = pixman_image_get_height(vs->vd->server);
2322 vnc_write_u16(vs, vs->client_width);
2323 vnc_write_u16(vs, vs->client_height);
2324
2325 pixel_format_message(vs);
2326
2327 if (qemu_name)
2328 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name);
2329 else
2330 size = snprintf(buf, sizeof(buf), "QEMU");
2331
2332 vnc_write_u32(vs, size);
2333 vnc_write(vs, buf, size);
2334 vnc_flush(vs);
2335
2336 vnc_client_cache_auth(vs);
2337 vnc_qmp_event(vs, QAPI_EVENT_VNC_INITIALIZED);
2338
2339 vnc_read_when(vs, protocol_client_msg, 1);
2340
2341 return 0;
2342 }
2343
2344 void start_client_init(VncState *vs)
2345 {
2346 vnc_read_when(vs, protocol_client_init, 1);
2347 }
2348
2349 static void make_challenge(VncState *vs)
2350 {
2351 int i;
2352
2353 srand(time(NULL)+getpid()+getpid()*987654+rand());
2354
2355 for (i = 0 ; i < sizeof(vs->challenge) ; i++)
2356 vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0));
2357 }
2358
2359 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
2360 {
2361 unsigned char response[VNC_AUTH_CHALLENGE_SIZE];
2362 int i, j, pwlen;
2363 unsigned char key[8];
2364 time_t now = time(NULL);
2365
2366 if (!vs->vd->password) {
2367 VNC_DEBUG("No password configured on server");
2368 goto reject;
2369 }
2370 if (vs->vd->expires < now) {
2371 VNC_DEBUG("Password is expired");
2372 goto reject;
2373 }
2374
2375 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
2376
2377 /* Calculate the expected challenge response */
2378 pwlen = strlen(vs->vd->password);
2379 for (i=0; i<sizeof(key); i++)
2380 key[i] = i<pwlen ? vs->vd->password[i] : 0;
2381 deskey(key, EN0);
2382 for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
2383 des(response+j, response+j);
2384
2385 /* Compare expected vs actual challenge response */
2386 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) {
2387 VNC_DEBUG("Client challenge response did not match\n");
2388 goto reject;
2389 } else {
2390 VNC_DEBUG("Accepting VNC challenge response\n");
2391 vnc_write_u32(vs, 0); /* Accept auth */
2392 vnc_flush(vs);
2393
2394 start_client_init(vs);
2395 }
2396 return 0;
2397
2398 reject:
2399 vnc_write_u32(vs, 1); /* Reject auth */
2400 if (vs->minor >= 8) {
2401 static const char err[] = "Authentication failed";
2402 vnc_write_u32(vs, sizeof(err));
2403 vnc_write(vs, err, sizeof(err));
2404 }
2405 vnc_flush(vs);
2406 vnc_client_error(vs);
2407 return 0;
2408 }
2409
2410 void start_auth_vnc(VncState *vs)
2411 {
2412 make_challenge(vs);
2413 /* Send client a 'random' challenge */
2414 vnc_write(vs, vs->challenge, sizeof(vs->challenge));
2415 vnc_flush(vs);
2416
2417 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
2418 }
2419
2420
2421 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
2422 {
2423 /* We only advertise 1 auth scheme at a time, so client
2424 * must pick the one we sent. Verify this */
2425 if (data[0] != vs->auth) { /* Reject auth */
2426 VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]);
2427 vnc_write_u32(vs, 1);
2428 if (vs->minor >= 8) {
2429 static const char err[] = "Authentication failed";
2430 vnc_write_u32(vs, sizeof(err));
2431 vnc_write(vs, err, sizeof(err));
2432 }
2433 vnc_client_error(vs);
2434 } else { /* Accept requested auth */
2435 VNC_DEBUG("Client requested auth %d\n", (int)data[0]);
2436 switch (vs->auth) {
2437 case VNC_AUTH_NONE:
2438 VNC_DEBUG("Accept auth none\n");
2439 if (vs->minor >= 8) {
2440 vnc_write_u32(vs, 0); /* Accept auth completion */
2441 vnc_flush(vs);
2442 }
