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virtio-9p: Add P9_TSTAT support
[qemu/aliguori-queue.git] / vnc.c
blob5241a6aa69174548a1e3d763bd0cd2cec20632ab
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 qdict_put(qdict, "family",qstring_from_str(inet_strfamily(sa->ss_family)));
122
123 return 0;
124 }
125
126 static int vnc_server_addr_put(QDict *qdict, int fd)
127 {
128 struct sockaddr_storage sa;
129 socklen_t salen;
130
131 salen = sizeof(sa);
132 if (getsockname(fd, (struct sockaddr*)&sa, &salen) < 0) {
133 return -1;
134 }
135
136 return put_addr_qdict(qdict, &sa, salen);
137 }
138
139 static int vnc_qdict_remote_addr(QDict *qdict, int fd)
140 {
141 struct sockaddr_storage sa;
142 socklen_t salen;
143
144 salen = sizeof(sa);
145 if (getpeername(fd, (struct sockaddr*)&sa, &salen) < 0) {
146 return -1;
147 }
148
149 return put_addr_qdict(qdict, &sa, salen);
150 }
151
152 static const char *vnc_auth_name(VncDisplay *vd) {
153 switch (vd->auth) {
154 case VNC_AUTH_INVALID:
155 return "invalid";
156 case VNC_AUTH_NONE:
157 return "none";
158 case VNC_AUTH_VNC:
159 return "vnc";
160 case VNC_AUTH_RA2:
161 return "ra2";
162 case VNC_AUTH_RA2NE:
163 return "ra2ne";
164 case VNC_AUTH_TIGHT:
165 return "tight";
166 case VNC_AUTH_ULTRA:
167 return "ultra";
168 case VNC_AUTH_TLS:
169 return "tls";
170 case VNC_AUTH_VENCRYPT:
171 #ifdef CONFIG_VNC_TLS
172 switch (vd->subauth) {
173 case VNC_AUTH_VENCRYPT_PLAIN:
174 return "vencrypt+plain";
175 case VNC_AUTH_VENCRYPT_TLSNONE:
176 return "vencrypt+tls+none";
177 case VNC_AUTH_VENCRYPT_TLSVNC:
178 return "vencrypt+tls+vnc";
179 case VNC_AUTH_VENCRYPT_TLSPLAIN:
180 return "vencrypt+tls+plain";
181 case VNC_AUTH_VENCRYPT_X509NONE:
182 return "vencrypt+x509+none";
183 case VNC_AUTH_VENCRYPT_X509VNC:
184 return "vencrypt+x509+vnc";
185 case VNC_AUTH_VENCRYPT_X509PLAIN:
186 return "vencrypt+x509+plain";
187 case VNC_AUTH_VENCRYPT_TLSSASL:
188 return "vencrypt+tls+sasl";
189 case VNC_AUTH_VENCRYPT_X509SASL:
190 return "vencrypt+x509+sasl";
191 default:
192 return "vencrypt";
193 }
194 #else
195 return "vencrypt";
196 #endif
197 case VNC_AUTH_SASL:
198 return "sasl";
199 }
200 return "unknown";
201 }
202
203 static int vnc_server_info_put(QDict *qdict)
204 {
205 if (vnc_server_addr_put(qdict, vnc_display->lsock) < 0) {
206 return -1;
207 }
208
209 qdict_put(qdict, "auth", qstring_from_str(vnc_auth_name(vnc_display)));
210 return 0;
211 }
212
213 static void vnc_client_cache_auth(VncState *client)
214 {
215 QDict *qdict;
216
217 if (!client->info) {
218 return;
219 }
220
221 qdict = qobject_to_qdict(client->info);
222
223 #ifdef CONFIG_VNC_TLS
224 if (client->tls.session &&
225 client->tls.dname) {
226 qdict_put(qdict, "x509_dname", qstring_from_str(client->tls.dname));
227 }
228 #endif
229 #ifdef CONFIG_VNC_SASL
230 if (client->sasl.conn &&
231 client->sasl.username) {
232 qdict_put(qdict, "sasl_username",
233 qstring_from_str(client->sasl.username));
234 }
235 #endif
236 }
237
238 static void vnc_client_cache_addr(VncState *client)
239 {
240 QDict *qdict;
241
242 qdict = qdict_new();
243 if (vnc_qdict_remote_addr(qdict, client->csock) < 0) {
244 QDECREF(qdict);
245 /* XXX: how to report the error? */
246 return;
247 }
248
249 client->info = QOBJECT(qdict);
250 }
251
252 static void vnc_qmp_event(VncState *vs, MonitorEvent event)
253 {
254 QDict *server;
255 QObject *data;
256
257 if (!vs->info) {
258 return;
259 }
260
261 server = qdict_new();
262 if (vnc_server_info_put(server) < 0) {
263 QDECREF(server);
264 return;
265 }
266
267 data = qobject_from_jsonf("{ 'client': %p, 'server': %p }",
268 vs->info, QOBJECT(server));
269
270 monitor_protocol_event(event, data);
271
272 qobject_incref(vs->info);
273 qobject_decref(data);
274 }
275
276 static void info_vnc_iter(QObject *obj, void *opaque)
277 {
278 QDict *client;
279 Monitor *mon = opaque;
280
281 client = qobject_to_qdict(obj);
282 monitor_printf(mon, "Client:\n");
283 monitor_printf(mon, " address: %s:%s\n",
284 qdict_get_str(client, "host"),
285 qdict_get_str(client, "service"));
286
287 #ifdef CONFIG_VNC_TLS
288 monitor_printf(mon, " x509_dname: %s\n",
289 qdict_haskey(client, "x509_dname") ?
290 qdict_get_str(client, "x509_dname") : "none");
291 #endif
292 #ifdef CONFIG_VNC_SASL
293 monitor_printf(mon, " username: %s\n",
294 qdict_haskey(client, "sasl_username") ?
295 qdict_get_str(client, "sasl_username") : "none");
296 #endif
297 }
298
299 void do_info_vnc_print(Monitor *mon, const QObject *data)
300 {
301 QDict *server;
302 QList *clients;
303
304 server = qobject_to_qdict(data);
305 if (qdict_get_bool(server, "enabled") == 0) {
306 monitor_printf(mon, "Server: disabled\n");
307 return;
308 }
309
310 monitor_printf(mon, "Server:\n");
311 monitor_printf(mon, " address: %s:%s\n",
312 qdict_get_str(server, "host"),
313 qdict_get_str(server, "service"));
314 monitor_printf(mon, " auth: %s\n", qdict_get_str(server, "auth"));
315
316 clients = qdict_get_qlist(server, "clients");
317 if (qlist_empty(clients)) {
318 monitor_printf(mon, "Client: none\n");
319 } else {
320 qlist_iter(clients, info_vnc_iter, mon);
321 }
322 }
323
324 /**
325 * do_info_vnc(): Show VNC server information
326 *
327 * Return a QDict with server information. Connected clients are returned
328 * as a QList of QDicts.
329 *
330 * The main QDict contains the following:
331 *
332 * - "enabled": true or false
333 * - "host": server's IP address
334 * - "family": address family ("ipv4" or "ipv6")
335 * - "service": server's port number
336 * - "auth": authentication method
337 * - "clients": a QList of all connected clients
338 *
339 * Clients are described by a QDict, with the following information:
340 *
341 * - "host": client's IP address
342 * - "family": address family ("ipv4" or "ipv6")
343 * - "service": client's port number
344 * - "x509_dname": TLS dname (optional)
345 * - "sasl_username": SASL username (optional)
346 *
347 * Example:
348 *
349 * { "enabled": true, "host": "0.0.0.0", "service": "50402", "auth": "vnc",
350 * "family": "ipv4",
351 * "clients": [{ "host": "127.0.0.1", "service": "50401", "family": "ipv4" }]}
352 */
353 void do_info_vnc(Monitor *mon, QObject **ret_data)
354 {
355 if (vnc_display == NULL || vnc_display->display == NULL) {
356 *ret_data = qobject_from_jsonf("{ 'enabled': false }");
357 } else {
358 QList *clist;
359 VncState *client;
360
361 clist = qlist_new();
362 QTAILQ_FOREACH(client, &vnc_display->clients, next) {
363 if (client->info) {
364 /* incref so that it's not freed by upper layers */
365 qobject_incref(client->info);
366 qlist_append_obj(clist, client->info);
367 }
368 }
369
370 *ret_data = qobject_from_jsonf("{ 'enabled': true, 'clients': %p }",
371 QOBJECT(clist));
372 assert(*ret_data != NULL);
373
374 if (vnc_server_info_put(qobject_to_qdict(*ret_data)) < 0) {
375 qobject_decref(*ret_data);
376 *ret_data = NULL;
377 }
378 }
379 }
380
381 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
382 return (vs->features & (1 << feature));
383 }
384
385 /* TODO
386 1) Get the queue working for IO.
