David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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 | |
| 33 | #define VNC_REFRESH_INTERVAL (1000 / 30) |
| 34 | |
| 35 | #include "vnc_keysym.h" |
| 36 | #include "d3des.h" |
| 37 | |
| 38 | #define count_bits(c, v) { \ |
| 39 | for (c = 0; v; v >>= 1) \ |
| 40 | { \ |
| 41 | c += v & 1; \ |
| 42 | } \ |
| 43 | } |
| 44 | |
| 45 | |
| 46 | static VncDisplay *vnc_display; /* needed for info vnc */ |
| 47 | static DisplayChangeListener *dcl; |
| 48 | |
| 49 | static char *addr_to_string(const char *format, SockAddress* sa) |
| 50 | { |
| 51 | char *addr; |
| 52 | char host[256]; |
| 53 | char serv[32]; |
| 54 | int err; |
| 55 | size_t addrlen; |
| 56 | |
| 57 | #if 1 /* ANDROID */ |
| 58 | err = sock_address_get_numeric_info (sa, host, sizeof(host), |
| 59 | serv, sizeof(serv)); |
| 60 | if (err != 0) { |
| 61 | VNC_DEBUG("Cannot resolve address '%s': %s\n", |
| 62 | sock_address_to_string(sa), errno_str); |
| 63 | return NULL; |
| 64 | } |
| 65 | #else |
| 66 | if ((err = getnameinfo((struct sockaddr *)sa, salen, |
| 67 | host, sizeof(host), |
| 68 | serv, sizeof(serv), |
| 69 | NI_NUMERICHOST | NI_NUMERICSERV)) != 0) { |
| 70 | VNC_DEBUG("Cannot resolve address %d: %s\n", |
| 71 | err, gai_strerror(err)); |
| 72 | return NULL; |
| 73 | } |
| 74 | #endif |
| 75 | |
| 76 | /* Enough for the existing format + the 2 vars we're |
| 77 | * substituting in. */ |
| 78 | addrlen = strlen(format) + strlen(host) + strlen(serv); |
| 79 | addr = qemu_malloc(addrlen + 1); |
| 80 | snprintf(addr, addrlen, format, host, serv); |
| 81 | addr[addrlen] = '\0'; |
| 82 | |
| 83 | return addr; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | char *vnc_socket_local_addr(const char *format, int fd) { |
| 88 | SockAddress sa; |
| 89 | |
| 90 | if (socket_get_address(fd, &sa) < 0) |
| 91 | return NULL; |
| 92 | |
| 93 | return addr_to_string(format, &sa); |
| 94 | } |
| 95 | |
| 96 | |
| 97 | char *vnc_socket_remote_addr(const char *format, int fd) { |
| 98 | SockAddress sa; |
| 99 | |
| 100 | if (socket_get_peer_address(fd, &sa) < 0) |
| 101 | return NULL; |
| 102 | |
| 103 | return addr_to_string(format, &sa); |
| 104 | } |
| 105 | |
| 106 | static const char *vnc_auth_name(VncDisplay *vd) { |
| 107 | switch (vd->auth) { |
| 108 | case VNC_AUTH_INVALID: |
| 109 | return "invalid"; |
| 110 | case VNC_AUTH_NONE: |
| 111 | return "none"; |
| 112 | case VNC_AUTH_VNC: |
| 113 | return "vnc"; |
| 114 | case VNC_AUTH_RA2: |
| 115 | return "ra2"; |
| 116 | case VNC_AUTH_RA2NE: |
| 117 | return "ra2ne"; |
| 118 | case VNC_AUTH_TIGHT: |
| 119 | return "tight"; |
| 120 | case VNC_AUTH_ULTRA: |
| 121 | return "ultra"; |
| 122 | case VNC_AUTH_TLS: |
| 123 | return "tls"; |
| 124 | case VNC_AUTH_VENCRYPT: |
| 125 | #ifdef CONFIG_VNC_TLS |
| 126 | switch (vd->subauth) { |
| 127 | case VNC_AUTH_VENCRYPT_PLAIN: |
| 128 | return "vencrypt+plain"; |
| 129 | case VNC_AUTH_VENCRYPT_TLSNONE: |
| 130 | return "vencrypt+tls+none"; |
| 131 | case VNC_AUTH_VENCRYPT_TLSVNC: |
| 132 | return "vencrypt+tls+vnc"; |
| 133 | case VNC_AUTH_VENCRYPT_TLSPLAIN: |
| 134 | return "vencrypt+tls+plain"; |
| 135 | case VNC_AUTH_VENCRYPT_X509NONE: |
| 136 | return "vencrypt+x509+none"; |
| 137 | case VNC_AUTH_VENCRYPT_X509VNC: |
| 138 | return "vencrypt+x509+vnc"; |
| 139 | case VNC_AUTH_VENCRYPT_X509PLAIN: |
| 140 | return "vencrypt+x509+plain"; |
| 141 | case VNC_AUTH_VENCRYPT_TLSSASL: |
| 142 | return "vencrypt+tls+sasl"; |
| 143 | case VNC_AUTH_VENCRYPT_X509SASL: |
| 144 | return "vencrypt+x509+sasl"; |
| 145 | default: |
| 146 | return "vencrypt"; |
| 147 | } |
| 148 | #else |
| 149 | return "vencrypt"; |
| 150 | #endif |
| 151 | case VNC_AUTH_SASL: |
| 152 | return "sasl"; |
| 153 | } |
| 154 | return "unknown"; |
| 155 | } |
| 156 | |
| 157 | static void do_info_vnc_client(Monitor *mon, VncState *client) |
| 158 | { |
| 159 | char *clientAddr = |
| 160 | vnc_socket_remote_addr(" address: %s:%s\n", |
| 161 | client->csock); |
| 162 | if (!clientAddr) |
| 163 | return; |
| 164 | |
| 165 | monitor_printf(mon, "Client:\n"); |
| 166 | monitor_printf(mon, "%s", clientAddr); |
| 167 | free(clientAddr); |
| 168 | |
| 169 | #ifdef CONFIG_VNC_TLS |
| 170 | if (client->tls.session && |
| 171 | client->tls.dname) |
| 172 | monitor_printf(mon, " x509 dname: %s\n", client->tls.dname); |
| 173 | else |
| 174 | monitor_printf(mon, " x509 dname: none\n"); |
| 175 | #endif |
| 176 | #ifdef CONFIG_VNC_SASL |
| 177 | if (client->sasl.conn && |
| 178 | client->sasl.username) |
| 179 | monitor_printf(mon, " username: %s\n", client->sasl.username); |
| 180 | else |
| 181 | monitor_printf(mon, " username: none\n"); |
| 182 | #endif |
| 183 | } |
| 184 | |
| 185 | void do_info_vnc(Monitor *mon) |
| 186 | { |
| 187 | if (vnc_display == NULL || vnc_display->display == NULL) { |
| 188 | monitor_printf(mon, "Server: disabled\n"); |
| 189 | } else { |
| 190 | char *serverAddr = vnc_socket_local_addr(" address: %s:%s\n", |
| 191 | vnc_display->lsock); |
| 192 | |
| 193 | if (!serverAddr) |
| 194 | return; |
| 195 | |
| 196 | monitor_printf(mon, "Server:\n"); |
| 197 | monitor_printf(mon, "%s", serverAddr); |
| 198 | free(serverAddr); |
| 199 | monitor_printf(mon, " auth: %s\n", vnc_auth_name(vnc_display)); |
| 200 | |
| 201 | if (vnc_display->clients) { |
| 202 | VncState *client = vnc_display->clients; |
| 203 | while (client) { |
| 204 | do_info_vnc_client(mon, client); |
| 205 | client = client->next; |
| 206 | } |
| 207 | } else { |
| 208 | monitor_printf(mon, "Client: none\n"); |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | static inline uint32_t vnc_has_feature(VncState *vs, int feature) { |
| 214 | return (vs->features & (1 << feature)); |
| 215 | } |
| 216 | |
| 217 | /* TODO |
| 218 | 1) Get the queue working for IO. |
| 219 | 2) there is some weirdness when using the -S option (the screen is grey |
| 220 | and not totally invalidated |
| 221 | 3) resolutions > 1024 |
| 222 | */ |
| 223 | |
| 224 | static void vnc_update_client(void *opaque); |
| 225 | static void vnc_disconnect_start(VncState *vs); |
| 226 | static void vnc_disconnect_finish(VncState *vs); |
| 227 | |
| 228 | static void vnc_colordepth(VncState *vs); |
| 229 | |
| 230 | static inline void vnc_set_bit(uint32_t *d, int k) |
| 231 | { |
| 232 | d[k >> 5] |= 1 << (k & 0x1f); |
| 233 | } |
| 234 | |
| 235 | static inline void vnc_clear_bit(uint32_t *d, int k) |
| 236 | { |
| 237 | d[k >> 5] &= ~(1 << (k & 0x1f)); |
| 238 | } |
| 239 | |
| 240 | static inline void vnc_set_bits(uint32_t *d, int n, int nb_words) |