2443 start_client_init(vs);
2444 break;
2445
2446 case VNC_AUTH_VNC:
2447 VNC_DEBUG("Start VNC auth\n");
2448 start_auth_vnc(vs);
2449 break;
2450
2451 #ifdef CONFIG_VNC_TLS
2452 case VNC_AUTH_VENCRYPT:
2453 VNC_DEBUG("Accept VeNCrypt auth\n");
2454 start_auth_vencrypt(vs);
2455 break;
2456 #endif /* CONFIG_VNC_TLS */
2457
2458 #ifdef CONFIG_VNC_SASL
2459 case VNC_AUTH_SASL:
2460 VNC_DEBUG("Accept SASL auth\n");
2461 start_auth_sasl(vs);
2462 break;
2463 #endif /* CONFIG_VNC_SASL */
2464
2465 default: /* Should not be possible, but just in case */
2466 VNC_DEBUG("Reject auth %d server code bug\n", vs->auth);
2467 vnc_write_u8(vs, 1);
2468 if (vs->minor >= 8) {
2469 static const char err[] = "Authentication failed";
2470 vnc_write_u32(vs, sizeof(err));
2471 vnc_write(vs, err, sizeof(err));
2472 }
2473 vnc_client_error(vs);
2474 }
2475 }
2476 return 0;
2477 }
2478
2479 static int protocol_version(VncState *vs, uint8_t *version, size_t len)
2480 {
2481 char local[13];
2482
2483 memcpy(local, version, 12);
2484 local[12] = 0;
2485
2486 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) {
2487 VNC_DEBUG("Malformed protocol version %s\n", local);
2488 vnc_client_error(vs);
2489 return 0;
2490 }
2491 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
2492 if (vs->major != 3 ||
2493 (vs->minor != 3 &&
2494 vs->minor != 4 &&
2495 vs->minor != 5 &&
2496 vs->minor != 7 &&
2497 vs->minor != 8)) {
2498 VNC_DEBUG("Unsupported client version\n");
2499 vnc_write_u32(vs, VNC_AUTH_INVALID);
2500 vnc_flush(vs);
2501 vnc_client_error(vs);
2502 return 0;
2503 }
2504 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated
2505 * as equivalent to v3.3 by servers
2506 */
2507 if (vs->minor == 4 || vs->minor == 5)
2508 vs->minor = 3;
2509
2510 if (vs->minor == 3) {
2511 if (vs->auth == VNC_AUTH_NONE) {
2512 VNC_DEBUG("Tell client auth none\n");
2513 vnc_write_u32(vs, vs->auth);
2514 vnc_flush(vs);
2515 start_client_init(vs);
2516 } else if (vs->auth == VNC_AUTH_VNC) {
2517 VNC_DEBUG("Tell client VNC auth\n");
2518 vnc_write_u32(vs, vs->auth);
2519 vnc_flush(vs);
2520 start_auth_vnc(vs);
2521 } else {
2522 VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth);
2523 vnc_write_u32(vs, VNC_AUTH_INVALID);
2524 vnc_flush(vs);
2525 vnc_client_error(vs);
2526 }
2527 } else {
2528 VNC_DEBUG("Telling client we support auth %d\n", vs->auth);
2529 vnc_write_u8(vs, 1); /* num auth */
2530 vnc_write_u8(vs, vs->auth);
2531 vnc_read_when(vs, protocol_client_auth, 1);
2532 vnc_flush(vs);
2533 }
2534
2535 return 0;
2536 }
2537
2538 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y)
2539 {
2540 struct VncSurface *vs = &vd->guest;
2541
2542 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT];
2543 }
2544
2545 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h)
2546 {
2547 int i, j;
2548
2549 w = (x + w) / VNC_STAT_RECT;
2550 h = (y + h) / VNC_STAT_RECT;
2551 x /= VNC_STAT_RECT;
2552 y /= VNC_STAT_RECT;
2553
2554 for (j = y; j <= h; j++) {
2555 for (i = x; i <= w; i++) {
2556 vs->lossy_rect[j][i] = 1;
2557 }
2558 }
2559 }
2560
2561 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y)
2562 {
2563 VncState *vs;
2564 int sty = y / VNC_STAT_RECT;
2565 int stx = x / VNC_STAT_RECT;
2566 int has_dirty = 0;
2567
2568 y = y / VNC_STAT_RECT * VNC_STAT_RECT;
2569 x = x / VNC_STAT_RECT * VNC_STAT_RECT;
2570
2571 QTAILQ_FOREACH(vs, &vd->clients, next) {
2572 int j;
2573
2574 /* kernel send buffers are full -> refresh later */
2575 if (vs->output.offset) {
2576 continue;