387 2) there is some weirdness when using the -S option (the screen is grey
388 and not totally invalidated
389 3) resolutions > 1024
390 */
391
392 static int vnc_update_client(VncState *vs, int has_dirty);
393 static void vnc_disconnect_start(VncState *vs);
394 static void vnc_disconnect_finish(VncState *vs);
395 static void vnc_init_timer(VncDisplay *vd);
396 static void vnc_remove_timer(VncDisplay *vd);
397
398 static void vnc_colordepth(VncState *vs);
399 static void framebuffer_update_request(VncState *vs, int incremental,
400 int x_position, int y_position,
401 int w, int h);
402 static void vnc_refresh(void *opaque);
403 static int vnc_refresh_server_surface(VncDisplay *vd);
404
405 static inline void vnc_set_bit(uint32_t *d, int k)
406 {
407 d[k >> 5] |= 1 << (k & 0x1f);
408 }
409
410 static inline void vnc_clear_bit(uint32_t *d, int k)
411 {
412 d[k >> 5] &= ~(1 << (k & 0x1f));
413 }
414
415 static inline void vnc_set_bits(uint32_t *d, int n, int nb_words)
416 {
417 int j;
418
419 j = 0;
420 while (n >= 32) {
421 d[j++] = -1;
422 n -= 32;
423 }
424 if (n > 0)
425 d[j++] = (1 << n) - 1;
426 while (j < nb_words)
427 d[j++] = 0;
428 }
429
430 static inline int vnc_get_bit(const uint32_t *d, int k)
431 {
432 return (d[k >> 5] >> (k & 0x1f)) & 1;
433 }
434
435 static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2,
436 int nb_words)
437 {
438 int i;
439 for(i = 0; i < nb_words; i++) {
440 if ((d1[i] & d2[i]) != 0)
441 return 1;
442 }
443 return 0;
444 }
445
446 static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h)
447 {
448 int i;
449 VncDisplay *vd = ds->opaque;
450 struct VncSurface *s = &vd->guest;
451
452 h += y;
453
454 /* round x down to ensure the loop only spans one 16-pixel block per,
455 iteration. otherwise, if (x % 16) != 0, the last iteration may span
456 two 16-pixel blocks but we only mark the first as dirty
457 */
458 w += (x % 16);
459 x -= (x % 16);
460
461 x = MIN(x, s->ds->width);
462 y = MIN(y, s->ds->height);
463 w = MIN(x + w, s->ds->width) - x;
464 h = MIN(h, s->ds->height);
465
466 for (; y < h; y++)
467 for (i = 0; i < w; i += 16)
468 vnc_set_bit(s->dirty[y], (x + i) / 16);
469 }
470
471 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
472 int32_t encoding)
473 {
474 vnc_write_u16(vs, x);
475 vnc_write_u16(vs, y);
476 vnc_write_u16(vs, w);
477 vnc_write_u16(vs, h);
478
479 vnc_write_s32(vs, encoding);
480 }
481
482 void buffer_reserve(Buffer *buffer, size_t len)
483 {
484 if ((buffer->capacity - buffer->offset) < len) {
485 buffer->capacity += (len + 1024);
486 buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity);
487 if (buffer->buffer == NULL) {
488 fprintf(stderr, "vnc: out of memory\n");
489 exit(1);
490 }
491 }
492 }
493
494 int buffer_empty(Buffer *buffer)
495 {
496 return buffer->offset == 0;
497 }
498
499 uint8_t *buffer_end(Buffer *buffer)
500 {
501 return buffer->buffer + buffer->offset;
502 }
503
504 void buffer_reset(Buffer *buffer)
505 {
506 buffer->offset = 0;
507 }
508
509 void buffer_append(Buffer *buffer, const void *data, size_t len)
510 {
511 memcpy(buffer->buffer + buffer->offset, data, len);
512 buffer->offset += len;
513 }
514
515 static void vnc_dpy_resize(DisplayState *ds)
516 {
517 int size_changed;
518 VncDisplay *vd = ds->opaque;
519 VncState *vs;
520
521 /* server surface */
522 if (!vd->server)
523 vd->server = qemu_mallocz(sizeof(*vd->server));
524 if (vd->server->data)
525 qemu_free(vd->server->data);
526 *(vd->server) = *(ds->surface);
527 vd->server->data = qemu_mallocz(vd->server->linesize *
528 vd->server->height);
529
530 /* guest surface */
531 if (!vd->guest.ds)
532 vd->guest.ds = qemu_mallocz(sizeof(*vd->guest.ds));
533 if (ds_get_bytes_per_pixel(ds) != vd->guest.ds->pf.bytes_per_pixel)
534 console_color_init(ds);
535 size_changed = ds_get_width(ds) != vd->guest.ds->width ||
536 ds_get_height(ds) != vd->guest.ds->height;
537 *(vd->guest.ds) = *(ds->surface);
538 memset(vd->guest.dirty, 0xFF, sizeof(vd->guest.dirty));
539
540 QTAILQ_FOREACH(vs, &vd->clients, next) {
541 vnc_colordepth(vs);
542 if (size_changed) {
543 if (vs->csock != -1 && vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
544 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
545 vnc_write_u8(vs, 0);
546 vnc_write_u16(vs, 1); /* number of rects */
547 vnc_framebuffer_update(vs, 0, 0, ds_get_width(ds), ds_get_height(ds),
548 VNC_ENCODING_DESKTOPRESIZE);
549 vnc_flush(vs);
550 }
551 }
552 memset(vs->dirty, 0xFF, sizeof(vs->dirty));
553 }
554 }
555
556 /* fastest code */
557 static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
558 {
559 vnc_write(vs, pixels, size);
560 }
561
562 /* slowest but generic code. */
563 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v)
564 {
565 uint8_t r, g, b;
566 VncDisplay *vd = vs->vd;
567
568 r = ((((v & vd->server->pf.rmask) >> vd->server->pf.rshift) << vs->clientds.pf.rbits) >>
569 vd->server->pf.rbits);
570 g = ((((v & vd->server->pf.gmask) >> vd->server->pf.gshift) << vs->clientds.pf.gbits) >>
571 vd->server->pf.gbits);
572 b = ((((v & vd->server->pf.bmask) >> vd->server->pf.bshift) << vs->clientds.pf.bbits) >>
573 vd->server->pf.bbits);
574 v = (r << vs->clientds.pf.rshift) |
575 (g << vs->clientds.pf.gshift) |
576 (b << vs->clientds.pf.bshift);
577 switch(vs->clientds.pf.bytes_per_pixel) {
578 case 1:
579 buf[0] = v;
580 break;
581 case 2:
582 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
583 buf[0] = v >> 8;
584 buf[1] = v;
585 } else {
586 buf[1] = v >> 8;
587 buf[0] = v;
588 }
589 break;
590 default:
591 case 4:
592 if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) {
593 buf[0] = v >> 24;
594 buf[1] = v >> 16;
595 buf[2] = v >> 8;
596 buf[3] = v;
597 } else {
598 buf[3] = v >> 24;
599 buf[2] = v >> 16;
600 buf[1] = v >> 8;
601 buf[0] = v;
602 }
603 break;
604 }
605 }
606
607 static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size)
608 {
609 uint8_t buf[4];
610 VncDisplay *vd = vs->vd;
611
612 if (vd->server->pf.bytes_per_pixel == 4) {
613 uint32_t *pixels = pixels1;
614 int n, i;
615 n = size >> 2;
616 for(i = 0; i < n; i++) {
617 vnc_convert_pixel(vs, buf, pixels[i]);
618 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
619 }
620 } else if (vd->server->pf.bytes_per_pixel == 2) {
621 uint16_t *pixels = pixels1;
622 int n, i;
623 n = size >> 1;
624 for(i = 0; i < n; i++) {
625 vnc_convert_pixel(vs, buf, pixels[i]);
626 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
627 }
628 } else if (vd->server->pf.bytes_per_pixel == 1) {
629 uint8_t *pixels = pixels1;
630 int n, i;
631 n = size;
632 for(i = 0; i < n; i++) {
633 vnc_convert_pixel(vs, buf, pixels[i]);
634 vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel);
635 }
636 } else {
637 fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n");
638 }
639 }
640
641 void vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
642 {
643 int i;
644 uint8_t *row;
645 VncDisplay *vd = vs->vd;
646
647 row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
648 for (i = 0; i < h; i++) {
649 vs->write_pixels(vs, row, w * ds_get_bytes_per_pixel(vs->ds));
650 row += ds_get_linesize(vs->ds);
651 }
652 }
653
654 static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
655 {
656 switch(vs->vnc_encoding) {
657 case VNC_ENCODING_ZLIB:
658 vnc_hextile_send_framebuffer_update(vs, x, y, w, h);
659 break;
660 case VNC_ENCODING_HEXTILE:
661 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE);
662 vnc_hextile_send_framebuffer_update(vs, x, y, w, h);
663 break;
664 default:
665 vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW);
666 vnc_raw_send_framebuffer_update(vs, x, y, w, h);
667 break;
668 }
669 }
670
671 static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
672 {
673 /* send bitblit op to the vnc client */
674 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
675 vnc_write_u8(vs, 0);
676 vnc_write_u16(vs, 1); /* number of rects */
677 vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT);
678 vnc_write_u16(vs, src_x);
679 vnc_write_u16(vs, src_y);
680 vnc_flush(vs);
681 }
682
683 static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
684 {
685 VncDisplay *vd = ds->opaque;
686 VncState *vs, *vn;
687 uint8_t *src_row;
688 uint8_t *dst_row;
689 int i,x,y,pitch,depth,inc,w_lim,s;
690 int cmp_bytes;
691
692 vnc_refresh_server_surface(vd);
693 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
694 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
695 vs->force_update = 1;
696 vnc_update_client(vs, 1);
697 /* vs might be free()ed here */
698 }
699 }
700
701 /* do bitblit op on the local surface too */
702 pitch = ds_get_linesize(vd->ds);
703 depth = ds_get_bytes_per_pixel(vd->ds);
704 src_row = vd->server->data + pitch * src_y + depth * src_x;
705 dst_row = vd->server->data + pitch * dst_y + depth * dst_x;
706 y = dst_y;
707 inc = 1;
708 if (dst_y > src_y) {
709 /* copy backwards */
710 src_row += pitch * (h-1);
711 dst_row += pitch * (h-1);
712 pitch = -pitch;
713 y = dst_y + h - 1;
714 inc = -1;
715 }
716 w_lim = w - (16 - (dst_x % 16));
717 if (w_lim < 0)
718 w_lim = w;
719 else
720 w_lim = w - (w_lim % 16);
721 for (i = 0; i < h; i++) {
722 for (x = 0; x <= w_lim;
723 x += s, src_row += cmp_bytes, dst_row += cmp_bytes) {
724 if (x == w_lim) {
725 if ((s = w - w_lim) == 0)
726 break;
727 } else if (!x) {
728 s = (16 - (dst_x % 16));
729 s = MIN(s, w_lim);
730 } else {
731 s = 16;
732 }
733 cmp_bytes = s * depth;
734 if (memcmp(src_row, dst_row, cmp_bytes) == 0)
735 continue;
736 memmove(dst_row, src_row, cmp_bytes);
737 QTAILQ_FOREACH(vs, &vd->clients, next) {
738 if (!vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
739 vnc_set_bit(vs->dirty[y], ((x + dst_x) / 16));
740 }
741 }
742 }
743 src_row += pitch - w * depth;
744 dst_row += pitch - w * depth;
745 y += inc;
746 }
747
748 QTAILQ_FOREACH(vs, &vd->clients, next) {
749 if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) {
750 vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h);
751 }
752 }
753 }
754
755 static int find_and_clear_dirty_height(struct VncState *vs,
756 int y, int last_x, int x)
757 {
758 int h;
759 VncDisplay *vd = vs->vd;
760
761 for (h = 1; h < (vd->server->height - y); h++) {
762 int tmp_x;
763 if (!vnc_get_bit(vs->dirty[y + h], last_x))
764 break;
765 for (tmp_x = last_x; tmp_x < x; tmp_x++)
766 vnc_clear_bit(vs->dirty[y + h], tmp_x);
767 }
768
769 return h;
770 }
771
772 static int vnc_update_client(VncState *vs, int has_dirty)
773 {
774 if (vs->need_update && vs->csock != -1) {
775 VncDisplay *vd = vs->vd;
776 int y;
777 int n_rectangles;
778 int saved_offset;
779
780 if (vs->output.offset && !vs->audio_cap && !vs->force_update)
781 /* kernel send buffers are full -> drop frames to throttle */
782 return 0;
783
784 if (!has_dirty && !vs->audio_cap && !vs->force_update)
785 return 0;
786
787 /*
788 * Send screen updates to the vnc client using the server
789 * surface and server dirty map. guest surface updates
790 * happening in parallel don't disturb us, the next pass will
791 * send them to the client.
