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S390: fix kernel_commandline handling
[qemu/qmp-unstable.git] / ui / vnc.c
blobdeb9ecd68188510eb117f14328730007054da9d4
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 "sysemu.h"
30 #include "qemu_socket.h"
31 #include "qemu-timer.h"
32 #include "acl.h"
33 #include "qemu-objects.h"
34 #include "qmp-commands.h"
35
36 #define VNC_REFRESH_INTERVAL_BASE 30
37 #define VNC_REFRESH_INTERVAL_INC 50
38 #define VNC_REFRESH_INTERVAL_MAX 2000
39 static const struct timeval VNC_REFRESH_STATS = { 0, 500000 };
40 static const struct timeval VNC_REFRESH_LOSSY = { 2, 0 };
41
42 #include "vnc_keysym.h"
43 #include "d3des.h"
44
45 static VncDisplay *vnc_display; /* needed for info vnc */
46 static DisplayChangeListener *dcl;
47
48 static int vnc_cursor_define(VncState *vs);
49 static void vnc_release_modifiers(VncState *vs);
50
51 static void vnc_set_share_mode(VncState *vs, VncShareMode mode)
52 {
53 #ifdef _VNC_DEBUG
54 static const char *mn[] = {
55 [0] = "undefined",
56 [VNC_SHARE_MODE_CONNECTING] = "connecting",
57 [VNC_SHARE_MODE_SHARED] = "shared",
58 [VNC_SHARE_MODE_EXCLUSIVE] = "exclusive",
59 [VNC_SHARE_MODE_DISCONNECTED] = "disconnected",
60 };
61 fprintf(stderr, "%s/%d: %s -> %s\n", __func__,
62 vs->csock, mn[vs->share_mode], mn[mode]);
63 #endif
64
65 if (vs->share_mode == VNC_SHARE_MODE_EXCLUSIVE) {
66 vs->vd->num_exclusive--;
67 }
68 vs->share_mode = mode;
69 if (vs->share_mode == VNC_SHARE_MODE_EXCLUSIVE) {
70 vs->vd->num_exclusive++;
71 }
72 }
73
74 static char *addr_to_string(const char *format,
75 struct sockaddr_storage *sa,
76 socklen_t salen) {
77 char *addr;
78 char host[NI_MAXHOST];
79 char serv[NI_MAXSERV];
80 int err;
81 size_t addrlen;
82
83 if ((err = getnameinfo((struct sockaddr *)sa, salen,
84 host, sizeof(host),
85 serv, sizeof(serv),
86 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
87 VNC_DEBUG("Cannot resolve address %d: %s\n",
88 err, gai_strerror(err));
89 return NULL;
90 }
91
92 /* Enough for the existing format + the 2 vars we're
93 * substituting in. */
94 addrlen = strlen(format) + strlen(host) + strlen(serv);
95 addr = g_malloc(addrlen + 1);
96 snprintf(addr, addrlen, format, host, serv);
97 addr[addrlen] = '\0';
98
99 return addr;
100 }
101
102
103 char *vnc_socket_local_addr(const char *format, int fd) {
104 struct sockaddr_storage sa;
105 socklen_t salen;
106
107 salen = sizeof(sa);
108 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0)
109 return NULL;
110
111 return addr_to_string(format, &sa, salen);
112 }
113
114 char *vnc_socket_remote_addr(const char *format, int fd) {
115 struct sockaddr_storage sa;
116 socklen_t salen;
117
118 salen = sizeof(sa);
119 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0)
120 return NULL;
121
122 return addr_to_string(format, &sa, salen);
123 }
124
125 static int put_addr_qdict(QDict *qdict, struct sockaddr_storage *sa,
126 socklen_t salen)
127 {
128 char host[NI_MAXHOST];
129 char serv[NI_MAXSERV];
130 int err;
131
132 if ((err = getnameinfo((struct sockaddr *)sa, salen,
133 host, sizeof(host),
134 serv, sizeof(serv),
135 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
136 VNC_DEBUG("Cannot resolve address %d: %s\n",
137 err, gai_strerror(err));
138 return -1;
139 }
140
141 qdict_put(qdict, "host", qstring_from_str(host));
142 qdict_put(qdict, "service", qstring_from_str(serv));
143 qdict_put(qdict, "family",qstring_from_str(inet_strfamily(sa->ss_family)));
144
145 return 0;
146 }
147
148 static int vnc_server_addr_put(QDict *qdict, int fd)
149 {
150 struct sockaddr_storage sa;
151 socklen_t salen;
152
153 salen = sizeof(sa);
154 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
155 return -1;
156 }
157
158 return put_addr_qdict(qdict, &sa, salen);
159 }
160
161 static int vnc_qdict_remote_addr(QDict *qdict, int fd)
162 {
163 struct sockaddr_storage sa;
164 socklen_t salen;
165
166 salen = sizeof(sa);
167 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
168 return -1;
169 }
170
171 return put_addr_qdict(qdict, &sa, salen);
172 }
173
174 static const char *vnc_auth_name(VncDisplay *vd) {
175 switch (vd->auth) {
176 case VNC_AUTH_INVALID:
177 return "invalid";
178 case VNC_AUTH_NONE:
179 return "none";
180 case VNC_AUTH_VNC:
181 return "vnc";
182 case VNC_AUTH_RA2:
183 return "ra2";
184 case VNC_AUTH_RA2NE:
185 return "ra2ne";
186 case VNC_AUTH_TIGHT:
187 return "tight";
188 case VNC_AUTH_ULTRA:
189 return "ultra";
190 case VNC_AUTH_TLS:
191 return "tls";
192 case VNC_AUTH_VENCRYPT:
193 #ifdef CONFIG_VNC_TLS
194 switch (vd->subauth) {
195 case VNC_AUTH_VENCRYPT_PLAIN:
196 return "vencrypt+plain";
197 case VNC_AUTH_VENCRYPT_TLSNONE:
198 return "vencrypt+tls+none";
199 case VNC_AUTH_VENCRYPT_TLSVNC:
200 return "vencrypt+tls+vnc";
201 case VNC_AUTH_VENCRYPT_TLSPLAIN:
202 return "vencrypt+tls+plain";
203 case VNC_AUTH_VENCRYPT_X509NONE:
204 return "vencrypt+x509+none";
205 case VNC_AUTH_VENCRYPT_X509VNC:
206 return "vencrypt+x509+vnc";
207 case VNC_AUTH_VENCRYPT_X509PLAIN:
208 return "vencrypt+x509+plain";
209 case VNC_AUTH_VENCRYPT_TLSSASL:
210 return "vencrypt+tls+sasl";
211 case VNC_AUTH_VENCRYPT_X509SASL:
212 return "vencrypt+x509+sasl";
213 default:
214 return "vencrypt";
215 }
216 #else
217 return "vencrypt";
218 #endif
219 case VNC_AUTH_SASL:
220 return "sasl";
221 }
222 return "unknown";
223 }
224
225 static int vnc_server_info_put(QDict *qdict)
226 {
227 if (vnc_server_addr_put(qdict, vnc_display->lsock) < 0) {
228 return -1;
229 }
230
231 qdict_put(qdict, "auth", qstring_from_str(vnc_auth_name(vnc_display)));
232 return 0;
233 }
234
235 static void vnc_client_cache_auth(VncState *client)
236 {
237 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
238 QDict *qdict;
239 #endif
240
241 if (!client->info) {
242 return;
243 }
244
245 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
246 qdict = qobject_to_qdict(client->info);
247 #endif
248
249 #ifdef CONFIG_VNC_TLS
250 if (client->tls.session &&
251 client->tls.dname) {
252 qdict_put(qdict, "x509_dname", qstring_from_str(client->tls.dname));
253 }
254 #endif
255 #ifdef CONFIG_VNC_SASL
256 if (client->sasl.conn &&
257 client->sasl.username) {
258 qdict_put(qdict, "sasl_username",
259 qstring_from_str(client->sasl.username));
260 }
261 #endif
262 }
263
264 static void vnc_client_cache_addr(VncState *client)
265 {
266 QDict *qdict;
267
268 qdict = qdict_new();
269 if (vnc_qdict_remote_addr(qdict, client->csock) < 0) {
270 QDECREF(qdict);
271 /* XXX: how to report the error? */
272 return;
273 }
274
275 client->info = QOBJECT(qdict);
276 }
277
278 static void vnc_qmp_event(VncState *vs, MonitorEvent event)
279 {
280 QDict *server;
281 QObject *data;
282
283 if (!vs->info) {
284 return;
285 }
286
287 server = qdict_new();
288 if (vnc_server_info_put(server) < 0) {
289 QDECREF(server);
290 return;
291 }
292
293 data = qobject_from_jsonf("{ 'client': %p, 'server': %p }",
294 vs->info, QOBJECT(server));
295
296 monitor_protocol_event(event, data);
297
298 qobject_incref(vs->info);
299 qobject_decref(data);
300 }
301
302 static VncClientInfo *qmp_query_vnc_client(const VncState *client)
303 {
304 struct sockaddr_storage sa;
305 socklen_t salen = sizeof(sa);
306 char host[NI_MAXHOST];
307 char serv[NI_MAXSERV];
308 VncClientInfo *info;
309
310 if (getpeername(client->csock, (struct sockaddr *)&sa, &salen) < 0) {
311 return NULL;
312 }
313
314 if (getnameinfo((struct sockaddr *)&sa, salen,
315 host, sizeof(host),
316 serv, sizeof(serv),
317 NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
318 return NULL;
319 }
320
321 info = g_malloc0(sizeof(*info));
322 info->host = g_strdup(host);
323 info->service = g_strdup(serv);
324 info->family = g_strdup(inet_strfamily(sa.ss_family));
325
326 #ifdef CONFIG_VNC_TLS
327 if (client->tls.session && client->tls.dname) {
328 info->has_x509_dname = true;
329 info->x509_dname = g_strdup(client->tls.dname);
330 }
331 #endif
332 #ifdef CONFIG_VNC_SASL
333 if (client->sasl.conn && client->sasl.username) {
334 info->has_sasl_username = true;
335 info->sasl_username = g_strdup(client->sasl.username);
336 }
337 #endif
338
339 return info;
340 }
341
342 VncInfo *qmp_query_vnc(Error **errp)
343 {
344 VncInfo *info = g_malloc0(sizeof(*info));
345
346 if (vnc_display == NULL || vnc_display->display == NULL) {
347 info->enabled = false;
348 } else {
349 VncClientInfoList *cur_item = NULL;
350 struct sockaddr_storage sa;
351 socklen_t salen = sizeof(sa);
352 char host[NI_MAXHOST];
353 char serv[NI_MAXSERV];
354 VncState *client;
355
356 info->enabled = true;
357
358 /* for compatibility with the original command */
359 info->has_clients = true;
360
361 QTAILQ_FOREACH(client, &vnc_display->clients, next) {
362 VncClientInfoList *cinfo = g_malloc0(sizeof(*info));
363 cinfo->value = qmp_query_vnc_client(client);
364
365 /* XXX: waiting for the qapi to support GSList */
366 if (!cur_item) {
367 info->clients = cur_item = cinfo;
368 } else {
369 cur_item->next = cinfo;
370 cur_item = cinfo;
371 }
372 }
373
374 if (getsockname(vnc_display->lsock, (struct sockaddr *)&sa,
375 &salen) == -1) {
376 error_set(errp, QERR_UNDEFINED_ERROR);
377 goto out_error;
378 }
379
380 if (getnameinfo((struct sockaddr *)&sa, salen,
381 host, sizeof(host),
382 serv, sizeof(serv),
383 NI_NUMERICHOST | NI_NUMERICSERV) < 0) {
384 error_set(errp, QERR_UNDEFINED_ERROR);
385 goto out_error;
386 }
387
388 info->has_host = true;
389 info->host = g_strdup(host);
390
391 info->has_service = true;
392 info->service = g_strdup(serv);
393
394 info->has_family = true;
395 info->family = g_strdup(inet_strfamily(sa.ss_family));
396
397 info->has_auth = true;
398 info->auth = g_strdup(vnc_auth_name(vnc_display));
399 }
400
401 return info;
402
403 out_error:
404 qapi_free_VncInfo(info);
405 return NULL;
406 }
407
408 /* TODO
409 1) Get the queue working for IO.
