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[qemu/lumag.git] / vnc.c
blob58eac73f940595e528fc9ae518e0674eccae8044
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 "sysemu.h"
29 #include "qemu_socket.h"
30 #include "qemu-timer.h"
31 #include "acl.h"
32 #include "qemu-objects.h"
33
34 #define VNC_REFRESH_INTERVAL_BASE 30
35 #define VNC_REFRESH_INTERVAL_INC 50
36 #define VNC_REFRESH_INTERVAL_MAX 2000
37
38 #include "vnc_keysym.h"
39 #include "d3des.h"
40
41 #define count_bits(c, v) { \
42 for (c = 0; v; v >>= 1) \
43 { \
44 c += v & 1; \
45 } \
46 }
47
48
49 static VncDisplay *vnc_display; /* needed for info vnc */
50 static DisplayChangeListener *dcl;
51
52 static char *addr_to_string(const char *format,
53 struct sockaddr_storage *sa,
54 socklen_t salen) {
55 char *addr;
56 char host[NI_MAXHOST];
57 char serv[NI_MAXSERV];
58 int err;
59 size_t addrlen;
60
61 if ((err = getnameinfo((struct sockaddr *)sa, salen,
62 host, sizeof(host),
63 serv, sizeof(serv),
64 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
65 VNC_DEBUG("Cannot resolve address %d: %s\n",
66 err, gai_strerror(err));
67 return NULL;
68 }
69
70 /* Enough for the existing format + the 2 vars we're
71 * substituting in. */
72 addrlen = strlen(format) + strlen(host) + strlen(serv);
73 addr = qemu_malloc(addrlen + 1);
74 snprintf(addr, addrlen, format, host, serv);
75 addr[addrlen] = '\0';
76
77 return addr;
78 }
79
80
81 char *vnc_socket_local_addr(const char *format, int fd) {
82 struct sockaddr_storage sa;
83 socklen_t salen;
84
85 salen = sizeof(sa);
86 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0)
87 return NULL;
88
89 return addr_to_string(format, &sa, salen);
90 }
91
92 char *vnc_socket_remote_addr(const char *format, int fd) {
93 struct sockaddr_storage sa;
94 socklen_t salen;
95
96 salen = sizeof(sa);
97 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0)
98 return NULL;
99
100 return addr_to_string(format, &sa, salen);
101 }
102
103 static int put_addr_qdict(QDict *qdict, struct sockaddr_storage *sa,
104 socklen_t salen)
105 {
106 char host[NI_MAXHOST];
107 char serv[NI_MAXSERV];
108 int err;
109
110 if ((err = getnameinfo((struct sockaddr *)sa, salen,
111 host, sizeof(host),
112 serv, sizeof(serv),
113 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
114 VNC_DEBUG("Cannot resolve address %d: %s\n",
115 err, gai_strerror(err));
116 return -1;
117 }
118
119 qdict_put(qdict, "host", qstring_from_str(host));
120 qdict_put(qdict, "service", qstring_from_str(serv));
121
122 return 0;
123 }
124
125 static int vnc_qdict_local_addr(QDict *qdict, int fd)
126 {
127 struct sockaddr_storage sa;
128 socklen_t salen;
129
130 salen = sizeof(sa);
131 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
132 return -1;
133 }
134
135 return put_addr_qdict(qdict, &sa, salen);
136 }
137
138 static int vnc_qdict_remote_addr(QDict *qdict, int fd)
139 {
140 struct sockaddr_storage sa;
141 socklen_t salen;
142
143 salen = sizeof(sa);
144 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
145 return -1;
146 }
147
148 return put_addr_qdict(qdict, &sa, salen);
149 }
150
151 static const char *vnc_auth_name(VncDisplay *vd) {
152 switch (vd->auth) {
153 case VNC_AUTH_INVALID:
154 return "invalid";
155 case VNC_AUTH_NONE:
156 return "none";
157 case VNC_AUTH_VNC:
158 return "vnc";
159 case VNC_AUTH_RA2:
160 return "ra2";
161 case VNC_AUTH_RA2NE:
162 return "ra2ne";
163 case VNC_AUTH_TIGHT:
164 return "tight";
165 case VNC_AUTH_ULTRA:
166 return "ultra";
167 case VNC_AUTH_TLS:
168 return "tls";
169 case VNC_AUTH_VENCRYPT:
170 #ifdef CONFIG_VNC_TLS
171 switch (vd->subauth) {
172 case VNC_AUTH_VENCRYPT_PLAIN:
173 return "vencrypt+plain";
174 case VNC_AUTH_VENCRYPT_TLSNONE:
175 return "vencrypt+tls+none";
176 case VNC_AUTH_VENCRYPT_TLSVNC:
177 return "vencrypt+tls+vnc";
178 case VNC_AUTH_VENCRYPT_TLSPLAIN:
179 return "vencrypt+tls+plain";
180 case VNC_AUTH_VENCRYPT_X509NONE:
181 return "vencrypt+x509+none";
182 case VNC_AUTH_VENCRYPT_X509VNC:
183 return "vencrypt+x509+vnc";
184 case VNC_AUTH_VENCRYPT_X509PLAIN:
185 return "vencrypt+x509+plain";
186 case VNC_AUTH_VENCRYPT_TLSSASL:
187 return "vencrypt+tls+sasl";
188 case VNC_AUTH_VENCRYPT_X509SASL:
189 return "vencrypt+x509+sasl";
190 default:
191 return "vencrypt";
192 }
193 #else
194 return "vencrypt";
195 #endif
196 case VNC_AUTH_SASL:
197 return "sasl";
198 }
199 return "unknown";
200 }
201
202 static QDict *do_info_vnc_client(Monitor *mon, VncState *client)
203 {
204 QDict *qdict;
205
206 qdict = qdict_new();
207 if (vnc_qdict_remote_addr(qdict, client->csock) < 0) {
208 QDECREF(qdict);
209 return NULL;
210 }
211
212 #ifdef CONFIG_VNC_TLS
213 if (client->tls.session &&
214 client->tls.dname) {
215 qdict_put(qdict, "x509_dname", qstring_from_str(client->tls.dname));
216 }
217 #endif
218 #ifdef CONFIG_VNC_SASL
219 if (client->sasl.conn &&
220 client->sasl.username) {
221 qdict_put(qdict, "username", qstring_from_str(client->sasl.username));
222 }
223 #endif
224
225 return qdict;
226 }
227
228 static void info_vnc_iter(QObject *obj, void *opaque)
229 {
230 QDict *client;
231 Monitor *mon = opaque;
232
233 client = qobject_to_qdict(obj);
234 monitor_printf(mon, "Client:\n");
235 monitor_printf(mon, " address: %s:%s\n",
236 qdict_get_str(client, "host"),
237 qdict_get_str(client, "service"));
238
239 #ifdef CONFIG_VNC_TLS
240 monitor_printf(mon, " x509_dname: %s\n",
241 qdict_haskey(client, "x509_dname") ?
242 qdict_get_str(client, "x509_dname") : "none");
243 #endif
244 #ifdef CONFIG_VNC_SASL
245 monitor_printf(mon, " username: %s\n",
246 qdict_haskey(client, "username") ?
247 qdict_get_str(client, "username") : "none");
248 #endif
249 }
250
251 void do_info_vnc_print(Monitor *mon, const QObject *data)
252 {
253 QDict *server;
254 QList *clients;
255
256 server = qobject_to_qdict(data);
257 if (strcmp(qdict_get_str(server, "status"), "disabled") == 0) {
258 monitor_printf(mon, "Server: disabled\n");
259 return;
260 }
261
262 monitor_printf(mon, "Server:\n");
263 monitor_printf(mon, " address: %s:%s\n",
264 qdict_get_str(server, "host"),
265 qdict_get_str(server, "service"));
266 monitor_printf(mon, " auth: %s\n",
267 qdict_haskey(server, "auth") ? qdict_get_str(server, "auth") : "none");
268
269 clients = qdict_get_qlist(server, "clients");
270 if (qlist_empty(clients)) {
271 monitor_printf(mon, "Client: none\n");
272 } else {
273 qlist_iter(clients, info_vnc_iter, mon);
274 }
275 }
276
277 /**
278 * do_info_vnc(): Show VNC server information
279 *
280 * Return a QDict with server information. Connected clients are returned
281 * as a QList of QDicts.
282 *
283 * The main QDict contains the following:
284 *
285 * - "status": "disabled" or "enabled"
286 * - "host": server's IP address
287 * - "service": server's port number
288 * - "auth": authentication method (optional)
289 * - "clients": a QList of all connected clients
290 *
291 * Clients are described by a QDict, with the following information:
292 *
293 * - "host": client's IP address
294 * - "service": client's port number
295 * - "x509_dname": TLS dname (optional)
296 * - "username": SASL username (optional)
297 *
298 * Example:
299 *
300 * { "status": "enabled", "host": "0.0.0.0", "service": "50402", "auth": "vnc",
301 * "clients": [ { "host": "127.0.0.1", "service": "50401" } ] }
302 */
303 void do_info_vnc(Monitor *mon, QObject **ret_data)
304 {
305 if (vnc_display == NULL || vnc_display->display == NULL) {
306 *ret_data = qobject_from_jsonf("{ 'status': 'disabled' }");
307 } else {
308 QDict *qdict;
309 QList *clist;
310
311 clist = qlist_new();
312 if (vnc_display->clients) {
313 VncState *client = vnc_display->clients;
314 while (client) {
315 qdict = do_info_vnc_client(mon, client);
316 if (qdict)
317 qlist_append(clist, qdict);
318 client = client->next;
319 }
320 }
321
322 *ret_data = qobject_from_jsonf("{ 'status': 'enabled', 'clients': %p }",
323 QOBJECT(clist));
324 assert(*ret_data != NULL);
325
326 qdict = qobject_to_qdict(*ret_data);
327
328 if (vnc_display->auth != VNC_AUTH_NONE) {
329 qdict_put(qdict, "auth",
330 qstring_from_str(vnc_auth_name(vnc_display)));
331 }
332
333 if (vnc_qdict_local_addr(qdict, vnc_display->lsock) < 0) {
334 qobject_decref(*ret_data);
335 *ret_data = NULL;
336 }
337 }
338 }
339
340 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
341 return (vs->features & (1 << feature));
342 }
343
344 /* TODO
345 1) Get the queue working for IO.