792 */
793 n_rectangles = 0;
794 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
795 vnc_write_u8(vs, 0);
796 saved_offset = vs->output.offset;
797 vnc_write_u16(vs, 0);
798
799 for (y = 0; y < vd->server->height; y++) {
800 int x;
801 int last_x = -1;
802 for (x = 0; x < vd->server->width / 16; x++) {
803 if (vnc_get_bit(vs->dirty[y], x)) {
804 if (last_x == -1) {
805 last_x = x;
806 }
807 vnc_clear_bit(vs->dirty[y], x);
808 } else {
809 if (last_x != -1) {
810 int h = find_and_clear_dirty_height(vs, y, last_x, x);
811 send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
812 n_rectangles++;
813 }
814 last_x = -1;
815 }
816 }
817 if (last_x != -1) {
818 int h = find_and_clear_dirty_height(vs, y, last_x, x);
819 send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h);
820 n_rectangles++;
821 }
822 }
823 vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF;
824 vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF;
825 vnc_flush(vs);
826 vs->force_update = 0;
827 return n_rectangles;
828 }
829
830 if (vs->csock == -1)
831 vnc_disconnect_finish(vs);
832
833 return 0;
834 }
835
836 /* audio */
837 static void audio_capture_notify(void *opaque, audcnotification_e cmd)
838 {
839 VncState *vs = opaque;
840
841 switch (cmd) {
842 case AUD_CNOTIFY_DISABLE:
843 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
844 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
845 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_END);
846 vnc_flush(vs);
847 break;
848
849 case AUD_CNOTIFY_ENABLE:
850 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
851 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
852 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_BEGIN);
853 vnc_flush(vs);
854 break;
855 }
856 }
857
858 static void audio_capture_destroy(void *opaque)
859 {
860 }
861
862 static void audio_capture(void *opaque, void *buf, int size)
863 {
864 VncState *vs = opaque;
865
866 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU);
867 vnc_write_u8(vs, VNC_MSG_SERVER_QEMU_AUDIO);
868 vnc_write_u16(vs, VNC_MSG_SERVER_QEMU_AUDIO_DATA);
869 vnc_write_u32(vs, size);
870 vnc_write(vs, buf, size);
871 vnc_flush(vs);
872 }
873
874 static void audio_add(VncState *vs)
875 {
876 struct audio_capture_ops ops;
877
878 if (vs->audio_cap) {
879 monitor_printf(default_mon, "audio already running\n");
880 return;
881 }
882
883 ops.notify = audio_capture_notify;
884 ops.destroy = audio_capture_destroy;
885 ops.capture = audio_capture;
886
887 vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs);
888 if (!vs->audio_cap) {
889 monitor_printf(default_mon, "Failed to add audio capture\n");
890 }
891 }
892
893 static void audio_del(VncState *vs)
894 {
895 if (vs->audio_cap) {
896 AUD_del_capture(vs->audio_cap, vs);
897 vs->audio_cap = NULL;
898 }
899 }
900
901 static void vnc_disconnect_start(VncState *vs)
902 {
903 if (vs->csock == -1)
904 return;
905 qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL);
906 closesocket(vs->csock);
907 vs->csock = -1;
908 }
909
910 static void vnc_disconnect_finish(VncState *vs)
911 {
912 vnc_qmp_event(vs, QEVENT_VNC_DISCONNECTED);
913
914 if (vs->input.buffer) {
915 qemu_free(vs->input.buffer);
916 vs->input.buffer = NULL;
917 }
918 if (vs->output.buffer) {
919 qemu_free(vs->output.buffer);
920 vs->output.buffer = NULL;
921 }
922
923 qobject_decref(vs->info);
924
925 #ifdef CONFIG_VNC_TLS
926 vnc_tls_client_cleanup(vs);
927 #endif /* CONFIG_VNC_TLS */
928 #ifdef CONFIG_VNC_SASL
929 vnc_sasl_client_cleanup(vs);
930 #endif /* CONFIG_VNC_SASL */
931 audio_del(vs);
932
933 QTAILQ_REMOVE(&vs->vd->clients, vs, next);
934
935 if (QTAILQ_EMPTY(&vs->vd->clients)) {
936 dcl->idle = 1;
937 }
938
939 qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
940 vnc_remove_timer(vs->vd);
941 if (vs->vd->lock_key_sync)
942 qemu_remove_led_event_handler(vs->led);
943 qemu_free(vs);
944 }
945
946 int vnc_client_io_error(VncState *vs, int ret, int last_errno)
947 {
948 if (ret == 0 || ret == -1) {
949 if (ret == -1) {
950 switch (last_errno) {
951 case EINTR:
952 case EAGAIN:
953 #ifdef _WIN32
954 case WSAEWOULDBLOCK:
955 #endif
956 return 0;
957 default:
958 break;
959 }
960 }
961
962 VNC_DEBUG("Closing down client sock: ret %d, errno %d\n",
963 ret, ret < 0 ? last_errno : 0);
964 vnc_disconnect_start(vs);
965
966 return 0;
967 }
968 return ret;
969 }
970
971
972 void vnc_client_error(VncState *vs)
973 {
974 VNC_DEBUG("Closing down client sock: protocol error\n");
975 vnc_disconnect_start(vs);
976 }
977
978
979 /*
980 * Called to write a chunk of data to the client socket. The data may
981 * be the raw data, or may have already been encoded by SASL.
982 * The data will be written either straight onto the socket, or
983 * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled
984 *
985 * NB, it is theoretically possible to have 2 layers of encryption,
986 * both SASL, and this TLS layer. It is highly unlikely in practice
987 * though, since SASL encryption will typically be a no-op if TLS
988 * is active
989 *
990 * Returns the number of bytes written, which may be less than
991 * the requested 'datalen' if the socket would block. Returns
992 * -1 on error, and disconnects the client socket.
993 */
994 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
995 {
996 long ret;
997 #ifdef CONFIG_VNC_TLS
998 if (vs->tls.session) {
999 ret = gnutls_write(vs->tls.session, data, datalen);
1000 if (ret < 0) {
1001 if (ret == GNUTLS_E_AGAIN)
1002 errno = EAGAIN;
1003 else
1004 errno = EIO;
1005 ret = -1;
1006 }
1007 } else
1008 #endif /* CONFIG_VNC_TLS */
1009 ret = send(vs->csock, (const void *)data, datalen, 0);
1010 VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
1011 return vnc_client_io_error(vs, ret, socket_error());
1012 }
1013
1014
1015 /*
1016 * Called to write buffered data to the client socket, when not
1017 * using any SASL SSF encryption layers. Will write as much data
1018 * as possible without blocking. If all buffered data is written,
1019 * will switch the FD poll() handler back to read monitoring.
1020 *
1021 * Returns the number of bytes written, which may be less than
1022 * the buffered output data if the socket would block. Returns
1023 * -1 on error, and disconnects the client socket.
1024 */
1025 static long vnc_client_write_plain(VncState *vs)
1026 {
1027 long ret;
1028
1029 #ifdef CONFIG_VNC_SASL
1030 VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n",
1031 vs->output.buffer, vs->output.capacity, vs->output.offset,
1032 vs->sasl.waitWriteSSF);
1033
1034 if (vs->sasl.conn &&
1035 vs->sasl.runSSF &&
1036 vs->sasl.waitWriteSSF) {
1037 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF);
1038 if (ret)
1039 vs->sasl.waitWriteSSF -= ret;
1040 } else
1041 #endif /* CONFIG_VNC_SASL */
1042 ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset);
1043 if (!ret)
1044 return 0;
1045
1046 memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret));
1047 vs->output.offset -= ret;
1048
1049 if (vs->output.offset == 0) {
1050 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
1051 }
1052
1053 return ret;
1054 }
1055
1056
1057 /*
1058 * First function called whenever there is data to be written to
1059 * the client socket. Will delegate actual work according to whether
1060 * SASL SSF layers are enabled (thus requiring encryption calls)
1061 */
1062 void vnc_client_write(void *opaque)
1063 {
1064 VncState *vs = opaque;
1065
1066 #ifdef CONFIG_VNC_SASL
1067 if (vs->sasl.conn &&
1068 vs->sasl.runSSF &&
1069 !vs->sasl.waitWriteSSF) {
1070 vnc_client_write_sasl(vs);
1071 } else
1072 #endif /* CONFIG_VNC_SASL */
1073 vnc_client_write_plain(vs);
1074 }
1075
1076 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
1077 {
1078 vs->read_handler = func;
1079 vs->read_handler_expect = expecting;
1080 }
1081
1082
1083 /*
1084 * Called to read a chunk of data from the client socket. The data may
1085 * be the raw data, or may need to be further decoded by SASL.
1086 * The data will be read either straight from to the socket, or
1087 * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled
1088 *
1089 * NB, it is theoretically possible to have 2 layers of encryption,
1090 * both SASL, and this TLS layer. It is highly unlikely in practice
1091 * though, since SASL encryption will typically be a no-op if TLS
1092 * is active
1093 *
1094 * Returns the number of bytes read, which may be less than
1095 * the requested 'datalen' if the socket would block. Returns
1096 * -1 on error, and disconnects the client socket.