410 2) there is some weirdness when using the -S option (the screen is grey
411 and not totally invalidated
412 3) resolutions > 1024
413 */
414
415 static int vnc_update_client(VncState *vs, int has_dirty);
416 static int vnc_update_client_sync(VncState *vs, int has_dirty);
417 static void vnc_disconnect_start(VncState *vs);
418 static void vnc_disconnect_finish(VncState *vs);
419 static void vnc_init_timer(VncDisplay *vd);
420 static void vnc_remove_timer(VncDisplay *vd);
421
422 static void vnc_colordepth(VncState *vs);
423 static void framebuffer_update_request(VncState *vs, int incremental,
424 int x_position, int y_position,
425 int w, int h);
426 static void vnc_refresh(void *opaque);
427 static int vnc_refresh_server_surface(VncDisplay *vd);
428
429 static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h)
430 {
431 int i;
432 VncDisplay *vd = ds->opaque;
433 struct VncSurface *s = &vd->guest;
434
435 h += y;
436
437 /* round x down to ensure the loop only spans one 16-pixel block per,
438 iteration. otherwise, if (x % 16) != 0, the last iteration may span
439 two 16-pixel blocks but we only mark the first as dirty
440 */
441 w += (x % 16);
442 x -= (x % 16);
443
444 x = MIN(x, s->ds->width);
445 y = MIN(y, s->ds->height);
446 w = MIN(x + w, s->ds->width) - x;
447 h = MIN(h, s->ds->height);
448
449 for (; y < h; y++)
450 for (i = 0; i < w; i += 16)
451 set_bit((x + i) / 16, s->dirty[y]);
452 }
453
454 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
455 int32_t encoding)
456 {
457 vnc_write_u16(vs, x);
458 vnc_write_u16(vs, y);
459 vnc_write_u16(vs, w);
460 vnc_write_u16(vs, h);
461
462 vnc_write_s32(vs, encoding);
463 }
464
465 void buffer_reserve(Buffer *buffer, size_t len)
466 {
467 if ((buffer->capacity - buffer->offset) < len) {
468 buffer->capacity += (len + 1024);
469 buffer->buffer = g_realloc(buffer->buffer, buffer->capacity);
470 if (buffer->buffer == NULL) {
471 fprintf(stderr, "vnc: out of memory\n");
472 exit(1);
473 }
474 }
475 }
476
477 int buffer_empty(Buffer *buffer)
478 {
479 return buffer->offset == 0;
480 }
481
482 uint8_t *buffer_end(Buffer *buffer)
483 {
484 return buffer->buffer + buffer->offset;
485 }
486
487 void buffer_reset(Buffer *buffer)
488 {
489 buffer->offset = 0;
490 }
491
492 void buffer_free(Buffer *buffer)
493 {
494 g_free(buffer->buffer);
495 buffer->offset = 0;
496 buffer->capacity = 0;
497 buffer->buffer = NULL;
498 }
499
500 void buffer_append(Buffer *buffer, const void *data, size_t len)
501 {
502 memcpy(buffer->buffer + buffer->offset, data, len);
503 buffer->offset += len;
504 }
505
506 static void vnc_desktop_resize(VncState *vs)
507 {
508 DisplayState *ds = vs->ds;
509
510 if (vs->csock == -1 || !vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
511 return;
512 }
513 if (vs->client_width == ds_get_width(ds) &&
514 vs->client_height == ds_get_height(ds)) {
515 return;
516 }
517 vs->client_width = ds_get_width(ds);
518 vs->client_height = ds_get_height(ds);
519 vnc_lock_output(vs);
520 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
521 vnc_write_u8(vs, 0);
522 vnc_write_u16(vs, 1); /* number of rects */
523 vnc_framebuffer_update(vs, 0, 0, vs->client_width, vs->client_height,
524 VNC_ENCODING_DESKTOPRESIZE);
525 vnc_unlock_output(vs);
526 vnc_flush(vs);
527 }
528
529 #ifdef CONFIG_VNC_THREAD
530 static void vnc_abort_display_jobs(VncDisplay *vd)
531 {
532 VncState *vs;
533
534 QTAILQ_FOREACH(vs, &vd->clients, next) {
535 vnc_lock_output(vs);
536 vs->abort = true;
537 vnc_unlock_output(vs);
538 }
539 QTAILQ_FOREACH(vs, &vd->clients, next) {
540 vnc_jobs_join(vs);
541 }
542 QTAILQ_FOREACH(vs, &vd->clients, next) {
543 vnc_lock_output(vs);
544 vs->abort = false;
545 vnc_unlock_output(vs);
546 }
547 }
548 #else
549 static void vnc_abort_display_jobs(VncDisplay *vd)
550 {
551 }
552 #endif
553
554 static void vnc_dpy_resize(DisplayState *ds)
555 {
556 VncDisplay *vd = ds->opaque;
557 VncState *vs;
558
559 vnc_abort_display_jobs(vd);
560
561 /* server surface */
562 if (!vd->server)
563 vd->server = g_malloc0(sizeof(*vd->server));
564 if (vd->server->data)
565 g_free(vd->server->data);
566 *(vd->server) = *(ds->surface);
567 vd->server->data = g_malloc0(vd->server->linesize *
568 vd->server->height);
569
570 /* guest surface */
571 if (!vd->guest.ds)
572 vd->guest.ds = g_malloc0(sizeof(*vd->guest.ds));
573 if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel)
574 console_color_init(ds);
575 *(vd->guest.ds) = *(ds->surface);
576 memset(vd->guest.dirty, 0xFF, sizeof(vd->guest.dirty));
577
578 QTAILQ_FOREACH(vs, &vd->clients, next) {
579 vnc_colordepth(vs);
580 vnc_desktop_resize(vs);
581 if (vs->vd->cursor) {
582 vnc_cursor_define(vs);
583 }
584 memset(vs->dirty, 0xFF, sizeof(vs->dirty));
585 }
586 }
587
588 /* fastest code */
589 static void vnc_write_pixels_copy(VncState *vs, struct PixelFormat *pf,
590 void *pixels, int size)
591 {
592 vnc_write(vs, pixels, size);
593 }
594
595 /* slowest but generic code. */
596 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
597 {
598 uint8_t r, g, b;
599 VncDisplay *vd = vs->vd;
600
601 r = ((((v & vd->server->pf.rmask) >> vd->server->pf.rshift) << vs->clientds.pf.rbits) >>
602 vd->server->pf.rbits);
603 g = ((((v & vd->server->pf.gmask) >> vd->server->pf.gshift) << vs->clientds.pf.gbits) >>
604 vd->server->pf.gbits);
605 b = ((((v & vd->server->pf.bmask) >> vd->server->pf.bshift) << vs->clientds.pf.bbits) >>
606 vd->server->pf.bbits);
607 v = (r << vs->clientds.pf.rshift) |
608 (g << vs->clientds.pf.gshift) |
609 (b << vs->clientds.pf.bshift);
610 switch(vs->clientds.pf.bytes_per_pixel) {
611 case 1:
612 buf[0] = v;
613 break;
614 case 2:
615 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
616 buf[0] = v >> 8;
617 buf[1] = v;
618 } else {
619 buf[1] = v >> 8;
620 buf[0] = v;
621 }
622 break;
623 default:
624 case 4:
625 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
626 buf[0] = v >> 24;
627 buf[1] = v >> 16;
628 buf[2] = v >> 8;
629 buf[3] = v;
630 } else {
631 buf[3] = v >> 24;
632 buf[2] = v >> 16;
633 buf[1] = v >> 8;
634 buf[0] = v;
635 }
636 break;
637 }
638 }
639
640 static void vnc_write_pixels_generic(VncState *vs, struct PixelFormat *pf,
641 void *pixels1, int size)
642 {
643 uint8_t buf[4];
644
645 if (pf->bytes_per_pixel == 4) {
646 uint32_t *pixels = pixels1;
647 int n, i;
648 n = size >> 2;
649 for(i = 0; i < n; i++) {
650 vnc_convert_pixel(vs, buf, pixels[i]);
651 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
652 }
653 } else if (pf->bytes_per_pixel == 2) {
654 uint16_t *pixels = pixels1;
655 int n, i;
656 n = size >> 1;
657 for(i = 0; i < n; i++) {
658 vnc_convert_pixel(vs, buf, pixels[i]);
659 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
660 }
661 } else if (pf->bytes_per_pixel == 1) {
662 uint8_t *pixels = pixels1;
663 int n, i;
664 n = size;
665 for(i = 0; i < n; i++) {
666 vnc_convert_pixel(vs, buf, pixels[i]);
667 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
668 }
669 } else {
670 fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
671 }
672 }
673
674 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
675 {
676 int i;
677 uint8_t *row;
678 VncDisplay *vd = vs->vd;
679
680 row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
681 for (i = 0; i < h; i++) {
682 vs->write_pixels(vs, &vd->server->pf, row, w * ds_get_bytes_per_pixel(vs->ds));
683 row += ds_get_linesize(vs->ds);
684 }
685 return 1;
686 }
687
688 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
689 {
690 int n = 0;
691
692 switch(vs->vnc_encoding) {
693 case VNC_ENCODING_ZLIB:
694 n = vnc_zlib_send_framebuffer_update(vs, x, y, w, h);
695 break;
696 case VNC_ENCODING_HEXTILE:
697 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE);
698 n = vnc_hextile_send_framebuffer_update(vs, x, y, w, h);
699 break;
700 case VNC_ENCODING_TIGHT:
701 n = vnc_tight_send_framebuffer_update(vs, x, y, w, h);
702 break;
703 case VNC_ENCODING_TIGHT_PNG:
704 n = vnc_tight_png_send_framebuffer_update(vs, x, y, w, h);
705 break;
706 case VNC_ENCODING_ZRLE:
707 n = vnc_zrle_send_framebuffer_update(vs, x, y, w, h);
708 break;
709 case VNC_ENCODING_ZYWRLE:
710 n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h);
711 break;
712 default:
713 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW);
714 n = vnc_raw_send_framebuffer_update(vs, x, y, w, h);
715 break;
716 }
717 return n;
718 }
719
720 static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
721 {
722 /* send bitblit op to the vnc client */
723 vnc_lock_output(vs);
724 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
725 vnc_write_u8(vs, 0);
726 vnc_write_u16(vs, 1); /* number of rects */
727 vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT);
728 vnc_write_u16(vs, src_x);
729 vnc_write_u16(vs, src_y);
730 vnc_unlock_output(vs);
731 vnc_flush(vs);
732 }
733
734 static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
735 {
736 VncDisplay *vd = ds->opaque;
737 VncState *vs, *vn;
738 uint8_t *src_row;
739 uint8_t *dst_row;
740 int i,x,y,pitch,depth,inc,w_lim,s;
741 int cmp_bytes;
742
743 vnc_refresh_server_surface(vd);
744 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
745 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
746 vs->force_update = 1;
747 vnc_update_client_sync(vs, 1);
748 /* vs might be free()ed here */
749 }
750 }
751
752 /* do bitblit op on the local surface too */
753 pitch = ds_get_linesize(vd->ds);
754 depth = ds_get_bytes_per_pixel(vd->ds);
755 src_row = vd->server->data + pitch * src_y + depth * src_x;
756 dst_row = vd->server->data + pitch * dst_y + depth * dst_x;
757 y = dst_y;
758 inc = 1;
759 if (dst_y > src_y) {
760 /* copy backwards */
761 src_row += pitch * (h-1);
762 dst_row += pitch * (h-1);
763 pitch = -pitch;
764 y = dst_y + h - 1;
765 inc = -1;
766 }
767 w_lim = w - (16 - (dst_x % 16));
768 if (w_lim < 0)
769 w_lim = w;
770 else
771 w_lim = w - (w_lim % 16);
772 for (i = 0; i < h; i++) {
773 for (x = 0; x <= w_lim;
774 x += s, src_row += cmp_bytes, dst_row += cmp_bytes) {
775 if (x == w_lim) {
776 if ((s = w - w_lim) == 0)
777 break;
778 } else if (!x) {
779 s = (16 - (dst_x % 16));
780 s = MIN(s, w_lim);
781 } else {
782 s = 16;
783 }
784 cmp_bytes = s * depth;
785 if (memcmp(src_row, dst_row, cmp_bytes) == 0)
786 continue;
787 memmove(dst_row, src_row, cmp_bytes);
788 QTAILQ_FOREACH(vs, &vd->clients, next) {
789 if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
790 set_bit(((x + dst_x) / 16), vs->dirty[y]);
791 }
792 }
793 }
794 src_row += pitch - w * depth;
795 dst_row += pitch - w * depth;
796 y += inc;
797 }
798
799 QTAILQ_FOREACH(vs, &vd->clients, next) {
800 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
801 vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h);
802 }
803 }
804 }
805
806 static void vnc_mouse_set(int x, int y, int visible)
807 {
808 /* can we ask the client(s) to move the pointer ??? */
809 }
810
811 static int vnc_cursor_define(VncState *vs)
812 {
813 QEMUCursor *c = vs->vd->cursor;
814 PixelFormat pf = qemu_default_pixelformat(32);
815 int isize;
816
817 if (vnc_has_feature(vs, VNC_FEATURE_RICH_CURSOR)) {
818 vnc_lock_output(vs);
819 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
820 vnc_write_u8(vs, 0); /* padding */
821 vnc_write_u16(vs, 1); /* # of rects */
822 vnc_framebuffer_update(vs, c->hot_x, c->hot_y, c->width, c->height,
823 VNC_ENCODING_RICH_CURSOR);
824 isize = c->width * c->height * vs->clientds.pf.bytes_per_pixel;
825 vnc_write_pixels_generic(vs, &pf, c->data, isize);
826 vnc_write(vs, vs->vd->cursor_mask, vs->vd->cursor_msize);
827 vnc_unlock_output(vs);
828 return 0;
829 }
830 return -1;
831 }
832
833 static void vnc_dpy_cursor_define(QEMUCursor *c)
834 {
835 VncDisplay *vd = vnc_display;
836 VncState *vs;
837
838 cursor_put(vd->cursor);
839 g_free(vd->cursor_mask);
840
841 vd->cursor = c;
842 cursor_get(vd->cursor);
843 vd->cursor_msize = cursor_get_mono_bpl(c) * c->height;
844 vd->cursor_mask = g_malloc0(vd->cursor_msize);
845 cursor_get_mono_mask(c, 0, vd->cursor_mask);
846
847 QTAILQ_FOREACH(vs, &vd->clients, next) {
848 vnc_cursor_define(vs);
849 }
850 }
851
852 static int find_and_clear_dirty_height(struct VncState *vs,
853 int y, int last_x, int x, int height)
854 {
855 int h;
856
857 for (h = 1; h < (height - y); h++) {
858 int tmp_x;
859 if (!test_bit(last_x, vs->dirty[y + h])) {
860 break;
861 }
862 for (tmp_x = last_x; tmp_x < x; tmp_x++) {
863 clear_bit(tmp_x, vs->dirty[y + h]);
864 }
865 }
866
867 return h;
868 }
869
870 #ifdef CONFIG_VNC_THREAD
871 static int vnc_update_client_sync(VncState *vs, int has_dirty)
872 {
873 int ret = vnc_update_client(vs, has_dirty);
874 vnc_jobs_join(vs);
875 return ret;
876 }
877 #else
878 static int vnc_update_client_sync(VncState *vs, int has_dirty)
879 {
880 return vnc_update_client(vs, has_dirty);
881 }
882 #endif
883
884 static int vnc_update_client(VncState *vs, int has_dirty)
885 {
886 if (vs->need_update && vs->csock != -1) {
887 VncDisplay *vd = vs->vd;
888 VncJob *job;
889 int y;
890 int width, height;
891 int n = 0;
892
893
894 if (vs->output.offset && !vs->audio_cap && !vs->force_update)
895 /* kernel send buffers are full -> drop frames to throttle */
896 return 0;
897
898 if (!has_dirty && !vs->audio_cap && !vs->force_update)
899 return 0;
900
901 /*
902 * Send screen updates to the vnc client using the server
903 * surface and server dirty map. guest surface updates
904 * happening in parallel don't disturb us, the next pass will
905 * send them to the client.