| 241 | { |
| 242 | int j; |
| 243 | |
| 244 | j = 0; |
| 245 | while (n >= 32) { |
| 246 | d[j++] = -1; |
| 247 | n -= 32; |
| 248 | } |
| 249 | if (n > 0) |
| 250 | d[j++] = (1 << n) - 1; |
| 251 | while (j < nb_words) |
| 252 | d[j++] = 0; |
| 253 | } |
| 254 | |
| 255 | static inline int vnc_get_bit(const uint32_t *d, int k) |
| 256 | { |
| 257 | return (d[k >> 5] >> (k & 0x1f)) & 1; |
| 258 | } |
| 259 | |
| 260 | static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2, |
| 261 | int nb_words) |
| 262 | { |
| 263 | int i; |
| 264 | for(i = 0; i < nb_words; i++) { |
| 265 | if ((d1[i] & d2[i]) != 0) |
| 266 | return 1; |
| 267 | } |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static void vnc_update(VncState *vs, int x, int y, int w, int h) |
| 272 | { |
| 273 | struct VncSurface *s = &vs->guest; |
| 274 | int i; |
| 275 | |
| 276 | h += y; |
| 277 | |
| 278 | /* round x down to ensure the loop only spans one 16-pixel block per, |
| 279 | iteration. otherwise, if (x % 16) != 0, the last iteration may span |
| 280 | two 16-pixel blocks but we only mark the first as dirty |
| 281 | */ |
| 282 | w += (x % 16); |
| 283 | x -= (x % 16); |
| 284 | |
| 285 | x = MIN(x, s->ds->width); |
| 286 | y = MIN(y, s->ds->height); |
| 287 | w = MIN(x + w, s->ds->width) - x; |
| 288 | h = MIN(h, s->ds->height); |
| 289 | |
| 290 | for (; y < h; y++) |
| 291 | for (i = 0; i < w; i += 16) |
| 292 | vnc_set_bit(s->dirty[y], (x + i) / 16); |
| 293 | } |
| 294 | |
| 295 | static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h) |
| 296 | { |
| 297 | VncDisplay *vd = ds->opaque; |
| 298 | VncState *vs = vd->clients; |
| 299 | while (vs != NULL) { |
| 300 | vnc_update(vs, x, y, w, h); |
| 301 | vs = vs->next; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | static void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, |
| 306 | int32_t encoding) |
| 307 | { |
| 308 | vnc_write_u16(vs, x); |
| 309 | vnc_write_u16(vs, y); |
| 310 | vnc_write_u16(vs, w); |
| 311 | vnc_write_u16(vs, h); |
| 312 | |
| 313 | vnc_write_s32(vs, encoding); |
| 314 | } |
| 315 | |
| 316 | void buffer_reserve(Buffer *buffer, size_t len) |
| 317 | { |
| 318 | if ((buffer->capacity - buffer->offset) < len) { |
| 319 | buffer->capacity += (len + 1024); |
| 320 | buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity); |
| 321 | if (buffer->buffer == NULL) { |
| 322 | fprintf(stderr, "vnc: out of memory\n"); |
| 323 | exit(1); |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | int buffer_empty(Buffer *buffer) |
| 329 | { |
| 330 | return buffer->offset == 0; |
| 331 | } |
| 332 | |
| 333 | uint8_t *buffer_end(Buffer *buffer) |
| 334 | { |
| 335 | return buffer->buffer + buffer->offset; |
| 336 | } |
| 337 | |
| 338 | void buffer_reset(Buffer *buffer) |
| 339 | { |
| 340 | buffer->offset = 0; |
| 341 | } |
| 342 | |
| 343 | void buffer_append(Buffer *buffer, const void *data, size_t len) |
| 344 | { |
| 345 | memcpy(buffer->buffer + buffer->offset, data, len); |
| 346 | buffer->offset += len; |
| 347 | } |
| 348 | |
| 349 | static void vnc_resize(VncState *vs) |
| 350 | { |
| 351 | DisplayState *ds = vs->ds; |
| 352 | int size_changed; |
| 353 | |
| 354 | /* guest surface */ |
| 355 | if (!vs->guest.ds) |
| 356 | vs->guest.ds = qemu_mallocz(sizeof(*vs->guest.ds)); |
| 357 | if (ds_get_bytes_per_pixel(ds) != vs->guest.ds->pf.bytes_per_pixel) |
| 358 | console_color_init(ds); |
| 359 | vnc_colordepth(vs); |
| 360 | size_changed = ds_get_width(ds) != vs->guest.ds->width || |
| 361 | ds_get_height(ds) != vs->guest.ds->height; |
| 362 | *(vs->guest.ds) = *(ds->surface); |
| 363 | if (size_changed) { |
| 364 | if (vs->csock != -1 && vnc_has_feature(vs, VNC_FEATURE_RESIZE)) { |
| 365 | vnc_write_u8(vs, 0); /* msg id */ |
| 366 | vnc_write_u8(vs, 0); |
| 367 | vnc_write_u16(vs, 1); /* number of rects */ |
| 368 | vnc_framebuffer_update(vs, 0, 0, ds_get_width(ds), ds_get_height(ds), |
| 369 | VNC_ENCODING_DESKTOPRESIZE); |
| 370 | vnc_flush(vs); |
| 371 | } |
| 372 | } |
| 373 | memset(vs->guest.dirty, 0xFF, sizeof(vs->guest.dirty)); |
| 374 | |
| 375 | /* server surface */ |
| 376 | if (!vs->server.ds) |
| 377 | vs->server.ds = qemu_mallocz(sizeof(*vs->server.ds)); |
| 378 | if (vs->server.ds->data) |
| 379 | qemu_free(vs->server.ds->data); |
| 380 | *(vs->server.ds) = *(ds->surface); |
| 381 | vs->server.ds->data = qemu_mallocz(vs->server.ds->linesize * |
| 382 | vs->server.ds->height); |
| 383 | memset(vs->server.dirty, 0xFF, sizeof(vs->guest.dirty)); |
| 384 | } |
| 385 | |
| 386 | static void vnc_dpy_resize(DisplayState *ds) |
| 387 | { |
| 388 | VncDisplay *vd = ds->opaque; |
| 389 | VncState *vs = vd->clients; |
| 390 | while (vs != NULL) { |
| 391 | vnc_resize(vs); |
| 392 | vs = vs->next; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /* fastest code */ |
| 397 | static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size) |
| 398 | { |
| 399 | vnc_write(vs, pixels, size); |
| 400 | } |
| 401 | |
| 402 | /* slowest but generic code. */ |
| 403 | static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) |
| 404 | { |
| 405 | uint8_t r, g, b; |
| 406 | |
| 407 | r = ((((v & vs->server.ds->pf.rmask) >> vs->server.ds->pf.rshift) << vs->clientds.pf.rbits) >> |
| 408 | vs->server.ds->pf.rbits); |
| 409 | g = ((((v & vs->server.ds->pf.gmask) >> vs->server.ds->pf.gshift) << vs->clientds.pf.gbits) >> |
| 410 | vs->server.ds->pf.gbits); |
| 411 | b = ((((v & vs->server.ds->pf.bmask) >> vs->server.ds->pf.bshift) << vs->clientds.pf.bbits) >> |
| 412 | vs->server.ds->pf.bbits); |
| 413 | v = (r << vs->clientds.pf.rshift) | |
| 414 | (g << vs->clientds.pf.gshift) | |
| 415 | (b << vs->clientds.pf.bshift); |
| 416 | switch(vs->clientds.pf.bytes_per_pixel) { |
| 417 | case 1: |
| 418 | buf[0] = v; |
| 419 | break; |
| 420 | case 2: |
| 421 | if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) { |
| 422 | buf[0] = v >> 8; |
| 423 | buf[1] = v; |
| 424 | } else { |
| 425 | buf[1] = v >> 8; |
| 426 | buf[0] = v; |
| 427 | } |
| 428 | break; |
| 429 | default: |
| 430 | case 4: |
| 431 | if (vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) { |
| 432 | buf[0] = v >> 24; |
| 433 | buf[1] = v >> 16; |
| 434 | buf[2] = v >> 8; |
| 435 | buf[3] = v; |
| 436 | } else { |
| 437 | buf[3] = v >> 24; |
| 438 | buf[2] = v >> 16; |
| 439 | buf[1] = v >> 8; |
| 440 | buf[0] = v; |
| 441 | } |
| 442 | break; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size) |
| 447 | { |
| 448 | uint8_t buf[4]; |
| 449 | |