1097 */
1098 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
1099 {
1100 long ret;
1101 #ifdef CONFIG_VNC_TLS
1102 if (vs->tls.session) {
1103 ret = gnutls_read(vs->tls.session, data, datalen);
1104 if (ret < 0) {
1105 if (ret == GNUTLS_E_AGAIN)
1106 errno = EAGAIN;
1107 else
1108 errno = EIO;
1109 ret = -1;
1110 }
1111 } else
1112 #endif /* CONFIG_VNC_TLS */
1113 ret = recv(vs->csock, (void *)data, datalen, 0);
1114 VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
1115 return vnc_client_io_error(vs, ret, socket_error());
1116 }
1117
1118
1119 /*
1120 * Called to read data from the client socket to the input buffer,
1121 * when not using any SASL SSF encryption layers. Will read as much
1122 * data as possible without blocking.
1123 *
1124 * Returns the number of bytes read. Returns -1 on error, and
1125 * disconnects the client socket.
1126 */
1127 static long vnc_client_read_plain(VncState *vs)
1128 {
1129 int ret;
1130 VNC_DEBUG("Read plain %p size %zd offset %zd\n",
1131 vs->input.buffer, vs->input.capacity, vs->input.offset);
1132 buffer_reserve(&vs->input, 4096);
1133 ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096);
1134 if (!ret)
1135 return 0;
1136 vs->input.offset += ret;
1137 return ret;
1138 }
1139
1140
1141 /*
1142 * First function called whenever there is more data to be read from
1143 * the client socket. Will delegate actual work according to whether
1144 * SASL SSF layers are enabled (thus requiring decryption calls)
1145 */
1146 void vnc_client_read(void *opaque)
1147 {
1148 VncState *vs = opaque;
1149 long ret;
1150
1151 #ifdef CONFIG_VNC_SASL
1152 if (vs->sasl.conn && vs->sasl.runSSF)
1153 ret = vnc_client_read_sasl(vs);
1154 else
1155 #endif /* CONFIG_VNC_SASL */
1156 ret = vnc_client_read_plain(vs);
1157 if (!ret) {
1158 if (vs->csock == -1)
1159 vnc_disconnect_finish(vs);
1160 return;
1161 }
1162
1163 while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) {
1164 size_t len = vs->read_handler_expect;
1165 int ret;
1166
1167 ret = vs->read_handler(vs, vs->input.buffer, len);
1168 if (vs->csock == -1) {
1169 vnc_disconnect_finish(vs);
1170 return;
1171 }
1172
1173 if (!ret) {
1174 memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len));
1175 vs->input.offset -= len;
1176 } else {
1177 vs->read_handler_expect = ret;
1178 }
1179 }
1180 }
1181
1182 void vnc_write(VncState *vs, const void *data, size_t len)
1183 {
1184 buffer_reserve(&vs->output, len);
1185
1186 if (vs->csock != -1 && buffer_empty(&vs->output)) {
1187 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
1188 }
1189
1190 buffer_append(&vs->output, data, len);
1191 }
1192
1193 void vnc_write_s32(VncState *vs, int32_t value)
1194 {
1195 vnc_write_u32(vs, *(uint32_t *)&value);
1196 }
1197
1198 void vnc_write_u32(VncState *vs, uint32_t value)
1199 {
1200 uint8_t buf[4];
1201
1202 buf[0] = (value >> 24) & 0xFF;
1203 buf[1] = (value >> 16) & 0xFF;
1204 buf[2] = (value >> 8) & 0xFF;
1205 buf[3] = value & 0xFF;
1206
1207 vnc_write(vs, buf, 4);
1208 }
1209
1210 void vnc_write_u16(VncState *vs, uint16_t value)
1211 {
1212 uint8_t buf[2];
1213
1214 buf[0] = (value >> 8) & 0xFF;
1215 buf[1] = value & 0xFF;
1216
1217 vnc_write(vs, buf, 2);
1218 }
1219
1220 void vnc_write_u8(VncState *vs, uint8_t value)
1221 {
1222 vnc_write(vs, (char *)&value, 1);
1223 }
1224
1225 void vnc_flush(VncState *vs)
1226 {
1227 if (vs->csock != -1 && vs->output.offset)
1228 vnc_client_write(vs);
1229 }
1230
1231 uint8_t read_u8(uint8_t *data, size_t offset)
1232 {
1233 return data[offset];
1234 }
1235
1236 uint16_t read_u16(uint8_t *data, size_t offset)
1237 {
1238 return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
1239 }
1240
1241 int32_t read_s32(uint8_t *data, size_t offset)
1242 {
1243 return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
1244 (data[offset + 2] << 8) | data[offset + 3]);
1245 }
1246
1247 uint32_t read_u32(uint8_t *data, size_t offset)
1248 {
1249 return ((data[offset] << 24) | (data[offset + 1] << 16) |
1250 (data[offset + 2] << 8) | data[offset + 3]);
1251 }
1252
1253 static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
1254 {
1255 }
1256
1257 static void check_pointer_type_change(Notifier *notifier)
1258 {
1259 VncState *vs = container_of(notifier, VncState, mouse_mode_notifier);
1260 int absolute = kbd_mouse_is_absolute();
1261
1262 if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) {
1263 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1264 vnc_write_u8(vs, 0);
1265 vnc_write_u16(vs, 1);
1266 vnc_framebuffer_update(vs, absolute, 0,
1267 ds_get_width(vs->ds), ds_get_height(vs->ds),
1268 VNC_ENCODING_POINTER_TYPE_CHANGE);
1269 vnc_flush(vs);
1270 }
1271 vs->absolute = absolute;
1272 }
1273
1274 static void pointer_event(VncState *vs, int button_mask, int x, int y)
1275 {
1276 int buttons = 0;
1277 int dz = 0;
1278
1279 if (button_mask & 0x01)
1280 buttons |= MOUSE_EVENT_LBUTTON;
1281 if (button_mask & 0x02)
1282 buttons |= MOUSE_EVENT_MBUTTON;
1283 if (button_mask & 0x04)
1284 buttons |= MOUSE_EVENT_RBUTTON;
1285 if (button_mask & 0x08)
1286 dz = -1;
1287 if (button_mask & 0x10)
1288 dz = 1;
1289
1290 if (vs->absolute) {
1291 kbd_mouse_event(ds_get_width(vs->ds) > 1 ?
1292 x * 0x7FFF / (ds_get_width(vs->ds) - 1) : 0x4000,
1293 ds_get_height(vs->ds) > 1 ?
1294 y * 0x7FFF / (ds_get_height(vs->ds) - 1) : 0x4000,
1295 dz, buttons);
1296 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
1297 x -= 0x7FFF;
1298 y -= 0x7FFF;
1299
1300 kbd_mouse_event(x, y, dz, buttons);
1301 } else {
1302 if (vs->last_x != -1)
1303 kbd_mouse_event(x - vs->last_x,
1304 y - vs->last_y,
1305 dz, buttons);
1306 vs->last_x = x;
1307 vs->last_y = y;
1308 }
1309 }
1310
1311 static void reset_keys(VncState *vs)
1312 {
1313 int i;
1314 for(i = 0; i < 256; i++) {
1315 if (vs->modifiers_state[i]) {
1316 if (i & SCANCODE_GREY)
1317 kbd_put_keycode(SCANCODE_EMUL0);
1318 kbd_put_keycode(i | SCANCODE_UP);
1319 vs->modifiers_state[i] = 0;
1320 }
1321 }
1322 }
1323
1324 static void press_key(VncState *vs, int keysym)
1325 {
1326 int keycode = keysym2scancode(vs->vd->kbd_layout, keysym) & SCANCODE_KEYMASK;
1327 if (keycode & SCANCODE_GREY)
1328 kbd_put_keycode(SCANCODE_EMUL0);
1329 kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
1330 if (keycode & SCANCODE_GREY)
1331 kbd_put_keycode(SCANCODE_EMUL0);
1332 kbd_put_keycode(keycode | SCANCODE_UP);
1333 }
1334
1335 static void kbd_leds(void *opaque, int ledstate)
1336 {
1337 VncState *vs = opaque;
1338 int caps, num;
1339
1340 caps = ledstate & QEMU_CAPS_LOCK_LED ? 1 : 0;
1341 num = ledstate & QEMU_NUM_LOCK_LED ? 1 : 0;
1342
1343 if (vs->modifiers_state[0x3a] != caps) {
1344 vs->modifiers_state[0x3a] = caps;
1345 }
1346 if (vs->modifiers_state[0x45] != num) {
1347 vs->modifiers_state[0x45] = num;
1348 }
1349 }
1350
1351 static void do_key_event(VncState *vs, int down, int keycode, int sym)
1352 {
1353 /* QEMU console switch */
1354 switch(keycode) {
1355 case 0x2a: /* Left Shift */
1356 case 0x36: /* Right Shift */
1357 case 0x1d: /* Left CTRL */
1358 case 0x9d: /* Right CTRL */
1359 case 0x38: /* Left ALT */
1360 case 0xb8: /* Right ALT */
1361 if (down)
1362 vs->modifiers_state[keycode] = 1;
1363 else
1364 vs->modifiers_state[keycode] = 0;
1365 break;
1366 case 0x02 ... 0x0a: /* '1' to '9' keys */
1367 if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) {
1368 /* Reset the modifiers sent to the current console */
1369 reset_keys(vs);
1370 console_select(keycode - 0x02);
1371 return;
1372 }
1373 break;
1374 case 0x3a: /* CapsLock */
1375 case 0x45: /* NumLock */
1376 if (down)
1377 vs->modifiers_state[keycode] ^= 1;
1378 break;
1379 }
1380
1381 if (vs->vd->lock_key_sync &&
1382 keycode_is_keypad(vs->vd->kbd_layout, keycode)) {
1383 /* If the numlock state needs to change then simulate an additional
1384 keypress before sending this one. This will happen if the user
1385 toggles numlock away from the VNC window.
1386 */
1387 if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) {
1388 if (!vs->modifiers_state[0x45]) {
1389 vs->modifiers_state[0x45] = 1;
1390 press_key(vs, 0xff7f);
1391 }
1392 } else {
1393 if (vs->modifiers_state[0x45]) {
1394 vs->modifiers_state[0x45] = 0;
1395 press_key(vs, 0xff7f);
1396 }
1397 }
1398 }
1399
1400 if (vs->vd->lock_key_sync &&
1401 ((sym >= 'A' && sym <= 'Z') || (sym >= 'a' && sym <= 'z'))) {
1402 /* If the capslock state needs to change then simulate an additional
1403 keypress before sending this one. This will happen if the user
1404 toggles capslock away from the VNC window.