2577 }
2578
2579 if (!vs->lossy_rect[sty][stx]) {
2580 continue;
2581 }
2582
2583 vs->lossy_rect[sty][stx] = 0;
2584 for (j = 0; j < VNC_STAT_RECT; ++j) {
2585 bitmap_set(vs->dirty[y + j],
2586 x / VNC_DIRTY_PIXELS_PER_BIT,
2587 VNC_STAT_RECT / VNC_DIRTY_PIXELS_PER_BIT);
2588 }
2589 has_dirty++;
2590 }
2591
2592 return has_dirty;
2593 }
2594
2595 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv)
2596 {
2597 int width = pixman_image_get_width(vd->guest.fb);
2598 int height = pixman_image_get_height(vd->guest.fb);
2599 int x, y;
2600 struct timeval res;
2601 int has_dirty = 0;
2602
2603 for (y = 0; y < height; y += VNC_STAT_RECT) {
2604 for (x = 0; x < width; x += VNC_STAT_RECT) {
2605 VncRectStat *rect = vnc_stat_rect(vd, x, y);
2606
2607 rect->updated = false;
2608 }
2609 }
2610
2611 qemu_timersub(tv, &VNC_REFRESH_STATS, &res);
2612
2613 if (timercmp(&vd->guest.last_freq_check, &res, >)) {
2614 return has_dirty;
2615 }
2616 vd->guest.last_freq_check = *tv;
2617
2618 for (y = 0; y < height; y += VNC_STAT_RECT) {
2619 for (x = 0; x < width; x += VNC_STAT_RECT) {
2620 VncRectStat *rect= vnc_stat_rect(vd, x, y);
2621 int count = ARRAY_SIZE(rect->times);
2622 struct timeval min, max;
2623
2624 if (!timerisset(&rect->times[count - 1])) {
2625 continue ;
2626 }
2627
2628 max = rect->times[(rect->idx + count - 1) % count];
2629 qemu_timersub(tv, &max, &res);
2630
2631 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) {
2632 rect->freq = 0;
2633 has_dirty += vnc_refresh_lossy_rect(vd, x, y);
2634 memset(rect->times, 0, sizeof (rect->times));
2635 continue ;
2636 }
2637
2638 min = rect->times[rect->idx];
2639 max = rect->times[(rect->idx + count - 1) % count];
2640 qemu_timersub(&max, &min, &res);
2641
2642 rect->freq = res.tv_sec + res.tv_usec / 1000000.;
2643 rect->freq /= count;
2644 rect->freq = 1. / rect->freq;
2645 }
2646 }
2647 return has_dirty;
2648 }
2649
2650 double vnc_update_freq(VncState *vs, int x, int y, int w, int h)
2651 {
2652 int i, j;
2653 double total = 0;
2654 int num = 0;
2655
2656 x = (x / VNC_STAT_RECT) * VNC_STAT_RECT;
2657 y = (y / VNC_STAT_RECT) * VNC_STAT_RECT;
2658
2659 for (j = y; j <= y + h; j += VNC_STAT_RECT) {
2660 for (i = x; i <= x + w; i += VNC_STAT_RECT) {
2661 total += vnc_stat_rect(vs->vd, i, j)->freq;
2662 num++;
2663 }
2664 }
2665
2666 if (num) {
2667 return total / num;
2668 } else {
2669 return 0;
2670 }
2671 }
2672
2673 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv)
2674 {
2675 VncRectStat *rect;
2676
2677 rect = vnc_stat_rect(vd, x, y);
2678 if (rect->updated) {
2679 return ;
2680 }
2681 rect->times[rect->idx] = *tv;
2682 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times);
2683 rect->updated = true;
2684 }
2685
2686 static int vnc_refresh_server_surface(VncDisplay *vd)
2687 {
2688 int width = MIN(pixman_image_get_width(vd->guest.fb),
2689 pixman_image_get_width(vd->server));
2690 int height = MIN(pixman_image_get_height(vd->guest.fb),
2691 pixman_image_get_height(vd->server));
2692 int cmp_bytes, server_stride, min_stride, guest_stride, y = 0;
2693 uint8_t *guest_row0 = NULL, *server_row0;
2694 VncState *vs;
2695 int has_dirty = 0;
2696 pixman_image_t *tmpbuf = NULL;
2697
2698 struct timeval tv = { 0, 0 };
2699
2700 if (!vd->non_adaptive) {
2701 gettimeofday(&tv, NULL);
2702 has_dirty = vnc_update_stats(vd, &tv);
2703 }
2704
2705 /*
2706 * Walk through the guest dirty map.
2707 * Check and copy modified bits from guest to server surface.
2708 * Update server dirty map.