346 2) there is some weirdness when using the -S option (the screen is grey
347 and not totally invalidated
348 3) resolutions > 1024
349 */
350
351 static int vnc_update_client(VncState *vs, int has_dirty);
352 static void vnc_disconnect_start(VncState *vs);
353 static void vnc_disconnect_finish(VncState *vs);
354 static void vnc_init_timer(VncDisplay *vd);
355 static void vnc_remove_timer(VncDisplay *vd);
356
357 static void vnc_colordepth(VncState *vs);
358 static void framebuffer_update_request(VncState *vs, int incremental,
359 int x_position, int y_position,
360 int w, int h);
361 static void vnc_refresh(void *opaque);
362 static int vnc_refresh_server_surface(VncDisplay *vd);
363
364 static inline void vnc_set_bit(uint32_t *d, int k)
365 {
366 d[k >> 5] |= 1 << (k & 0x1f);
367 }
368
369 static inline void vnc_clear_bit(uint32_t *d, int k)
370 {
371 d[k >> 5] &= ~(1 << (k & 0x1f));
372 }
373
374 static inline void vnc_set_bits(uint32_t *d, int n, int nb_words)
375 {
376 int j;
377
378 j = 0;
379 while (n >= 32) {
380 d[j++] = -1;
381 n -= 32;
382 }
383 if (n > 0)
384 d[j++] = (1 << n) - 1;
385 while (j < nb_words)
386 d[j++] = 0;
387 }
388
389 static inline int vnc_get_bit(const uint32_t *d, int k)
390 {
391 return (d[k >> 5] >> (k & 0x1f)) & 1;
392 }
393
394 static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2,
395 int nb_words)
396 {
397 int i;
398 for(i = 0; i < nb_words; i++) {
399 if ((d1[i] & d2[i]) != 0)
400 return 1;
401 }
402 return 0;
403 }
404
405 static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h)
406 {
407 int i;
408 VncDisplay *vd = ds->opaque;
409 struct VncSurface *s = &vd->guest;
410
411 h += y;
412
413 /* round x down to ensure the loop only spans one 16-pixel block per,
414 iteration. otherwise, if (x % 16) != 0, the last iteration may span
415 two 16-pixel blocks but we only mark the first as dirty
416 */
417 w += (x % 16);
418 x -= (x % 16);
419
420 x = MIN(x, s->ds->width);
421 y = MIN(y, s->ds->height);
422 w = MIN(x + w, s->ds->width) - x;
423 h = MIN(h, s->ds->height);
424
425 for (; y < h; y++)
426 for (i = 0; i < w; i += 16)
427 vnc_set_bit(s->dirty[y], (x + i) / 16);
428 }
429
430 static void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
431 int32_t encoding)
432 {
433 vnc_write_u16(vs, x);
434 vnc_write_u16(vs, y);
435 vnc_write_u16(vs, w);
436 vnc_write_u16(vs, h);
437
438 vnc_write_s32(vs, encoding);
439 }
440
441 void buffer_reserve(Buffer *buffer, size_t len)
442 {
443 if ((buffer->capacity - buffer->offset) < len) {
444 buffer->capacity += (len + 1024);
445 buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity);
446 if (buffer->buffer == NULL) {
447 fprintf(stderr, "vnc: out of memory\n");
448 exit(1);
449 }
450 }
451 }
452
453 int buffer_empty(Buffer *buffer)
454 {
455 return buffer->offset == 0;
456 }
457
458 uint8_t *buffer_end(Buffer *buffer)
459 {
460 return buffer->buffer + buffer->offset;
461 }
462
463 void buffer_reset(Buffer *buffer)
464 {
465 buffer->offset = 0;
466 }
467
468 void buffer_append(Buffer *buffer, const void *data, size_t len)
469 {
470 memcpy(buffer->buffer + buffer->offset, data, len);
471 buffer->offset += len;
472 }
473
474 static void vnc_dpy_resize(DisplayState *ds)
475 {
476 int size_changed;
477 VncDisplay *vd = ds->opaque;
478 VncState *vs = vd->clients;
479
480 /* server surface */
481 if (!vd->server)
482 vd->server = qemu_mallocz(sizeof(*vd->server));
483 if (vd->server->data)
484 qemu_free(vd->server->data);
485 *(vd->server) = *(ds->surface);
486 vd->server->data = qemu_mallocz(vd->server->linesize *
487 vd->server->height);
488
489 /* guest surface */
490 if (!vd->guest.ds)
491 vd->guest.ds = qemu_mallocz(sizeof(*vd->guest.ds));
492 if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel)
493 console_color_init(ds);
494 size_changed = ds_get_width(ds) != vd->guest.ds->width ||
495 ds_get_height(ds) != vd->guest.ds->height;
496 *(vd->guest.ds) = *(ds->surface);
497 memset(vd->guest.dirty, 0xFF, sizeof(vd->guest.dirty));
498
499 while (vs != NULL) {
500 vnc_colordepth(vs);
501 if (size_changed) {
502 if (vs->csock != -1 && vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
503 vnc_write_u8(vs, 0); /* msg id */
504 vnc_write_u8(vs, 0);
505 vnc_write_u16(vs, 1); /* number of rects */
506 vnc_framebuffer_update(vs, 0, 0, ds_get_width(ds), ds_get_height(ds),
507 VNC_ENCODING_DESKTOPRESIZE);
508 vnc_flush(vs);
509 }
510 }
511 memset(vs->dirty, 0xFF, sizeof(vs->dirty));
512 vs = vs->next;
513 }
514 }
515
516 /* fastest code */
517 static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
518 {
519 vnc_write(vs, pixels, size);
520 }
521
522 /* slowest but generic code. */
523 static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
524 {
525 uint8_t r, g, b;
526 VncDisplay *vd = vs->vd;
527
528 r = ((((v & vd->server->pf.rmask) >> vd->server->pf.rshift) << vs->clientds.pf.rbits) >>
529 vd->server->pf.rbits);
530 g = ((((v & vd->server->pf.gmask) >> vd->server->pf.gshift) << vs->clientds.pf.gbits) >>
531 vd->server->pf.gbits);
532 b = ((((v & vd->server->pf.bmask) >> vd->server->pf.bshift) << vs->clientds.pf.bbits) >>
533 vd->server->pf.bbits);
534 v = (r << vs->clientds.pf.rshift) |
535 (g << vs->clientds.pf.gshift) |
536 (b << vs->clientds.pf.bshift);
537 switch(vs->clientds.pf.bytes_per_pixel) {
538 case 1:
539 buf[0] = v;
540 break;
541 case 2:
542 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
543 buf[0] = v >> 8;
544 buf[1] = v;
545 } else {
546 buf[1] = v >> 8;
547 buf[0] = v;
548 }
549 break;
550 default:
551 case 4:
552 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
553 buf[0] = v >> 24;
554 buf[1] = v >> 16;
555 buf[2] = v >> 8;
556 buf[3] = v;
557 } else {
558 buf[3] = v >> 24;
559 buf[2] = v >> 16;
560 buf[1] = v >> 8;
561 buf[0] = v;
562 }
563 break;
564 }
565 }
566
567 static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size)
568 {
569 uint8_t buf[4];
570 VncDisplay *vd = vs->vd;
571
572 if (vd->server->pf.bytes_per_pixel == 4) {
573 uint32_t *pixels = pixels1;
574 int n, i;
575 n = size >> 2;
576 for(i = 0; i < n; i++) {
577 vnc_convert_pixel(vs, buf, pixels[i]);
578 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
579 }
580 } else if (vd->server->pf.bytes_per_pixel == 2) {
581 uint16_t *pixels = pixels1;
582 int n, i;
583 n = size >> 1;
584 for(i = 0; i < n; i++) {
585 vnc_convert_pixel(vs, buf, pixels[i]);
586 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
587 }
588 } else if (vd->server->pf.bytes_per_pixel == 1) {
589 uint8_t *pixels = pixels1;
590 int n, i;
591 n = size;
592 for(i = 0; i < n; i++) {
593 vnc_convert_pixel(vs, buf, pixels[i]);
594 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
595 }
596 } else {
597 fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
598 }
599 }
600
601 static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h)
602 {
603 int i;
604 uint8_t *row;
605 VncDisplay *vd = vs->vd;
606
607 row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
608 for (i = 0; i < h; i++) {
609 vs->write_pixels(vs, row, w * ds_get_bytes_per_pixel(vs->ds));
610 row += ds_get_linesize(vs->ds);
611 }
612 }
613
614 static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
615 {
616 ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
617 ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
618 }
619
620 #define BPP 8
621 #include "vnchextile.h"
622 #undef BPP
623
624 #define BPP 16
625 #include "vnchextile.h"
626 #undef BPP
627
628 #define BPP 32
629 #include "vnchextile.h"
630 #undef BPP
631
632 #define GENERIC
633 #define BPP 8
634 #include "vnchextile.h"
635 #undef BPP
636 #undef GENERIC
637
638 #define GENERIC
639 #define BPP 16
640 #include "vnchextile.h"
641 #undef BPP
642 #undef GENERIC
643
644 #define GENERIC
645 #define BPP 32
646 #include "vnchextile.h"
647 #undef BPP
648 #undef GENERIC
649
650 static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h)
651 {
652 int i, j;
653 int has_fg, has_bg;
654 uint8_t *last_fg, *last_bg;
655 VncDisplay *vd = vs->vd;
656
657 last_fg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
658 last_bg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
659 has_fg = has_bg = 0;
660 for (j = y; j < (y + h); j += 16) {
661 for (i = x; i < (x + w); i += 16) {
662 vs->send_hextile_tile(vs, i, j,
663 MIN(16, x + w - i), MIN(16, y + h - j),
664 last_bg, last_fg, &has_bg, &has_fg);
665 }
666 }
667 free(last_fg);
668 free(last_bg);
669
670 }
671
672 #define ZALLOC_ALIGNMENT 16
673
674 static void *zalloc(void *x, unsigned items, unsigned size)
675 {
676 void *p;
677
678 size *= items;
679 size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
680
681 p = qemu_mallocz(size);
682
683 return (p);
684 }
685
686 static void zfree(void *x, void *addr)
687 {
688 qemu_free(addr);
689 }
690
691 static void vnc_zlib_init(VncState *vs)
692 {
693 int i;
694 for (i=0; i<(sizeof(vs->zlib_stream) / sizeof(z_stream)); i++)
695 vs->zlib_stream[i].opaque = NULL;
696 }
697
698 static void vnc_zlib_start(VncState *vs)
699 {
700 buffer_reset(&vs->zlib);
701
702 // make the output buffer be the zlib buffer, so we can compress it later
703 vs->zlib_tmp = vs->output;
704 vs->output = vs->zlib;
705 }
706
707 static int vnc_zlib_stop(VncState *vs, int stream_id)
708 {
709 z_streamp zstream = &vs->zlib_stream[stream_id];
710 int previous_out;
711
712 // switch back to normal output/zlib buffers
713 vs->zlib = vs->output;
714 vs->output = vs->zlib_tmp;
715
716 // compress the zlib buffer
717
718 // initialize the stream
719 // XXX need one stream per session
720 if (zstream->opaque != vs) {
721 int err;
722
723 VNC_DEBUG("VNC: initializing zlib stream %d\n", stream_id);
724 VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs);
725 zstream->zalloc = zalloc;
726 zstream->zfree = zfree;
727
728 err = deflateInit2(zstream, vs->tight_compression, Z_DEFLATED, MAX_WBITS,
729 MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
730
731 if (err != Z_OK) {
732 fprintf(stderr, "VNC: error initializing zlib\n");
733 return -1;
734 }
735
736 zstream->opaque = vs;
737 }
738
739 // XXX what to do if tight_compression changed in between?