1405 */
1406 int uppercase = !!(sym >= 'A' && sym <= 'Z');
1407 int shift = !!(vs->modifiers_state[0x2a] | vs->modifiers_state[0x36]);
1408 int capslock = !!(vs->modifiers_state[0x3a]);
1409 if (capslock) {
1410 if (uppercase == shift) {
1411 vs->modifiers_state[0x3a] = 0;
1412 press_key(vs, 0xffe5);
1413 }
1414 } else {
1415 if (uppercase != shift) {
1416 vs->modifiers_state[0x3a] = 1;
1417 press_key(vs, 0xffe5);
1418 }
1419 }
1420 }
1421
1422 if (is_graphic_console()) {
1423 if (keycode & SCANCODE_GREY)
1424 kbd_put_keycode(SCANCODE_EMUL0);
1425 if (down)
1426 kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
1427 else
1428 kbd_put_keycode(keycode | SCANCODE_UP);
1429 } else {
1430 /* QEMU console emulation */
1431 if (down) {
1432 int numlock = vs->modifiers_state[0x45];
1433 switch (keycode) {
1434 case 0x2a: /* Left Shift */
1435 case 0x36: /* Right Shift */
1436 case 0x1d: /* Left CTRL */
1437 case 0x9d: /* Right CTRL */
1438 case 0x38: /* Left ALT */
1439 case 0xb8: /* Right ALT */
1440 break;
1441 case 0xc8:
1442 kbd_put_keysym(QEMU_KEY_UP);
1443 break;
1444 case 0xd0:
1445 kbd_put_keysym(QEMU_KEY_DOWN);
1446 break;
1447 case 0xcb:
1448 kbd_put_keysym(QEMU_KEY_LEFT);
1449 break;
1450 case 0xcd:
1451 kbd_put_keysym(QEMU_KEY_RIGHT);
1452 break;
1453 case 0xd3:
1454 kbd_put_keysym(QEMU_KEY_DELETE);
1455 break;
1456 case 0xc7:
1457 kbd_put_keysym(QEMU_KEY_HOME);
1458 break;
1459 case 0xcf:
1460 kbd_put_keysym(QEMU_KEY_END);
1461 break;
1462 case 0xc9:
1463 kbd_put_keysym(QEMU_KEY_PAGEUP);
1464 break;
1465 case 0xd1:
1466 kbd_put_keysym(QEMU_KEY_PAGEDOWN);
1467 break;
1468
1469 case 0x47:
1470 kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME);
1471 break;
1472 case 0x48:
1473 kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP);
1474 break;
1475 case 0x49:
1476 kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP);
1477 break;
1478 case 0x4b:
1479 kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT);
1480 break;
1481 case 0x4c:
1482 kbd_put_keysym('5');
1483 break;
1484 case 0x4d:
1485 kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT);
1486 break;
1487 case 0x4f:
1488 kbd_put_keysym(numlock ? '1' : QEMU_KEY_END);
1489 break;
1490 case 0x50:
1491 kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN);
1492 break;
1493 case 0x51:
1494 kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN);
1495 break;
1496 case 0x52:
1497 kbd_put_keysym('0');
1498 break;
1499 case 0x53:
1500 kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE);
1501 break;
1502
1503 case 0xb5:
1504 kbd_put_keysym('/');
1505 break;
1506 case 0x37:
1507 kbd_put_keysym('*');
1508 break;
1509 case 0x4a:
1510 kbd_put_keysym('-');
1511 break;
1512 case 0x4e:
1513 kbd_put_keysym('+');
1514 break;
1515 case 0x9c:
1516 kbd_put_keysym('\n');
1517 break;
1518
1519 default:
1520 kbd_put_keysym(sym);
1521 break;
1522 }
1523 }
1524 }
1525 }
1526
1527 static void key_event(VncState *vs, int down, uint32_t sym)
1528 {
1529 int keycode;
1530 int lsym = sym;
1531
1532 if (lsym >= 'A' && lsym <= 'Z' && is_graphic_console()) {
1533 lsym = lsym - 'A' + 'a';
1534 }
1535
1536 keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF) & SCANCODE_KEYMASK;
1537 do_key_event(vs, down, keycode, sym);
1538 }
1539
1540 static void ext_key_event(VncState *vs, int down,
1541 uint32_t sym, uint16_t keycode)
1542 {
1543 /* if the user specifies a keyboard layout, always use it */
1544 if (keyboard_layout)
1545 key_event(vs, down, sym);
1546 else
1547 do_key_event(vs, down, keycode, sym);
1548 }
1549
1550 static void framebuffer_update_request(VncState *vs, int incremental,
1551 int x_position, int y_position,
1552 int w, int h)
1553 {
1554 if (y_position > ds_get_height(vs->ds))
1555 y_position = ds_get_height(vs->ds);
1556 if (y_position + h >= ds_get_height(vs->ds))
1557 h = ds_get_height(vs->ds) - y_position;
1558
1559 int i;
1560 vs->need_update = 1;
1561 if (!incremental) {
1562 vs->force_update = 1;
1563 for (i = 0; i < h; i++) {
1564 vnc_set_bits(vs->dirty[y_position + i],
1565 (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS);
1566 }
1567 }
1568 }
1569
1570 static void send_ext_key_event_ack(VncState *vs)
1571 {
1572 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1573 vnc_write_u8(vs, 0);
1574 vnc_write_u16(vs, 1);
1575 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1576 VNC_ENCODING_EXT_KEY_EVENT);
1577 vnc_flush(vs);
1578 }
1579
1580 static void send_ext_audio_ack(VncState *vs)
1581 {
1582 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1583 vnc_write_u8(vs, 0);
1584 vnc_write_u16(vs, 1);
1585 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds),
1586 VNC_ENCODING_AUDIO);
1587 vnc_flush(vs);
1588 }
1589
1590 static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
1591 {
1592 int i;
1593 unsigned int enc = 0;
1594
1595 vnc_zlib_init(vs);
1596 vs->features = 0;
1597 vs->vnc_encoding = 0;
1598 vs->tight_compression = 9;
1599 vs->tight_quality = 9;
1600 vs->absolute = -1;
1601
1602 for (i = n_encodings - 1; i >= 0; i--) {
1603 enc = encodings[i];
1604 switch (enc) {
1605 case VNC_ENCODING_RAW:
1606 vs->vnc_encoding = enc;
1607 break;
1608 case VNC_ENCODING_COPYRECT:
1609 vs->features |= VNC_FEATURE_COPYRECT_MASK;
1610 break;
1611 case VNC_ENCODING_HEXTILE:
1612 vs->features |= VNC_FEATURE_HEXTILE_MASK;
1613 vs->vnc_encoding = enc;
1614 break;
1615 case VNC_ENCODING_ZLIB:
1616 vs->features |= VNC_FEATURE_ZLIB_MASK;
1617 vs->vnc_encoding = enc;
1618 break;
1619 case VNC_ENCODING_DESKTOPRESIZE:
1620 vs->features |= VNC_FEATURE_RESIZE_MASK;
1621 break;
1622 case VNC_ENCODING_POINTER_TYPE_CHANGE:
1623 vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK;
1624 break;
1625 case VNC_ENCODING_EXT_KEY_EVENT:
1626 send_ext_key_event_ack(vs);
1627 break;
1628 case VNC_ENCODING_AUDIO:
1629 send_ext_audio_ack(vs);
1630 break;
1631 case VNC_ENCODING_WMVi:
1632 vs->features |= VNC_FEATURE_WMVI_MASK;
1633 break;
1634 case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9:
1635 vs->tight_compression = (enc & 0x0F);
1636 break;
1637 case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9:
1638 vs->tight_quality = (enc & 0x0F);
1639 break;
1640 default:
1641 VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc);
1642 break;
1643 }
1644 }
1645 }
1646
1647 static void set_pixel_conversion(VncState *vs)
1648 {
1649 if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
1650 (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG) &&
1651 !memcmp(&(vs->clientds.pf), &(vs->ds->surface->pf), sizeof(PixelFormat))) {
1652 vs->write_pixels = vnc_write_pixels_copy;
1653 vnc_hextile_set_pixel_conversion(vs, 0);
1654 } else {
1655 vs->write_pixels = vnc_write_pixels_generic;
1656 vnc_hextile_set_pixel_conversion(vs, 1);
1657 }
1658 }
1659
1660 static void set_pixel_format(VncState *vs,
1661 int bits_per_pixel, int depth,
1662 int big_endian_flag, int true_color_flag,
1663 int red_max, int green_max, int blue_max,
1664 int red_shift, int green_shift, int blue_shift)
1665 {
1666 if (!true_color_flag) {
1667 vnc_client_error(vs);
1668 return;
1669 }
1670
1671 vs->clientds = *(vs->vd->guest.ds);
1672 vs->clientds.pf.rmax = red_max;
1673 count_bits(vs->clientds.pf.rbits, red_max);
1674 vs->clientds.pf.rshift = red_shift;
1675 vs->clientds.pf.rmask = red_max << red_shift;
1676 vs->clientds.pf.gmax = green_max;
1677 count_bits(vs->clientds.pf.gbits, green_max);
1678 vs->clientds.pf.gshift = green_shift;
1679 vs->clientds.pf.gmask = green_max << green_shift;
1680 vs->clientds.pf.bmax = blue_max;
1681 count_bits(vs->clientds.pf.bbits, blue_max);
1682 vs->clientds.pf.bshift = blue_shift;
1683 vs->clientds.pf.bmask = blue_max << blue_shift;
1684 vs->clientds.pf.bits_per_pixel = bits_per_pixel;
1685 vs->clientds.pf.bytes_per_pixel = bits_per_pixel / 8;
1686 vs->clientds.pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel;
1687 vs->clientds.flags = big_endian_flag ? QEMU_BIG_ENDIAN_FLAG : 0x00;
1688
1689 set_pixel_conversion(vs);
1690
1691 vga_hw_invalidate();
1692 vga_hw_update();
1693 }
1694
1695 static void pixel_format_message (VncState *vs) {
1696 char pad[3] = { 0, 0, 0 };
1697
1698 vnc_write_u8(vs, vs->ds->surface->pf.bits_per_pixel); /* bits-per-pixel */