2709 */
2710 server_row0 = (uint8_t *)pixman_image_get_data(vd->server);
2711 server_stride = guest_stride = pixman_image_get_stride(vd->server);
2712 cmp_bytes = MIN(VNC_DIRTY_PIXELS_PER_BIT * VNC_SERVER_FB_BYTES,
2713 server_stride);
2714 if (vd->guest.format != VNC_SERVER_FB_FORMAT) {
2715 int width = pixman_image_get_width(vd->server);
2716 tmpbuf = qemu_pixman_linebuf_create(VNC_SERVER_FB_FORMAT, width);
2717 } else {
2718 guest_row0 = (uint8_t *)pixman_image_get_data(vd->guest.fb);
2719 guest_stride = pixman_image_get_stride(vd->guest.fb);
2720 }
2721 min_stride = MIN(server_stride, guest_stride);
2722
2723 for (;;) {
2724 int x;
2725 uint8_t *guest_ptr, *server_ptr;
2726 unsigned long offset = find_next_bit((unsigned long *) &vd->guest.dirty,
2727 height * VNC_DIRTY_BPL(&vd->guest),
2728 y * VNC_DIRTY_BPL(&vd->guest));
2729 if (offset == height * VNC_DIRTY_BPL(&vd->guest)) {
2730 /* no more dirty bits */
2731 break;
2732 }
2733 y = offset / VNC_DIRTY_BPL(&vd->guest);
2734 x = offset % VNC_DIRTY_BPL(&vd->guest);
2735
2736 server_ptr = server_row0 + y * server_stride + x * cmp_bytes;
2737
2738 if (vd->guest.format != VNC_SERVER_FB_FORMAT) {
2739 qemu_pixman_linebuf_fill(tmpbuf, vd->guest.fb, width, 0, y);
2740 guest_ptr = (uint8_t *)pixman_image_get_data(tmpbuf);
2741 } else {
2742 guest_ptr = guest_row0 + y * guest_stride;
2743 }
2744 guest_ptr += x * cmp_bytes;
2745
2746 for (; x < DIV_ROUND_UP(width, VNC_DIRTY_PIXELS_PER_BIT);
2747 x++, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) {
2748 int _cmp_bytes = cmp_bytes;
2749 if (!test_and_clear_bit(x, vd->guest.dirty[y])) {
2750 continue;
2751 }
2752 if ((x + 1) * cmp_bytes > min_stride) {
2753 _cmp_bytes = min_stride - x * cmp_bytes;
2754 }
2755 if (memcmp(server_ptr, guest_ptr, _cmp_bytes) == 0) {
2756 continue;
2757 }
2758 memcpy(server_ptr, guest_ptr, _cmp_bytes);
2759 if (!vd->non_adaptive) {
2760 vnc_rect_updated(vd, x * VNC_DIRTY_PIXELS_PER_BIT,
2761 y, &tv);
2762 }
2763 QTAILQ_FOREACH(vs, &vd->clients, next) {
2764 set_bit(x, vs->dirty[y]);
2765 }
2766 has_dirty++;
2767 }
2768
2769 y++;
2770 }
2771 qemu_pixman_image_unref(tmpbuf);
2772 return has_dirty;
2773 }
2774
2775 static void vnc_refresh(DisplayChangeListener *dcl)
2776 {
2777 VncDisplay *vd = container_of(dcl, VncDisplay, dcl);
2778 VncState *vs, *vn;
2779 int has_dirty, rects = 0;
2780
2781 graphic_hw_update(NULL);
2782
2783 if (vnc_trylock_display(vd)) {
2784 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE);
2785 return;
2786 }
2787
2788 has_dirty = vnc_refresh_server_surface(vd);
2789 vnc_unlock_display(vd);
2790
2791 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
2792 rects += vnc_update_client(vs, has_dirty, false);
2793 /* vs might be free()ed here */
2794 }
2795
2796 if (QTAILQ_EMPTY(&vd->clients)) {
2797 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_MAX);
2798 return;
2799 }
2800
2801 if (has_dirty && rects) {
2802 vd->dcl.update_interval /= 2;
2803 if (vd->dcl.update_interval < VNC_REFRESH_INTERVAL_BASE) {
2804 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_BASE;
2805 }
2806 } else {
2807 vd->dcl.update_interval += VNC_REFRESH_INTERVAL_INC;
2808 if (vd->dcl.update_interval > VNC_REFRESH_INTERVAL_MAX) {
2809 vd->dcl.update_interval = VNC_REFRESH_INTERVAL_MAX;
2810 }
2811 }
2812 }
2813
2814 static void vnc_connect(VncDisplay *vd, int csock,
2815 bool skipauth, bool websocket)
2816 {
2817 VncState *vs = g_malloc0(sizeof(VncState));
2818 int i;
2819
2820 vs->csock = csock;
2821
2822 if (skipauth) {
2823 vs->auth = VNC_AUTH_NONE;
2824 #ifdef CONFIG_VNC_TLS
2825 vs->subauth = VNC_AUTH_INVALID;
2826 #endif
2827 } else {
2828 vs->auth = vd->auth;
2829 #ifdef CONFIG_VNC_TLS