906 */
907 job = vnc_job_new(vs);
908
909 width = MIN(vd->server->width, vs->client_width);
910 height = MIN(vd->server->height, vs->client_height);
911
912 for (y = 0; y < height; y++) {
913 int x;
914 int last_x = -1;
915 for (x = 0; x < width / 16; x++) {
916 if (test_and_clear_bit(x, vs->dirty[y])) {
917 if (last_x == -1) {
918 last_x = x;
919 }
920 } else {
921 if (last_x != -1) {
922 int h = find_and_clear_dirty_height(vs, y, last_x, x,
923 height);
924
925 n += vnc_job_add_rect(job, last_x * 16, y,
926 (x - last_x) * 16, h);
927 }
928 last_x = -1;
929 }
930 }
931 if (last_x != -1) {
932 int h = find_and_clear_dirty_height(vs, y, last_x, x, height);
933 n += vnc_job_add_rect(job, last_x * 16, y,
934 (x - last_x) * 16, h);
935 }
936 }
937
938 vnc_job_push(job);
939 vs->force_update = 0;
940 return n;
941 }
942
943 if (vs->csock == -1)
944 vnc_disconnect_finish(vs);
945
946 return 0;
947 }
948
949 /* audio */
950 static void audio_capture_notify(void *opaque, audcnotification_e cmd)
951 {
952 VncState *vs = opaque;
953
954 switch (cmd) {
955 case AUD_CNOTIFY_DISABLE:
956 vnc_lock_output(vs);
957 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
958 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
959 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END);
960 vnc_unlock_output(vs);
961 vnc_flush(vs);
962 break;
963
964 case AUD_CNOTIFY_ENABLE:
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_BEGIN);
969 vnc_unlock_output(vs);
970 vnc_flush(vs);
971 break;
972 }
973 }
974
975 static void audio_capture_destroy(void *opaque)
976 {
977 }
978
979 static void audio_capture(void *opaque, void *buf, int size)
980 {
981 VncState *vs = opaque;
982
983 vnc_lock_output(vs);
984 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
985 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
986 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA);
987 vnc_write_u32(vs, size);
988 vnc_write(vs, buf, size);
989 vnc_unlock_output(vs);
990 vnc_flush(vs);
991 }
992
993 static void audio_add(VncState *vs)
994 {
995 struct audio_capture_ops ops;
996
997 if (vs->audio_cap) {
998 monitor_printf(default_mon, "audio already running\n");
999 return;
1000 }
1001
1002 ops.notify = audio_capture_notify;
1003 ops.destroy = audio_capture_destroy;
1004 ops.capture = audio_capture;
1005
1006 vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs);
1007 if (!vs->audio_cap) {
1008 monitor_printf(default_mon, "Failed to add audio capture\n");
1009 }
1010 }
1011
1012 static void audio_del(VncState *vs)
1013 {
1014 if (vs->audio_cap) {
1015 AUD_del_capture(vs->audio_cap, vs);
1016 vs->audio_cap = NULL;
1017 }
1018 }
1019
1020 static void vnc_disconnect_start(VncState *vs)
1021 {
1022 if (vs->csock == -1)
1023 return;
1024 vnc_set_share_mode(vs, VNC_SHARE_MODE_DISCONNECTED);
1025 qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
1026 closesocket(vs->csock);
1027 vs->csock = -1;
1028 }
1029
1030 static void vnc_disconnect_finish(VncState *vs)
1031 {
1032 int i;
1033
1034 vnc_jobs_join(vs); /* Wait encoding jobs */
1035
1036 vnc_lock_output(vs);
1037 vnc_qmp_event(vs, QEVENT_VNC_DISCONNECTED);
1038
1039 buffer_free(&vs->input);
1040 buffer_free(&vs->output);
1041
1042 qobject_decref(vs->info);
1043
1044 vnc_zlib_clear(vs);
1045 vnc_tight_clear(vs);
1046 vnc_zrle_clear(vs);
1047
1048 #ifdef CONFIG_VNC_TLS
1049 vnc_tls_client_cleanup(vs);
1050 #endif /* CONFIG_VNC_TLS */
1051 #ifdef CONFIG_VNC_SASL
1052 vnc_sasl_client_cleanup(vs);
1053 #endif /* CONFIG_VNC_SASL */
1054 audio_del(vs);
1055 vnc_release_modifiers(vs);
1056
1057 QTAILQ_REMOVE(&vs->vd->clients, vs, next);
1058
1059 if (QTAILQ_EMPTY(&vs->vd->clients)) {
1060 dcl->idle = 1;
1061 }
1062
1063 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
1064 vnc_remove_timer(vs->vd);
1065 if (vs->vd->lock_key_sync)
1066 qemu_remove_led_event_handler(vs->led);
1067 vnc_unlock_output(vs);
1068
1069 #ifdef CONFIG_VNC_THREAD
1070 qemu_mutex_destroy(&vs->output_mutex);
1071 qemu_bh_delete(vs->bh);
1072 buffer_free(&vs->jobs_buffer);
1073 #endif
1074
1075 for (i = 0; i < VNC_STAT_ROWS; ++i) {
1076 g_free(vs->lossy_rect[i]);
1077 }
1078 g_free(vs->lossy_rect);
1079 g_free(vs);
1080 }
1081
1082 int vnc_client_io_error(VncState *vs, int ret, int last_errno)
1083 {
1084 if (ret == 0 || ret == -1) {
1085 if (ret == -1) {
1086 switch (last_errno) {
1087 case EINTR:
1088 case EAGAIN:
1089 #ifdef _WIN32
1090 case WSAEWOULDBLOCK:
1091 #endif
1092 return 0;
1093 default:
1094 break;
1095 }
1096 }
1097
1098 VNC_DEBUG("Closing down client sock: ret %d, errno %d\n",
1099 ret, ret < 0 ? last_errno : 0);
1100 vnc_disconnect_start(vs);
1101
1102 return 0;
1103 }
1104 return ret;
1105 }
1106
1107
1108 void vnc_client_error(VncState *vs)
1109 {
1110 VNC_DEBUG("Closing down client sock: protocol error\n");
1111 vnc_disconnect_start(vs);
1112 }
1113
1114
1115 /*
1116 * Called to write a chunk of data to the client socket. The data may
1117 * be the raw data, or may have already been encoded by SASL.
1118 * The data will be written either straight onto the socket, or
1119 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1120 *
1121 * NB, it is theoretically possible to have 2 layers of encryption,
1122 * both SASL, and this TLS layer. It is highly unlikely in practice
1123 * though, since SASL encryption will typically be a no-op if TLS
1124 * is active
1125 *
1126 * Returns the number of bytes written, which may be less than
1127 * the requested 'datalen' if the socket would block. Returns
1128 * -1 on error, and disconnects the client socket.
1129 */
1130 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
1131 {
1132 long ret;
1133 #ifdef CONFIG_VNC_TLS
1134 if (vs->tls.session) {
1135 ret = gnutls_write(vs->tls.session, data, datalen);
1136 if (ret < 0) {
1137 if (ret == GNUTLS_E_AGAIN)
1138 errno = EAGAIN;
1139 else
1140 errno = EIO;
1141 ret = -1;
1142 }
1143 } else
1144 #endif /* CONFIG_VNC_TLS */
1145 ret = send(vs->csock, (const void *)data, datalen, 0);
1146 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
1147 return vnc_client_io_error(vs, ret, socket_error());
1148 }
1149
1150
1151 /*
1152 * Called to write buffered data to the client socket, when not
1153 * using any SASL SSF encryption layers. Will write as much data
1154 * as possible without blocking. If all buffered data is written,
1155 * will switch the FD poll() handler back to read monitoring.
1156 *
1157 * Returns the number of bytes written, which may be less than
1158 * the buffered output data if the socket would block. Returns
1159 * -1 on error, and disconnects the client socket.
1160 */
1161 static long vnc_client_write_plain(VncState *vs)
1162 {
1163 long ret;
1164
1165 #ifdef CONFIG_VNC_SASL
1166 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n",
1167 vs->output.buffer, vs->output.capacity, vs->output.offset,
1168 vs->sasl.waitWriteSSF);
1169
1170 if (vs->sasl.conn &&
1171 vs->sasl.runSSF &&
1172 vs->sasl.waitWriteSSF) {
1173 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF);
1174 if (ret)
1175 vs->sasl.waitWriteSSF -= ret;
1176 } else
1177 #endif /* CONFIG_VNC_SASL */
1178 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset);
1179 if (!ret)
1180 return 0;
1181
1182 memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret));
1183 vs->output.offset -= ret;
1184
1185 if (vs->output.offset == 0) {
1186 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1187 }
1188
1189 return ret;
1190 }
1191
1192
1193 /*
1194 * First function called whenever there is data to be written to
1195 * the client socket. Will delegate actual work according to whether
1196 * SASL SSF layers are enabled (thus requiring encryption calls)
1197 */
1198 static void vnc_client_write_locked(void *opaque)
1199 {
1200 VncState *vs = opaque;
1201
1202 #ifdef CONFIG_VNC_SASL
1203 if (vs->sasl.conn &&
1204 vs->sasl.runSSF &&
1205 !vs->sasl.waitWriteSSF) {
1206 vnc_client_write_sasl(vs);
1207 } else
1208 #endif /* CONFIG_VNC_SASL */
1209 vnc_client_write_plain(vs);
1210 }
1211
1212 void vnc_client_write(void *opaque)
1213 {
1214 VncState *vs = opaque;
1215
1216 vnc_lock_output(vs);
1217 if (vs->output.offset) {
1218 vnc_client_write_locked(opaque);
1219 } else if (vs->csock != -1) {
1220 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1221 }
1222 vnc_unlock_output(vs);
1223 }
1224
1225 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
1226 {
1227 vs->read_handler = func;
1228 vs->read_handler_expect = expecting;
1229 }
1230
1231
1232 /*
1233 * Called to read a chunk of data from the client socket. The data may
1234 * be the raw data, or may need to be further decoded by SASL.
1235 * The data will be read either straight from to the socket, or
1236 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1237 *
1238 * NB, it is theoretically possible to have 2 layers of encryption,
1239 * both SASL, and this TLS layer. It is highly unlikely in practice
1240 * though, since SASL encryption will typically be a no-op if TLS
1241 * is active
1242 *
1243 * Returns the number of bytes read, which may be less than
1244 * the requested 'datalen' if the socket would block. Returns
1245 * -1 on error, and disconnects the client socket.