| 450 | if (vs->server.ds->pf.bytes_per_pixel == 4) { |
| 451 | uint32_t *pixels = pixels1; |
| 452 | int n, i; |
| 453 | n = size >> 2; |
| 454 | for(i = 0; i < n; i++) { |
| 455 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 456 | vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); |
| 457 | } |
| 458 | } else if (vs->server.ds->pf.bytes_per_pixel == 2) { |
| 459 | uint16_t *pixels = pixels1; |
| 460 | int n, i; |
| 461 | n = size >> 1; |
| 462 | for(i = 0; i < n; i++) { |
| 463 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 464 | vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); |
| 465 | } |
| 466 | } else if (vs->server.ds->pf.bytes_per_pixel == 1) { |
| 467 | uint8_t *pixels = pixels1; |
| 468 | int n, i; |
| 469 | n = size; |
| 470 | for(i = 0; i < n; i++) { |
| 471 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 472 | vnc_write(vs, buf, vs->clientds.pf.bytes_per_pixel); |
| 473 | } |
| 474 | } else { |
| 475 | fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n"); |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h) |
| 480 | { |
| 481 | int i; |
| 482 | uint8_t *row; |
| 483 | |
| 484 | row = vs->server.ds->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds); |
| 485 | for (i = 0; i < h; i++) { |
| 486 | vs->write_pixels(vs, row, w * ds_get_bytes_per_pixel(vs->ds)); |
| 487 | row += ds_get_linesize(vs->ds); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h) |
| 492 | { |
| 493 | ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F); |
| 494 | ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F); |
| 495 | } |
| 496 | |
| 497 | #define BPP 8 |
| 498 | #include "vnchextile.h" |
| 499 | #undef BPP |
| 500 | |
| 501 | #define BPP 16 |
| 502 | #include "vnchextile.h" |
| 503 | #undef BPP |
| 504 | |
| 505 | #define BPP 32 |
| 506 | #include "vnchextile.h" |
| 507 | #undef BPP |
| 508 | |
| 509 | #define GENERIC |
| 510 | #define BPP 8 |
| 511 | #include "vnchextile.h" |
| 512 | #undef BPP |
| 513 | #undef GENERIC |
| 514 | |
| 515 | #define GENERIC |
| 516 | #define BPP 16 |
| 517 | #include "vnchextile.h" |
| 518 | #undef BPP |
| 519 | #undef GENERIC |
| 520 | |
| 521 | #define GENERIC |
| 522 | #define BPP 32 |
| 523 | #include "vnchextile.h" |
| 524 | #undef BPP |
| 525 | #undef GENERIC |
| 526 | |
| 527 | static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) |
| 528 | { |
| 529 | int i, j; |
| 530 | int has_fg, has_bg; |
| 531 | uint8_t *last_fg, *last_bg; |
| 532 | |
| 533 | last_fg = (uint8_t *) qemu_malloc(vs->server.ds->pf.bytes_per_pixel); |
| 534 | last_bg = (uint8_t *) qemu_malloc(vs->server.ds->pf.bytes_per_pixel); |
| 535 | has_fg = has_bg = 0; |
| 536 | for (j = y; j < (y + h); j += 16) { |
| 537 | for (i = x; i < (x + w); i += 16) { |
| 538 | vs->send_hextile_tile(vs, i, j, |
| 539 | MIN(16, x + w - i), MIN(16, y + h - j), |
| 540 | last_bg, last_fg, &has_bg, &has_fg); |
| 541 | } |
| 542 | } |
| 543 | free(last_fg); |
| 544 | free(last_bg); |
| 545 | |
| 546 | } |
| 547 | |
| 548 | static void vnc_zlib_init(VncState *vs) |
| 549 | { |
| 550 | int i; |
| 551 | for (i=0; i<(sizeof(vs->zlib_stream) / sizeof(z_stream)); i++) |
| 552 | vs->zlib_stream[i].opaque = NULL; |
| 553 | } |
| 554 | |
| 555 | static void vnc_zlib_start(VncState *vs) |
| 556 | { |
| 557 | buffer_reset(&vs->zlib); |
| 558 | |
| 559 | // make the output buffer be the zlib buffer, so we can compress it later |
| 560 | vs->zlib_tmp = vs->output; |
| 561 | vs->output = vs->zlib; |
| 562 | } |
| 563 | |
| 564 | static int vnc_zlib_stop(VncState *vs, int stream_id) |
| 565 | { |
| 566 | z_streamp zstream = &vs->zlib_stream[stream_id]; |
| 567 | int previous_out; |
| 568 | |
| 569 | // switch back to normal output/zlib buffers |
| 570 | vs->zlib = vs->output; |
| 571 | vs->output = vs->zlib_tmp; |
| 572 | |
| 573 | // compress the zlib buffer |
| 574 | |
| 575 | // initialize the stream |
| 576 | // XXX need one stream per session |
| 577 | if (zstream->opaque != vs) { |
| 578 | int err; |
| 579 | |
| 580 | VNC_DEBUG("VNC: initializing zlib stream %d\n", stream_id); |
| 581 | VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs); |
| 582 | zstream->zalloc = Z_NULL; |
| 583 | zstream->zfree = Z_NULL; |
| 584 | |
| 585 | err = deflateInit2(zstream, vs->tight_compression, Z_DEFLATED, MAX_WBITS, |
| 586 | MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY); |
| 587 | |
| 588 | if (err != Z_OK) { |
| 589 | fprintf(stderr, "VNC: error initializing zlib\n"); |
| 590 | return -1; |
| 591 | } |
| 592 | |
| 593 | zstream->opaque = vs; |
| 594 | } |
| 595 | |
| 596 | // XXX what to do if tight_compression changed in between? |
| 597 | |
| 598 | // reserve memory in output buffer |
| 599 | buffer_reserve(&vs->output, vs->zlib.offset + 64); |
| 600 | |
| 601 | // set pointers |
| 602 | zstream->next_in = vs->zlib.buffer; |
| 603 | zstream->avail_in = vs->zlib.offset; |
| 604 | zstream->next_out = vs->output.buffer + vs->output.offset; |
| 605 | zstream->avail_out = vs->output.capacity - vs->output.offset; |
| 606 | zstream->data_type = Z_BINARY; |
| 607 | previous_out = zstream->total_out; |
| 608 | |
| 609 | // start encoding |
| 610 | if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) { |
| 611 | fprintf(stderr, "VNC: error during zlib compression\n"); |
| 612 | return -1; |
| 613 | } |
| 614 | |
| 615 | vs->output.offset = vs->output.capacity - zstream->avail_out; |
| 616 | return zstream->total_out - previous_out; |
| 617 | } |
| 618 | |
| 619 | static void send_framebuffer_update_zlib(VncState *vs, int x, int y, int w, int h) |
| 620 | { |
| 621 | int old_offset, new_offset, bytes_written; |
| 622 | |
| 623 | vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB); |
| 624 | |
| 625 | // remember where we put in the follow-up size |
| 626 | old_offset = vs->output.offset; |
| 627 | vnc_write_s32(vs, 0); |
| 628 | |
| 629 | // compress the stream |
| 630 | vnc_zlib_start(vs); |
| 631 | send_framebuffer_update_raw(vs, x, y, w, h); |
| 632 | bytes_written = vnc_zlib_stop(vs, 0); |
| 633 | |
| 634 | if (bytes_written == -1) |
| 635 | return; |
| 636 | |
| 637 | // hack in the size |
| 638 | new_offset = vs->output.offset; |
| 639 | vs->output.offset = old_offset; |
| 640 | vnc_write_u32(vs, bytes_written); |
| 641 | vs->output.offset = new_offset; |
| 642 | } |
| 643 | |
| 644 | static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h) |
| 645 | { |
| 646 | switch(vs->vnc_encoding) { |
| 647 | case VNC_ENCODING_ZLIB: |
| 648 | send_framebuffer_update_zlib(vs, x, y, w, h); |
| 649 | break; |