740
741 // reserve memory in output buffer
742 buffer_reserve(&vs->output, vs->zlib.offset + 64);
743
744 // set pointers
745 zstream->next_in = vs->zlib.buffer;
746 zstream->avail_in = vs->zlib.offset;
747 zstream->next_out = vs->output.buffer + vs->output.offset;
748 zstream->avail_out = vs->output.capacity - vs->output.offset;
749 zstream->data_type = Z_BINARY;
750 previous_out = zstream->total_out;
751
752 // start encoding
753 if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
754 fprintf(stderr, "VNC: error during zlib compression\n");
755 return -1;
756 }
757
758 vs->output.offset = vs->output.capacity - zstream->avail_out;
759 return zstream->total_out - previous_out;
760 }
761
762 static void send_framebuffer_update_zlib(VncState *vs, int x, int y, int w, int h)
763 {
764 int old_offset, new_offset, bytes_written;
765
766 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB);
767
768 // remember where we put in the follow-up size
769 old_offset = vs->output.offset;
770 vnc_write_s32(vs, 0);
771
772 // compress the stream
773 vnc_zlib_start(vs);
774 send_framebuffer_update_raw(vs, x, y, w, h);
775 bytes_written = vnc_zlib_stop(vs, 0);
776
777 if (bytes_written == -1)
778 return;
779
780 // hack in the size
781 new_offset = vs->output.offset;
782 vs->output.offset = old_offset;
783 vnc_write_u32(vs, bytes_written);
784 vs->output.offset = new_offset;
785 }
786
787 static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
788 {
789 switch(vs->vnc_encoding) {
790 case VNC_ENCODING_ZLIB:
791 send_framebuffer_update_zlib(vs, x, y, w, h);
792 break;
793 case VNC_ENCODING_HEXTILE:
794 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE);
795 send_framebuffer_update_hextile(vs, x, y, w, h);
796 break;
797 default:
798 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW);
799 send_framebuffer_update_raw(vs, x, y, w, h);
800 break;
801 }
802 }
803
804 static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
805 {
806 /* send bitblit op to the vnc client */
807 vnc_write_u8(vs, 0); /* msg id */
808 vnc_write_u8(vs, 0);
809 vnc_write_u16(vs, 1); /* number of rects */
810 vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT);
811 vnc_write_u16(vs, src_x);
812 vnc_write_u16(vs, src_y);
813 vnc_flush(vs);
814 }
815
816 static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
817 {
818 VncDisplay *vd = ds->opaque;
819 VncState *vs, *vn;
820 uint8_t *src_row;
821 uint8_t *dst_row;
822 int i,x,y,pitch,depth,inc,w_lim,s;
823 int cmp_bytes;
824
825 vnc_refresh_server_surface(vd);
826 for (vs = vd->clients; vs != NULL; vs = vn) {
827 vn = vs->next;
828 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
829 vs->force_update = 1;
830 vnc_update_client(vs, 1);
831 /* vs might be free()ed here */
832 }
833 }
834
835 /* do bitblit op on the local surface too */
836 pitch = ds_get_linesize(vd->ds);
837 depth = ds_get_bytes_per_pixel(vd->ds);
838 src_row = vd->server->data + pitch * src_y + depth * src_x;
839 dst_row = vd->server->data + pitch * dst_y + depth * dst_x;
840 y = dst_y;
841 inc = 1;
842 if (dst_y > src_y) {
843 /* copy backwards */
844 src_row += pitch * (h-1);
845 dst_row += pitch * (h-1);
846 pitch = -pitch;
847 y = dst_y + h - 1;
848 inc = -1;
849 }
850 w_lim = w - (16 - (dst_x % 16));
851 if (w_lim < 0)
852 w_lim = w;
853 else
854 w_lim = w - (w_lim % 16);
855 for (i = 0; i < h; i++) {
856 for (x = 0; x <= w_lim;
857 x += s, src_row += cmp_bytes, dst_row += cmp_bytes) {
858 if (x == w_lim) {
859 if ((s = w - w_lim) == 0)
860 break;
861 } else if (!x) {
862 s = (16 - (dst_x % 16));
863 s = MIN(s, w_lim);
864 } else {
865 s = 16;
866 }
867 cmp_bytes = s * depth;
868 if (memcmp(src_row, dst_row, cmp_bytes) == 0)
869 continue;
870 memmove(dst_row, src_row, cmp_bytes);
871 vs = vd->clients;
872 while (vs != NULL) {
873 if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT))
874 vnc_set_bit(vs->dirty[y], ((x + dst_x) / 16));
875 vs = vs->next;
876 }
877 }
878 src_row += pitch - w * depth;
879 dst_row += pitch - w * depth;
880 y += inc;
881 }
882
883 for (vs = vd->clients; vs != NULL; vs = vs->next) {
884 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT))
885 vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h);
886 }
887 }
888
889 static int find_and_clear_dirty_height(struct VncState *vs,
890 int y, int last_x, int x)
891 {
892 int h;
893 VncDisplay *vd = vs->vd;
894
895 for (h = 1; h < (vd->server->height - y); h++) {
896 int tmp_x;
897 if (!vnc_get_bit(vs->dirty[y + h], last_x))
898 break;
899 for (tmp_x = last_x; tmp_x < x; tmp_x++)
900 vnc_clear_bit(vs->dirty[y + h], tmp_x);
901 }
902
903 return h;
904 }
905
906 static int vnc_update_client(VncState *vs, int has_dirty)
907 {
908 if (vs->need_update && vs->csock != -1) {
909 VncDisplay *vd = vs->vd;
910 int y;
911 int n_rectangles;
912 int saved_offset;
913
914 if (vs->output.offset && !vs->audio_cap && !vs->force_update)
915 /* kernel send buffers are full -> drop frames to throttle */
916 return 0;
917
918 if (!has_dirty && !vs->audio_cap && !vs->force_update)
919 return 0;
920
921 /*
922 * Send screen updates to the vnc client using the server
923 * surface and server dirty map. guest surface updates
924 * happening in parallel don't disturb us, the next pass will
925 * send them to the client.
926 */
927 n_rectangles = 0;
928 vnc_write_u8(vs, 0); /* msg id */
929 vnc_write_u8(vs, 0);
930 saved_offset = vs->output.offset;
931 vnc_write_u16(vs, 0);
932
933 for (y = 0; y < vd->server->height; y++) {
934 int x;
935 int last_x = -1;
936 for (x = 0; x < vd->server->width / 16; x++) {
937 if (vnc_get_bit(vs->dirty[y], x)) {
938 if (last_x == -1) {
939 last_x = x;
940 }
941 vnc_clear_bit(vs->dirty[y], x);
942 } else {
943 if (last_x != -1) {
944 int h = find_and_clear_dirty_height(vs, y, last_x, x);
945 send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
946 n_rectangles++;
947 }
948 last_x = -1;
949 }
950 }
951 if (last_x != -1) {
952 int h = find_and_clear_dirty_height(vs, y, last_x, x);
953 send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
954 n_rectangles++;
955 }
956 }
957 vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF;
958 vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF;
959 vnc_flush(vs);
960 vs->force_update = 0;
961 return n_rectangles;
962 }
963
964 if (vs->csock == -1)
965 vnc_disconnect_finish(vs);
966
967 return 0;
968 }
969
970 /* audio */
971 static void audio_capture_notify(void *opaque, audcnotification_e cmd)
972 {
973 VncState *vs = opaque;
974
975 switch (cmd) {
976 case AUD_CNOTIFY_DISABLE:
977 vnc_write_u8(vs, 255);
978 vnc_write_u8(vs, 1);
979 vnc_write_u16(vs, 0);
980 vnc_flush(vs);
981 break;
982
983 case AUD_CNOTIFY_ENABLE:
984 vnc_write_u8(vs, 255);
985 vnc_write_u8(vs, 1);
986 vnc_write_u16(vs, 1);
987 vnc_flush(vs);
988 break;
989 }
990 }
991
992 static void audio_capture_destroy(void *opaque)
993 {
994 }
995
996 static void audio_capture(void *opaque, void *buf, int size)
997 {
998 VncState *vs = opaque;
999
1000 vnc_write_u8(vs, 255);
1001 vnc_write_u8(vs, 1);
1002 vnc_write_u16(vs, 2);
1003 vnc_write_u32(vs, size);
1004 vnc_write(vs, buf, size);
1005 vnc_flush(vs);
1006 }
1007
1008 static void audio_add(VncState *vs)
1009 {
1010 Monitor *mon = cur_mon;
1011 struct audio_capture_ops ops;
1012
1013 if (vs->audio_cap) {
1014 monitor_printf(mon, "audio already running\n");
1015 return;
1016 }
1017
1018 ops.notify = audio_capture_notify;
1019 ops.destroy = audio_capture_destroy;
1020 ops.capture = audio_capture;
1021
1022 vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs);
1023 if (!vs->audio_cap) {
1024 monitor_printf(mon, "Failed to add audio capture\n");
1025 }
1026 }
1027
1028 static void audio_del(VncState *vs)
1029 {
1030 if (vs->audio_cap) {
1031 AUD_del_capture(vs->audio_cap, vs);
1032 vs->audio_cap = NULL;
1033 }
1034 }
1035
1036 static void vnc_disconnect_start(VncState *vs)
1037 {
1038 if (vs->csock == -1)
1039 return;
1040 qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
1041 closesocket(vs->csock);
1042 vs->csock = -1;
1043 }
1044
1045 static void vnc_disconnect_finish(VncState *vs)
1046 {
1047 if (vs->input.buffer) {
1048 qemu_free(vs->input.buffer);
1049 vs->input.buffer = NULL;
1050 }
1051 if (vs->output.buffer) {
1052 qemu_free(vs->output.buffer);
1053 vs->output.buffer = NULL;
1054 }
1055 #ifdef CONFIG_VNC_TLS
1056 vnc_tls_client_cleanup(vs);
1057 #endif /* CONFIG_VNC_TLS */
1058 #ifdef CONFIG_VNC_SASL
1059 vnc_sasl_client_cleanup(vs);
1060 #endif /* CONFIG_VNC_SASL */
1061 audio_del(vs);
1062
1063 VncState *p, *parent = NULL;
1064 for (p = vs->vd->clients; p != NULL; p = p->next) {
1065 if (p == vs) {
1066 if (parent)
1067 parent->next = p->next;
1068 else
1069 vs->vd->clients = p->next;
1070 break;
1071 }
1072 parent = p;
1073 }
1074 if (!vs->vd->clients)
1075 dcl->idle = 1;
1076
1077 vnc_remove_timer(vs->vd);
1078 qemu_free(vs);
1079 }
1080
1081 int vnc_client_io_error(VncState *vs, int ret, int last_errno)
1082 {
1083 if (ret == 0 || ret == -1) {
1084 if (ret == -1) {
1085 switch (last_errno) {
1086 case EINTR:
1087 case EAGAIN:
1088 #ifdef _WIN32
1089 case WSAEWOULDBLOCK:
1090 #endif
1091 return 0;
1092 default:
1093 break;
1094 }
1095 }
1096
1097 VNC_DEBUG("Closing down client sock: ret %d, errno %d\n",
1098 ret, ret < 0 ? last_errno : 0);
1099 vnc_disconnect_start(vs);
1100
1101 return 0;
1102 }
1103 return ret;
1104 }
1105
1106
1107 void vnc_client_error(VncState *vs)
1108 {
1109 VNC_DEBUG("Closing down client sock: protocol error\n");
1110 vnc_disconnect_start(vs);
1111 }
1112
1113
1114 /*
1115 * Called to write a chunk of data to the client socket. The data may
1116 * be the raw data, or may have already been encoded by SASL.