1246 */
1247 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
1248 {
1249 long ret;
1250 #ifdef CONFIG_VNC_TLS
1251 if (vs->tls.session) {
1252 ret = gnutls_read(vs->tls.session, data, datalen);
1253 if (ret < 0) {
1254 if (ret == GNUTLS_E_AGAIN)
1255 errno = EAGAIN;
1256 else
1257 errno = EIO;
1258 ret = -1;
1259 }
1260 } else
1261 #endif /* CONFIG_VNC_TLS */
1262 ret = qemu_recv(vs->csock, data, datalen, 0);
1263 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
1264 return vnc_client_io_error(vs, ret, socket_error());
1265 }
1266
1267
1268 /*
1269 * Called to read data from the client socket to the input buffer,
1270 * when not using any SASL SSF encryption layers. Will read as much
1271 * data as possible without blocking.
1272 *
1273 * Returns the number of bytes read. Returns -1 on error, and
1274 * disconnects the client socket.
1275 */
1276 static long vnc_client_read_plain(VncState *vs)
1277 {
1278 int ret;
1279 VNC_DEBUG("Read plain %p size %zd offset %zd\n",
1280 vs->input.buffer, vs->input.capacity, vs->input.offset);
1281 buffer_reserve(&vs->input, 4096);
1282 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096);
1283 if (!ret)
1284 return 0;
1285 vs->input.offset += ret;
1286 return ret;
1287 }
1288
1289 #ifdef CONFIG_VNC_THREAD
1290 static void vnc_jobs_bh(void *opaque)
1291 {
1292 VncState *vs = opaque;
1293
1294 vnc_jobs_consume_buffer(vs);
1295 }
1296 #endif
1297
1298 /*
1299 * First function called whenever there is more data to be read from
1300 * the client socket. Will delegate actual work according to whether
1301 * SASL SSF layers are enabled (thus requiring decryption calls)
1302 */
1303 void vnc_client_read(void *opaque)
1304 {
1305 VncState *vs = opaque;
1306 long ret;
1307
1308 #ifdef CONFIG_VNC_SASL
1309 if (vs->sasl.conn && vs->sasl.runSSF)
1310 ret = vnc_client_read_sasl(vs);
1311 else
1312 #endif /* CONFIG_VNC_SASL */
1313 ret = vnc_client_read_plain(vs);
1314 if (!ret) {
1315 if (vs->csock == -1)
1316 vnc_disconnect_finish(vs);
1317 return;
1318 }
1319
1320 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
1321 size_t len = vs->read_handler_expect;
1322 int ret;
1323
1324 ret = vs->read_handler(vs, vs->input.buffer, len);
1325 if (vs->csock == -1) {
1326 vnc_disconnect_finish(vs);
1327 return;
1328 }
1329
1330 if (!ret) {
1331 memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len));
1332 vs->input.offset -= len;
1333 } else {
1334 vs->read_handler_expect = ret;
1335 }
1336 }
1337 }
1338
1339 void vnc_write(VncState *vs, const void *data, size_t len)
1340 {
1341 buffer_reserve(&vs->output, len);
1342
1343 if (vs->csock != -1 && buffer_empty(&vs->output)) {
1344 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
1345 }
1346
1347 buffer_append(&vs->output, data, len);
1348 }
1349
1350 void vnc_write_s32(VncState *vs, int32_t value)
1351 {
1352 vnc_write_u32(vs, *(uint32_t *)&value);
1353 }
1354
1355 void vnc_write_u32(VncState *vs, uint32_t value)
1356 {
1357 uint8_t buf[4];
1358
1359 buf[0] = (value >> 24) & 0xFF;
1360 buf[1] = (value >> 16) & 0xFF;
1361 buf[2] = (value >> 8) & 0xFF;
1362 buf[3] = value & 0xFF;
1363
1364 vnc_write(vs, buf, 4);
1365 }
1366
1367 void vnc_write_u16(VncState *vs, uint16_t value)
1368 {
1369 uint8_t buf[2];
1370
1371 buf[0] = (value >> 8) & 0xFF;
1372 buf[1] = value & 0xFF;
1373
1374 vnc_write(vs, buf, 2);
1375 }
1376
1377 void vnc_write_u8(VncState *vs, uint8_t value)
1378 {
1379 vnc_write(vs, (char *)&value, 1);
1380 }
1381
1382 void vnc_flush(VncState *vs)
1383 {
1384 vnc_lock_output(vs);
1385 if (vs->csock != -1 && vs->output.offset) {
1386 vnc_client_write_locked(vs);
1387 }
1388 vnc_unlock_output(vs);
1389 }
1390
1391 uint8_t read_u8(uint8_t *data, size_t offset)
1392 {
1393 return data[offset];
1394 }
1395
1396 uint16_t read_u16(uint8_t *data, size_t offset)
1397 {
1398 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
1399 }
1400
1401 int32_t read_s32(uint8_t *data, size_t offset)
1402 {
1403 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
1404 (data[offset + 2] << 8) | data[offset + 3]);
1405 }
1406
1407 uint32_t read_u32(uint8_t *data, size_t offset)
1408 {
1409 return ((data[offset] << 24) | (data[offset + 1] << 16) |
1410 (data[offset + 2] << 8) | data[offset + 3]);
1411 }
1412
1413 static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
1414 {
1415 }
1416
1417 static void check_pointer_type_change(Notifier *notifier, void *data)
1418 {
1419 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier);
1420 int absolute = kbd_mouse_is_absolute();
1421
1422 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) {
1423 vnc_lock_output(vs);
1424 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1425 vnc_write_u8(vs, 0);
1426 vnc_write_u16(vs, 1);
1427 vnc_framebuffer_update(vs, absolute, 0,
1428 ds_get_width(vs->ds), ds_get_height(vs->ds),
1429 VNC_ENCODING_POINTER_TYPE_CHANGE);
1430 vnc_unlock_output(vs);
1431 vnc_flush(vs);
1432 }
1433 vs->absolute = absolute;
1434 }
1435
1436 static void pointer_event(VncState *vs, int button_mask, int x, int y)
1437 {
1438 int buttons = 0;
1439 int dz = 0;
1440
1441 if (button_mask & 0x01)
1442 buttons |= MOUSE_EVENT_LBUTTON;
1443 if (button_mask & 0x02)
1444 buttons |= MOUSE_EVENT_MBUTTON;
1445 if (button_mask & 0x04)
1446 buttons |= MOUSE_EVENT_RBUTTON;
1447 if (button_mask & 0x08)
1448 dz = -1;
1449 if (button_mask & 0x10)
1450 dz = 1;
1451
1452 if (vs->absolute) {
1453 kbd_mouse_event(ds_get_width(vs->ds) > 1 ?
1454 x * 0x7FFF / (ds_get_width(vs->ds) - 1) : 0x4000,
1455 ds_get_height(vs->ds) > 1 ?
1456 y * 0x7FFF / (ds_get_height(vs->ds) - 1) : 0x4000,
1457 dz, buttons);
1458 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
1459 x -= 0x7FFF;
1460 y -= 0x7FFF;
1461
1462 kbd_mouse_event(x, y, dz, buttons);
1463 } else {
1464 if (vs->last_x != -1)
1465 kbd_mouse_event(x - vs->last_x,
1466 y - vs->last_y,
1467 dz, buttons);
1468 vs->last_x = x;
1469 vs->last_y = y;
1470 }
1471 }
1472
1473 static void reset_keys(VncState *vs)
1474 {
1475 int i;
1476 for(i = 0; i < 256; i++) {
1477 if (vs->modifiers_state[i]) {
1478 if (i & SCANCODE_GREY)
1479 kbd_put_keycode(SCANCODE_EMUL0);
1480 kbd_put_keycode(i | SCANCODE_UP);
1481 vs->modifiers_state[i] = 0;
1482 }
1483 }
1484 }
1485
1486 static void press_key(VncState *vs, int keysym)
1487 {
1488 int keycode = keysym2scancode(vs->vd->kbd_layout, keysym) & SCANCODE_KEYMASK;
1489 if (keycode & SCANCODE_GREY)
1490 kbd_put_keycode(SCANCODE_EMUL0);
1491 kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
1492 if (keycode & SCANCODE_GREY)
1493 kbd_put_keycode(SCANCODE_EMUL0);
1494 kbd_put_keycode(keycode | SCANCODE_UP);
1495 }
1496
1497 static void kbd_leds(void *opaque, int ledstate)
1498 {
1499 VncState *vs = opaque;
1500 int caps, num;
1501
1502 caps = ledstate & QEMU_CAPS_LOCK_LED ? 1 : 0;
1503 num = ledstate & QEMU_NUM_LOCK_LED ? 1 : 0;
1504
1505 if (vs->modifiers_state[0x3a] != caps) {
1506 vs->modifiers_state[0x3a] = caps;
1507 }
1508 if (vs->modifiers_state[0x45] != num) {
1509 vs->modifiers_state[0x45] = num;
1510 }
1511 }
1512
1513 static void do_key_event(VncState *vs, int down, int keycode, int sym)
1514 {
1515 /* QEMU console switch */
1516 switch(keycode) {
1517 case 0x2a: /* Left Shift */
1518 case 0x36: /* Right Shift */
1519 case 0x1d: /* Left CTRL */
1520 case 0x9d: /* Right CTRL */
1521 case 0x38: /* Left ALT */
1522 case 0xb8: /* Right ALT */
1523 if (down)
1524 vs->modifiers_state[keycode] = 1;
1525 else
1526 vs->modifiers_state[keycode] = 0;
1527 break;
1528 case 0x02 ... 0x0a: /* '1' to '9' keys */
1529 if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) {
1530 /* Reset the modifiers sent to the current console */
1531 reset_keys(vs);
1532 console_select(keycode - 0x02);
1533 return;
1534 }
1535 break;
1536 case 0x3a: /* CapsLock */
1537 case 0x45: /* NumLock */
1538 if (down)
1539 vs->modifiers_state[keycode] ^= 1;
1540 break;
1541 }
1542
1543 if (down && vs->vd->lock_key_sync &&
1544 keycode_is_keypad(vs->vd->kbd_layout, keycode)) {
1545 /* If the numlock state needs to change then simulate an additional
1546 keypress before sending this one. This will happen if the user
1547 toggles numlock away from the VNC window.
1548 */
1549 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) {
1550 if (!vs->modifiers_state[0x45]) {
1551 vs->modifiers_state[0x45] = 1;
1552 press_key(vs, 0xff7f);
1553 }
1554 } else {
1555 if (vs->modifiers_state[0x45]) {
1556 vs->modifiers_state[0x45] = 0;
1557 press_key(vs, 0xff7f);
1558 }
1559 }
1560 }
1561
1562 if (down && vs->vd->lock_key_sync &&
1563 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) {
1564 /* If the capslock state needs to change then simulate an additional
1565 keypress before sending this one. This will happen if the user
1566 toggles capslock away from the VNC window.