| 650 | case VNC_ENCODING_HEXTILE: |
| 651 | vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_HEXTILE); |
| 652 | send_framebuffer_update_hextile(vs, x, y, w, h); |
| 653 | break; |
| 654 | default: |
| 655 | vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); |
| 656 | send_framebuffer_update_raw(vs, x, y, w, h); |
| 657 | break; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h) |
| 662 | { |
| 663 | vnc_write_u8(vs, 0); /* msg id */ |
| 664 | vnc_write_u8(vs, 0); |
| 665 | vnc_write_u16(vs, 1); /* number of rects */ |
| 666 | vnc_framebuffer_update(vs, dst_x, dst_y, w, h, VNC_ENCODING_COPYRECT); |
| 667 | vnc_write_u16(vs, src_x); |
| 668 | vnc_write_u16(vs, src_y); |
| 669 | vnc_flush(vs); |
| 670 | } |
| 671 | |
| 672 | static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h) |
| 673 | { |
| 674 | VncDisplay *vd = ds->opaque; |
| 675 | VncState *vs, *vn; |
| 676 | |
| 677 | for (vs = vd->clients; vs != NULL; vs = vn) { |
| 678 | vn = vs->next; |
| 679 | if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) { |
| 680 | vs->force_update = 1; |
| 681 | vnc_update_client(vs); |
| 682 | /* vs might be free()ed here */ |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | for (vs = vd->clients; vs != NULL; vs = vs->next) { |
| 687 | if (vnc_has_feature(vs, VNC_FEATURE_COPYRECT)) |
| 688 | vnc_copy(vs, src_x, src_y, dst_x, dst_y, w, h); |
| 689 | else /* TODO */ |
| 690 | vnc_update(vs, dst_x, dst_y, w, h); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | static int find_and_clear_dirty_height(struct VncSurface *s, |
| 695 | int y, int last_x, int x) |
| 696 | { |
| 697 | int h; |
| 698 | |
| 699 | for (h = 1; h < (s->ds->height - y); h++) { |
| 700 | int tmp_x; |
| 701 | if (!vnc_get_bit(s->dirty[y + h], last_x)) |
| 702 | break; |
| 703 | for (tmp_x = last_x; tmp_x < x; tmp_x++) |
| 704 | vnc_clear_bit(s->dirty[y + h], tmp_x); |
| 705 | } |
| 706 | |
| 707 | return h; |
| 708 | } |
| 709 | |
| 710 | static void vnc_update_client(void *opaque) |
| 711 | { |
| 712 | VncState *vs = opaque; |
| 713 | if (vs->need_update && vs->csock != -1) { |
| 714 | int y; |
| 715 | uint8_t *guest_row; |
| 716 | uint8_t *server_row; |
| 717 | int cmp_bytes; |
| 718 | uint32_t width_mask[VNC_DIRTY_WORDS]; |
| 719 | int n_rectangles; |
| 720 | int saved_offset; |
| 721 | int has_dirty = 0; |
| 722 | |
| 723 | if (vs->output.offset && !vs->audio_cap && !vs->force_update) { |
| 724 | /* kernel send buffers are full -> drop frames to throttle */ |
David 'Digit' Turner | 5973c77 | 2011-05-10 07:06:00 +0200 | [diff] [blame] | 725 | qemu_mod_timer(vs->timer, qemu_get_clock_ms(rt_clock) + VNC_REFRESH_INTERVAL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 726 | return; |
| 727 | } |
| 728 | |
| 729 | vga_hw_update(); |
| 730 | |
| 731 | /* |
| 732 | * Walk through the guest dirty map. |
| 733 | * Check and copy modified bits from guest to server surface. |
| 734 | * Update server dirty map. |
| 735 | */ |
| 736 | vnc_set_bits(width_mask, (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS); |
| 737 | cmp_bytes = 16 * ds_get_bytes_per_pixel(vs->ds); |
| 738 | guest_row = vs->guest.ds->data; |
| 739 | server_row = vs->server.ds->data; |
| 740 | for (y = 0; y < vs->guest.ds->height; y++) { |
| 741 | if (vnc_and_bits(vs->guest.dirty[y], width_mask, VNC_DIRTY_WORDS)) { |
| 742 | int x; |
| 743 | uint8_t *guest_ptr; |
| 744 | uint8_t *server_ptr; |
| 745 | |
| 746 | guest_ptr = guest_row; |
| 747 | server_ptr = server_row; |
| 748 | |
| 749 | for (x = 0; x < vs->guest.ds->width; |
| 750 | x += 16, guest_ptr += cmp_bytes, server_ptr += cmp_bytes) { |
| 751 | if (!vnc_get_bit(vs->guest.dirty[y], (x / 16))) |
| 752 | continue; |
| 753 | vnc_clear_bit(vs->guest.dirty[y], (x / 16)); |
| 754 | if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0) |
| 755 | continue; |
| 756 | memcpy(server_ptr, guest_ptr, cmp_bytes); |
| 757 | vnc_set_bit(vs->server.dirty[y], (x / 16)); |
| 758 | has_dirty++; |
| 759 | } |
| 760 | } |
| 761 | guest_row += ds_get_linesize(vs->ds); |
| 762 | server_row += ds_get_linesize(vs->ds); |
| 763 | } |
| 764 | |
| 765 | if (!has_dirty && !vs->audio_cap && !vs->force_update) { |
David 'Digit' Turner | 5973c77 | 2011-05-10 07:06:00 +0200 | [diff] [blame] | 766 | qemu_mod_timer(vs->timer, qemu_get_clock_ms(rt_clock) + VNC_REFRESH_INTERVAL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 767 | return; |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * Send screen updates to the vnc client using the server |
| 772 | * surface and server dirty map. guest surface updates |
| 773 | * happening in parallel don't disturb us, the next pass will |
| 774 | * send them to the client. |
| 775 | */ |
| 776 | n_rectangles = 0; |
| 777 | vnc_write_u8(vs, 0); /* msg id */ |
| 778 | vnc_write_u8(vs, 0); |
| 779 | saved_offset = vs->output.offset; |
| 780 | vnc_write_u16(vs, 0); |
| 781 | |
| 782 | for (y = 0; y < vs->server.ds->height; y++) { |
| 783 | int x; |
| 784 | int last_x = -1; |
| 785 | for (x = 0; x < vs->server.ds->width / 16; x++) { |
| 786 | if (vnc_get_bit(vs->server.dirty[y], x)) { |
| 787 | if (last_x == -1) { |
| 788 | last_x = x; |
| 789 | } |
| 790 | vnc_clear_bit(vs->server.dirty[y], x); |
| 791 | } else { |
| 792 | if (last_x != -1) { |
| 793 | int h = find_and_clear_dirty_height(&vs->server, y, last_x, x); |
| 794 | send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 795 | n_rectangles++; |
| 796 | } |
| 797 | last_x = -1; |
| 798 | } |
| 799 | } |
| 800 | if (last_x != -1) { |
| 801 | int h = find_and_clear_dirty_height(&vs->server, y, last_x, x); |
| 802 | send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 803 | n_rectangles++; |
| 804 | } |
| 805 | } |
| 806 | vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF; |
| 807 | vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF; |
| 808 | vnc_flush(vs); |
| 809 | vs->force_update = 0; |
| 810 | |
| 811 | } |
| 812 | |
| 813 | if (vs->csock != -1) { |
David 'Digit' Turner | 5973c77 | 2011-05-10 07:06:00 +0200 | [diff] [blame] | 814 | qemu_mod_timer(vs->timer, qemu_get_clock_ms(rt_clock) + VNC_REFRESH_INTERVAL); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 815 | } else { |
| 816 | vnc_disconnect_finish(vs); |
| 817 | } |
| 818 | |
| 819 | } |
| 820 | |
| 821 | /* audio */ |
| 822 | static void audio_capture_notify(void *opaque, audcnotification_e cmd) |
| 823 | { |
| 824 | VncState *vs = opaque; |
| 825 | |
| 826 | switch (cmd) { |
| 827 | case AUD_CNOTIFY_DISABLE: |
| 828 | vnc_write_u8(vs, 255); |
| 829 | vnc_write_u8(vs, 1); |