1117 * The data will be written either straight onto the socket, or
1118 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1119 *
1120 * NB, it is theoretically possible to have 2 layers of encryption,
1121 * both SASL, and this TLS layer. It is highly unlikely in practice
1122 * though, since SASL encryption will typically be a no-op if TLS
1123 * is active
1124 *
1125 * Returns the number of bytes written, which may be less than
1126 * the requested 'datalen' if the socket would block. Returns
1127 * -1 on error, and disconnects the client socket.
1128 */
1129 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
1130 {
1131 long ret;
1132 #ifdef CONFIG_VNC_TLS
1133 if (vs->tls.session) {
1134 ret = gnutls_write(vs->tls.session, data, datalen);
1135 if (ret < 0) {
1136 if (ret == GNUTLS_E_AGAIN)
1137 errno = EAGAIN;
1138 else
1139 errno = EIO;
1140 ret = -1;
1141 }
1142 } else
1143 #endif /* CONFIG_VNC_TLS */
1144 ret = send(vs->csock, (const void *)data, datalen, 0);
1145 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
1146 return vnc_client_io_error(vs, ret, socket_error());
1147 }
1148
1149
1150 /*
1151 * Called to write buffered data to the client socket, when not
1152 * using any SASL SSF encryption layers. Will write as much data
1153 * as possible without blocking. If all buffered data is written,
1154 * will switch the FD poll() handler back to read monitoring.
1155 *
1156 * Returns the number of bytes written, which may be less than
1157 * the buffered output data if the socket would block. Returns
1158 * -1 on error, and disconnects the client socket.
1159 */
1160 static long vnc_client_write_plain(VncState *vs)
1161 {
1162 long ret;
1163
1164 #ifdef CONFIG_VNC_SASL
1165 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n",
1166 vs->output.buffer, vs->output.capacity, vs->output.offset,
1167 vs->sasl.waitWriteSSF);
1168
1169 if (vs->sasl.conn &&
1170 vs->sasl.runSSF &&
1171 vs->sasl.waitWriteSSF) {
1172 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF);
1173 if (ret)
1174 vs->sasl.waitWriteSSF -= ret;
1175 } else
1176 #endif /* CONFIG_VNC_SASL */
1177 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset);
1178 if (!ret)
1179 return 0;
1180
1181 memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret));
1182 vs->output.offset -= ret;
1183
1184 if (vs->output.offset == 0) {
1185 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1186 }
1187
1188 return ret;
1189 }
1190
1191
1192 /*
1193 * First function called whenever there is data to be written to
1194 * the client socket. Will delegate actual work according to whether
1195 * SASL SSF layers are enabled (thus requiring encryption calls)
1196 */
1197 void vnc_client_write(void *opaque)
1198 {
1199 long ret;
1200 VncState *vs = opaque;
1201
1202 #ifdef CONFIG_VNC_SASL
1203 if (vs->sasl.conn &&
1204 vs->sasl.runSSF &&
1205 !vs->sasl.waitWriteSSF)
1206 ret = vnc_client_write_sasl(vs);
1207 else
1208 #endif /* CONFIG_VNC_SASL */
1209 ret = vnc_client_write_plain(vs);
1210 }
1211
1212 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
1213 {
1214 vs->read_handler = func;
1215 vs->read_handler_expect = expecting;
1216 }
1217
1218
1219 /*
1220 * Called to read a chunk of data from the client socket. The data may
1221 * be the raw data, or may need to be further decoded by SASL.
1222 * The data will be read either straight from to the socket, or
1223 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1224 *
1225 * NB, it is theoretically possible to have 2 layers of encryption,
1226 * both SASL, and this TLS layer. It is highly unlikely in practice
1227 * though, since SASL encryption will typically be a no-op if TLS
1228 * is active
1229 *
1230 * Returns the number of bytes read, which may be less than
1231 * the requested 'datalen' if the socket would block. Returns
1232 * -1 on error, and disconnects the client socket.
1233 */
1234 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
1235 {
1236 long ret;
1237 #ifdef CONFIG_VNC_TLS
1238 if (vs->tls.session) {
1239 ret = gnutls_read(vs->tls.session, data, datalen);
1240 if (ret < 0) {
1241 if (ret == GNUTLS_E_AGAIN)
1242 errno = EAGAIN;
1243 else
1244 errno = EIO;
1245 ret = -1;
1246 }
1247 } else
1248 #endif /* CONFIG_VNC_TLS */
1249 ret = recv(vs->csock, (void *)data, datalen, 0);
1250 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
1251 return vnc_client_io_error(vs, ret, socket_error());
1252 }
1253
1254
1255 /*
1256 * Called to read data from the client socket to the input buffer,
1257 * when not using any SASL SSF encryption layers. Will read as much
1258 * data as possible without blocking.
1259 *
1260 * Returns the number of bytes read. Returns -1 on error, and
1261 * disconnects the client socket.
1262 */
1263 static long vnc_client_read_plain(VncState *vs)
1264 {
1265 int ret;
1266 VNC_DEBUG("Read plain %p size %zd offset %zd\n",
1267 vs->input.buffer, vs->input.capacity, vs->input.offset);
1268 buffer_reserve(&vs->input, 4096);
1269 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096);
1270 if (!ret)
1271 return 0;
1272 vs->input.offset += ret;
1273 return ret;
1274 }
1275
1276
1277 /*
1278 * First function called whenever there is more data to be read from
1279 * the client socket. Will delegate actual work according to whether
1280 * SASL SSF layers are enabled (thus requiring decryption calls)
1281 */
1282 void vnc_client_read(void *opaque)
1283 {
1284 VncState *vs = opaque;
1285 long ret;
1286
1287 #ifdef CONFIG_VNC_SASL
1288 if (vs->sasl.conn && vs->sasl.runSSF)
1289 ret = vnc_client_read_sasl(vs);
1290 else
1291 #endif /* CONFIG_VNC_SASL */
1292 ret = vnc_client_read_plain(vs);
1293 if (!ret) {
1294 if (vs->csock == -1)
1295 vnc_disconnect_finish(vs);
1296 return;
1297 }
1298
1299 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
1300 size_t len = vs->read_handler_expect;
1301 int ret;
1302
1303 ret = vs->read_handler(vs, vs->input.buffer, len);
1304 if (vs->csock == -1) {
1305 vnc_disconnect_finish(vs);
1306 return;
1307 }
1308
1309 if (!ret) {
1310 memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len));
1311 vs->input.offset -= len;
1312 } else {
1313 vs->read_handler_expect = ret;
1314 }
1315 }
1316 }
1317
1318 void vnc_write(VncState *vs, const void *data, size_t len)
1319 {
1320 buffer_reserve(&vs->output, len);
1321
1322 if (vs->csock != -1 && buffer_empty(&vs->output)) {
1323 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
1324 }
1325
1326 buffer_append(&vs->output, data, len);
1327 }
1328
1329 void vnc_write_s32(VncState *vs, int32_t value)
1330 {
1331 vnc_write_u32(vs, *(uint32_t *)&value);
1332 }
1333
1334 void vnc_write_u32(VncState *vs, uint32_t value)
1335 {
1336 uint8_t buf[4];
1337
1338 buf[0] = (value >> 24) & 0xFF;
1339 buf[1] = (value >> 16) & 0xFF;
1340 buf[2] = (value >> 8) & 0xFF;
1341 buf[3] = value & 0xFF;
1342
1343 vnc_write(vs, buf, 4);
1344 }
1345
1346 void vnc_write_u16(VncState *vs, uint16_t value)
1347 {
1348 uint8_t buf[2];
1349
1350 buf[0] = (value >> 8) & 0xFF;
1351 buf[1] = value & 0xFF;
1352
1353 vnc_write(vs, buf, 2);
1354 }
1355
1356 void vnc_write_u8(VncState *vs, uint8_t value)
1357 {
1358 vnc_write(vs, (char *)&value, 1);
1359 }
1360
1361 void vnc_flush(VncState *vs)
1362 {
1363 if (vs->csock != -1 && vs->output.offset)
1364 vnc_client_write(vs);
1365 }
1366
1367 uint8_t read_u8(uint8_t *data, size_t offset)
1368 {
1369 return data[offset];
1370 }
1371
1372 uint16_t read_u16(uint8_t *data, size_t offset)
1373 {
1374 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
1375 }
1376
1377 int32_t read_s32(uint8_t *data, size_t offset)
1378 {
1379 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
1380 (data[offset + 2] << 8) | data[offset + 3]);
1381 }
1382
1383 uint32_t read_u32(uint8_t *data, size_t offset)
1384 {
1385 return ((data[offset] << 24) | (data[offset + 1] << 16) |
1386 (data[offset + 2] << 8) | data[offset + 3]);
1387 }
1388
1389 static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
1390 {
1391 }
1392
1393 static void check_pointer_type_change(VncState *vs, int absolute)
1394 {
1395 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) {
1396 vnc_write_u8(vs, 0);
1397 vnc_write_u8(vs, 0);
1398 vnc_write_u16(vs, 1);
1399 vnc_framebuffer_update(vs, absolute, 0,
1400 ds_get_width(vs->ds), ds_get_height(vs->ds),
1401 VNC_ENCODING_POINTER_TYPE_CHANGE);
1402 vnc_flush(vs);
1403 }
1404 vs->absolute = absolute;
1405 }
1406
1407 static void pointer_event(VncState *vs, int button_mask, int x, int y)
1408 {
1409 int buttons = 0;
1410 int dz = 0;
1411
1412 if (button_mask & 0x01)
1413 buttons |= MOUSE_EVENT_LBUTTON;
1414 if (button_mask & 0x02)
1415 buttons |= MOUSE_EVENT_MBUTTON;
1416 if (button_mask & 0x04)
1417 buttons |= MOUSE_EVENT_RBUTTON;
1418 if (button_mask & 0x08)
1419 dz = -1;
1420 if (button_mask & 0x10)
1421 dz = 1;
1422
1423 if (vs->absolute) {
1424 kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1),
1425 y * 0x7FFF / (ds_get_height(vs->ds) - 1),
1426 dz, buttons);
1427 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
1428 x -= 0x7FFF;
1429 y -= 0x7FFF;
1430
1431 kbd_mouse_event(x, y, dz, buttons);
1432 } else {
1433 if (vs->last_x != -1)
1434 kbd_mouse_event(x - vs->last_x,
1435 y - vs->last_y,
1436 dz, buttons);
1437 vs->last_x = x;
1438 vs->last_y = y;
1439 }
1440
1441 check_pointer_type_change(vs, kbd_mouse_is_absolute());
1442 }
1443
1444 static void reset_keys(VncState *vs)
1445 {
1446 int i;
1447 for(i = 0; i < 256; i++) {
1448 if (vs->modifiers_state[i]) {
1449 if (i & 0x80)
1450 kbd_put_keycode(0xe0);
1451 kbd_put_keycode(i | 0x80);
1452 vs->modifiers_state[i] = 0;
1453 }
1454 }
1455 }
1456
1457 static void press_key(VncState *vs, int keysym)
1458 {
1459 kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) & 0x7f);
1460 kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) | 0x80);
1461 }
1462
1463 static void do_key_event(VncState *vs, int down, int keycode, int sym)
1464 {
1465 /* QEMU console switch */
1466 switch(keycode) {
1467 case 0x2a: /* Left Shift */
1468 case 0x36: /* Right Shift */
1469 case 0x1d: /* Left CTRL */
1470 case 0x9d: /* Right CTRL */
1471 case 0x38: /* Left ALT */
1472 case 0xb8: /* Right ALT */
1473 if (down)
1474 vs->modifiers_state[keycode] = 1;
1475 else
1476 vs->modifiers_state[keycode] = 0;
1477 break;
1478 case 0x02 ... 0x0a: /* '1' to '9' keys */
1479 if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) {
1480 /* Reset the modifiers sent to the current console */
1481 reset_keys(vs);
1482 console_select(keycode - 0x02);
1483 return;
1484 }
1485 break;
1486 case 0x3a: /* CapsLock */
1487 case 0x45: /* NumLock */
1488 if (!down)
1489 vs->modifiers_state[keycode] ^= 1;
1490 break;
1491 }
1492
1493 if (keycode_is_keypad(vs->vd->kbd_layout, keycode)) {
1494 /* If the numlock state needs to change then simulate an additional
1495 keypress before sending this one. This will happen if the user
1496 toggles numlock away from the VNC window.