1567 */
1568 int uppercase = !!(sym >= 'A' && sym <= 'Z');
1569 int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]);
1570 int capslock = !!(vs->modifiers_state[0x3a]);
1571 if (capslock) {
1572 if (uppercase == shift) {
1573 vs->modifiers_state[0x3a] = 0;
1574 press_key(vs, 0xffe5);
1575 }
1576 } else {
1577 if (uppercase != shift) {
1578 vs->modifiers_state[0x3a] = 1;
1579 press_key(vs, 0xffe5);
1580 }
1581 }
1582 }
1583
1584 if (is_graphic_console()) {
1585 if (keycode & SCANCODE_GREY)
1586 kbd_put_keycode(SCANCODE_EMUL0);
1587 if (down)
1588 kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
1589 else
1590 kbd_put_keycode(keycode | SCANCODE_UP);
1591 } else {
1592 bool numlock = vs->modifiers_state[0x45];
1593 bool control = (vs->modifiers_state[0x1d] ||
1594 vs->modifiers_state[0x9d]);
1595 /* QEMU console emulation */
1596 if (down) {
1597 switch (keycode) {
1598 case 0x2a: /* Left Shift */
1599 case 0x36: /* Right Shift */
1600 case 0x1d: /* Left CTRL */
1601 case 0x9d: /* Right CTRL */
1602 case 0x38: /* Left ALT */
1603 case 0xb8: /* Right ALT */
1604 break;
1605 case 0xc8:
1606 kbd_put_keysym(QEMU_KEY_UP);
1607 break;
1608 case 0xd0:
1609 kbd_put_keysym(QEMU_KEY_DOWN);
1610 break;
1611 case 0xcb:
1612 kbd_put_keysym(QEMU_KEY_LEFT);
1613 break;
1614 case 0xcd:
1615 kbd_put_keysym(QEMU_KEY_RIGHT);
1616 break;
1617 case 0xd3:
1618 kbd_put_keysym(QEMU_KEY_DELETE);
1619 break;
1620 case 0xc7:
1621 kbd_put_keysym(QEMU_KEY_HOME);
1622 break;
1623 case 0xcf:
1624 kbd_put_keysym(QEMU_KEY_END);
1625 break;
1626 case 0xc9:
1627 kbd_put_keysym(QEMU_KEY_PAGEUP);
1628 break;
1629 case 0xd1:
1630 kbd_put_keysym(QEMU_KEY_PAGEDOWN);
1631 break;
1632
1633 case 0x47:
1634 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME);
1635 break;
1636 case 0x48:
1637 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP);
1638 break;
1639 case 0x49:
1640 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP);
1641 break;
1642 case 0x4b:
1643 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT);
1644 break;
1645 case 0x4c:
1646 kbd_put_keysym('5');
1647 break;
1648 case 0x4d:
1649 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT);
1650 break;
1651 case 0x4f:
1652 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END);
1653 break;
1654 case 0x50:
1655 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN);
1656 break;
1657 case 0x51:
1658 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN);
1659 break;
1660 case 0x52:
1661 kbd_put_keysym('0');
1662 break;
1663 case 0x53:
1664 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE);
1665 break;
1666
1667 case 0xb5:
1668 kbd_put_keysym('/');
1669 break;
1670 case 0x37:
1671 kbd_put_keysym('*');
1672 break;
1673 case 0x4a:
1674 kbd_put_keysym('-');
1675 break;
1676 case 0x4e:
1677 kbd_put_keysym('+');
1678 break;
1679 case 0x9c:
1680 kbd_put_keysym('\n');
1681 break;
1682
1683 default:
1684 if (control) {
1685 kbd_put_keysym(sym & 0x1f);
1686 } else {
1687 kbd_put_keysym(sym);
1688 }
1689 break;
1690 }
1691 }
1692 }
1693 }
1694
1695 static void vnc_release_modifiers(VncState *vs)
1696 {
1697 static const int keycodes[] = {
1698 /* shift, control, alt keys, both left & right */
1699 0x2a, 0x36, 0x1d, 0x9d, 0x38, 0xb8,
1700 };
1701 int i, keycode;
1702
1703 if (!is_graphic_console()) {
1704 return;
1705 }
1706 for (i = 0; i < ARRAY_SIZE(keycodes); i++) {
1707 keycode = keycodes[i];
1708 if (!vs->modifiers_state[keycode]) {
1709 continue;
1710 }
1711 if (keycode & SCANCODE_GREY) {
1712 kbd_put_keycode(SCANCODE_EMUL0);
1713 }
1714 kbd_put_keycode(keycode | SCANCODE_UP);
1715 }
1716 }
1717
1718 static void key_event(VncState *vs, int down, uint32_t sym)
1719 {
1720 int keycode;
1721 int lsym = sym;
1722
1723 if (lsym >= 'A' && lsym <= 'Z' && is_graphic_console()) {
1724 lsym = lsym - 'A' + 'a';
1725 }
1726
1727 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF) & SCANCODE_KEYMASK;
1728 do_key_event(vs, down, keycode, sym);
1729 }
1730
1731 static void ext_key_event(VncState *vs, int down,
1732 uint32_t sym, uint16_t keycode)
1733 {
1734 /* if the user specifies a keyboard layout, always use it */
1735 if (keyboard_layout)
1736 key_event(vs, down, sym);
1737 else
1738 do_key_event(vs, down, keycode, sym);
1739 }
1740
1741 static void framebuffer_update_request(VncState *vs, int incremental,
1742 int x_position, int y_position,
1743 int w, int h)
1744 {
1745 int i;
1746 const size_t width = ds_get_width(vs->ds) / 16;
1747
1748 if (y_position > ds_get_height(vs->ds))
1749 y_position = ds_get_height(vs->ds);
1750 if (y_position + h >= ds_get_height(vs->ds))
1751 h = ds_get_height(vs->ds) - y_position;
1752
1753 vs->need_update = 1;
1754 if (!incremental) {
1755 vs->force_update = 1;
1756 for (i = 0; i < h; i++) {
1757 bitmap_set(vs->dirty[y_position + i], 0, width);
1758 bitmap_clear(vs->dirty[y_position + i], width,
1759 VNC_DIRTY_BITS - width);
1760 }
1761 }
1762 }
1763
1764 static void send_ext_key_event_ack(VncState *vs)
1765 {
1766 vnc_lock_output(vs);
1767 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1768 vnc_write_u8(vs, 0);
1769 vnc_write_u16(vs, 1);
1770 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1771 VNC_ENCODING_EXT_KEY_EVENT);
1772 vnc_unlock_output(vs);
1773 vnc_flush(vs);
1774 }
1775
1776 static void send_ext_audio_ack(VncState *vs)
1777 {
1778 vnc_lock_output(vs);
1779 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1780 vnc_write_u8(vs, 0);
1781 vnc_write_u16(vs, 1);
1782 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1783 VNC_ENCODING_AUDIO);
1784 vnc_unlock_output(vs);
1785 vnc_flush(vs);
1786 }
1787
1788 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
1789 {
1790 int i;
1791 unsigned int enc = 0;
1792
1793 vs->features = 0;
1794 vs->vnc_encoding = 0;
1795 vs->tight.compression = 9;
1796 vs->tight.quality = -1; /* Lossless by default */
1797 vs->absolute = -1;
1798
1799 /*
1800 * Start from the end because the encodings are sent in order of preference.
1801 * This way the preferred encoding (first encoding defined in the array)
1802 * will be set at the end of the loop.
1803 */
1804 for (i = n_encodings - 1; i >= 0; i--) {
1805 enc = encodings[i];
1806 switch (enc) {
1807 case VNC_ENCODING_RAW:
1808 vs->vnc_encoding = enc;
1809 break;
1810 case VNC_ENCODING_COPYRECT:
1811 vs->features |= VNC_FEATURE_COPYRECT_MASK;
1812 break;
1813 case VNC_ENCODING_HEXTILE:
1814 vs->features |= VNC_FEATURE_HEXTILE_MASK;
1815 vs->vnc_encoding = enc;
1816 break;
1817 case VNC_ENCODING_TIGHT:
1818 vs->features |= VNC_FEATURE_TIGHT_MASK;
1819 vs->vnc_encoding = enc;
1820 break;
1821 case VNC_ENCODING_TIGHT_PNG:
1822 vs->features |= VNC_FEATURE_TIGHT_PNG_MASK;
1823 vs->vnc_encoding = enc;
1824 break;
1825 case VNC_ENCODING_ZLIB:
1826 vs->features |= VNC_FEATURE_ZLIB_MASK;
1827 vs->vnc_encoding = enc;
1828 break;
1829 case VNC_ENCODING_ZRLE:
1830 vs->features |= VNC_FEATURE_ZRLE_MASK;
1831 vs->vnc_encoding = enc;
1832 break;
1833 case VNC_ENCODING_ZYWRLE:
1834 vs->features |= VNC_FEATURE_ZYWRLE_MASK;
1835 vs->vnc_encoding = enc;
1836 break;
1837 case VNC_ENCODING_DESKTOPRESIZE:
1838 vs->features |= VNC_FEATURE_RESIZE_MASK;
1839 break;
1840 case VNC_ENCODING_POINTER_TYPE_CHANGE:
1841 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK;
1842 break;
1843 case VNC_ENCODING_RICH_CURSOR:
1844 vs->features |= VNC_FEATURE_RICH_CURSOR_MASK;
1845 break;
1846 case VNC_ENCODING_EXT_KEY_EVENT:
1847 send_ext_key_event_ack(vs);
1848 break;
1849 case VNC_ENCODING_AUDIO:
1850 send_ext_audio_ack(vs);
1851 break;
1852 case VNC_ENCODING_WMVi:
1853 vs->features |= VNC_FEATURE_WMVI_MASK;
1854 break;
1855 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9:
1856 vs->tight.compression = (enc & 0x0F);
1857 break;
1858 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9:
1859 if (vs->vd->lossy) {
1860 vs->tight.quality = (enc & 0x0F);
1861 }
1862 break;
1863 default:
1864 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc);
1865 break;
1866 }
1867 }
1868 vnc_desktop_resize(vs);
1869 check_pointer_type_change(&vs->mouse_mode_notifier, NULL);
1870 }
1871
1872 static void set_pixel_conversion(VncState *vs)
1873 {
1874 if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
1875 (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG) &&
1876 !memcmp(&(vs->clientds.pf), &(vs->ds->surface->pf), sizeof(PixelFormat))) {
1877 vs->write_pixels = vnc_write_pixels_copy;
1878 vnc_hextile_set_pixel_conversion(vs, 0);
1879 } else {
1880 vs->write_pixels = vnc_write_pixels_generic;
1881 vnc_hextile_set_pixel_conversion(vs, 1);
1882 }
1883 }
1884
1885 static void set_pixel_format(VncState *vs,
1886 int bits_per_pixel, int depth,
1887 int big_endian_flag, int true_color_flag,
1888 int red_max, int green_max, int blue_max,
1889 int red_shift, int green_shift, int blue_shift)
1890 {
1891 if (!true_color_flag) {
1892 vnc_client_error(vs);
1893 return;
1894 }
1895
1896 vs->clientds = *(vs->vd->guest.ds);
1897 vs->clientds.pf.rmax = red_max;
1898 vs->clientds.pf.rbits = hweight_long(red_max);
1899 vs->clientds.pf.rshift = red_shift;
1900 vs->clientds.pf.rmask = red_max << red_shift;
1901 vs->clientds.pf.gmax = green_max;
1902 vs->clientds.pf.gbits = hweight_long(green_max);
1903 vs->clientds.pf.gshift = green_shift;
1904 vs->clientds.pf.gmask = green_max << green_shift;
1905 vs->clientds.pf.bmax = blue_max;
1906 vs->clientds.pf.bbits = hweight_long(blue_max);
1907 vs->clientds.pf.bshift = blue_shift;
1908 vs->clientds.pf.bmask = blue_max << blue_shift;
1909 vs->clientds.pf.bits_per_pixel = bits_per_pixel;
1910 vs->clientds.pf.bytes_per_pixel = bits_per_pixel / 8;
1911 vs->clientds.pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel;
1912 vs->clientds.flags = big_endian_flag ? QEMU_BIG_ENDIAN_FLAG : 0x00;
1913
1914 set_pixel_conversion(vs);
1915
1916 vga_hw_invalidate();
1917 vga_hw_update();
1918 }
1919
1920 static void pixel_format_message (VncState *vs) {
1921 char pad[3] = { 0, 0, 0 };
1922
1923 vnc_write_u8(vs, vs->ds->surface->pf.bits_per_pixel); /* bits-per-pixel */
1924 vnc_write_u8(vs, vs->ds->surface->pf.depth); /* depth */
1925
1926 #ifdef HOST_WORDS_BIGENDIAN
1927 vnc_write_u8(vs, 1); /* big-endian-flag */
1928 #else
1929 vnc_write_u8(vs, 0); /* big-endian-flag */
1930 #endif
1931 vnc_write_u8(vs, 1); /* true-color-flag */
1932 vnc_write_u16(vs, vs->ds->surface->pf.rmax); /* red-max */
1933 vnc_write_u16(vs, vs->ds->surface->pf.gmax); /* green-max */
1934 vnc_write_u16(vs, vs->ds->surface->pf.bmax); /* blue-max */
1935 vnc_write_u8(vs, vs->ds->surface->pf.rshift); /* red-shift */
1936 vnc_write_u8(vs, vs->ds->surface->pf.gshift); /* green-shift */
1937 vnc_write_u8(vs, vs->ds->surface->pf.bshift); /* blue-shift */
1938
1939 vnc_hextile_set_pixel_conversion(vs, 0);
1940
1941 vs->clientds = *(vs->ds->surface);