1699 vnc_write_u8(vs, vs->ds->surface->pf.depth); /* depth */
1700
1701 #ifdef HOST_WORDS_BIGENDIAN
1702 vnc_write_u8(vs, 1); /* big-endian-flag */
1703 #else
1704 vnc_write_u8(vs, 0); /* big-endian-flag */
1705 #endif
1706 vnc_write_u8(vs, 1); /* true-color-flag */
1707 vnc_write_u16(vs, vs->ds->surface->pf.rmax); /* red-max */
1708 vnc_write_u16(vs, vs->ds->surface->pf.gmax); /* green-max */
1709 vnc_write_u16(vs, vs->ds->surface->pf.bmax); /* blue-max */
1710 vnc_write_u8(vs, vs->ds->surface->pf.rshift); /* red-shift */
1711 vnc_write_u8(vs, vs->ds->surface->pf.gshift); /* green-shift */
1712 vnc_write_u8(vs, vs->ds->surface->pf.bshift); /* blue-shift */
1713
1714 vnc_hextile_set_pixel_conversion(vs, 0);
1715
1716 vs->clientds = *(vs->ds->surface);
1717 vs->clientds.flags &= ~QEMU_ALLOCATED_FLAG;
1718 vs->write_pixels = vnc_write_pixels_copy;
1719
1720 vnc_write(vs, pad, 3); /* padding */
1721 }
1722
1723 static void vnc_dpy_setdata(DisplayState *ds)
1724 {
1725 /* We don't have to do anything */
1726 }
1727
1728 static void vnc_colordepth(VncState *vs)
1729 {
1730 if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) {
1731 /* Sending a WMVi message to notify the client*/
1732 vnc_write_u8(vs, VNC_MSG_SERVER_FRAMEBUFFER_UPDATE);
1733 vnc_write_u8(vs, 0);
1734 vnc_write_u16(vs, 1); /* number of rects */
1735 vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds),
1736 ds_get_height(vs->ds), VNC_ENCODING_WMVi);
1737 pixel_format_message(vs);
1738 vnc_flush(vs);
1739 } else {
1740 set_pixel_conversion(vs);
1741 }
1742 }
1743
1744 static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
1745 {
1746 int i;
1747 uint16_t limit;
1748 VncDisplay *vd = vs->vd;
1749
1750 if (data[0] > 3) {
1751 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
1752 if (!qemu_timer_expired(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval))
1753 qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval);
1754 }
1755
1756 switch (data[0]) {
1757 case VNC_MSG_CLIENT_SET_PIXEL_FORMAT:
1758 if (len == 1)
1759 return 20;
1760
1761 set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5),
1762 read_u8(data, 6), read_u8(data, 7),
1763 read_u16(data, 8), read_u16(data, 10),
1764 read_u16(data, 12), read_u8(data, 14),
1765 read_u8(data, 15), read_u8(data, 16));
1766 break;
1767 case VNC_MSG_CLIENT_SET_ENCODINGS:
1768 if (len == 1)
1769 return 4;
1770
1771 if (len == 4) {
1772 limit = read_u16(data, 2);
1773 if (limit > 0)
1774 return 4 + (limit * 4);
1775 } else
1776 limit = read_u16(data, 2);
1777
1778 for (i = 0; i < limit; i++) {
1779 int32_t val = read_s32(data, 4 + (i * 4));
1780 memcpy(data + 4 + (i * 4), &val, sizeof(val));
1781 }
1782
1783 set_encodings(vs, (int32_t *)(data + 4), limit);
1784 break;
1785 case VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST:
1786 if (len == 1)
1787 return 10;
1788
1789 framebuffer_update_request(vs,
1790 read_u8(data, 1), read_u16(data, 2), read_u16(data, 4),
1791 read_u16(data, 6), read_u16(data, 8));
1792 break;
1793 case VNC_MSG_CLIENT_KEY_EVENT:
1794 if (len == 1)
1795 return 8;
1796
1797 key_event(vs, read_u8(data, 1), read_u32(data, 4));
1798 break;
1799 case VNC_MSG_CLIENT_POINTER_EVENT:
1800 if (len == 1)
1801 return 6;
1802
1803 pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4));
1804 break;
1805 case VNC_MSG_CLIENT_CUT_TEXT:
1806 if (len == 1)
1807 return 8;
1808
1809 if (len == 8) {
1810 uint32_t dlen = read_u32(data, 4);
1811 if (dlen > 0)
1812 return 8 + dlen;
1813 }
1814
1815 client_cut_text(vs, read_u32(data, 4), data + 8);
1816 break;
1817 case VNC_MSG_CLIENT_QEMU:
1818 if (len == 1)
1819 return 2;
1820
1821 switch (read_u8(data, 1)) {
1822 case VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT:
1823 if (len == 2)
1824 return 12;
1825
1826 ext_key_event(vs, read_u16(data, 2),
1827 read_u32(data, 4), read_u32(data, 8));
1828 break;
1829 case VNC_MSG_CLIENT_QEMU_AUDIO:
1830 if (len == 2)
1831 return 4;
1832
1833 switch (read_u16 (data, 2)) {
1834 case VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE:
1835 audio_add(vs);
1836 break;
1837 case VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE:
1838 audio_del(vs);
1839 break;
1840 case VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT:
1841 if (len == 4)
1842 return 10;
1843 switch (read_u8(data, 4)) {
1844 case 0: vs->as.fmt = AUD_FMT_U8; break;
1845 case 1: vs->as.fmt = AUD_FMT_S8; break;
1846 case 2: vs->as.fmt = AUD_FMT_U16; break;
1847 case 3: vs->as.fmt = AUD_FMT_S16; break;
1848 case 4: vs->as.fmt = AUD_FMT_U32; break;
1849 case 5: vs->as.fmt = AUD_FMT_S32; break;
1850 default:
1851 printf("Invalid audio format %d\n", read_u8(data, 4));
1852 vnc_client_error(vs);
1853 break;
1854 }
1855 vs->as.nchannels = read_u8(data, 5);
1856 if (vs->as.nchannels != 1 && vs->as.nchannels != 2) {
1857 printf("Invalid audio channel coount %d\n",
1858 read_u8(data, 5));
1859 vnc_client_error(vs);
1860 break;
1861 }
1862 vs->as.freq = read_u32(data, 6);
1863 break;
1864 default:
1865 printf ("Invalid audio message %d\n", read_u8(data, 4));
1866 vnc_client_error(vs);
1867 break;
1868 }
1869 break;
1870
1871 default:
1872 printf("Msg: %d\n", read_u16(data, 0));
1873 vnc_client_error(vs);
1874 break;
1875 }
1876 break;
1877 default:
1878 printf("Msg: %d\n", data[0]);
1879 vnc_client_error(vs);
1880 break;
1881 }
1882
1883 vnc_read_when(vs, protocol_client_msg, 1);
1884 return 0;
1885 }
1886
1887 static int protocol_client_init(VncState *vs, uint8_t *data, size_t len)
1888 {
1889 char buf[1024];
1890 int size;
1891
1892 vnc_write_u16(vs, ds_get_width(vs->ds));
1893 vnc_write_u16(vs, ds_get_height(vs->ds));
1894
1895 pixel_format_message(vs);
1896
1897 if (qemu_name)
1898 size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name);
1899 else
1900 size = snprintf(buf, sizeof(buf), "QEMU");
1901
1902 vnc_write_u32(vs, size);
1903 vnc_write(vs, buf, size);
1904 vnc_flush(vs);
1905
1906 vnc_client_cache_auth(vs);
1907 vnc_qmp_event(vs, QEVENT_VNC_INITIALIZED);
1908
1909 vnc_read_when(vs, protocol_client_msg, 1);
1910
1911 return 0;
1912 }
1913
1914 void start_client_init(VncState *vs)
1915 {
1916 vnc_read_when(vs, protocol_client_init, 1);
1917 }
1918
1919 static void make_challenge(VncState *vs)
1920 {
1921 int i;
1922
1923 srand(time(NULL)+getpid()+getpid()*987654+rand());
1924
1925 for (i = 0 ; i < sizeof(vs->challenge) ; i++)
1926 vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0));
1927 }
1928
1929 static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
1930 {
1931 unsigned char response[VNC_AUTH_CHALLENGE_SIZE];
1932 int i, j, pwlen;
1933 unsigned char key[8];
1934
1935 if (!vs->vd->password || !vs->vd->password[0]) {
1936 VNC_DEBUG("No password configured on server");
1937 vnc_write_u32(vs, 1); /* Reject auth */
1938 if (vs->minor >= 8) {
1939 static const char err[] = "Authentication failed";
1940 vnc_write_u32(vs, sizeof(err));
1941 vnc_write(vs, err, sizeof(err));
1942 }
1943 vnc_flush(vs);
1944 vnc_client_error(vs);
1945 return 0;
1946 }
1947
1948 memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE);
1949
1950 /* Calculate the expected challenge response */
1951 pwlen = strlen(vs->vd->password);
1952 for (i=0; i<sizeof(key); i++)
1953 key[i] = i<pwlen ? vs->vd->password[i] : 0;
1954 deskey(key, EN0);
1955 for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8)
1956 des(response+j, response+j);
1957
1958 /* Compare expected vs actual challenge response */
1959 if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) {
1960 VNC_DEBUG("Client challenge reponse did not match\n");
1961 vnc_write_u32(vs, 1); /* Reject auth */
1962 if (vs->minor >= 8) {
1963 static const char err[] = "Authentication failed";
1964 vnc_write_u32(vs, sizeof(err));
1965 vnc_write(vs, err, sizeof(err));
1966 }
1967 vnc_flush(vs);
1968 vnc_client_error(vs);
1969 } else {
1970 VNC_DEBUG("Accepting VNC challenge response\n");
1971 vnc_write_u32(vs, 0); /* Accept auth */
1972 vnc_flush(vs);
1973
1974 start_client_init(vs);
1975 }
1976 return 0;
1977 }
1978
1979 void start_auth_vnc(VncState *vs)
1980 {
1981 make_challenge(vs);
1982 /* Send client a 'random' challenge */
1983 vnc_write(vs, vs->challenge, sizeof(vs->challenge));
1984 vnc_flush(vs);
1985
1986 vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