1497 */
1498 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) {
1499 if (!vs->modifiers_state[0x45]) {
1500 vs->modifiers_state[0x45] = 1;
1501 press_key(vs, 0xff7f);
1502 }
1503 } else {
1504 if (vs->modifiers_state[0x45]) {
1505 vs->modifiers_state[0x45] = 0;
1506 press_key(vs, 0xff7f);
1507 }
1508 }
1509 }
1510
1511 if ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z')) {
1512 /* If the capslock state needs to change then simulate an additional
1513 keypress before sending this one. This will happen if the user
1514 toggles capslock away from the VNC window.
1515 */
1516 int uppercase = !!(sym >= 'A' && sym <= 'Z');
1517 int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]);
1518 int capslock = !!(vs->modifiers_state[0x3a]);
1519 if (capslock) {
1520 if (uppercase == shift) {
1521 vs->modifiers_state[0x3a] = 0;
1522 press_key(vs, 0xffe5);
1523 }
1524 } else {
1525 if (uppercase != shift) {
1526 vs->modifiers_state[0x3a] = 1;
1527 press_key(vs, 0xffe5);
1528 }
1529 }
1530 }
1531
1532 if (is_graphic_console()) {
1533 if (keycode & 0x80)
1534 kbd_put_keycode(0xe0);
1535 if (down)
1536 kbd_put_keycode(keycode & 0x7f);
1537 else
1538 kbd_put_keycode(keycode | 0x80);
1539 } else {
1540 /* QEMU console emulation */
1541 if (down) {
1542 int numlock = vs->modifiers_state[0x45];
1543 switch (keycode) {
1544 case 0x2a: /* Left Shift */
1545 case 0x36: /* Right Shift */
1546 case 0x1d: /* Left CTRL */
1547 case 0x9d: /* Right CTRL */
1548 case 0x38: /* Left ALT */
1549 case 0xb8: /* Right ALT */
1550 break;
1551 case 0xc8:
1552 kbd_put_keysym(QEMU_KEY_UP);
1553 break;
1554 case 0xd0:
1555 kbd_put_keysym(QEMU_KEY_DOWN);
1556 break;
1557 case 0xcb:
1558 kbd_put_keysym(QEMU_KEY_LEFT);
1559 break;
1560 case 0xcd:
1561 kbd_put_keysym(QEMU_KEY_RIGHT);
1562 break;
1563 case 0xd3:
1564 kbd_put_keysym(QEMU_KEY_DELETE);
1565 break;
1566 case 0xc7:
1567 kbd_put_keysym(QEMU_KEY_HOME);
1568 break;
1569 case 0xcf:
1570 kbd_put_keysym(QEMU_KEY_END);
1571 break;
1572 case 0xc9:
1573 kbd_put_keysym(QEMU_KEY_PAGEUP);
1574 break;
1575 case 0xd1:
1576 kbd_put_keysym(QEMU_KEY_PAGEDOWN);
1577 break;
1578
1579 case 0x47:
1580 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME);
1581 break;
1582 case 0x48:
1583 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP);
1584 break;
1585 case 0x49:
1586 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP);
1587 break;
1588 case 0x4b:
1589 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT);
1590 break;
1591 case 0x4c:
1592 kbd_put_keysym('5');
1593 break;
1594 case 0x4d:
1595 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT);
1596 break;
1597 case 0x4f:
1598 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END);
1599 break;
1600 case 0x50:
1601 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN);
1602 break;
1603 case 0x51:
1604 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN);
1605 break;
1606 case 0x52:
1607 kbd_put_keysym('0');
1608 break;
1609 case 0x53:
1610 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE);
1611 break;
1612
1613 case 0xb5:
1614 kbd_put_keysym('/');
1615 break;
1616 case 0x37:
1617 kbd_put_keysym('*');
1618 break;
1619 case 0x4a:
1620 kbd_put_keysym('-');
1621 break;
1622 case 0x4e:
1623 kbd_put_keysym('+');
1624 break;
1625 case 0x9c:
1626 kbd_put_keysym('\n');
1627 break;
1628
1629 default:
1630 kbd_put_keysym(sym);
1631 break;
1632 }
1633 }
1634 }
1635 }
1636
1637 static void key_event(VncState *vs, int down, uint32_t sym)
1638 {
1639 int keycode;
1640 int lsym = sym;
1641
1642 if (lsym >= 'A' && lsym <= 'Z' && is_graphic_console()) {
1643 lsym = lsym - 'A' + 'a';
1644 }
1645
1646 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF);
1647 do_key_event(vs, down, keycode, sym);
1648 }
1649
1650 static void ext_key_event(VncState *vs, int down,
1651 uint32_t sym, uint16_t keycode)
1652 {
1653 /* if the user specifies a keyboard layout, always use it */
1654 if (keyboard_layout)
1655 key_event(vs, down, sym);
1656 else
1657 do_key_event(vs, down, keycode, sym);
1658 }
1659
1660 static void framebuffer_update_request(VncState *vs, int incremental,
1661 int x_position, int y_position,
1662 int w, int h)
1663 {
1664 if (x_position > ds_get_width(vs->ds))
1665 x_position = ds_get_width(vs->ds);
1666 if (y_position > ds_get_height(vs->ds))
1667 y_position = ds_get_height(vs->ds);
1668 if (x_position + w >= ds_get_width(vs->ds))
1669 w = ds_get_width(vs->ds) - x_position;
1670 if (y_position + h >= ds_get_height(vs->ds))
1671 h = ds_get_height(vs->ds) - y_position;
1672
1673 int i;
1674 vs->need_update = 1;
1675 if (!incremental) {
1676 vs->force_update = 1;
1677 for (i = 0; i < h; i++) {
1678 vnc_set_bits(vs->dirty[y_position + i],
1679 (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS);
1680 }
1681 }
1682 }
1683
1684 static void send_ext_key_event_ack(VncState *vs)
1685 {
1686 vnc_write_u8(vs, 0);
1687 vnc_write_u8(vs, 0);
1688 vnc_write_u16(vs, 1);
1689 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1690 VNC_ENCODING_EXT_KEY_EVENT);
1691 vnc_flush(vs);
1692 }
1693
1694 static void send_ext_audio_ack(VncState *vs)
1695 {
1696 vnc_write_u8(vs, 0);
1697 vnc_write_u8(vs, 0);
1698 vnc_write_u16(vs, 1);
1699 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1700 VNC_ENCODING_AUDIO);
1701 vnc_flush(vs);
1702 }
1703
1704 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
1705 {
1706 int i;
1707 unsigned int enc = 0;
1708
1709 vnc_zlib_init(vs);
1710 vs->features = 0;
1711 vs->vnc_encoding = 0;
1712 vs->tight_compression = 9;
1713 vs->tight_quality = 9;
1714 vs->absolute = -1;
1715
1716 for (i = n_encodings - 1; i >= 0; i--) {
1717 enc = encodings[i];
1718 switch (enc) {
1719 case VNC_ENCODING_RAW:
1720 vs->vnc_encoding = enc;
1721 break;
1722 case VNC_ENCODING_COPYRECT:
1723 vs->features |= VNC_FEATURE_COPYRECT_MASK;
1724 break;
1725 case VNC_ENCODING_HEXTILE:
1726 vs->features |= VNC_FEATURE_HEXTILE_MASK;
1727 vs->vnc_encoding = enc;
1728 break;
1729 case VNC_ENCODING_ZLIB:
1730 vs->features |= VNC_FEATURE_ZLIB_MASK;
1731 vs->vnc_encoding = enc;
1732 break;
1733 case VNC_ENCODING_DESKTOPRESIZE:
1734 vs->features |= VNC_FEATURE_RESIZE_MASK;
1735 break;
1736 case VNC_ENCODING_POINTER_TYPE_CHANGE:
1737 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK;
1738 break;
1739 case VNC_ENCODING_EXT_KEY_EVENT:
1740 send_ext_key_event_ack(vs);
1741 break;
1742 case VNC_ENCODING_AUDIO:
1743 send_ext_audio_ack(vs);
1744 break;
1745 case VNC_ENCODING_WMVi:
1746 vs->features |= VNC_FEATURE_WMVI_MASK;
1747 break;
1748 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9:
1749 vs->tight_compression = (enc & 0x0F);
1750 break;
1751 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9:
1752 vs->tight_quality = (enc & 0x0F);
1753 break;
1754 default:
1755 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc);
1756 break;
1757 }
1758 }
1759
1760 check_pointer_type_change(vs, kbd_mouse_is_absolute());
1761 }
1762
1763 static void set_pixel_conversion(VncState *vs)
1764 {
1765 if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
1766 (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG) &&
1767 !memcmp(&(vs->clientds.pf), &(vs->ds->surface->pf), sizeof(PixelFormat))) {
1768 vs->write_pixels = vnc_write_pixels_copy;
1769 switch (vs->ds->surface->pf.bits_per_pixel) {
1770 case 8:
1771 vs->send_hextile_tile = send_hextile_tile_8;
1772 break;
1773 case 16:
1774 vs->send_hextile_tile = send_hextile_tile_16;
1775 break;
1776 case 32:
1777 vs->send_hextile_tile = send_hextile_tile_32;
1778 break;
1779 }
1780 } else {
1781 vs->write_pixels = vnc_write_pixels_generic;
1782 switch (vs->ds->surface->pf.bits_per_pixel) {
1783 case 8:
1784 vs->send_hextile_tile = send_hextile_tile_generic_8;
1785 break;
1786 case 16:
1787 vs->send_hextile_tile = send_hextile_tile_generic_16;
1788 break;
1789 case 32:
1790 vs->send_hextile_tile = send_hextile_tile_generic_32;
1791 break;
1792 }
1793 }
1794 }
1795
1796 static void set_pixel_format(VncState *vs,
1797 int bits_per_pixel, int depth,
1798 int big_endian_flag, int true_color_flag,
1799 int red_max, int green_max, int blue_max,
1800 int red_shift, int green_shift, int blue_shift)
1801 {
1802 if (!true_color_flag) {
1803 vnc_client_error(vs);
1804 return;
1805 }
1806
1807 vs->clientds = *(vs->vd->guest.ds);
1808 vs->clientds.pf.rmax = red_max;