1942 vs->clientds.flags &= ~QEMU_ALLOCATED_FLAG;
1943 vs->write_pixels = vnc_write_pixels_copy;
1944
1945 vnc_write(vs, pad, 3); /* padding */
1946 }
1947
1948 static void vnc_dpy_setdata(DisplayState *ds)
1949 {
1950 VncDisplay *vd = ds->opaque;
1951
1952 *(vd->guest.ds) = *(ds->surface);
1953 vnc_dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
1954 }
1955
1956 static void vnc_colordepth(VncState *vs)
1957 {
1958 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) {
1959 /* Sending a WMVi message to notify the client*/
1960 vnc_lock_output(vs);
1961 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1962 vnc_write_u8(vs, 0);
1963 vnc_write_u16(vs, 1); /* number of rects */
1964 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds),
1965 ds_get_height(vs->ds), VNC_ENCODING_WMVi);
1966 pixel_format_message(vs);
1967 vnc_unlock_output(vs);
1968 vnc_flush(vs);
1969 } else {
1970 set_pixel_conversion(vs);
1971 }
1972 }
1973
1974 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
1975 {
1976 int i;
1977 uint16_t limit;
1978 VncDisplay *vd = vs->vd;
1979
1980 if (data[0] > 3) {
1981 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
1982 if (!qemu_timer_expired(vd->timer, qemu_get_clock_ms(rt_clock) + vd->timer_interval))
1983 qemu_mod_timer(vd->timer, qemu_get_clock_ms(rt_clock) + vd->timer_interval);
1984 }
1985
1986 switch (data[0]) {
1987 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT:
1988 if (len == 1)
1989 return 20;
1990
1991 set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5),
1992 read_u8(data, 6), read_u8(data, 7),
1993 read_u16(data, 8), read_u16(data, 10),
1994 read_u16(data, 12), read_u8(data, 14),
1995 read_u8(data, 15), read_u8(data, 16));
1996 break;
1997 case VNC_MSG_CLIENT_SET_ENCODINGS:
1998 if (len == 1)
1999 return 4;
2000
2001 if (len == 4) {
2002 limit = read_u16(data, 2);
2003 if (limit > 0)
2004 return 4 + (limit * 4);
2005 } else
2006 limit = read_u16(data, 2);
2007
2008 for (i = 0; i < limit; i++) {
2009 int32_t val = read_s32(data, 4 + (i * 4));
2010 memcpy(data + 4 + (i * 4), &val, sizeof(val));
2011 }
2012
2013 set_encodings(vs, (int32_t *)(data + 4), limit);
2014 break;
2015 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST:
2016 if (len == 1)
2017 return 10;
2018
2019 framebuffer_update_request(vs,
2020 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4),
2021 read_u16(data, 6), read_u16(data, 8));
2022 break;
2023 case VNC_MSG_CLIENT_KEY_EVENT:
2024 if (len == 1)
2025 return 8;
2026
2027 key_event(vs, read_u8(data, 1), read_u32(data, 4));
2028 break;
2029 case VNC_MSG_CLIENT_POINTER_EVENT:
2030 if (len == 1)
2031 return 6;
2032
2033 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
2034 break;
2035 case VNC_MSG_CLIENT_CUT_TEXT:
2036 if (len == 1)
2037 return 8;
2038
2039 if (len == 8) {
2040 uint32_t dlen = read_u32(data, 4);
2041 if (dlen > 0)
2042 return 8 + dlen;
2043 }
2044
2045 client_cut_text(vs, read_u32(data, 4), data + 8);
2046 break;
2047 case VNC_MSG_CLIENT_QEMU:
2048 if (len == 1)
2049 return 2;
2050
2051 switch (read_u8(data, 1)) {
2052 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT:
2053 if (len == 2)
2054 return 12;
2055
2056 ext_key_event(vs, read_u16(data, 2),
2057 read_u32(data, 4), read_u32(data, 8));
2058 break;
2059 case VNC_MSG_CLIENT_QEMU_AUDIO:
2060 if (len == 2)
2061 return 4;
2062
2063 switch (read_u16 (data, 2)) {
2064 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE:
2065 audio_add(vs);
2066 break;
2067 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE:
2068 audio_del(vs);
2069 break;
2070 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT:
2071 if (len == 4)
2072 return 10;
2073 switch (read_u8(data, 4)) {
2074 case 0: vs->as.fmt = AUD_FMT_U8; break;
2075 case 1: vs->as.fmt = AUD_FMT_S8; break;
2076 case 2: vs->as.fmt = AUD_FMT_U16; break;
2077 case 3: vs->as.fmt = AUD_FMT_S16; break;
2078 case 4: vs->as.fmt = AUD_FMT_U32; break;
2079 case 5: vs->as.fmt = AUD_FMT_S32; break;
2080 default:
2081 printf("Invalid audio format %d\n", read_u8(data, 4));
2082 vnc_client_error(vs);
2083 break;
2084 }
2085 vs->as.nchannels = read_u8(data, 5);
2086 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) {
2087 printf("Invalid audio channel coount %d\n",
2088 read_u8(data, 5));
2089 vnc_client_error(vs);
2090 break;
2091 }
2092 vs->as.freq = read_u32(data, 6);
2093 break;
2094 default:
2095 printf ("Invalid audio message %d\n", read_u8(data, 4));
2096 vnc_client_error(vs);
2097 break;
2098 }
2099 break;
2100
2101 default:
2102 printf("Msg: %d\n", read_u16(data, 0));
2103 vnc_client_error(vs);
2104 break;
2105 }
2106 break;
2107 default:
2108 printf("Msg: %d\n", data[0]);
2109 vnc_client_error(vs);
2110 break;
2111 }
2112
2113 vnc_read_when(vs, protocol_client_msg, 1);
2114 return 0;
2115 }
2116
2117 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
2118 {
2119 char buf[1024];
2120 VncShareMode mode;
2121 int size;
2122
2123 mode = data[0] ? VNC_SHARE_MODE_SHARED : VNC_SHARE_MODE_EXCLUSIVE;
2124 switch (vs->vd->share_policy) {
2125 case VNC_SHARE_POLICY_IGNORE:
2126 /*
2127 * Ignore the shared flag. Nothing to do here.
2128 *
2129 * Doesn't conform to the rfb spec but is traditional qemu
2130 * behavior, thus left here as option for compatibility
2131 * reasons.
2132 */
2133 break;
2134 case VNC_SHARE_POLICY_ALLOW_EXCLUSIVE:
2135 /*
2136 * Policy: Allow clients ask for exclusive access.
2137 *
2138 * Implementation: When a client asks for exclusive access,
2139 * disconnect all others. Shared connects are allowed as long
2140 * as no exclusive connection exists.
2141 *
2142 * This is how the rfb spec suggests to handle the shared flag.
2143 */
2144 if (mode == VNC_SHARE_MODE_EXCLUSIVE) {
2145 VncState *client;
2146 QTAILQ_FOREACH(client, &vs->vd->clients, next) {
2147 if (vs == client) {
2148 continue;
2149 }
2150 if (client->share_mode != VNC_SHARE_MODE_EXCLUSIVE &&
2151 client->share_mode != VNC_SHARE_MODE_SHARED) {
2152 continue;
2153 }
2154 vnc_disconnect_start(client);
2155 }
2156 }
2157 if (mode == VNC_SHARE_MODE_SHARED) {
2158 if (vs->vd->num_exclusive > 0) {
2159 vnc_disconnect_start(vs);
2160 return 0;
2161 }
2162 }
2163 break;
2164 case VNC_SHARE_POLICY_FORCE_SHARED:
2165 /*
2166 * Policy: Shared connects only.
2167 * Implementation: Disallow clients asking for exclusive access.
2168 *
2169 * Useful for shared desktop sessions where you don't want
2170 * someone forgetting to say -shared when running the vnc
2171 * client disconnect everybody else.
2172 */
2173 if (mode == VNC_SHARE_MODE_EXCLUSIVE) {
2174 vnc_disconnect_start(vs);
2175 return 0;
2176 }
2177 break;
2178 }
2179 vnc_set_share_mode(vs, mode);
2180
2181 vs->client_width = ds_get_width(vs->ds);
2182 vs->client_height = ds_get_height(vs->ds);
2183 vnc_write_u16(vs, vs->client_width);
2184 vnc_write_u16(vs, vs->client_height);
2185
2186 pixel_format_message(vs);
2187
2188 if (qemu_name)
2189 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name);
2190 else
2191 size = snprintf(buf, sizeof(buf), "QEMU");
2192
2193 vnc_write_u32(vs, size);
2194 vnc_write(vs, buf, size);
2195 vnc_flush(vs);
2196
2197 vnc_client_cache_auth(vs);
2198 vnc_qmp_event(vs, QEVENT_VNC_INITIALIZED);
2199
2200 vnc_read_when(vs, protocol_client_msg, 1);
2201
2202 return 0;
2203 }
2204
2205 void start_client_init(VncState *vs)
2206 {
2207 vnc_read_when(vs, protocol_client_init, 1);
2208 }
2209
2210 static void make_challenge(VncState *vs)
2211 {
2212 int i;
2213
2214 srand(time(NULL)+getpid()+getpid()*987654+rand());
2215
2216 for (i = 0 ; i < sizeof(vs->challenge) ; i++)
2217 vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0));
2218 }
2219
2220 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
2221 {
2222 unsigned char response[VNC_AUTH_CHALLENGE_SIZE];
2223 int i, j, pwlen;
2224 unsigned char key[8];
2225 time_t now = time(NULL);
2226
2227 if (!vs->vd->password) {
2228 VNC_DEBUG("No password configured on server");
2229 goto reject;
2230 }
2231 if (vs->vd->expires < now) {
2232 VNC_DEBUG("Password is expired");
2233 goto reject;
2234 }
2235
2236 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
2237
2238 /* Calculate the expected challenge response */
2239 pwlen = strlen(vs->vd->password);
2240 for (i=0; i<sizeof(key); i++)
2241 key[i] = i<pwlen ? vs->vd->password[i] : 0;
2242 deskey(key, EN0);
2243 for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
2244 des(response+j, response+j);
2245
2246 /* Compare expected vs actual challenge response */
2247 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) {
2248 VNC_DEBUG("Client challenge response did not match\n");
2249 goto reject;
2250 } else {
2251 VNC_DEBUG("Accepting VNC challenge response\n");
2252 vnc_write_u32(vs, 0); /* Accept auth */
2253 vnc_flush(vs);
2254
2255 start_client_init(vs);
2256 }
2257 return 0;
2258
2259 reject:
2260 vnc_write_u32(vs, 1); /* Reject auth */
2261 if (vs->minor >= 8) {
2262 static const char err[] = "Authentication failed";
2263 vnc_write_u32(vs, sizeof(err));
2264 vnc_write(vs, err, sizeof(err));
2265 }
2266 vnc_flush(vs);
2267 vnc_client_error(vs);
2268 return 0;
2269 }
2270
2271 void start_auth_vnc(VncState *vs)
2272 {
2273 make_challenge(vs);
2274 /* Send client a 'random' challenge */
2275 vnc_write(vs, vs->challenge, sizeof(vs->challenge));
2276 vnc_flush(vs);
2277
2278 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
2279 }
2280
2281
2282 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
2283 {
2284 /* We only advertise 1 auth scheme at a time, so client
2285 * must pick the one we sent. Verify this */
2286 if (data[0] != vs->auth) { /* Reject auth */
2287 VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]);
2288 vnc_write_u32(vs, 1);
2289 if (vs->minor >= 8) {
2290 static const char err[] = "Authentication failed";
2291 vnc_write_u32(vs, sizeof(err));
2292 vnc_write(vs, err, sizeof(err));
2293 }
2294 vnc_client_error(vs);
2295 } else { /* Accept requested auth */
2296 VNC_DEBUG("Client requested auth %d\n", (int)data[0]);
2297 switch (vs->auth) {
2298 case VNC_AUTH_NONE:
2299 VNC_DEBUG("Accept auth none\n");
2300 if (vs->minor >= 8) {
2301 vnc_write_u32(vs, 0); /* Accept auth completion */
2302 vnc_flush(vs);
2303 }
2304 start_client_init(vs);
2305 break;
2306
2307 case VNC_AUTH_VNC:
2308 VNC_DEBUG("Start VNC auth\n");
2309 start_auth_vnc(vs);
2310 break;
2311
2312 #ifdef CONFIG_VNC_TLS
2313 case VNC_AUTH_VENCRYPT:
2314 VNC_DEBUG("Accept VeNCrypt auth\n");
2315 start_auth_vencrypt(vs);
2316 break;
2317 #endif /* CONFIG_VNC_TLS */
2318
2319 #ifdef CONFIG_VNC_SASL
2320 case VNC_AUTH_SASL:
2321 VNC_DEBUG("Accept SASL auth\n");
2322 start_auth_sasl(vs);
2323 break;
2324 #endif /* CONFIG_VNC_SASL */
2325
2326 default: /* Should not be possible, but just in case */
2327 VNC_DEBUG("Reject auth %d server code bug\n", vs->auth);