2830 vs->subauth = vd->subauth;
2831 #endif
2832 }
2833
2834 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect));
2835 for (i = 0; i < VNC_STAT_ROWS; ++i) {
2836 vs->lossy_rect[i] = g_malloc0(VNC_STAT_COLS * sizeof (uint8_t));
2837 }
2838
2839 VNC_DEBUG("New client on socket %d\n", csock);
2840 update_displaychangelistener(&vd->dcl, VNC_REFRESH_INTERVAL_BASE);
2841 qemu_set_nonblock(vs->csock);
2842 #ifdef CONFIG_VNC_WS
2843 if (websocket) {
2844 vs->websocket = 1;
2845 #ifdef CONFIG_VNC_TLS
2846 if (vd->tls.x509cert) {
2847 qemu_set_fd_handler2(vs->csock, NULL, vncws_tls_handshake_peek,
2848 NULL, vs);
2849 } else
2850 #endif /* CONFIG_VNC_TLS */
2851 {
2852 qemu_set_fd_handler2(vs->csock, NULL, vncws_handshake_read,
2853 NULL, vs);
2854 }
2855 } else
2856 #endif /* CONFIG_VNC_WS */
2857 {
2858 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
2859 }
2860
2861 vnc_client_cache_addr(vs);
2862 vnc_qmp_event(vs, QAPI_EVENT_VNC_CONNECTED);
2863 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING);
2864
2865 vs->vd = vd;
2866
2867 #ifdef CONFIG_VNC_WS
2868 if (!vs->websocket)
2869 #endif
2870 {
2871 vnc_init_state(vs);
2872 }
2873 }
2874
2875 void vnc_init_state(VncState *vs)
2876 {
2877 vs->initialized = true;
2878 VncDisplay *vd = vs->vd;
2879
2880 vs->last_x = -1;
2881 vs->last_y = -1;
2882
2883 vs->as.freq = 44100;
2884 vs->as.nchannels = 2;
2885 vs->as.fmt = AUD_FMT_S16;
2886 vs->as.endianness = 0;
2887
2888 qemu_mutex_init(&vs->output_mutex);
2889 vs->bh = qemu_bh_new(vnc_jobs_bh, vs);
2890
2891 QTAILQ_INSERT_HEAD(&vd->clients, vs, next);
2892
2893 graphic_hw_update(NULL);
2894
2895 vnc_write(vs, "RFB 003.008\n", 12);
2896 vnc_flush(vs);
2897 vnc_read_when(vs, protocol_version, 12);
2898 reset_keys(vs);
2899 if (vs->vd->lock_key_sync)
2900 vs->led = qemu_add_led_event_handler(kbd_leds, vs);
2901
2902 vs->mouse_mode_notifier.notify = check_pointer_type_change;
2903 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
2904
2905 /* vs might be free()ed here */
2906 }
2907
2908 static void vnc_listen_read(void *opaque, bool websocket)
2909 {
2910 VncDisplay *vs = opaque;
2911 struct sockaddr_in addr;
2912 socklen_t addrlen = sizeof(addr);
2913 int csock;
2914
2915 /* Catch-up */
2916 graphic_hw_update(NULL);
2917 #ifdef CONFIG_VNC_WS
2918 if (websocket) {
2919 csock = qemu_accept(vs->lwebsock, (struct sockaddr *)&addr, &addrlen);
2920 } else
2921 #endif /* CONFIG_VNC_WS */
2922 {
2923 csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
2924 }
2925
2926 if (csock != -1) {
2927 socket_set_nodelay(csock);
2928 vnc_connect(vs, csock, false, websocket);
2929 }
2930 }
2931
2932 static void vnc_listen_regular_read(void *opaque)
2933 {
2934 vnc_listen_read(opaque, false);
2935 }
2936
2937 #ifdef CONFIG_VNC_WS
2938 static void vnc_listen_websocket_read(void *opaque)
2939 {
2940 vnc_listen_read(opaque, true);
2941 }
2942 #endif /* CONFIG_VNC_WS */
2943
2944 static const DisplayChangeListenerOps dcl_ops = {
2945 .dpy_name = "vnc",
2946 .dpy_refresh = vnc_refresh,
2947 .dpy_gfx_copy = vnc_dpy_copy,
2948 .dpy_gfx_update = vnc_dpy_update,
2949 .dpy_gfx_switch = vnc_dpy_switch,
2950 .dpy_mouse_set = vnc_mouse_set,
2951 .dpy_cursor_define = vnc_dpy_cursor_define,
2952 };
2953
2954 void vnc_display_init(DisplayState *ds)
2955 {
2956 VncDisplay *vs = g_malloc0(sizeof(*vs));
2957
2958 vnc_display = vs;
2959
2960 vs->lsock = -1;
2961 #ifdef CONFIG_VNC_WS
2962 vs->lwebsock = -1;
2963 #endif
2964
2965 QTAILQ_INIT(&vs->clients);
2966 vs->expires = TIME_MAX;
2967
2968 if (keyboard_layout) {
2969 trace_vnc_key_map_init(keyboard_layout);
2970 vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
2971 } else {