| 830 | vnc_write_u16(vs, 0); |
| 831 | vnc_flush(vs); |
| 832 | break; |
| 833 | |
| 834 | case AUD_CNOTIFY_ENABLE: |
| 835 | vnc_write_u8(vs, 255); |
| 836 | vnc_write_u8(vs, 1); |
| 837 | vnc_write_u16(vs, 1); |
| 838 | vnc_flush(vs); |
| 839 | break; |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | static void audio_capture_destroy(void *opaque) |
| 844 | { |
| 845 | } |
| 846 | |
| 847 | static void audio_capture(void *opaque, void *buf, int size) |
| 848 | { |
| 849 | VncState *vs = opaque; |
| 850 | |
| 851 | vnc_write_u8(vs, 255); |
| 852 | vnc_write_u8(vs, 1); |
| 853 | vnc_write_u16(vs, 2); |
| 854 | vnc_write_u32(vs, size); |
| 855 | vnc_write(vs, buf, size); |
| 856 | vnc_flush(vs); |
| 857 | } |
| 858 | |
| 859 | static void audio_add(VncState *vs) |
| 860 | { |
| 861 | Monitor *mon = cur_mon; |
| 862 | struct audio_capture_ops ops; |
| 863 | |
| 864 | if (vs->audio_cap) { |
| 865 | monitor_printf(mon, "audio already running\n"); |
| 866 | return; |
| 867 | } |
| 868 | |
| 869 | ops.notify = audio_capture_notify; |
| 870 | ops.destroy = audio_capture_destroy; |
| 871 | ops.capture = audio_capture; |
| 872 | |
| 873 | vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs); |
| 874 | if (!vs->audio_cap) { |
| 875 | monitor_printf(mon, "Failed to add audio capture\n"); |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | static void audio_del(VncState *vs) |
| 880 | { |
| 881 | if (vs->audio_cap) { |
| 882 | AUD_del_capture(vs->audio_cap, vs); |
| 883 | vs->audio_cap = NULL; |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | static void vnc_disconnect_start(VncState *vs) |
| 888 | { |
| 889 | if (vs->csock == -1) |
| 890 | return; |
| 891 | qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
| 892 | closesocket(vs->csock); |
| 893 | vs->csock = -1; |
| 894 | } |
| 895 | |
| 896 | static void vnc_disconnect_finish(VncState *vs) |
| 897 | { |
| 898 | qemu_del_timer(vs->timer); |
| 899 | qemu_free_timer(vs->timer); |
| 900 | if (vs->input.buffer) qemu_free(vs->input.buffer); |
| 901 | if (vs->output.buffer) qemu_free(vs->output.buffer); |
| 902 | #ifdef CONFIG_VNC_TLS |
| 903 | vnc_tls_client_cleanup(vs); |
| 904 | #endif /* CONFIG_VNC_TLS */ |
| 905 | #ifdef CONFIG_VNC_SASL |
| 906 | vnc_sasl_client_cleanup(vs); |
| 907 | #endif /* CONFIG_VNC_SASL */ |
| 908 | audio_del(vs); |
| 909 | |
| 910 | VncState *p, *parent = NULL; |
| 911 | for (p = vs->vd->clients; p != NULL; p = p->next) { |
| 912 | if (p == vs) { |
| 913 | if (parent) |
| 914 | parent->next = p->next; |
| 915 | else |
| 916 | vs->vd->clients = p->next; |
| 917 | break; |
| 918 | } |
| 919 | parent = p; |
| 920 | } |
| 921 | if (!vs->vd->clients) |
| 922 | dcl->idle = 1; |
| 923 | |
| 924 | qemu_free(vs->server.ds->data); |
| 925 | qemu_free(vs->server.ds); |
| 926 | qemu_free(vs->guest.ds); |
| 927 | qemu_free(vs); |
| 928 | } |
| 929 | |
| 930 | int vnc_client_io_error(VncState *vs, int ret, int last_errno) |
| 931 | { |
| 932 | if (ret == 0 || ret == -1) { |
| 933 | if (ret == -1) { |
| 934 | switch (last_errno) { |
| 935 | case EINTR: |
| 936 | case EAGAIN: |
| 937 | #ifdef _WIN32 |
| 938 | case WSAEWOULDBLOCK: |
| 939 | #endif |
| 940 | return 0; |
| 941 | default: |
| 942 | break; |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | VNC_DEBUG("Closing down client sock: ret %d, errno %d\n", |
| 947 | ret, ret < 0 ? last_errno : 0); |
| 948 | vnc_disconnect_start(vs); |
| 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | |
| 956 | void vnc_client_error(VncState *vs) |
| 957 | { |
| 958 | VNC_DEBUG("Closing down client sock: protocol error\n"); |
| 959 | vnc_disconnect_start(vs); |
| 960 | } |
| 961 | |
| 962 | |
| 963 | /* |
| 964 | * Called to write a chunk of data to the client socket. The data may |
| 965 | * be the raw data, or may have already been encoded by SASL. |
| 966 | * The data will be written either straight onto the socket, or |
| 967 | * written via the GNUTLS wrappers, if TLS/SSL encryption is enabled |
| 968 | * |
| 969 | * NB, it is theoretically possible to have 2 layers of encryption, |
| 970 | * both SASL, and this TLS layer. It is highly unlikely in practice |
| 971 | * though, since SASL encryption will typically be a no-op if TLS |
| 972 | * is active |
| 973 | * |
| 974 | * Returns the number of bytes written, which may be less than |
| 975 | * the requested 'datalen' if the socket would block. Returns |
| 976 | * -1 on error, and disconnects the client socket. |
| 977 | */ |
| 978 | long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen) |
| 979 | { |
| 980 | long ret; |
| 981 | #ifdef CONFIG_VNC_TLS |
| 982 | if (vs->tls.session) { |
| 983 | ret = gnutls_write(vs->tls.session, data, datalen); |
| 984 | if (ret < 0) { |
| 985 | if (ret == GNUTLS_E_AGAIN) |
| 986 | errno = EAGAIN; |
| 987 | else |
| 988 | errno = EIO; |
| 989 | ret = -1; |
| 990 | } |
| 991 | } else |
| 992 | #endif /* CONFIG_VNC_TLS */ |
| 993 | ret = socket_send(vs->csock, data, datalen); |
| 994 | VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret); |
| 995 | return vnc_client_io_error(vs, ret, socket_error()); |
| 996 | } |
| 997 | |
| 998 | |
| 999 | /* |
| 1000 | * Called to write buffered data to the client socket, when not |
| 1001 | * using any SASL SSF encryption layers. Will write as much data |
| 1002 | * as possible without blocking. If all buffered data is written, |
| 1003 | * will switch the FD poll() handler back to read monitoring. |
| 1004 | * |
| 1005 | * Returns the number of bytes written, which may be less than |
| 1006 | * the buffered output data if the socket would block. Returns |
| 1007 | * -1 on error, and disconnects the client socket. |
| 1008 | */ |
| 1009 | static long vnc_client_write_plain(VncState *vs) |
| 1010 | { |
| 1011 | long ret; |
| 1012 | |
| 1013 | #ifdef CONFIG_VNC_SASL |
| 1014 | VNC_DEBUG("Write Plain: Pending output %p size %zd offset %zd. Wait SSF %d\n", |
| 1015 | vs->output.buffer, vs->output.capacity, vs->output.offset, |
| 1016 | vs->sasl.waitWriteSSF); |
| 1017 | |
| 1018 | if (vs->sasl.conn && |
| 1019 | vs->sasl.runSSF && |
| 1020 | vs->sasl.waitWriteSSF) { |
| 1021 | ret = vnc_client_write_buf(vs, vs->output.buffer, vs->sasl.waitWriteSSF); |
| 1022 | if (ret) |
| 1023 | vs->sasl.waitWriteSSF -= ret; |
| 1024 | } else |
| 1025 | #endif /* CONFIG_VNC_SASL */ |
| 1026 | ret = vnc_client_write_buf(vs, vs->output.buffer, vs->output.offset); |
| 1027 | if (!ret) |
| 1028 | return 0; |
| 1029 | |
| 1030 | memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret)); |