2328 vnc_write_u8(vs, 1);
2329 if (vs->minor >= 8) {
2330 static const char err[] = "Authentication failed";
2331 vnc_write_u32(vs, sizeof(err));
2332 vnc_write(vs, err, sizeof(err));
2333 }
2334 vnc_client_error(vs);
2335 }
2336 }
2337 return 0;
2338 }
2339
2340 static int protocol_version(VncState *vs, uint8_t *version, size_t len)
2341 {
2342 char local[13];
2343
2344 memcpy(local, version, 12);
2345 local[12] = 0;
2346
2347 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) {
2348 VNC_DEBUG("Malformed protocol version %s\n", local);
2349 vnc_client_error(vs);
2350 return 0;
2351 }
2352 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
2353 if (vs->major != 3 ||
2354 (vs->minor != 3 &&
2355 vs->minor != 4 &&
2356 vs->minor != 5 &&
2357 vs->minor != 7 &&
2358 vs->minor != 8)) {
2359 VNC_DEBUG("Unsupported client version\n");
2360 vnc_write_u32(vs, VNC_AUTH_INVALID);
2361 vnc_flush(vs);
2362 vnc_client_error(vs);
2363 return 0;
2364 }
2365 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated
2366 * as equivalent to v3.3 by servers
2367 */
2368 if (vs->minor == 4 || vs->minor == 5)
2369 vs->minor = 3;
2370
2371 if (vs->minor == 3) {
2372 if (vs->auth == VNC_AUTH_NONE) {
2373 VNC_DEBUG("Tell client auth none\n");
2374 vnc_write_u32(vs, vs->auth);
2375 vnc_flush(vs);
2376 start_client_init(vs);
2377 } else if (vs->auth == VNC_AUTH_VNC) {
2378 VNC_DEBUG("Tell client VNC auth\n");
2379 vnc_write_u32(vs, vs->auth);
2380 vnc_flush(vs);
2381 start_auth_vnc(vs);
2382 } else {
2383 VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth);
2384 vnc_write_u32(vs, VNC_AUTH_INVALID);
2385 vnc_flush(vs);
2386 vnc_client_error(vs);
2387 }
2388 } else {
2389 VNC_DEBUG("Telling client we support auth %d\n", vs->auth);
2390 vnc_write_u8(vs, 1); /* num auth */
2391 vnc_write_u8(vs, vs->auth);
2392 vnc_read_when(vs, protocol_client_auth, 1);
2393 vnc_flush(vs);
2394 }
2395
2396 return 0;
2397 }
2398
2399 static VncRectStat *vnc_stat_rect(VncDisplay *vd, int x, int y)
2400 {
2401 struct VncSurface *vs = &vd->guest;
2402
2403 return &vs->stats[y / VNC_STAT_RECT][x / VNC_STAT_RECT];
2404 }
2405
2406 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h)
2407 {
2408 int i, j;
2409
2410 w = (x + w) / VNC_STAT_RECT;
2411 h = (y + h) / VNC_STAT_RECT;
2412 x /= VNC_STAT_RECT;
2413 y /= VNC_STAT_RECT;
2414
2415 for (j = y; j <= h; j++) {
2416 for (i = x; i <= w; i++) {
2417 vs->lossy_rect[j][i] = 1;
2418 }
2419 }
2420 }
2421
2422 static int vnc_refresh_lossy_rect(VncDisplay *vd, int x, int y)
2423 {
2424 VncState *vs;
2425 int sty = y / VNC_STAT_RECT;
2426 int stx = x / VNC_STAT_RECT;
2427 int has_dirty = 0;
2428
2429 y = y / VNC_STAT_RECT * VNC_STAT_RECT;
2430 x = x / VNC_STAT_RECT * VNC_STAT_RECT;
2431
2432 QTAILQ_FOREACH(vs, &vd->clients, next) {
2433 int j;
2434
2435 /* kernel send buffers are full -> refresh later */
2436 if (vs->output.offset) {
2437 continue;
2438 }
2439
2440 if (!vs->lossy_rect[sty][stx]) {
2441 continue;
2442 }
2443
2444 vs->lossy_rect[sty][stx] = 0;
2445 for (j = 0; j < VNC_STAT_RECT; ++j) {
2446 bitmap_set(vs->dirty[y + j], x / 16, VNC_STAT_RECT / 16);
2447 }
2448 has_dirty++;
2449 }
2450
2451 return has_dirty;
2452 }
2453
2454 static int vnc_update_stats(VncDisplay *vd, struct timeval * tv)
2455 {
2456 int x, y;
2457 struct timeval res;
2458 int has_dirty = 0;
2459
2460 for (y = 0; y < vd->guest.ds->height; y += VNC_STAT_RECT) {
2461 for (x = 0; x < vd->guest.ds->width; x += VNC_STAT_RECT) {
2462 VncRectStat *rect = vnc_stat_rect(vd, x, y);
2463
2464 rect->updated = false;
2465 }
2466 }
2467
2468 qemu_timersub(tv, &VNC_REFRESH_STATS, &res);
2469
2470 if (timercmp(&vd->guest.last_freq_check, &res, >)) {
2471 return has_dirty;
2472 }
2473 vd->guest.last_freq_check = *tv;
2474
2475 for (y = 0; y < vd->guest.ds->height; y += VNC_STAT_RECT) {
2476 for (x = 0; x < vd->guest.ds->width; x += VNC_STAT_RECT) {
2477 VncRectStat *rect= vnc_stat_rect(vd, x, y);
2478 int count = ARRAY_SIZE(rect->times);
2479 struct timeval min, max;
2480
2481 if (!timerisset(&rect->times[count - 1])) {
2482 continue ;
2483 }
2484
2485 max = rect->times[(rect->idx + count - 1) % count];
2486 qemu_timersub(tv, &max, &res);
2487
2488 if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) {
2489 rect->freq = 0;
2490 has_dirty += vnc_refresh_lossy_rect(vd, x, y);
2491 memset(rect->times, 0, sizeof (rect->times));
2492 continue ;
2493 }
2494
2495 min = rect->times[rect->idx];
2496 max = rect->times[(rect->idx + count - 1) % count];
2497 qemu_timersub(&max, &min, &res);
2498
2499 rect->freq = res.tv_sec + res.tv_usec / 1000000.;
2500 rect->freq /= count;
2501 rect->freq = 1. / rect->freq;
2502 }
2503 }
2504 return has_dirty;
2505 }
2506
2507 double vnc_update_freq(VncState *vs, int x, int y, int w, int h)
2508 {
2509 int i, j;
2510 double total = 0;
2511 int num = 0;
2512
2513 x = (x / VNC_STAT_RECT) * VNC_STAT_RECT;
2514 y = (y / VNC_STAT_RECT) * VNC_STAT_RECT;
2515
2516 for (j = y; j <= y + h; j += VNC_STAT_RECT) {
2517 for (i = x; i <= x + w; i += VNC_STAT_RECT) {
2518 total += vnc_stat_rect(vs->vd, i, j)->freq;
2519 num++;
2520 }
2521 }
2522
2523 if (num) {
2524 return total / num;
2525 } else {
2526 return 0;
2527 }
2528 }
2529
2530 static void vnc_rect_updated(VncDisplay *vd, int x, int y, struct timeval * tv)
2531 {
2532 VncRectStat *rect;
2533
2534 rect = vnc_stat_rect(vd, x, y);
2535 if (rect->updated) {
2536 return ;
2537 }
2538 rect->times[rect->idx] = *tv;
2539 rect->idx = (rect->idx + 1) % ARRAY_SIZE(rect->times);
2540 rect->updated = true;
2541 }
2542
2543 static int vnc_refresh_server_surface(VncDisplay *vd)
2544 {
2545 int y;
2546 uint8_t *guest_row;
2547 uint8_t *server_row;
2548 int cmp_bytes;
2549 VncState *vs;
2550 int has_dirty = 0;
2551
2552 struct timeval tv = { 0, 0 };
2553
2554 if (!vd->non_adaptive) {
2555 gettimeofday(&tv, NULL);
2556 has_dirty = vnc_update_stats(vd, &tv);
2557 }
2558
2559 /*
2560 * Walk through the guest dirty map.
2561 * Check and copy modified bits from guest to server surface.
2562 * Update server dirty map.
2563 */
2564 cmp_bytes = 16 * ds_get_bytes_per_pixel(vd->ds);
2565 if (cmp_bytes > vd->ds->surface->linesize) {
2566 cmp_bytes = vd->ds->surface->linesize;
2567 }
2568 guest_row = vd->guest.ds->data;
2569 server_row = vd->server->data;
2570 for (y = 0; y < vd->guest.ds->height; y++) {
2571 if (!bitmap_empty(vd->guest.dirty[y], VNC_DIRTY_BITS)) {
2572 int x;
2573 uint8_t *guest_ptr;
2574 uint8_t *server_ptr;
2575
2576 guest_ptr = guest_row;
2577 server_ptr = server_row;
2578
2579 for (x = 0; x + 15 < vd->guest.ds->width;
2580 x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) {
2581 if (!test_and_clear_bit((x / 16), vd->guest.dirty[y]))
2582 continue;
2583 if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0)
2584 continue;
2585 memcpy(server_ptr, guest_ptr, cmp_bytes);
2586 if (!vd->non_adaptive)
2587 vnc_rect_updated(vd, x, y, &tv);
2588 QTAILQ_FOREACH(vs, &vd->clients, next) {
2589 set_bit((x / 16), vs->dirty[y]);
2590 }
2591 has_dirty++;
2592 }
2593 }
2594 guest_row += ds_get_linesize(vd->ds);
2595 server_row += ds_get_linesize(vd->ds);
2596 }
2597 return has_dirty;
2598 }
2599
2600 static void vnc_refresh(void *opaque)
2601 {
2602 VncDisplay *vd = opaque;
2603 VncState *vs, *vn;
2604 int has_dirty, rects = 0;
2605
2606 vga_hw_update();
2607
2608 if (vnc_trylock_display(vd)) {
2609 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2610 qemu_mod_timer(vd->timer, qemu_get_clock_ms(rt_clock) +
2611 vd->timer_interval);
2612 return;
2613 }
2614
2615 has_dirty = vnc_refresh_server_surface(vd);
2616 vnc_unlock_display(vd);
2617
2618 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
2619 rects += vnc_update_client(vs, has_dirty);
2620 /* vs might be free()ed here */
2621 }
2622
2623 /* vd->timer could be NULL now if the last client disconnected,
2624 * in this case don't update the timer */
2625 if (vd->timer == NULL)
2626 return;
2627
2628 if (has_dirty && rects) {
2629 vd->timer_interval /= 2;
2630 if (vd->timer_interval < VNC_REFRESH_INTERVAL_BASE)
2631 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2632 } else {
2633 vd->timer_interval += VNC_REFRESH_INTERVAL_INC;
2634 if (vd->timer_interval > VNC_REFRESH_INTERVAL_MAX)
2635 vd->timer_interval = VNC_REFRESH_INTERVAL_MAX;
2636 }
2637 qemu_mod_timer(vd->timer, qemu_get_clock_ms(rt_clock) + vd->timer_interval);
2638 }
2639
2640 static void vnc_init_timer(VncDisplay *vd)
2641 {
2642 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2643 if (vd->timer == NULL && !QTAILQ_EMPTY(&vd->clients)) {
2644 vd->timer = qemu_new_timer_ms(rt_clock, vnc_refresh, vd);
2645 vnc_dpy_resize(vd->ds);
2646 vnc_refresh(vd);
2647 }
2648 }
2649
2650 static void vnc_remove_timer(VncDisplay *vd)
2651 {
2652 if (vd->timer != NULL && QTAILQ_EMPTY(&vd->clients)) {
2653 qemu_del_timer(vd->timer);
2654 qemu_free_timer(vd->timer);
2655 vd->timer = NULL;
2656 }
2657 }
2658
2659 static void vnc_connect(VncDisplay *vd, int csock, int skipauth)
2660 {
2661 VncState *vs = g_malloc0(sizeof(VncState));
2662 int i;
2663
2664 vs->csock = csock;
2665
2666 if (skipauth) {
2667 vs->auth = VNC_AUTH_NONE;
2668 #ifdef CONFIG_VNC_TLS
2669 vs->subauth = VNC_AUTH_INVALID;
2670 #endif
2671 } else {
2672 vs->auth = vd->auth;
2673 #ifdef CONFIG_VNC_TLS
2674 vs->subauth = vd->subauth;
2675 #endif
2676 }
2677
2678 vs->lossy_rect = g_malloc0(VNC_STAT_ROWS * sizeof (*vs->lossy_rect));
2679 for (i = 0; i < VNC_STAT_ROWS; ++i) {
2680 vs->lossy_rect[i] = g_malloc0(VNC_STAT_COLS * sizeof (uint8_t));
2681 }
2682
2683 VNC_DEBUG("New client on socket %d\n", csock);
2684 dcl->idle = 0;
2685 socket_set_nonblock(vs->csock);
2686 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
2687
2688 vnc_client_cache_addr(vs);
2689 vnc_qmp_event(vs, QEVENT_VNC_CONNECTED);
2690 vnc_set_share_mode(vs, VNC_SHARE_MODE_CONNECTING);
2691
2692 vs->vd = vd;
2693 vs->ds = vd->ds;
2694 vs->last_x = -1;
2695 vs->last_y = -1;
2696
2697 vs->as.freq = 44100;
2698 vs->as.nchannels = 2;
2699 vs->as.fmt = AUD_FMT_S16;
2700 vs->as.endianness = 0;
2701
2702 #ifdef CONFIG_VNC_THREAD
2703 qemu_mutex_init(&vs->output_mutex);
2704 vs->bh = qemu_bh_new(vnc_jobs_bh, vs);
2705 #endif
2706
2707 QTAILQ_INSERT_HEAD(&vd->clients, vs, next);
2708
2709 vga_hw_update();
2710
2711 vnc_write(vs, "RFB 003.008\n", 12);
2712 vnc_flush(vs);
2713 vnc_read_when(vs, protocol_version, 12);
2714 reset_keys(vs);
2715 if (vs->vd->lock_key_sync)
2716 vs->led = qemu_add_led_event_handler(kbd_leds, vs);
2717
2718 vs->mouse_mode_notifier.notify = check_pointer_type_change;
2719 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
2720
2721 vnc_init_timer(vd);
2722
2723 /* vs might be free()ed here */
2724 }
2725
2726 static void vnc_listen_read(void *opaque)
2727 {
2728 VncDisplay *vs = opaque;