1809 count_bits(vs->clientds.pf.rbits, red_max);
1810 vs->clientds.pf.rshift = red_shift;
1811 vs->clientds.pf.rmask = red_max << red_shift;
1812 vs->clientds.pf.gmax = green_max;
1813 count_bits(vs->clientds.pf.gbits, green_max);
1814 vs->clientds.pf.gshift = green_shift;
1815 vs->clientds.pf.gmask = green_max << green_shift;
1816 vs->clientds.pf.bmax = blue_max;
1817 count_bits(vs->clientds.pf.bbits, blue_max);
1818 vs->clientds.pf.bshift = blue_shift;
1819 vs->clientds.pf.bmask = blue_max << blue_shift;
1820 vs->clientds.pf.bits_per_pixel = bits_per_pixel;
1821 vs->clientds.pf.bytes_per_pixel = bits_per_pixel / 8;
1822 vs->clientds.pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel;
1823 vs->clientds.flags = big_endian_flag ? QEMU_BIG_ENDIAN_FLAG : 0x00;
1824
1825 set_pixel_conversion(vs);
1826
1827 vga_hw_invalidate();
1828 vga_hw_update();
1829 }
1830
1831 static void pixel_format_message (VncState *vs) {
1832 char pad[3] = { 0, 0, 0 };
1833
1834 vnc_write_u8(vs, vs->ds->surface->pf.bits_per_pixel); /* bits-per-pixel */
1835 vnc_write_u8(vs, vs->ds->surface->pf.depth); /* depth */
1836
1837 #ifdef HOST_WORDS_BIGENDIAN
1838 vnc_write_u8(vs, 1); /* big-endian-flag */
1839 #else
1840 vnc_write_u8(vs, 0); /* big-endian-flag */
1841 #endif
1842 vnc_write_u8(vs, 1); /* true-color-flag */
1843 vnc_write_u16(vs, vs->ds->surface->pf.rmax); /* red-max */
1844 vnc_write_u16(vs, vs->ds->surface->pf.gmax); /* green-max */
1845 vnc_write_u16(vs, vs->ds->surface->pf.bmax); /* blue-max */
1846 vnc_write_u8(vs, vs->ds->surface->pf.rshift); /* red-shift */
1847 vnc_write_u8(vs, vs->ds->surface->pf.gshift); /* green-shift */
1848 vnc_write_u8(vs, vs->ds->surface->pf.bshift); /* blue-shift */
1849 if (vs->ds->surface->pf.bits_per_pixel == 32)
1850 vs->send_hextile_tile = send_hextile_tile_32;
1851 else if (vs->ds->surface->pf.bits_per_pixel == 16)
1852 vs->send_hextile_tile = send_hextile_tile_16;
1853 else if (vs->ds->surface->pf.bits_per_pixel == 8)
1854 vs->send_hextile_tile = send_hextile_tile_8;
1855 vs->clientds = *(vs->ds->surface);
1856 vs->clientds.flags &= ~QEMU_ALLOCATED_FLAG;
1857 vs->write_pixels = vnc_write_pixels_copy;
1858
1859 vnc_write(vs, pad, 3); /* padding */
1860 }
1861
1862 static void vnc_dpy_setdata(DisplayState *ds)
1863 {
1864 /* We don't have to do anything */
1865 }
1866
1867 static void vnc_colordepth(VncState *vs)
1868 {
1869 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) {
1870 /* Sending a WMVi message to notify the client*/
1871 vnc_write_u8(vs, 0); /* msg id */
1872 vnc_write_u8(vs, 0);
1873 vnc_write_u16(vs, 1); /* number of rects */
1874 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds),
1875 ds_get_height(vs->ds), VNC_ENCODING_WMVi);
1876 pixel_format_message(vs);
1877 vnc_flush(vs);
1878 } else {
1879 set_pixel_conversion(vs);
1880 }
1881 }
1882
1883 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
1884 {
1885 int i;
1886 uint16_t limit;
1887 VncDisplay *vd = vs->vd;
1888
1889 if (data[0] > 3) {
1890 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
1891 if (!qemu_timer_expired(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval))
1892 qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval);
1893 }
1894
1895 switch (data[0]) {
1896 case 0:
1897 if (len == 1)
1898 return 20;
1899
1900 set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5),
1901 read_u8(data, 6), read_u8(data, 7),
1902 read_u16(data, 8), read_u16(data, 10),
1903 read_u16(data, 12), read_u8(data, 14),
1904 read_u8(data, 15), read_u8(data, 16));
1905 break;
1906 case 2:
1907 if (len == 1)
1908 return 4;
1909
1910 if (len == 4) {
1911 limit = read_u16(data, 2);
1912 if (limit > 0)
1913 return 4 + (limit * 4);
1914 } else
1915 limit = read_u16(data, 2);
1916
1917 for (i = 0; i < limit; i++) {
1918 int32_t val = read_s32(data, 4 + (i * 4));
1919 memcpy(data + 4 + (i * 4), &val, sizeof(val));
1920 }
1921
1922 set_encodings(vs, (int32_t *)(data + 4), limit);
1923 break;
1924 case 3:
1925 if (len == 1)
1926 return 10;
1927
1928 framebuffer_update_request(vs,
1929 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4),
1930 read_u16(data, 6), read_u16(data, 8));
1931 break;
1932 case 4:
1933 if (len == 1)
1934 return 8;
1935
1936 key_event(vs, read_u8(data, 1), read_u32(data, 4));
1937 break;
1938 case 5:
1939 if (len == 1)
1940 return 6;
1941
1942 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
1943 break;
1944 case 6:
1945 if (len == 1)
1946 return 8;
1947
1948 if (len == 8) {
1949 uint32_t dlen = read_u32(data, 4);
1950 if (dlen > 0)
1951 return 8 + dlen;
1952 }
1953
1954 client_cut_text(vs, read_u32(data, 4), data + 8);
1955 break;
1956 case 255:
1957 if (len == 1)
1958 return 2;
1959
1960 switch (read_u8(data, 1)) {
1961 case 0:
1962 if (len == 2)
1963 return 12;
1964
1965 ext_key_event(vs, read_u16(data, 2),
1966 read_u32(data, 4), read_u32(data, 8));
1967 break;
1968 case 1:
1969 if (len == 2)
1970 return 4;
1971
1972 switch (read_u16 (data, 2)) {
1973 case 0:
1974 audio_add(vs);
1975 break;
1976 case 1:
1977 audio_del(vs);
1978 break;
1979 case 2:
1980 if (len == 4)
1981 return 10;
1982 switch (read_u8(data, 4)) {
1983 case 0: vs->as.fmt = AUD_FMT_U8; break;
1984 case 1: vs->as.fmt = AUD_FMT_S8; break;
1985 case 2: vs->as.fmt = AUD_FMT_U16; break;
1986 case 3: vs->as.fmt = AUD_FMT_S16; break;
1987 case 4: vs->as.fmt = AUD_FMT_U32; break;
1988 case 5: vs->as.fmt = AUD_FMT_S32; break;
1989 default:
1990 printf("Invalid audio format %d\n", read_u8(data, 4));
1991 vnc_client_error(vs);
1992 break;
1993 }
1994 vs->as.nchannels = read_u8(data, 5);
1995 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) {
1996 printf("Invalid audio channel coount %d\n",
1997 read_u8(data, 5));
1998 vnc_client_error(vs);
1999 break;
2000 }
2001 vs->as.freq = read_u32(data, 6);
2002 break;
2003 default:
2004 printf ("Invalid audio message %d\n", read_u8(data, 4));
2005 vnc_client_error(vs);
2006 break;
2007 }
2008 break;
2009
2010 default:
2011 printf("Msg: %d\n", read_u16(data, 0));
2012 vnc_client_error(vs);
2013 break;
2014 }
2015 break;
2016 default:
2017 printf("Msg: %d\n", data[0]);
2018 vnc_client_error(vs);
2019 break;
2020 }
2021
2022 vnc_read_when(vs, protocol_client_msg, 1);
2023 return 0;
2024 }
2025
2026 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
2027 {
2028 char buf[1024];
2029 int size;
2030
2031 vnc_write_u16(vs, ds_get_width(vs->ds));
2032 vnc_write_u16(vs, ds_get_height(vs->ds));
2033
2034 pixel_format_message(vs);
2035
2036 if (qemu_name)
2037 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name);
2038 else
2039 size = snprintf(buf, sizeof(buf), "QEMU");
2040
2041 vnc_write_u32(vs, size);
2042 vnc_write(vs, buf, size);
2043 vnc_flush(vs);
2044
2045 vnc_read_when(vs, protocol_client_msg, 1);
2046
2047 return 0;
2048 }
2049
2050 void start_client_init(VncState *vs)
2051 {
2052 vnc_read_when(vs, protocol_client_init, 1);
2053 }
2054
2055 static void make_challenge(VncState *vs)
2056 {
2057 int i;
2058
2059 srand(time(NULL)+getpid()+getpid()*987654+rand());
2060
2061 for (i = 0 ; i < sizeof(vs->challenge) ; i++)
2062 vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0));
2063 }
2064
2065 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
2066 {
2067 unsigned char response[VNC_AUTH_CHALLENGE_SIZE];
2068 int i, j, pwlen;
2069 unsigned char key[8];
2070
2071 if (!vs->vd->password || !vs->vd->password[0]) {
2072 VNC_DEBUG("No password configured on server");
2073 vnc_write_u32(vs, 1); /* Reject auth */
2074 if (vs->minor >= 8) {
2075 static const char err[] = "Authentication failed";
2076 vnc_write_u32(vs, sizeof(err));
2077 vnc_write(vs, err, sizeof(err));
2078 }
2079 vnc_flush(vs);
2080 vnc_client_error(vs);
2081 return 0;
2082 }
2083
2084 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
2085
2086 /* Calculate the expected challenge response */
2087 pwlen = strlen(vs->vd->password);
2088 for (i=0; i<sizeof(key); i++)
2089 key[i] = i<pwlen ? vs->vd->password[i] : 0;
2090 deskey(key, EN0);
2091 for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
2092 des(response+j, response+j);
2093
2094 /* Compare expected vs actual challenge response */
2095 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) {
2096 VNC_DEBUG("Client challenge reponse did not match\n");
2097 vnc_write_u32(vs, 1); /* Reject auth */