1987 }
1988
1989
1990 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
1991 {
1992 /* We only advertise 1 auth scheme at a time, so client
1993 * must pick the one we sent. Verify this */
1994 if (data[0] != vs->vd->auth) { /* Reject auth */
1995 VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]);
1996 vnc_write_u32(vs, 1);
1997 if (vs->minor >= 8) {
1998 static const char err[] = "Authentication failed";
1999 vnc_write_u32(vs, sizeof(err));
2000 vnc_write(vs, err, sizeof(err));
2001 }
2002 vnc_client_error(vs);
2003 } else { /* Accept requested auth */
2004 VNC_DEBUG("Client requested auth %d\n", (int)data[0]);
2005 switch (vs->vd->auth) {
2006 case VNC_AUTH_NONE:
2007 VNC_DEBUG("Accept auth none\n");
2008 if (vs->minor >= 8) {
2009 vnc_write_u32(vs, 0); /* Accept auth completion */
2010 vnc_flush(vs);
2011 }
2012 start_client_init(vs);
2013 break;
2014
2015 case VNC_AUTH_VNC:
2016 VNC_DEBUG("Start VNC auth\n");
2017 start_auth_vnc(vs);
2018 break;
2019
2020 #ifdef CONFIG_VNC_TLS
2021 case VNC_AUTH_VENCRYPT:
2022 VNC_DEBUG("Accept VeNCrypt auth\n");;
2023 start_auth_vencrypt(vs);
2024 break;
2025 #endif /* CONFIG_VNC_TLS */
2026
2027 #ifdef CONFIG_VNC_SASL
2028 case VNC_AUTH_SASL:
2029 VNC_DEBUG("Accept SASL auth\n");
2030 start_auth_sasl(vs);
2031 break;
2032 #endif /* CONFIG_VNC_SASL */
2033
2034 default: /* Should not be possible, but just in case */
2035 VNC_DEBUG("Reject auth %d server code bug\n", vs->vd->auth);
2036 vnc_write_u8(vs, 1);
2037 if (vs->minor >= 8) {
2038 static const char err[] = "Authentication failed";
2039 vnc_write_u32(vs, sizeof(err));
2040 vnc_write(vs, err, sizeof(err));
2041 }
2042 vnc_client_error(vs);
2043 }
2044 }
2045 return 0;
2046 }
2047
2048 static int protocol_version(VncState *vs, uint8_t *version, size_t len)
2049 {
2050 char local[13];
2051
2052 memcpy(local, version, 12);
2053 local[12] = 0;
2054
2055 if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) {
2056 VNC_DEBUG("Malformed protocol version %s\n", local);
2057 vnc_client_error(vs);
2058 return 0;
2059 }
2060 VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor);
2061 if (vs->major != 3 ||
2062 (vs->minor != 3 &&
2063 vs->minor != 4 &&
2064 vs->minor != 5 &&
2065 vs->minor != 7 &&
2066 vs->minor != 8)) {
2067 VNC_DEBUG("Unsupported client version\n");
2068 vnc_write_u32(vs, VNC_AUTH_INVALID);
2069 vnc_flush(vs);
2070 vnc_client_error(vs);
2071 return 0;
2072 }
2073 /* Some broken clients report v3.4 or v3.5, which spec requires to be treated
2074 * as equivalent to v3.3 by servers
2075 */
2076 if (vs->minor == 4 || vs->minor == 5)
2077 vs->minor = 3;
2078
2079 if (vs->minor == 3) {
2080 if (vs->vd->auth == VNC_AUTH_NONE) {
2081 VNC_DEBUG("Tell client auth none\n");
2082 vnc_write_u32(vs, vs->vd->auth);
2083 vnc_flush(vs);
2084 start_client_init(vs);
2085 } else if (vs->vd->auth == VNC_AUTH_VNC) {
2086 VNC_DEBUG("Tell client VNC auth\n");
2087 vnc_write_u32(vs, vs->vd->auth);
2088 vnc_flush(vs);
2089 start_auth_vnc(vs);
2090 } else {
2091 VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->vd->auth);
2092 vnc_write_u32(vs, VNC_AUTH_INVALID);
2093 vnc_flush(vs);
2094 vnc_client_error(vs);
2095 }
2096 } else {
2097 VNC_DEBUG("Telling client we support auth %d\n", vs->vd->auth);
2098 vnc_write_u8(vs, 1); /* num auth */
2099 vnc_write_u8(vs, vs->vd->auth);
2100 vnc_read_when(vs, protocol_client_auth, 1);
2101 vnc_flush(vs);
2102 }
2103
2104 return 0;
2105 }
2106
2107 static int vnc_refresh_server_surface(VncDisplay *vd)
2108 {
2109 int y;
2110 uint8_t *guest_row;
2111 uint8_t *server_row;
2112 int cmp_bytes;
2113 uint32_t width_mask[VNC_DIRTY_WORDS];
2114 VncState *vs;
2115 int has_dirty = 0;
2116
2117 /*
2118 * Walk through the guest dirty map.
2119 * Check and copy modified bits from guest to server surface.
2120 * Update server dirty map.
2121 */
2122 vnc_set_bits(width_mask, (ds_get_width(vd->ds) / 16), VNC_DIRTY_WORDS);
2123 cmp_bytes = 16 * ds_get_bytes_per_pixel(vd->ds);
2124 guest_row = vd->guest.ds->data;
2125 server_row = vd->server->data;
2126 for (y = 0; y < vd->guest.ds->height; y++) {
2127 if (vnc_and_bits(vd->guest.dirty[y], width_mask, VNC_DIRTY_WORDS)) {
2128 int x;
2129 uint8_t *guest_ptr;
2130 uint8_t *server_ptr;
2131
2132 guest_ptr = guest_row;
2133 server_ptr = server_row;
2134
2135 for (x = 0; x < vd->guest.ds->width;
2136 x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) {
2137 if (!vnc_get_bit(vd->guest.dirty[y], (x / 16)))
2138 continue;
2139 vnc_clear_bit(vd->guest.dirty[y], (x / 16));
2140 if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0)
2141 continue;
2142 memcpy(server_ptr, guest_ptr, cmp_bytes);
2143 QTAILQ_FOREACH(vs, &vd->clients, next) {
2144 vnc_set_bit(vs->dirty[y], (x / 16));
2145 }
2146 has_dirty++;
2147 }
2148 }
2149 guest_row += ds_get_linesize(vd->ds);
2150 server_row += ds_get_linesize(vd->ds);
2151 }
2152 return has_dirty;
2153 }
2154
2155 static void vnc_refresh(void *opaque)
2156 {
2157 VncDisplay *vd = opaque;
2158 VncState *vs, *vn;
2159 int has_dirty, rects = 0;
2160
2161 vga_hw_update();
2162
2163 has_dirty = vnc_refresh_server_surface(vd);
2164
2165 QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) {
2166 rects += vnc_update_client(vs, has_dirty);
2167 /* vs might be free()ed here */
2168 }
2169 /* vd->timer could be NULL now if the last client disconnected,
2170 * in this case don't update the timer */
2171 if (vd->timer == NULL)
2172 return;
2173
2174 if (has_dirty && rects) {
2175 vd->timer_interval /= 2;
2176 if (vd->timer_interval < VNC_REFRESH_INTERVAL_BASE)
2177 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2178 } else {
2179 vd->timer_interval += VNC_REFRESH_INTERVAL_INC;
2180 if (vd->timer_interval > VNC_REFRESH_INTERVAL_MAX)
2181 vd->timer_interval = VNC_REFRESH_INTERVAL_MAX;
2182 }
2183 qemu_mod_timer(vd->timer, qemu_get_clock(rt_clock) + vd->timer_interval);
2184 }
2185
2186 static void vnc_init_timer(VncDisplay *vd)
2187 {
2188 vd->timer_interval = VNC_REFRESH_INTERVAL_BASE;
2189 if (vd->timer == NULL && !QTAILQ_EMPTY(&vd->clients)) {
2190 vd->timer = qemu_new_timer(rt_clock, vnc_refresh, vd);
2191 vnc_refresh(vd);
2192 }
2193 }
2194
2195 static void vnc_remove_timer(VncDisplay *vd)
2196 {
2197 if (vd->timer != NULL && QTAILQ_EMPTY(&vd->clients)) {
2198 qemu_del_timer(vd->timer);
2199 qemu_free_timer(vd->timer);
2200 vd->timer = NULL;
2201 }
2202 }
2203
2204 static void vnc_connect(VncDisplay *vd, int csock)
2205 {
2206 VncState *vs = qemu_mallocz(sizeof(VncState));
2207 vs->csock = csock;
2208
2209 VNC_DEBUG("New client on socket %d\n", csock);
2210 dcl->idle = 0;
2211 socket_set_nonblock(vs->csock);
2212 qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs);
2213
2214 vnc_client_cache_addr(vs);
2215 vnc_qmp_event(vs, QEVENT_VNC_CONNECTED);
2216
2217 vs->vd = vd;
2218 vs->ds = vd->ds;
2219 vs->last_x = -1;
2220 vs->last_y = -1;
2221
2222 vs->as.freq = 44100;
2223 vs->as.nchannels = 2;
2224 vs->as.fmt = AUD_FMT_S16;
2225 vs->as.endianness = 0;
2226
2227 QTAILQ_INSERT_HEAD(&vd->clients, vs, next);
2228
2229 vga_hw_update();
2230
2231 vnc_write(vs, "RFB 003.008\n", 12);
2232 vnc_flush(vs);
2233 vnc_read_when(vs, protocol_version, 12);
2234 reset_keys(vs);
2235 if (vs->vd->lock_key_sync)
2236 vs->led = qemu_add_led_event_handler(kbd_leds, vs);
2237
2238 vs->mouse_mode_notifier.notify = check_pointer_type_change;
2239 qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
2240
2241 vnc_init_timer(vd);
2242
2243 /* vs might be free()ed here */
2244 }
2245
2246 static void vnc_listen_read(void *opaque)
2247 {
2248 VncDisplay *vs = opaque;
2249 struct sockaddr_in addr;
2250 socklen_t addrlen = sizeof(addr);
2251
2252 /* Catch-up */
2253 vga_hw_update();
2254
2255 int csock = qemu_accept(vs->lsock, (struct sockaddr *)&addr, &addrlen);
2256 if (csock != -1) {
2257 vnc_connect(vs, csock);
2258 }
2259 }
2260
2261 void vnc_display_init(DisplayState *ds)
2262 {
2263 VncDisplay *vs = qemu_mallocz(sizeof(*vs));
2264
2265 dcl = qemu_mallocz(sizeof(DisplayChangeListener));
2266
2267 ds->opaque = vs;
2268 dcl->idle = 1;
2269 vnc_display = vs;
2270
2271 vs->lsock = -1;
2272
2273 vs->ds = ds;
2274 QTAILQ_INIT(&vs->clients);
2275
2276 if (keyboard_layout)