| 1031 | vs->output.offset -= ret; |
| 1032 | |
| 1033 | if (vs->output.offset == 0) { |
| 1034 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 1035 | } |
| 1036 | |
| 1037 | return ret; |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | /* |
| 1042 | * First function called whenever there is data to be written to |
| 1043 | * the client socket. Will delegate actual work according to whether |
| 1044 | * SASL SSF layers are enabled (thus requiring encryption calls) |
| 1045 | */ |
| 1046 | void vnc_client_write(void *opaque) |
| 1047 | { |
| 1048 | long ret; |
| 1049 | VncState *vs = opaque; |
| 1050 | |
| 1051 | #ifdef CONFIG_VNC_SASL |
| 1052 | if (vs->sasl.conn && |
| 1053 | vs->sasl.runSSF && |
| 1054 | !vs->sasl.waitWriteSSF) |
| 1055 | ret = vnc_client_write_sasl(vs); |
| 1056 | else |
| 1057 | #endif /* CONFIG_VNC_SASL */ |
| 1058 | ret = vnc_client_write_plain(vs); |
| 1059 | } |
| 1060 | |
| 1061 | void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) |
| 1062 | { |
| 1063 | vs->read_handler = func; |
| 1064 | vs->read_handler_expect = expecting; |
| 1065 | } |
| 1066 | |
| 1067 | |
| 1068 | /* |
| 1069 | * Called to read a chunk of data from the client socket. The data may |
| 1070 | * be the raw data, or may need to be further decoded by SASL. |
| 1071 | * The data will be read either straight from to the socket, or |
| 1072 | * read via the GNUTLS wrappers, if TLS/SSL encryption is enabled |
| 1073 | * |
| 1074 | * NB, it is theoretically possible to have 2 layers of encryption, |
| 1075 | * both SASL, and this TLS layer. It is highly unlikely in practice |
| 1076 | * though, since SASL encryption will typically be a no-op if TLS |
| 1077 | * is active |
| 1078 | * |
| 1079 | * Returns the number of bytes read, which may be less than |
| 1080 | * the requested 'datalen' if the socket would block. Returns |
| 1081 | * -1 on error, and disconnects the client socket. |
| 1082 | */ |
| 1083 | long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen) |
| 1084 | { |
| 1085 | long ret; |
| 1086 | #ifdef CONFIG_VNC_TLS |
| 1087 | if (vs->tls.session) { |
| 1088 | ret = gnutls_read(vs->tls.session, data, datalen); |
| 1089 | if (ret < 0) { |
| 1090 | if (ret == GNUTLS_E_AGAIN) |
| 1091 | errno = EAGAIN; |
| 1092 | else |
| 1093 | errno = EIO; |
| 1094 | ret = -1; |
| 1095 | } |
| 1096 | } else |
| 1097 | #endif /* CONFIG_VNC_TLS */ |
| 1098 | ret = socket_recv(vs->csock, data, datalen); |
| 1099 | VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret); |
| 1100 | return vnc_client_io_error(vs, ret, socket_error()); |
| 1101 | } |
| 1102 | |
| 1103 | |
| 1104 | /* |
| 1105 | * Called to read data from the client socket to the input buffer, |
| 1106 | * when not using any SASL SSF encryption layers. Will read as much |
| 1107 | * data as possible without blocking. |
| 1108 | * |
| 1109 | * Returns the number of bytes read. Returns -1 on error, and |
| 1110 | * disconnects the client socket. |
| 1111 | */ |
| 1112 | static long vnc_client_read_plain(VncState *vs) |
| 1113 | { |
| 1114 | int ret; |
| 1115 | VNC_DEBUG("Read plain %p size %zd offset %zd\n", |
| 1116 | vs->input.buffer, vs->input.capacity, vs->input.offset); |
| 1117 | buffer_reserve(&vs->input, 4096); |
| 1118 | ret = vnc_client_read_buf(vs, buffer_end(&vs->input), 4096); |
| 1119 | if (!ret) |
| 1120 | return 0; |
| 1121 | vs->input.offset += ret; |
| 1122 | return ret; |
| 1123 | } |
| 1124 | |
| 1125 | |
| 1126 | /* |
| 1127 | * First function called whenever there is more data to be read from |
| 1128 | * the client socket. Will delegate actual work according to whether |
| 1129 | * SASL SSF layers are enabled (thus requiring decryption calls) |
| 1130 | */ |
| 1131 | void vnc_client_read(void *opaque) |
| 1132 | { |
| 1133 | VncState *vs = opaque; |
| 1134 | long ret; |
| 1135 | |
| 1136 | #ifdef CONFIG_VNC_SASL |
| 1137 | if (vs->sasl.conn && vs->sasl.runSSF) |
| 1138 | ret = vnc_client_read_sasl(vs); |
| 1139 | else |
| 1140 | #endif /* CONFIG_VNC_SASL */ |
| 1141 | ret = vnc_client_read_plain(vs); |
| 1142 | if (!ret) { |
| 1143 | if (vs->csock == -1) |
| 1144 | vnc_disconnect_finish(vs); |
| 1145 | return; |
| 1146 | } |
| 1147 | |
| 1148 | while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { |
| 1149 | size_t len = vs->read_handler_expect; |
| 1150 | int ret; |
| 1151 | |
| 1152 | ret = vs->read_handler(vs, vs->input.buffer, len); |
| 1153 | if (vs->csock == -1) { |
| 1154 | vnc_disconnect_finish(vs); |
| 1155 | return; |
| 1156 | } |
| 1157 | |
| 1158 | if (!ret) { |
| 1159 | memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len)); |
| 1160 | vs->input.offset -= len; |
| 1161 | } else { |
| 1162 | vs->read_handler_expect = ret; |
| 1163 | } |
| 1164 | } |
| 1165 | } |
| 1166 | |
| 1167 | void vnc_write(VncState *vs, const void *data, size_t len) |
| 1168 | { |
| 1169 | buffer_reserve(&vs->output, len); |
| 1170 | |
| 1171 | if (vs->csock != -1 && buffer_empty(&vs->output)) { |
| 1172 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs); |
| 1173 | } |
| 1174 | |
| 1175 | buffer_append(&vs->output, data, len); |
| 1176 | } |
| 1177 | |
| 1178 | void vnc_write_s32(VncState *vs, int32_t value) |
| 1179 | { |
| 1180 | vnc_write_u32(vs, *(uint32_t *)&value); |
| 1181 | } |
| 1182 | |
| 1183 | void vnc_write_u32(VncState *vs, uint32_t value) |
| 1184 | { |
| 1185 | uint8_t buf[4]; |
| 1186 | |
| 1187 | buf[0] = (value >> 24) & 0xFF; |
| 1188 | buf[1] = (value >> 16) & 0xFF; |
| 1189 | buf[2] = (value >> 8) & 0xFF; |
| 1190 | buf[3] = value & 0xFF; |
| 1191 | |
| 1192 | vnc_write(vs, buf, 4); |
| 1193 | } |
| 1194 | |
| 1195 | void vnc_write_u16(VncState *vs, uint16_t value) |
| 1196 | { |
| 1197 | uint8_t buf[2]; |
| 1198 | |
| 1199 | buf[0] = (value >> 8) & 0xFF; |
| 1200 | buf[1] = value & 0xFF; |
| 1201 | |
| 1202 | vnc_write(vs, buf, 2); |
| 1203 | } |
| 1204 | |
| 1205 | void vnc_write_u8(VncState *vs, uint8_t value) |
| 1206 | { |
| 1207 | vnc_write(vs, (char *)&value, 1); |
| 1208 | } |
| 1209 | |
| 1210 | void vnc_flush(VncState *vs) |
| 1211 | { |
| 1212 | if (vs->csock != -1 && vs->output.offset) |
| 1213 | vnc_client_write(vs); |
| 1214 | } |
| 1215 | |
| 1216 | uint8_t read_u8(uint8_t *data, size_t offset) |
| 1217 | { |
| 1218 | return data[offset]; |
| 1219 | } |
| 1220 | |
| 1221 | uint16_t read_u16(uint8_t *data, size_t offset) |
| 1222 | { |
| 1223 | return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); |
| 1224 | } |
| 1225 | |
| 1226 | int32_t read_s32(uint8_t *data, size_t offset) |
| 1227 | { |