2098 if (vs->minor >= 8) {
2099 static const char err[] = "Authentication failed";
2100 vnc_write_u32(vs, sizeof(err));
2101 vnc_write(vs, err, sizeof(err));
2102 }
2103 vnc_flush(vs);
2104 vnc_client_error(vs);
2105 } else {
2106 VNC_DEBUG("Accepting VNC challenge response\n");
2107 vnc_write_u32(vs, 0); /* Accept auth */
2108 vnc_flush(vs);
2109
2110 start_client_init(vs);
2111 }
2112 return 0;
2113 }
2114
2115 void start_auth_vnc(VncState *vs)
2116 {
2117 make_challenge(vs);
2118 /* Send client a 'random' challenge */
2119 vnc_write(vs, vs->challenge, sizeof(vs->challenge));
2120 vnc_flush(vs);
2121
2122 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
2123 }
2124
2125
2126 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
2127 {
2128 /* We only advertise 1 auth scheme at a time, so client
2129 * must pick the one we sent. Verify this */
2130 if (data[0] != vs->vd->auth) { /* Reject auth */
2131 VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]);
2132 vnc_write_u32(vs, 1);
2133 if (vs->minor >= 8) {
2134 static const char err[] = "Authentication failed";
2135 vnc_write_u32(vs, sizeof(err));
2136 vnc_write(vs, err, sizeof(err));
2137 }
2138 vnc_client_error(vs);
2139 } else { /* Accept requested auth */
2140 VNC_DEBUG("Client requested auth %d\n", (int)data[0]);
2141 switch (vs->vd->auth) {
2142 case VNC_AUTH_NONE:
2143 VNC_DEBUG("Accept auth none\n");
2144 if (vs->minor >= 8) {
2145 vnc_write_u32(vs, 0); /* Accept auth completion */
2146 vnc_flush(vs);
2147 }
2148 start_client_init(vs);
2149 break;
2150
2151 case VNC_AUTH_VNC:
2152 VNC_DEBUG("Start VNC auth\n");
2153 start_auth_vnc(vs);
2154 break;
2155
2156 #ifdef CONFIG_VNC_TLS
2157 case VNC_AUTH_VENCRYPT:
2158 VNC_DEBUG("Accept VeNCrypt auth\n");;
2159 start_auth_vencrypt(vs);
2160 break;
2161 #endif /* CONFIG_VNC_TLS */
2162
2163 #ifdef CONFIG_VNC_SASL
2164 case VNC_AUTH_SASL:
2165 VNC_DEBUG("Accept SASL auth\n");
2166 start_auth_sasl(vs);
2167 break;
2168 #endif /* CONFIG_VNC_SASL */
2169
2170 default: /* Should not be possible, but just in case */
2171 VNC_DEBUG("Reject auth %d server code bug\n", vs->vd->auth);
2172 vnc_write_u8(vs, 1);
2173 if (vs->minor >= 8) {
2174 static const char err[] = "Authentication failed";
2175 vnc_write_u32(vs, sizeof(err));
2176 vnc_write(vs, err, sizeof(err));
2177 }
2178 vnc_client_error(vs);
2179 }
2180 }
2181 return 0;
2182 }
2183
2184 static int protocol_version(VncState *vs, uint8_t *version, size_t len)
2185 {
2186 char local[13];
2187
2188 memcpy(local, version, 12);
2189 local[12] = 0;
2190
2191 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) {
2192 VNC_DEBUG("Malformed protocol version %s\n", local);
2193 vnc_client_error(vs);
2194 return 0;
2195 }
2196 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
2197 if (vs->major != 3 ||
2198 (vs->minor != 3 &&
2199 vs->minor != 4 &&
2200 vs->minor != 5 &&
2201 vs->minor != 7 &&
2202 vs->minor != 8)) {
2203 VNC_DEBUG("Unsupported client version\n");
2204 vnc_write_u32(vs, VNC_AUTH_INVALID);
2205 vnc_flush(vs);
2206 vnc_client_error(vs);
2207 return 0;
2208 }
2209 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated
2210 * as equivalent to v3.3 by servers
2211 */
2212 if (vs->minor == 4 || vs->minor == 5)
2213 vs->minor = 3;
2214
2215 if (vs->minor == 3) {
2216 if (vs->vd->auth == VNC_AUTH_NONE) {
2217 VNC_DEBUG("Tell client auth none\n");
2218 vnc_write_u32(vs, vs->vd->auth);
2219 vnc_flush(vs);
2220 start_client_init(vs);
2221 } else if (vs->vd->auth == VNC_AUTH_VNC) {
2222 VNC_DEBUG("Tell client VNC auth\n");
2223 vnc_write_u32(vs, vs->vd->auth);
2224 vnc_flush(vs);
2225 start_auth_vnc(vs);
2226 } else {
2227 VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->vd->auth);
2228 vnc_write_u32(vs, VNC_AUTH_INVALID);
2229 vnc_flush(vs);
2230 vnc_client_error(vs);
2231 }
2232 } else {
2233 VNC_DEBUG("Telling client we support auth %d\n", vs->vd->auth);
2234 vnc_write_u8(vs, 1); /* num auth */
2235 vnc_write_u8(vs, vs->vd->auth);
2236 vnc_read_when(vs, protocol_client_auth, 1);
2237 vnc_flush(vs);
2238 }
2239
2240 return 0;
2241 }
2242
2243 static int vnc_refresh_server_surface(VncDisplay *vd)
2244 {
2245 int y;
2246 uint8_t *guest_row;
2247 uint8_t *server_row;
2248 int cmp_bytes;
2249 uint32_t width_mask[VNC_DIRTY_WORDS];
2250 VncState *vs = NULL;
2251 int has_dirty = 0;
2252
2253 /*
2254 * Walk through the guest dirty map.
2255 * Check and copy modified bits from guest to server surface.
2256 * Update server dirty map.
2257 */
2258 vnc_set_bits(width_mask, (ds_get_width(vd->ds) / 16), VNC_DIRTY_WORDS);
2259 cmp_bytes = 16 * ds_get_bytes_per_pixel(vd->ds);
2260 guest_row = vd->guest.ds->data;
2261 server_row = vd->server->data;
2262 for (y = 0; y < vd->guest.ds->height; y++) {
2263 if (vnc_and_bits(vd->guest.dirty[y], width_mask, VNC_DIRTY_WORDS)) {
2264 int x;
2265 uint8_t *guest_ptr;
2266 uint8_t *server_ptr;
2267
2268 guest_ptr = guest_row;
2269 server_ptr = server_row;
2270
2271 for (x = 0; x < vd->guest.ds->width;
2272 x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) {
2273 if (!vnc_get_bit(vd->guest.dirty[y], (x / 16)))
2274 continue;
2275 vnc_clear_bit(vd->guest.dirty[y], (x / 16));
2276 if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0)
2277 continue;
2278 memcpy(server_ptr, guest_ptr, cmp_bytes);
2279 vs = vd->clients;
2280 while (vs != NULL) {
2281 vnc_set_bit(vs->dirty[y], (x / 16));
2282 vs = vs->next;
2283 }
2284 has_dirty++;
2285 }
2286 }
2287 guest_row += ds_get_linesize(vd->ds);
2288 server_row += ds_get_linesize(vd->ds);
2289 }
2290 return has_dirty;
2291 }
2292
2293 static void vnc_refresh(void *opaque)
2294 {
2295 VncDisplay *vd = opaque;
2296 VncState *vs = NULL;
2297 int has_dirty = 0, rects = 0;
2298
2299 vga_hw_update();
2300
2301 has_dirty = vnc_refresh_server_surface(vd);
2302
2303 vs = vd->clients;
2304 while (vs != NULL) {
2305 rects += vnc_update_client(vs, has_dirty);
2306 vs = vs->next;
2307 }
2308 /* vd->timer could be NULL now if the last client disconnected,
2309 * in this case don't update the timer */
2310 if (vd->timer == NULL)
2311 return;
2312
2313 if (has_dirty && rects) {
2314 vd->timer_interval /= 2;
2315 if (vd->timer_interval < VNC_REFRESH_INTERVAL_BASE)
2316 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2317 } else {
2318 vd->timer_interval += VNC_REFRESH_INTERVAL_INC;
2319 if (vd->timer_interval > VNC_REFRESH_INTERVAL_MAX)
2320 vd->timer_interval = VNC_REFRESH_INTERVAL_MAX;
2321 }
2322 qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval);
2323 }
2324
2325 static void vnc_init_timer(VncDisplay *vd)
2326 {
2327 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2328 if (vd->timer == NULL && vd->clients != NULL) {
2329 vd->timer = qemu_new_timer(rt_clock, vnc_refresh, vd);
2330 vnc_refresh(vd);
2331 }
2332 }
2333
2334 static void vnc_remove_timer(VncDisplay *vd)
2335 {
2336 if (vd->timer != NULL && vd->clients == NULL) {
2337 qemu_del_timer(vd->timer);
2338 qemu_free_timer(vd->timer);
2339 vd->timer = NULL;
2340 }
2341 }
2342
2343 static void vnc_connect(VncDisplay *vd, int csock)
2344 {
2345 VncState *vs = qemu_mallocz(sizeof(VncState));
2346 vs->csock = csock;
2347
2348 VNC_DEBUG("New client on socket %d\n", csock);
2349 dcl->idle = 0;
2350 socket_set_nonblock(vs->csock);
2351 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
2352
2353 vs->vd = vd;
2354 vs->ds = vd->ds;
2355 vs->last_x = -1;
2356 vs->last_y = -1;
2357
2358 vs->as.freq = 44100;
2359 vs->as.nchannels = 2;
2360 vs->as.fmt = AUD_FMT_S16;
2361 vs->as.endianness = 0;
2362
2363 vs->next = vd->clients;
2364 vd->clients = vs;
2365
2366 vga_hw_update();
2367
2368 vnc_write(vs, "RFB 003.008\n", 12);
2369 vnc_flush(vs);
2370 vnc_read_when(vs, protocol_version, 12);
2371 reset_keys(vs);
2372
2373 vnc_init_timer(vd);
2374
2375 /* vs might be free()ed here */
2376 }
2377
2378 static void vnc_listen_read(void *opaque)
2379 {
2380 VncDisplay *vs = opaque;
2381 struct sockaddr_in addr;
2382 socklen_t addrlen = sizeof(addr);
2383
2384 /* Catch-up */
2385 vga_hw_update();
2386
2387 int csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
2388 if (csock != -1) {
2389 vnc_connect(vs, csock);
2390 }
2391 }
2392
2393 void vnc_display_init(DisplayState *ds)
2394 {
2395 VncDisplay *vs = qemu_mallocz(sizeof(*vs));
2396
2397 dcl = qemu_mallocz(sizeof(DisplayChangeListener));
2398
2399 ds->opaque = vs;