2972 vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
2973 }
2974
2975 if (!vs->kbd_layout)
2976 exit(1);
2977
2978 qemu_mutex_init(&vs->mutex);
2979 vnc_start_worker_thread();
2980
2981 vs->dcl.ops = &dcl_ops;
2982 register_displaychangelistener(&vs->dcl);
2983 }
2984
2985
2986 static void vnc_display_close(DisplayState *ds)
2987 {
2988 VncDisplay *vs = vnc_display;
2989
2990 if (!vs)
2991 return;
2992 g_free(vs->display);
2993 vs->display = NULL;
2994 if (vs->lsock != -1) {
2995 qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
2996 close(vs->lsock);
2997 vs->lsock = -1;
2998 }
2999 #ifdef CONFIG_VNC_WS
3000 g_free(vs->ws_display);
3001 vs->ws_display = NULL;
3002 if (vs->lwebsock != -1) {
3003 qemu_set_fd_handler2(vs->lwebsock, NULL, NULL, NULL, NULL);
3004 close(vs->lwebsock);
3005 vs->lwebsock = -1;
3006 }
3007 #endif /* CONFIG_VNC_WS */
3008 vs->auth = VNC_AUTH_INVALID;
3009 #ifdef CONFIG_VNC_TLS
3010 vs->subauth = VNC_AUTH_INVALID;
3011 vs->tls.x509verify = 0;
3012 #endif
3013 }
3014
3015 int vnc_display_password(DisplayState *ds, const char *password)
3016 {
3017 VncDisplay *vs = vnc_display;
3018
3019 if (!vs) {
3020 return -EINVAL;
3021 }
3022 if (vs->auth == VNC_AUTH_NONE) {
3023 error_printf_unless_qmp("If you want use passwords please enable "
3024 "password auth using '-vnc ${dpy},password'.");
3025 return -EINVAL;
3026 }
3027
3028 g_free(vs->password);
3029 vs->password = g_strdup(password);
3030
3031 return 0;
3032 }
3033
3034 int vnc_display_pw_expire(DisplayState *ds, time_t expires)
3035 {
3036 VncDisplay *vs = vnc_display;
3037
3038 if (!vs) {
3039 return -EINVAL;
3040 }
3041
3042 vs->expires = expires;
3043 return 0;
3044 }
3045
3046 char *vnc_display_local_addr(DisplayState *ds)
3047 {
3048 VncDisplay *vs = vnc_display;
3049
3050 return vnc_socket_local_addr("%s:%s", vs->lsock);
3051 }
3052
3053 void vnc_display_open(DisplayState *ds, const char *display, Error **errp)
3054 {
3055 VncDisplay *vs = vnc_display;
3056 const char *options;
3057 int password = 0;
3058 int reverse = 0;
3059 #ifdef CONFIG_VNC_TLS
3060 int tls = 0, x509 = 0;
3061 #endif
3062 #ifdef CONFIG_VNC_SASL
3063 int sasl = 0;
3064 int saslErr;
3065 #endif
3066 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
3067 int acl = 0;
3068 #endif
3069 int lock_key_sync = 1;
3070
3071 if (!vnc_display) {
3072 error_setg(errp, "VNC display not active");
3073 return;
3074 }
3075 vnc_display_close(ds);
3076 if (strcmp(display, "none") == 0)
3077 return;
3078
3079 vs->display = g_strdup(display);
3080 vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
3081
3082 options = display;
3083 while ((options = strchr(options, ','))) {
3084 options++;
3085 if (strncmp(options, "password", 8) == 0) {
3086 if (fips_get_state()) {
3087 error_setg(errp,
3088 "VNC password auth disabled due to FIPS mode, "
3089 "consider using the VeNCrypt or SASL authentication "
3090 "methods as an alternative");
3091 goto fail;
3092 }
3093 password = 1; /* Require password auth */
3094 } else if (strncmp(options, "reverse", 7) == 0) {
3095 reverse = 1;
3096 } else if (strncmp(options, "no-lock-key-sync", 16) == 0) {
3097 lock_key_sync = 0;
3098 #ifdef CONFIG_VNC_SASL
3099 } else if (strncmp(options, "sasl", 4) == 0) {
3100 sasl = 1; /* Require SASL auth */
3101 #endif
3102 #ifdef CONFIG_VNC_WS
3103 } else if (strncmp(options, "websocket", 9) == 0) {
3104 char *start, *end;
3105 vs->websocket = 1;
3106
3107 /* Check for 'websocket=<port>' */
3108 start = strchr(options, '=');
3109 end = strchr(options, ',');
3110 if (start && (!end || (start < end))) {
3111 int len = end ? end-(start+1) : strlen(start+1);
3112 if (len < 6) {
3113 /* extract the host specification from display */