| 1228 | return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | |
| 1229 | (data[offset + 2] << 8) | data[offset + 3]); |
| 1230 | } |
| 1231 | |
| 1232 | uint32_t read_u32(uint8_t *data, size_t offset) |
| 1233 | { |
| 1234 | return ((data[offset] << 24) | (data[offset + 1] << 16) | |
| 1235 | (data[offset + 2] << 8) | data[offset + 3]); |
| 1236 | } |
| 1237 | |
| 1238 | static void client_cut_text(VncState *vs, size_t len, uint8_t *text) |
| 1239 | { |
| 1240 | } |
| 1241 | |
| 1242 | static void check_pointer_type_change(VncState *vs, int absolute) |
| 1243 | { |
| 1244 | if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE) && vs->absolute != absolute) { |
| 1245 | vnc_write_u8(vs, 0); |
| 1246 | vnc_write_u8(vs, 0); |
| 1247 | vnc_write_u16(vs, 1); |
| 1248 | vnc_framebuffer_update(vs, absolute, 0, |
| 1249 | ds_get_width(vs->ds), ds_get_height(vs->ds), |
| 1250 | VNC_ENCODING_POINTER_TYPE_CHANGE); |
| 1251 | vnc_flush(vs); |
| 1252 | } |
| 1253 | vs->absolute = absolute; |
| 1254 | } |
| 1255 | |
| 1256 | static void pointer_event(VncState *vs, int button_mask, int x, int y) |
| 1257 | { |
| 1258 | int buttons = 0; |
| 1259 | int dz = 0; |
| 1260 | |
| 1261 | if (button_mask & 0x01) |
| 1262 | buttons |= MOUSE_EVENT_LBUTTON; |
| 1263 | if (button_mask & 0x02) |
| 1264 | buttons |= MOUSE_EVENT_MBUTTON; |
| 1265 | if (button_mask & 0x04) |
| 1266 | buttons |= MOUSE_EVENT_RBUTTON; |
| 1267 | if (button_mask & 0x08) |
| 1268 | dz = -1; |
| 1269 | if (button_mask & 0x10) |
| 1270 | dz = 1; |
| 1271 | |
| 1272 | if (vs->absolute) { |
| 1273 | kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1), |
| 1274 | y * 0x7FFF / (ds_get_height(vs->ds) - 1), |
| 1275 | dz, buttons); |
| 1276 | } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { |
| 1277 | x -= 0x7FFF; |
| 1278 | y -= 0x7FFF; |
| 1279 | |
| 1280 | kbd_mouse_event(x, y, dz, buttons); |
| 1281 | } else { |
| 1282 | if (vs->last_x != -1) |
| 1283 | kbd_mouse_event(x - vs->last_x, |
| 1284 | y - vs->last_y, |
| 1285 | dz, buttons); |
| 1286 | vs->last_x = x; |
| 1287 | vs->last_y = y; |
| 1288 | } |
| 1289 | |
| 1290 | check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 1291 | } |
| 1292 | |
| 1293 | static void reset_keys(VncState *vs) |
| 1294 | { |
| 1295 | int i; |
| 1296 | for(i = 0; i < 256; i++) { |
| 1297 | if (vs->modifiers_state[i]) { |
| 1298 | if (i & 0x80) |
| 1299 | kbd_put_keycode(0xe0); |
| 1300 | kbd_put_keycode(i | 0x80); |
| 1301 | vs->modifiers_state[i] = 0; |
| 1302 | } |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | static void press_key(VncState *vs, int keysym) |
| 1307 | { |
| 1308 | kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) & 0x7f); |
| 1309 | kbd_put_keycode(keysym2scancode(vs->vd->kbd_layout, keysym) | 0x80); |
| 1310 | } |
| 1311 | |
| 1312 | static void do_key_event(VncState *vs, int down, int keycode, int sym) |
| 1313 | { |
| 1314 | /* QEMU console switch */ |
| 1315 | switch(keycode) { |
| 1316 | case 0x2a: /* Left Shift */ |
| 1317 | case 0x36: /* Right Shift */ |
| 1318 | case 0x1d: /* Left CTRL */ |
| 1319 | case 0x9d: /* Right CTRL */ |
| 1320 | case 0x38: /* Left ALT */ |
| 1321 | case 0xb8: /* Right ALT */ |
| 1322 | if (down) |
| 1323 | vs->modifiers_state[keycode] = 1; |
| 1324 | else |
| 1325 | vs->modifiers_state[keycode] = 0; |
| 1326 | break; |
| 1327 | case 0x02 ... 0x0a: /* '1' to '9' keys */ |
| 1328 | if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { |
| 1329 | /* Reset the modifiers sent to the current console */ |
| 1330 | reset_keys(vs); |
| 1331 | console_select(keycode - 0x02); |
| 1332 | return; |
| 1333 | } |
| 1334 | break; |
| 1335 | case 0x3a: /* CapsLock */ |
| 1336 | case 0x45: /* NumLock */ |
| 1337 | if (!down) |
| 1338 | vs->modifiers_state[keycode] ^= 1; |
| 1339 | break; |
| 1340 | } |
| 1341 | |
| 1342 | if (keycode_is_keypad(vs->vd->kbd_layout, keycode)) { |
| 1343 | /* If the numlock state needs to change then simulate an additional |
| 1344 | keypress before sending this one. This will happen if the user |
| 1345 | toggles numlock away from the VNC window. |
| 1346 | */ |
| 1347 | if (keysym_is_numlock(vs->vd->kbd_layout, sym & 0xFFFF)) { |
| 1348 | if (!vs->modifiers_state[0x45]) { |
| 1349 | vs->modifiers_state[0x45] = 1; |
| 1350 | press_key(vs, 0xff7f); |
| 1351 | } |
| 1352 | } else { |
| 1353 | if (vs->modifiers_state[0x45]) { |
| 1354 | vs->modifiers_state[0x45] = 0; |
| 1355 | press_key(vs, 0xff7f); |
| 1356 | } |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | if (is_graphic_console()) { |
| 1361 | if (keycode & 0x80) |
| 1362 | kbd_put_keycode(0xe0); |
| 1363 | if (down) |
| 1364 | kbd_put_keycode(keycode & 0x7f); |
| 1365 | else |
| 1366 | kbd_put_keycode(keycode | 0x80); |
| 1367 | } else { |
| 1368 | /* QEMU console emulation */ |
| 1369 | if (down) { |
| 1370 | int numlock = vs->modifiers_state[0x45]; |
| 1371 | switch (keycode) { |
| 1372 | case 0x2a: /* Left Shift */ |
| 1373 | case 0x36: /* Right Shift */ |
| 1374 | case 0x1d: /* Left CTRL */ |
| 1375 | case 0x9d: /* Right CTRL */ |
| 1376 | case 0x38: /* Left ALT */ |
| 1377 | case 0xb8: /* Right ALT */ |
| 1378 | break; |
| 1379 | case 0xc8: |
| 1380 | kbd_put_keysym(QEMU_KEY_UP); |
| 1381 | break; |
| 1382 | case 0xd0: |
| 1383 | kbd_put_keysym(QEMU_KEY_DOWN); |
| 1384 | break; |
| 1385 | case 0xcb: |
| 1386 | kbd_put_keysym(QEMU_KEY_LEFT); |
| 1387 | break; |
| 1388 | case 0xcd: |
| 1389 | kbd_put_keysym(QEMU_KEY_RIGHT); |
| 1390 | break; |
| 1391 | case 0xd3: |
| 1392 | kbd_put_keysym(QEMU_KEY_DELETE); |
| 1393 | break; |
| 1394 | case 0xc7: |
| 1395 | kbd_put_keysym(QEMU_KEY_HOME); |
| 1396 | break; |
| 1397 | case 0xcf: |
| 1398 | kbd_put_keysym(QEMU_KEY_END); |
| 1399 | break; |
| 1400 | case 0xc9: |
| 1401 | kbd_put_keysym(QEMU_KEY_PAGEUP); |
| 1402 | break; |
| 1403 | case 0xd1: |
| 1404 | kbd_put_keysym(QEMU_KEY_PAGEDOWN); |
| 1405 | break; |
| 1406 | |
| 1407 | case 0x47: |
| 1408 | kbd_put_keysym(numlock ? '7' : QEMU_KEY_HOME); |
| 1409 | break; |
| 1410 | case 0x48: |
| 1411 | kbd_put_keysym(numlock ? '8' : QEMU_KEY_UP); |
| 1412 | break; |
| 1413 | case 0x49: |
| 1414 | kbd_put_keysym(numlock ? '9' : QEMU_KEY_PAGEUP); |
| 1415 | break; |
| 1416 | case 0x4b: |
| 1417 | kbd_put_keysym(numlock ? '4' : QEMU_KEY_LEFT); |
| 1418 | break; |
| 1419 | case 0x4c: |
| 1420 | kbd_put_keysym('5'); |
| 1421 | break; |
| 1422 | case 0x4d: |
| 1423 | kbd_put_keysym(numlock ? '6' : QEMU_KEY_RIGHT); |
| 1424 | break; |
| 1425 | case 0x4f: |
| 1426 | kbd_put_keysym(numlock ? '1' : QEMU_KEY_END); |