2729 struct sockaddr_in addr;
2730 socklen_t addrlen = sizeof(addr);
2731
2732 /* Catch-up */
2733 vga_hw_update();
2734
2735 int csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
2736 if (csock != -1) {
2737 vnc_connect(vs, csock, 0);
2738 }
2739 }
2740
2741 void vnc_display_init(DisplayState *ds)
2742 {
2743 VncDisplay *vs = g_malloc0(sizeof(*vs));
2744
2745 dcl = g_malloc0(sizeof(DisplayChangeListener));
2746
2747 ds->opaque = vs;
2748 dcl->idle = 1;
2749 vnc_display = vs;
2750
2751 vs->lsock = -1;
2752
2753 vs->ds = ds;
2754 QTAILQ_INIT(&vs->clients);
2755 vs->expires = TIME_MAX;
2756
2757 if (keyboard_layout)
2758 vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
2759 else
2760 vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
2761
2762 if (!vs->kbd_layout)
2763 exit(1);
2764
2765 #ifdef CONFIG_VNC_THREAD
2766 qemu_mutex_init(&vs->mutex);
2767 vnc_start_worker_thread();
2768 #endif
2769
2770 dcl->dpy_copy = vnc_dpy_copy;
2771 dcl->dpy_update = vnc_dpy_update;
2772 dcl->dpy_resize = vnc_dpy_resize;
2773 dcl->dpy_setdata = vnc_dpy_setdata;
2774 register_displaychangelistener(ds, dcl);
2775 ds->mouse_set = vnc_mouse_set;
2776 ds->cursor_define = vnc_dpy_cursor_define;
2777 }
2778
2779
2780 void vnc_display_close(DisplayState *ds)
2781 {
2782 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2783
2784 if (!vs)
2785 return;
2786 if (vs->display) {
2787 g_free(vs->display);
2788 vs->display = NULL;
2789 }
2790 if (vs->lsock != -1) {
2791 qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
2792 close(vs->lsock);
2793 vs->lsock = -1;
2794 }
2795 vs->auth = VNC_AUTH_INVALID;
2796 #ifdef CONFIG_VNC_TLS
2797 vs->subauth = VNC_AUTH_INVALID;
2798 vs->tls.x509verify = 0;
2799 #endif
2800 }
2801
2802 int vnc_display_disable_login(DisplayState *ds)
2803 {
2804 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2805
2806 if (!vs) {
2807 return -1;
2808 }
2809
2810 if (vs->password) {
2811 g_free(vs->password);
2812 }
2813
2814 vs->password = NULL;
2815 if (vs->auth == VNC_AUTH_NONE) {
2816 vs->auth = VNC_AUTH_VNC;
2817 }
2818
2819 return 0;
2820 }
2821
2822 int vnc_display_password(DisplayState *ds, const char *password)
2823 {
2824 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2825
2826 if (!vs) {
2827 return -EINVAL;
2828 }
2829
2830 if (!password) {
2831 /* This is not the intention of this interface but err on the side
2832 of being safe */
2833 return vnc_display_disable_login(ds);
2834 }
2835
2836 if (vs->password) {
2837 g_free(vs->password);
2838 vs->password = NULL;
2839 }
2840 vs->password = g_strdup(password);
2841 if (vs->auth == VNC_AUTH_NONE) {
2842 vs->auth = VNC_AUTH_VNC;
2843 }
2844
2845 return 0;
2846 }
2847
2848 int vnc_display_pw_expire(DisplayState *ds, time_t expires)
2849 {
2850 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2851
2852 vs->expires = expires;
2853 return 0;
2854 }
2855
2856 char *vnc_display_local_addr(DisplayState *ds)
2857 {
2858 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2859
2860 return vnc_socket_local_addr("%s:%s", vs->lsock);
2861 }
2862
2863 int vnc_display_open(DisplayState *ds, const char *display)
2864 {
2865 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2866 const char *options;
2867 int password = 0;
2868 int reverse = 0;
2869 #ifdef CONFIG_VNC_TLS
2870 int tls = 0, x509 = 0;
2871 #endif
2872 #ifdef CONFIG_VNC_SASL
2873 int sasl = 0;
2874 int saslErr;
2875 #endif
2876 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
2877 int acl = 0;
2878 #endif
2879 int lock_key_sync = 1;
2880
2881 if (!vnc_display)
2882 return -1;
2883 vnc_display_close(ds);
2884 if (strcmp(display, "none") == 0)
2885 return 0;
2886
2887 if (!(vs->display = strdup(display)))
2888 return -1;
2889 vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
2890
2891 options = display;
2892 while ((options = strchr(options, ','))) {
2893 options++;
2894 if (strncmp(options, "password", 8) == 0) {
2895 password = 1; /* Require password auth */
2896 } else if (strncmp(options, "reverse", 7) == 0) {
2897 reverse = 1;
2898 } else if (strncmp(options, "no-lock-key-sync", 16) == 0) {
2899 lock_key_sync = 0;
2900 #ifdef CONFIG_VNC_SASL
2901 } else if (strncmp(options, "sasl", 4) == 0) {
2902 sasl = 1; /* Require SASL auth */
2903 #endif
2904 #ifdef CONFIG_VNC_TLS
2905 } else if (strncmp(options, "tls", 3) == 0) {
2906 tls = 1; /* Require TLS */
2907 } else if (strncmp(options, "x509", 4) == 0) {
2908 char *start, *end;
2909 x509 = 1; /* Require x509 certificates */
2910 if (strncmp(options, "x509verify", 10) == 0)
2911 vs->tls.x509verify = 1; /* ...and verify client certs */
2912
2913 /* Now check for 'x509=/some/path' postfix
2914 * and use that to setup x509 certificate/key paths */
2915 start = strchr(options, '=');
2916 end = strchr(options, ',');
2917 if (start && (!end || (start < end))) {
2918 int len = end ? end-(start+1) : strlen(start+1);
2919 char *path = g_strndup(start + 1, len);
2920
2921 VNC_DEBUG("Trying certificate path '%s'\n", path);
2922 if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
2923 fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
2924 g_free(path);
2925 g_free(vs->display);
2926 vs->display = NULL;
2927 return -1;
2928 }
2929 g_free(path);
2930 } else {
2931 fprintf(stderr, "No certificate path provided\n");
2932 g_free(vs->display);
2933 vs->display = NULL;
2934 return -1;
2935 }
2936 #endif
2937 #if defined(CONFIG_VNC_TLS) || defined(CONFIG_VNC_SASL)
2938 } else if (strncmp(options, "acl", 3) == 0) {
2939 acl = 1;
2940 #endif
2941 } else if (strncmp(options, "lossy", 5) == 0) {
2942 vs->lossy = true;
2943 } else if (strncmp(options, "non-adapative", 13) == 0) {
2944 vs->non_adaptive = true;
2945 } else if (strncmp(options, "share=", 6) == 0) {
2946 if (strncmp(options+6, "ignore", 6) == 0) {
2947 vs->share_policy = VNC_SHARE_POLICY_IGNORE;
2948 } else if (strncmp(options+6, "allow-exclusive", 15) == 0) {
2949 vs->share_policy = VNC_SHARE_POLICY_ALLOW_EXCLUSIVE;
2950 } else if (strncmp(options+6, "force-shared", 12) == 0) {
2951 vs->share_policy = VNC_SHARE_POLICY_FORCE_SHARED;
2952 } else {
2953 fprintf(stderr, "unknown vnc share= option\n");
2954 g_free(vs->display);
2955 vs->display = NULL;
2956 return -1;
2957 }
2958 }
2959 }
2960
2961 #ifdef CONFIG_VNC_TLS
2962 if (acl && x509 && vs->tls.x509verify) {
2963 if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
2964 fprintf(stderr, "Failed to create x509 dname ACL\n");
2965 exit(1);
2966 }
2967 }
2968 #endif
2969 #ifdef CONFIG_VNC_SASL
2970 if (acl && sasl) {
2971 if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
2972 fprintf(stderr, "Failed to create username ACL\n");
2973 exit(1);
2974 }
2975 }
2976 #endif
2977
2978 /*
2979 * Combinations we support here:
2980 *
2981 * - no-auth (clear text, no auth)
2982 * - password (clear text, weak auth)
2983 * - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI)
2984 * - tls (encrypt, weak anonymous creds, no auth)
2985 * - tls + password (encrypt, weak anonymous creds, weak auth)
2986 * - tls + sasl (encrypt, weak anonymous creds, good auth)
2987 * - tls + x509 (encrypt, good x509 creds, no auth)
2988 * - tls + x509 + password (encrypt, good x509 creds, weak auth)
2989 * - tls + x509 + sasl (encrypt, good x509 creds, good auth)
2990 *
2991 * NB1. TLS is a stackable auth scheme.
2992 * NB2. the x509 schemes have option to validate a client cert dname
2993 */
2994 if (password) {
2995 #ifdef CONFIG_VNC_TLS
2996 if (tls) {
2997 vs->auth = VNC_AUTH_VENCRYPT;
2998 if (x509) {
2999 VNC_DEBUG("Initializing VNC server with x509 password auth\n");
3000 vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
3001 } else {
3002 VNC_DEBUG("Initializing VNC server with TLS password auth\n");
3003 vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
3004 }
3005 } else {
3006 #endif /* CONFIG_VNC_TLS */
3007 VNC_DEBUG("Initializing VNC server with password auth\n");
3008 vs->auth = VNC_AUTH_VNC;
3009 #ifdef CONFIG_VNC_TLS
3010 vs->subauth = VNC_AUTH_INVALID;
3011 }
3012 #endif /* CONFIG_VNC_TLS */
3013 #ifdef CONFIG_VNC_SASL
3014 } else if (sasl) {
3015 #ifdef CONFIG_VNC_TLS
3016 if (tls) {
3017 vs->auth = VNC_AUTH_VENCRYPT;
3018 if (x509) {
3019 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
3020 vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
3021 } else {
3022 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
3023 vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
3024 }
3025 } else {
3026 #endif /* CONFIG_VNC_TLS */
3027 VNC_DEBUG("Initializing VNC server with SASL auth\n");
3028 vs->auth = VNC_AUTH_SASL;
3029 #ifdef CONFIG_VNC_TLS
3030 vs->subauth = VNC_AUTH_INVALID;
3031 }
3032 #endif /* CONFIG_VNC_TLS */
3033 #endif /* CONFIG_VNC_SASL */
3034 } else {
3035 #ifdef CONFIG_VNC_TLS
3036 if (tls) {
3037 vs->auth = VNC_AUTH_VENCRYPT;
3038 if (x509) {
3039 VNC_DEBUG("Initializing VNC server with x509 no auth\n");
3040 vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
3041 } else {
3042 VNC_DEBUG("Initializing VNC server with TLS no auth\n");
3043 vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
3044 }
3045 } else {
3046 #endif
3047 VNC_DEBUG("Initializing VNC server with no auth\n");
3048 vs->auth = VNC_AUTH_NONE;
3049 #ifdef CONFIG_VNC_TLS
3050 vs->subauth = VNC_AUTH_INVALID;
3051 }
3052 #endif
3053 }
3054
3055 #ifdef CONFIG_VNC_SASL
3056 if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
3057 fprintf(stderr, "Failed to initialize SASL auth %s",
3058 sasl_errstring(saslErr, NULL, NULL));
3059 g_free(vs->display);
3060 vs->display = NULL;
3061 return -1;
3062 }
3063 #endif
3064 vs->lock_key_sync = lock_key_sync;
3065
3066 if (reverse) {
3067 /* connect to viewer */
3068 if (strncmp(display, "unix:", 5) == 0)
3069 vs->lsock = unix_connect(display+5);
3070 else
3071 vs->lsock = inet_connect(display, SOCK_STREAM);
3072 if (-1 == vs->lsock) {
3073 g_free(vs->display);
3074 vs->display = NULL;
3075 return -1;
3076 } else {
3077 int csock = vs->lsock;
3078 vs->lsock = -1;
3079 vnc_connect(vs, csock, 0);
3080 }
3081 return 0;
3082
3083 } else {
3084 /* listen for connects */
3085 char *dpy;
3086 dpy = g_malloc(256);
3087 if (strncmp(display, "unix:", 5) == 0) {
3088 pstrcpy(dpy, 256, "unix:");
3089 vs->lsock = unix_listen(display+5, dpy+5, 256-5);
3090 } else {
3091 vs->lsock = inet_listen(display, dpy, 256, SOCK_STREAM, 5900);
3092 }
3093 if (-1 == vs->lsock) {
3094 g_free(dpy);
3095 return -1;
3096 } else {
3097 g_free(vs->display);
3098 vs->display = dpy;
3099 }
3100 }
3101 return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
3102 }
3103
3104 void vnc_display_add_client(DisplayState *ds, int csock, int skipauth)
3105 {
3106 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
3107
3108 return vnc_connect(vs, csock, skipauth);
3109 }
QEMU Monitor Protocol