3114 char *host = NULL, *port = NULL, *host_end = NULL;
3115 port = g_strndup(start + 1, len);
3116
3117 /* ipv6 hosts have colons */
3118 end = strchr(display, ',');
3119 host_end = g_strrstr_len(display, end - display, ":");
3120
3121 if (host_end) {
3122 host = g_strndup(display, host_end - display + 1);
3123 } else {
3124 host = g_strndup(":", 1);
3125 }
3126 vs->ws_display = g_strconcat(host, port, NULL);
3127 g_free(host);
3128 g_free(port);
3129 }
3130 }
3131 #endif /* CONFIG_VNC_WS */
3132 #ifdef CONFIG_VNC_TLS
3133 } else if (strncmp(options, "tls", 3) == 0) {
3134 tls = 1; /* Require TLS */
3135 } else if (strncmp(options, "x509", 4) == 0) {
3136 char *start, *end;
3137 x509 = 1; /* Require x509 certificates */
3138 if (strncmp(options, "x509verify", 10) == 0)
3139 vs->tls.x509verify = 1; /* ...and verify client certs */
3140
3141 /* Now check for 'x509=/some/path' postfix
3142 * and use that to setup x509 certificate/key paths */
3143 start = strchr(options, '=');
3144 end = strchr(options, ',');
3145 if (start && (!end || (start < end))) {
3146 int len = end ? end-(start+1) : strlen(start+1);
3147 char *path = g_strndup(start + 1, len);
3148
3149 VNC_DEBUG("Trying certificate path '%s'\n", path);
3150 if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
3151 error_setg(errp, "Failed to find x509 certificates/keys in %s", path);
3152 g_free(path);
3153 goto fail;
3154 }
3155 g_free(path);
3156 } else {
3157 error_setg(errp, "No certificate path provided");
3158 goto fail;
3159 }
3160 #endif
3161 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
3162 } else if (strncmp(options, "acl", 3) == 0) {
3163 acl = 1;
3164 #endif
3165 } else if (strncmp(options, "lossy", 5) == 0) {
3166 #ifdef CONFIG_VNC_JPEG
3167 vs->lossy = true;
3168 #endif
3169 } else if (strncmp(options, "non-adaptive", 12) == 0) {
3170 vs->non_adaptive = true;
3171 } else if (strncmp(options, "share=", 6) == 0) {
3172 if (strncmp(options+6, "ignore", 6) == 0) {
3173 vs->share_policy = VNC_SHARE_POLICY_IGNORE;
3174 } else if (strncmp(options+6, "allow-exclusive", 15) == 0) {
3175 vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
3176 } else if (strncmp(options+6, "force-shared", 12) == 0) {
3177 vs->share_policy = VNC_SHARE_POLICY_FORCE_SHARED;
3178 } else {
3179 error_setg(errp, "unknown vnc share= option");
3180 goto fail;
3181 }
3182 }
3183 }
3184
3185 /* adaptive updates are only used with tight encoding and
3186 * if lossy updates are enabled so we can disable all the
3187 * calculations otherwise */
3188 if (!vs->lossy) {
3189 vs->non_adaptive = true;
3190 }
3191
3192 #ifdef CONFIG_VNC_TLS
3193 if (acl && x509 && vs->tls.x509verify) {
3194 if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
3195 fprintf(stderr, "Failed to create x509 dname ACL\n");
3196 exit(1);
3197 }
3198 }
3199 #endif
3200 #ifdef CONFIG_VNC_SASL
3201 if (acl && sasl) {
3202 if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
3203 fprintf(stderr, "Failed to create username ACL\n");
3204 exit(1);
3205 }
3206 }
3207 #endif
3208
3209 /*
3210 * Combinations we support here:
3211 *
3212 * - no-auth (clear text, no auth)
3213 * - password (clear text, weak auth)
3214 * - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI)
3215 * - tls (encrypt, weak anonymous creds, no auth)
3216 * - tls + password (encrypt, weak anonymous creds, weak auth)
3217 * - tls + sasl (encrypt, weak anonymous creds, good auth)
3218 * - tls + x509 (encrypt, good x509 creds, no auth)
3219 * - tls + x509 + password (encrypt, good x509 creds, weak auth)
3220 * - tls + x509 + sasl (encrypt, good x509 creds, good auth)
3221 *
3222 * NB1. TLS is a stackable auth scheme.