2400 dcl->idle = 1;
2401 vnc_display = vs;
2402
2403 vs->lsock = -1;
2404
2405 vs->ds = ds;
2406
2407 if (keyboard_layout)
2408 vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
2409 else
2410 vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
2411
2412 if (!vs->kbd_layout)
2413 exit(1);
2414
2415 dcl->dpy_copy = vnc_dpy_copy;
2416 dcl->dpy_update = vnc_dpy_update;
2417 dcl->dpy_resize = vnc_dpy_resize;
2418 dcl->dpy_setdata = vnc_dpy_setdata;
2419 register_displaychangelistener(ds, dcl);
2420 }
2421
2422
2423 void vnc_display_close(DisplayState *ds)
2424 {
2425 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2426
2427 if (!vs)
2428 return;
2429 if (vs->display) {
2430 qemu_free(vs->display);
2431 vs->display = NULL;
2432 }
2433 if (vs->lsock != -1) {
2434 qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
2435 close(vs->lsock);
2436 vs->lsock = -1;
2437 }
2438 vs->auth = VNC_AUTH_INVALID;
2439 #ifdef CONFIG_VNC_TLS
2440 vs->subauth = VNC_AUTH_INVALID;
2441 vs->tls.x509verify = 0;
2442 #endif
2443 }
2444
2445 int vnc_display_password(DisplayState *ds, const char *password)
2446 {
2447 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2448
2449 if (!vs) {
2450 return -1;
2451 }
2452
2453 if (vs->password) {
2454 qemu_free(vs->password);
2455 vs->password = NULL;
2456 }
2457 if (password && password[0]) {
2458 if (!(vs->password = qemu_strdup(password)))
2459 return -1;
2460 if (vs->auth == VNC_AUTH_NONE) {
2461 vs->auth = VNC_AUTH_VNC;
2462 }
2463 } else {
2464 vs->auth = VNC_AUTH_NONE;
2465 }
2466
2467 return 0;
2468 }
2469
2470 char *vnc_display_local_addr(DisplayState *ds)
2471 {
2472 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2473
2474 return vnc_socket_local_addr("%s:%s", vs->lsock);
2475 }
2476
2477 int vnc_display_open(DisplayState *ds, const char *display)
2478 {
2479 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2480 const char *options;
2481 int password = 0;
2482 int reverse = 0;
2483 int to_port = 0;
2484 #ifdef CONFIG_VNC_TLS
2485 int tls = 0, x509 = 0;
2486 #endif
2487 #ifdef CONFIG_VNC_SASL
2488 int sasl = 0;
2489 int saslErr;
2490 #endif
2491 int acl = 0;
2492
2493 if (!vnc_display)
2494 return -1;
2495 vnc_display_close(ds);
2496 if (strcmp(display, "none") == 0)
2497 return 0;
2498
2499 if (!(vs->display = strdup(display)))
2500 return -1;
2501
2502 options = display;
2503 while ((options = strchr(options, ','))) {
2504 options++;
2505 if (strncmp(options, "password", 8) == 0) {
2506 password = 1; /* Require password auth */
2507 } else if (strncmp(options, "reverse", 7) == 0) {
2508 reverse = 1;
2509 } else if (strncmp(options, "to=", 3) == 0) {
2510 to_port = atoi(options+3) + 5900;
2511 #ifdef CONFIG_VNC_SASL
2512 } else if (strncmp(options, "sasl", 4) == 0) {
2513 sasl = 1; /* Require SASL auth */
2514 #endif
2515 #ifdef CONFIG_VNC_TLS
2516 } else if (strncmp(options, "tls", 3) == 0) {
2517 tls = 1; /* Require TLS */
2518 } else if (strncmp(options, "x509", 4) == 0) {
2519 char *start, *end;
2520 x509 = 1; /* Require x509 certificates */
2521 if (strncmp(options, "x509verify", 10) == 0)
2522 vs->tls.x509verify = 1; /* ...and verify client certs */
2523
2524 /* Now check for 'x509=/some/path' postfix
2525 * and use that to setup x509 certificate/key paths */
2526 start = strchr(options, '=');
2527 end = strchr(options, ',');
2528 if (start && (!end || (start < end))) {
2529 int len = end ? end-(start+1) : strlen(start+1);
2530 char *path = qemu_strndup(start + 1, len);
2531
2532 VNC_DEBUG("Trying certificate path '%s'\n", path);
2533 if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
2534 fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
2535 qemu_free(path);
2536 qemu_free(vs->display);
2537 vs->display = NULL;
2538 return -1;
2539 }
2540 qemu_free(path);
2541 } else {
2542 fprintf(stderr, "No certificate path provided\n");
2543 qemu_free(vs->display);
2544 vs->display = NULL;
2545 return -1;
2546 }
2547 #endif
2548 } else if (strncmp(options, "acl", 3) == 0) {
2549 acl = 1;
2550 }
2551 }
2552
2553 #ifdef CONFIG_VNC_TLS
2554 if (acl && x509 && vs->tls.x509verify) {
2555 if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
2556 fprintf(stderr, "Failed to create x509 dname ACL\n");
2557 exit(1);
2558 }
2559 }
2560 #endif
2561 #ifdef CONFIG_VNC_SASL
2562 if (acl && sasl) {
2563 if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
2564 fprintf(stderr, "Failed to create username ACL\n");
2565 exit(1);
2566 }
2567 }
2568 #endif
2569
2570 /*
2571 * Combinations we support here:
2572 *
2573 * - no-auth (clear text, no auth)
2574 * - password (clear text, weak auth)
2575 * - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI)
2576 * - tls (encrypt, weak anonymous creds, no auth)
2577 * - tls + password (encrypt, weak anonymous creds, weak auth)
2578 * - tls + sasl (encrypt, weak anonymous creds, good auth)
2579 * - tls + x509 (encrypt, good x509 creds, no auth)
2580 * - tls + x509 + password (encrypt, good x509 creds, weak auth)
2581 * - tls + x509 + sasl (encrypt, good x509 creds, good auth)
2582 *
2583 * NB1. TLS is a stackable auth scheme.
2584 * NB2. the x509 schemes have option to validate a client cert dname
2585 */
2586 if (password) {
2587 #ifdef CONFIG_VNC_TLS
2588 if (tls) {
2589 vs->auth = VNC_AUTH_VENCRYPT;
2590 if (x509) {
2591 VNC_DEBUG("Initializing VNC server with x509 password auth\n");
2592 vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
2593 } else {
2594 VNC_DEBUG("Initializing VNC server with TLS password auth\n");
2595 vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
2596 }
2597 } else {
2598 #endif /* CONFIG_VNC_TLS */
2599 VNC_DEBUG("Initializing VNC server with password auth\n");
2600 vs->auth = VNC_AUTH_VNC;
2601 #ifdef CONFIG_VNC_TLS
2602 vs->subauth = VNC_AUTH_INVALID;
2603 }
2604 #endif /* CONFIG_VNC_TLS */
2605 #ifdef CONFIG_VNC_SASL
2606 } else if (sasl) {
2607 #ifdef CONFIG_VNC_TLS
2608 if (tls) {
2609 vs->auth = VNC_AUTH_VENCRYPT;
2610 if (x509) {
2611 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
2612 vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
2613 } else {
2614 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
2615 vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
2616 }
2617 } else {
2618 #endif /* CONFIG_VNC_TLS */
2619 VNC_DEBUG("Initializing VNC server with SASL auth\n");
2620 vs->auth = VNC_AUTH_SASL;
2621 #ifdef CONFIG_VNC_TLS
2622 vs->subauth = VNC_AUTH_INVALID;
2623 }
2624 #endif /* CONFIG_VNC_TLS */
2625 #endif /* CONFIG_VNC_SASL */
2626 } else {
2627 #ifdef CONFIG_VNC_TLS
2628 if (tls) {
2629 vs->auth = VNC_AUTH_VENCRYPT;
2630 if (x509) {
2631 VNC_DEBUG("Initializing VNC server with x509 no auth\n");
2632 vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
2633 } else {
2634 VNC_DEBUG("Initializing VNC server with TLS no auth\n");
2635 vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
2636 }
2637 } else {
2638 #endif
2639 VNC_DEBUG("Initializing VNC server with no auth\n");
2640 vs->auth = VNC_AUTH_NONE;
2641 #ifdef CONFIG_VNC_TLS
2642 vs->subauth = VNC_AUTH_INVALID;
2643 }
2644 #endif
2645 }
2646
2647 #ifdef CONFIG_VNC_SASL
2648 if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
2649 fprintf(stderr, "Failed to initialize SASL auth %s",
2650 sasl_errstring(saslErr, NULL, NULL));
2651 free(vs->display);
2652 vs->display = NULL;
2653 return -1;
2654 }
2655 #endif
2656
2657 if (reverse) {
2658 /* connect to viewer */
2659 if (strncmp(display, "unix:", 5) == 0)
2660 vs->lsock = unix_connect(display+5);
2661 else
2662 vs->lsock = inet_connect(display, SOCK_STREAM);
2663 if (-1 == vs->lsock) {
2664 free(vs->display);
2665 vs->display = NULL;
2666 return -1;
2667 } else {
2668 int csock = vs->lsock;
2669 vs->lsock = -1;
2670 vnc_connect(vs, csock);
2671 }
2672 return 0;
2673
2674 } else {
2675 /* listen for connects */
2676 char *dpy;
2677 dpy = qemu_malloc(256);
2678 if (strncmp(display, "unix:", 5) == 0) {
2679 pstrcpy(dpy, 256, "unix:");
2680 vs->lsock = unix_listen(display+5, dpy+5, 256-5);
2681 } else {
2682 vs->lsock = inet_listen(display, dpy, 256, SOCK_STREAM, 5900);
2683 }
2684 if (-1 == vs->lsock) {
2685 free(dpy);
2686 return -1;
2687 } else {
2688 free(vs->display);
2689 vs->display = dpy;
2690 }
2691 }
2692 return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
2693 }
various patches