2277 vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
2278 else
2279 vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us");
2280
2281 if (!vs->kbd_layout)
2282 exit(1);
2283
2284 dcl->dpy_copy = vnc_dpy_copy;
2285 dcl->dpy_update = vnc_dpy_update;
2286 dcl->dpy_resize = vnc_dpy_resize;
2287 dcl->dpy_setdata = vnc_dpy_setdata;
2288 register_displaychangelistener(ds, dcl);
2289 }
2290
2291
2292 void vnc_display_close(DisplayState *ds)
2293 {
2294 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2295
2296 if (!vs)
2297 return;
2298 if (vs->display) {
2299 qemu_free(vs->display);
2300 vs->display = NULL;
2301 }
2302 if (vs->lsock != -1) {
2303 qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
2304 close(vs->lsock);
2305 vs->lsock = -1;
2306 }
2307 vs->auth = VNC_AUTH_INVALID;
2308 #ifdef CONFIG_VNC_TLS
2309 vs->subauth = VNC_AUTH_INVALID;
2310 vs->tls.x509verify = 0;
2311 #endif
2312 }
2313
2314 int vnc_display_password(DisplayState *ds, const char *password)
2315 {
2316 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2317
2318 if (!vs) {
2319 return -1;
2320 }
2321
2322 if (vs->password) {
2323 qemu_free(vs->password);
2324 vs->password = NULL;
2325 }
2326 if (password && password[0]) {
2327 if (!(vs->password = qemu_strdup(password)))
2328 return -1;
2329 if (vs->auth == VNC_AUTH_NONE) {
2330 vs->auth = VNC_AUTH_VNC;
2331 }
2332 } else {
2333 vs->auth = VNC_AUTH_NONE;
2334 }
2335
2336 return 0;
2337 }
2338
2339 char *vnc_display_local_addr(DisplayState *ds)
2340 {
2341 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2342
2343 return vnc_socket_local_addr("%s:%s", vs->lsock);
2344 }
2345
2346 int vnc_display_open(DisplayState *ds, const char *display)
2347 {
2348 VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
2349 const char *options;
2350 int password = 0;
2351 int reverse = 0;
2352 #ifdef CONFIG_VNC_TLS
2353 int tls = 0, x509 = 0;
2354 #endif
2355 #ifdef CONFIG_VNC_SASL
2356 int sasl = 0;
2357 int saslErr;
2358 #endif
2359 int acl = 0;
2360 int lock_key_sync = 1;
2361
2362 if (!vnc_display)
2363 return -1;
2364 vnc_display_close(ds);
2365 if (strcmp(display, "none") == 0)
2366 return 0;
2367
2368 if (!(vs->display = strdup(display)))
2369 return -1;
2370
2371 options = display;
2372 while ((options = strchr(options, ','))) {
2373 options++;
2374 if (strncmp(options, "password", 8) == 0) {
2375 password = 1; /* Require password auth */
2376 } else if (strncmp(options, "reverse", 7) == 0) {
2377 reverse = 1;
2378 } else if (strncmp(options, "no-lock-key-sync", 9) == 0) {
2379 lock_key_sync = 0;
2380 #ifdef CONFIG_VNC_SASL
2381 } else if (strncmp(options, "sasl", 4) == 0) {
2382 sasl = 1; /* Require SASL auth */
2383 #endif
2384 #ifdef CONFIG_VNC_TLS
2385 } else if (strncmp(options, "tls", 3) == 0) {
2386 tls = 1; /* Require TLS */
2387 } else if (strncmp(options, "x509", 4) == 0) {
2388 char *start, *end;
2389 x509 = 1; /* Require x509 certificates */
2390 if (strncmp(options, "x509verify", 10) == 0)
2391 vs->tls.x509verify = 1; /* ...and verify client certs */
2392
2393 /* Now check for 'x509=/some/path' postfix
2394 * and use that to setup x509 certificate/key paths */
2395 start = strchr(options, '=');
2396 end = strchr(options, ',');
2397 if (start && (!end || (start < end))) {
2398 int len = end ? end-(start+1) : strlen(start+1);
2399 char *path = qemu_strndup(start + 1, len);
2400
2401 VNC_DEBUG("Trying certificate path '%s'\n", path);
2402 if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
2403 fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
2404 qemu_free(path);
2405 qemu_free(vs->display);
2406 vs->display = NULL;
2407 return -1;
2408 }
2409 qemu_free(path);
2410 } else {
2411 fprintf(stderr, "No certificate path provided\n");
2412 qemu_free(vs->display);
2413 vs->display = NULL;
2414 return -1;
2415 }
2416 #endif
2417 } else if (strncmp(options, "acl", 3) == 0) {
2418 acl = 1;
2419 }
2420 }
2421
2422 #ifdef CONFIG_VNC_TLS
2423 if (acl && x509 && vs->tls.x509verify) {
2424 if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) {
2425 fprintf(stderr, "Failed to create x509 dname ACL\n");
2426 exit(1);
2427 }
2428 }
2429 #endif
2430 #ifdef CONFIG_VNC_SASL
2431 if (acl && sasl) {
2432 if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) {
2433 fprintf(stderr, "Failed to create username ACL\n");
2434 exit(1);
2435 }
2436 }
2437 #endif
2438
2439 /*
2440 * Combinations we support here:
2441 *
2442 * - no-auth (clear text, no auth)
2443 * - password (clear text, weak auth)
2444 * - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI)
2445 * - tls (encrypt, weak anonymous creds, no auth)
2446 * - tls + password (encrypt, weak anonymous creds, weak auth)
2447 * - tls + sasl (encrypt, weak anonymous creds, good auth)
2448 * - tls + x509 (encrypt, good x509 creds, no auth)
2449 * - tls + x509 + password (encrypt, good x509 creds, weak auth)
2450 * - tls + x509 + sasl (encrypt, good x509 creds, good auth)
2451 *
2452 * NB1. TLS is a stackable auth scheme.
2453 * NB2. the x509 schemes have option to validate a client cert dname
2454 */
2455 if (password) {
2456 #ifdef CONFIG_VNC_TLS
2457 if (tls) {
2458 vs->auth = VNC_AUTH_VENCRYPT;
2459 if (x509) {
2460 VNC_DEBUG("Initializing VNC server with x509 password auth\n");
2461 vs->subauth = VNC_AUTH_VENCRYPT_X509VNC;
2462 } else {
2463 VNC_DEBUG("Initializing VNC server with TLS password auth\n");
2464 vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
2465 }
2466 } else {
2467 #endif /* CONFIG_VNC_TLS */
2468 VNC_DEBUG("Initializing VNC server with password auth\n");
2469 vs->auth = VNC_AUTH_VNC;
2470 #ifdef CONFIG_VNC_TLS
2471 vs->subauth = VNC_AUTH_INVALID;
2472 }
2473 #endif /* CONFIG_VNC_TLS */
2474 #ifdef CONFIG_VNC_SASL
2475 } else if (sasl) {
2476 #ifdef CONFIG_VNC_TLS
2477 if (tls) {
2478 vs->auth = VNC_AUTH_VENCRYPT;
2479 if (x509) {
2480 VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
2481 vs->subauth = VNC_AUTH_VENCRYPT_X509SASL;
2482 } else {
2483 VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
2484 vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
2485 }
2486 } else {
2487 #endif /* CONFIG_VNC_TLS */
2488 VNC_DEBUG("Initializing VNC server with SASL auth\n");
2489 vs->auth = VNC_AUTH_SASL;
2490 #ifdef CONFIG_VNC_TLS
2491 vs->subauth = VNC_AUTH_INVALID;
2492 }
2493 #endif /* CONFIG_VNC_TLS */
2494 #endif /* CONFIG_VNC_SASL */
2495 } else {
2496 #ifdef CONFIG_VNC_TLS
2497 if (tls) {
2498 vs->auth = VNC_AUTH_VENCRYPT;
2499 if (x509) {
2500 VNC_DEBUG("Initializing VNC server with x509 no auth\n");
2501 vs->subauth = VNC_AUTH_VENCRYPT_X509NONE;
2502 } else {
2503 VNC_DEBUG("Initializing VNC server with TLS no auth\n");
2504 vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
2505 }
2506 } else {
2507 #endif
2508 VNC_DEBUG("Initializing VNC server with no auth\n");
2509 vs->auth = VNC_AUTH_NONE;
2510 #ifdef CONFIG_VNC_TLS
2511 vs->subauth = VNC_AUTH_INVALID;
2512 }
2513 #endif
2514 }
2515
2516 #ifdef CONFIG_VNC_SASL
2517 if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
2518 fprintf(stderr, "Failed to initialize SASL auth %s",
2519 sasl_errstring(saslErr, NULL, NULL));
2520 free(vs->display);
2521 vs->display = NULL;
2522 return -1;
2523 }
2524 #endif
2525 vs->lock_key_sync = lock_key_sync;
2526
2527 if (reverse) {
2528 /* connect to viewer */
2529 if (strncmp(display, "unix:", 5) == 0)
2530 vs->lsock = unix_connect(display+5);
2531 else
2532 vs->lsock = inet_connect(display, SOCK_STREAM);
2533 if (-1 == vs->lsock) {
2534 free(vs->display);
2535 vs->display = NULL;
2536 return -1;
2537 } else {
2538 int csock = vs->lsock;
2539 vs->lsock = -1;
2540 vnc_connect(vs, csock);
2541 }
2542 return 0;
2543
2544 } else {
2545 /* listen for connects */
2546 char *dpy;
2547 dpy = qemu_malloc(256);
2548 if (strncmp(display, "unix:", 5) == 0) {
2549 pstrcpy(dpy, 256, "unix:");
2550 vs->lsock = unix_listen(display+5, dpy+5, 256-5);
2551 } else {
2552 vs->lsock = inet_listen(display, dpy, 256, SOCK_STREAM, 5900);
2553 }
2554 if (-1 == vs->lsock) {
2555 free(dpy);
2556 return -1;
2557 } else {
2558 free(vs->display);
2559 vs->display = dpy;
2560 }
2561 }
2562 return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs);
2563 }
Anthony Liguori's QEMU queue