3223 * NB2. the x509 schemes have option to validate a client cert dname
3224 */
3225 if (password) {
3226 #ifdef CONFIG_VNC_TLS
3227 if (tls) {
3228 vs->auth = VNC_AUTH_VENCRYPT;
3229 if (x509) {
3230 VNC_DEBUG("Initializing VNC server with x509 password auth\n");
3231 vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
3232 } else {
3233 VNC_DEBUG("Initializing VNC server with TLS password auth\n");
3234 vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
3235 }
3236 } else {
3237 #endif /* CONFIG_VNC_TLS */
3238 VNC_DEBUG("Initializing VNC server with password auth\n");
3239 vs->auth = VNC_AUTH_VNC;
3240 #ifdef CONFIG_VNC_TLS
3241 vs->subauth = VNC_AUTH_INVALID;
3242 }
3243 #endif /* CONFIG_VNC_TLS */
3244 #ifdef CONFIG_VNC_SASL
3245 } else if (sasl) {
3246 #ifdef CONFIG_VNC_TLS
3247 if (tls) {
3248 vs->auth = VNC_AUTH_VENCRYPT;
3249 if (x509) {
3250 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
3251 vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
3252 } else {
3253 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
3254 vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
3255 }
3256 } else {
3257 #endif /* CONFIG_VNC_TLS */
3258 VNC_DEBUG("Initializing VNC server with SASL auth\n");
3259 vs->auth = VNC_AUTH_SASL;
3260 #ifdef CONFIG_VNC_TLS
3261 vs->subauth = VNC_AUTH_INVALID;
3262 }
3263 #endif /* CONFIG_VNC_TLS */
3264 #endif /* CONFIG_VNC_SASL */
3265 } else {
3266 #ifdef CONFIG_VNC_TLS
3267 if (tls) {
3268 vs->auth = VNC_AUTH_VENCRYPT;
3269 if (x509) {
3270 VNC_DEBUG("Initializing VNC server with x509 no auth\n");
3271 vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
3272 } else {
3273 VNC_DEBUG("Initializing VNC server with TLS no auth\n");
3274 vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
3275 }
3276 } else {
3277 #endif
3278 VNC_DEBUG("Initializing VNC server with no auth\n");
3279 vs->auth = VNC_AUTH_NONE;
3280 #ifdef CONFIG_VNC_TLS
3281 vs->subauth = VNC_AUTH_INVALID;
3282 }
3283 #endif
3284 }
3285
3286 #ifdef CONFIG_VNC_SASL
3287 if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
3288 error_setg(errp, "Failed to initialize SASL auth: %s",
3289 sasl_errstring(saslErr, NULL, NULL));
3290 goto fail;
3291 }
3292 #endif
3293 vs->lock_key_sync = lock_key_sync;
3294
3295 if (reverse) {
3296 /* connect to viewer */
3297 int csock;
3298 vs->lsock = -1;
3299 #ifdef CONFIG_VNC_WS
3300 vs->lwebsock = -1;
3301 #endif
3302 if (strncmp(display, "unix:", 5) == 0) {
3303 csock = unix_connect(display+5, errp);
3304 } else {
3305 csock = inet_connect(display, errp);
3306 }
3307 if (csock < 0) {
3308 goto fail;
3309 }
3310 vnc_connect(vs, csock, false, false);
3311 } else {
3312 /* listen for connects */
3313 char *dpy;
3314 dpy = g_malloc(256);
3315 if (strncmp(display, "unix:", 5) == 0) {
3316 pstrcpy(dpy, 256, "unix:");
3317 vs->lsock = unix_listen(display+5, dpy+5, 256-5, errp);
3318 } else {
3319 vs->lsock = inet_listen(display, dpy, 256,
3320 SOCK_STREAM, 5900, errp);
3321 if (vs->lsock < 0) {
3322 g_free(dpy);
3323 goto fail;
3324 }
3325 #ifdef CONFIG_VNC_WS
3326 if (vs->websocket) {
3327 if (vs->ws_display) {
3328 vs->lwebsock = inet_listen(vs->ws_display, NULL, 256,
3329 SOCK_STREAM, 0, errp);
3330 } else {
3331 vs->lwebsock = inet_listen(vs->display, NULL, 256,
3332 SOCK_STREAM, 5700, errp);
3333 }
3334
3335 if (vs->lwebsock < 0) {
3336 if (vs->lsock) {
3337 close(vs->lsock);
3338 vs->lsock = -1;
3339 }
3340 <