| 1427 | break; |
| 1428 | case 0x50: |
| 1429 | kbd_put_keysym(numlock ? '2' : QEMU_KEY_DOWN); |
| 1430 | break; |
| 1431 | case 0x51: |
| 1432 | kbd_put_keysym(numlock ? '3' : QEMU_KEY_PAGEDOWN); |
| 1433 | break; |
| 1434 | case 0x52: |
| 1435 | kbd_put_keysym('0'); |
| 1436 | break; |
| 1437 | case 0x53: |
| 1438 | kbd_put_keysym(numlock ? '.' : QEMU_KEY_DELETE); |
| 1439 | break; |
| 1440 | |
| 1441 | case 0xb5: |
| 1442 | kbd_put_keysym('/'); |
| 1443 | break; |
| 1444 | case 0x37: |
| 1445 | kbd_put_keysym('*'); |
| 1446 | break; |
| 1447 | case 0x4a: |
| 1448 | kbd_put_keysym('-'); |
| 1449 | break; |
| 1450 | case 0x4e: |
| 1451 | kbd_put_keysym('+'); |
| 1452 | break; |
| 1453 | case 0x9c: |
| 1454 | kbd_put_keysym('\n'); |
| 1455 | break; |
| 1456 | |
| 1457 | default: |
| 1458 | kbd_put_keysym(sym); |
| 1459 | break; |
| 1460 | } |
| 1461 | } |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | static void key_event(VncState *vs, int down, uint32_t sym) |
| 1466 | { |
| 1467 | int keycode; |
| 1468 | |
| 1469 | if (sym >= 'A' && sym <= 'Z' && is_graphic_console()) |
| 1470 | sym = sym - 'A' + 'a'; |
| 1471 | |
| 1472 | keycode = keysym2scancode(vs->vd->kbd_layout, sym & 0xFFFF); |
| 1473 | do_key_event(vs, down, keycode, sym); |
| 1474 | } |
| 1475 | |
| 1476 | static void ext_key_event(VncState *vs, int down, |
| 1477 | uint32_t sym, uint16_t keycode) |
| 1478 | { |
| 1479 | /* if the user specifies a keyboard layout, always use it */ |
| 1480 | if (keyboard_layout) |
| 1481 | key_event(vs, down, sym); |
| 1482 | else |
| 1483 | do_key_event(vs, down, keycode, sym); |
| 1484 | } |
| 1485 | |
| 1486 | static void framebuffer_update_request(VncState *vs, int incremental, |
| 1487 | int x_position, int y_position, |
| 1488 | int w, int h) |
| 1489 | { |
| 1490 | if (x_position > ds_get_width(vs->ds)) |
| 1491 | x_position = ds_get_width(vs->ds); |
| 1492 | if (y_position > ds_get_height(vs->ds)) |
| 1493 | y_position = ds_get_height(vs->ds); |
| 1494 | if (x_position + w >= ds_get_width(vs->ds)) |
| 1495 | w = ds_get_width(vs->ds) - x_position; |
| 1496 | if (y_position + h >= ds_get_height(vs->ds)) |
| 1497 | h = ds_get_height(vs->ds) - y_position; |
| 1498 | |
| 1499 | int i; |
| 1500 | vs->need_update = 1; |
| 1501 | if (!incremental) { |
| 1502 | vs->force_update = 1; |
| 1503 | for (i = 0; i < h; i++) { |
| 1504 | vnc_set_bits(vs->guest.dirty[y_position + i], |
| 1505 | (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS); |
| 1506 | vnc_set_bits(vs->server.dirty[y_position + i], |
| 1507 | (ds_get_width(vs->ds) / 16), VNC_DIRTY_WORDS); |
| 1508 | } |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | static void send_ext_key_event_ack(VncState *vs) |
| 1513 | { |
| 1514 | vnc_write_u8(vs, 0); |
| 1515 | vnc_write_u8(vs, 0); |
| 1516 | vnc_write_u16(vs, 1); |
| 1517 | vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds), |
| 1518 | VNC_ENCODING_EXT_KEY_EVENT); |
| 1519 | vnc_flush(vs); |
| 1520 | } |
| 1521 | |
| 1522 | static void send_ext_audio_ack(VncState *vs) |
| 1523 | { |
| 1524 | vnc_write_u8(vs, 0); |
| 1525 | vnc_write_u8(vs, 0); |
| 1526 | vnc_write_u16(vs, 1); |
| 1527 | vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), ds_get_height(vs->ds), |
| 1528 | VNC_ENCODING_AUDIO); |
| 1529 | vnc_flush(vs); |
| 1530 | } |
| 1531 | |
| 1532 | static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) |
| 1533 | { |
| 1534 | int i; |
| 1535 | unsigned int enc = 0; |
| 1536 | |
| 1537 | vnc_zlib_init(vs); |
| 1538 | vs->features = 0; |
| 1539 | vs->vnc_encoding = 0; |
| 1540 | vs->tight_compression = 9; |
| 1541 | vs->tight_quality = 9; |
| 1542 | vs->absolute = -1; |
| 1543 | |
| 1544 | for (i = n_encodings - 1; i >= 0; i--) { |
| 1545 | enc = encodings[i]; |
| 1546 | switch (enc) { |
| 1547 | case VNC_ENCODING_RAW: |
| 1548 | vs->vnc_encoding = enc; |
| 1549 | break; |
| 1550 | case VNC_ENCODING_COPYRECT: |
| 1551 | vs->features |= VNC_FEATURE_COPYRECT_MASK; |
| 1552 | break; |
| 1553 | case VNC_ENCODING_HEXTILE: |
| 1554 | vs->features |= VNC_FEATURE_HEXTILE_MASK; |
| 1555 | vs->vnc_encoding = enc; |
| 1556 | break; |
| 1557 | case VNC_ENCODING_ZLIB: |
| 1558 | vs->features |= VNC_FEATURE_ZLIB_MASK; |
| 1559 | vs->vnc_encoding = enc; |
| 1560 | break; |
| 1561 | case VNC_ENCODING_DESKTOPRESIZE: |
| 1562 | vs->features |= VNC_FEATURE_RESIZE_MASK; |
| 1563 | break; |
| 1564 | case VNC_ENCODING_POINTER_TYPE_CHANGE: |
| 1565 | vs->features |= VNC_FEATURE_POINTER_TYPE_CHANGE_MASK; |
| 1566 | break; |
| 1567 | case VNC_ENCODING_EXT_KEY_EVENT: |
| 1568 | send_ext_key_event_ack(vs); |
| 1569 | break; |
| 1570 | case VNC_ENCODING_AUDIO: |
| 1571 | send_ext_audio_ack(vs); |
| 1572 | break; |
| 1573 | case VNC_ENCODING_WMVi: |
| 1574 | vs->features |= VNC_FEATURE_WMVI_MASK; |
| 1575 | break; |
| 1576 | case VNC_ENCODING_COMPRESSLEVEL0 ... VNC_ENCODING_COMPRESSLEVEL0 + 9: |
| 1577 | vs->tight_compression = (enc & 0x0F); |
| 1578 | break; |
| 1579 | case VNC_ENCODING_QUALITYLEVEL0 ... VNC_ENCODING_QUALITYLEVEL0 + 9: |
| 1580 | vs->tight_quality = (enc & 0x0F); |
| 1581 | break; |
| 1582 | default: |
| 1583 | VNC_DEBUG("Unknown encoding: %d (0x%.8x): %d\n", i, enc, enc); |
| 1584 | break; |
| 1585 | } |
| 1586 | } |
| 1587 | |
| 1588 | check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 1589 | } |
| 1590 | |
| 1591 | static void set_pixel_conversion(VncState *vs) |
| 1592 | { |
| 1593 | if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) == |
Vladimir Chtchetkine | 7258f6b | 2010-07-14 10:04:01 -0700 | [diff] [blame] | 1594 | (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG) && |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 1595 | !memcmp(&(vs->clientds.pf), &(vs->ds->surface->pf), sizeof(PixelFormat))) { |
| 1596 | vs->write_pixels = vnc_write_pixels_copy; |
| 1597 | switch (vs->ds->surface->pf.bits_per_pixel) { |
| 1598 | case 8: |
| 1599 | vs->send_hextile_tile = send_hextile_tile_8; |
| 1600 | break; |
| 1601 | case 16: |
| 1602 | vs->send_hextile_tile = send_hextile_tile_16; |
| 1603 | break; |
| 1604 | case 32: |
| 1605 | vs->send_hextile_tile = send_hextile_tile_32; |
| 1606 | break; |
| 1607 | } |
| 1608 | } else { |
| 1609 | vs->write_pixels = vnc_write_pixels_generic; |
| 1610 | switch (vs->ds->surface->pf.bits_per_pixel) { |
| 1611 | case 8: |
| 1612 | vs->send_hextile_tile = send_hextile_tile_generic_8; |
| 1613 | break; |
| 1614 | case 16: |
| 1615 | vs->send_hextile_tile = send_hextile_tile_generic_16; |
| 1616 | break; |
| 1617 | case 32: |
| 1618 | vs->send_hextile_tile = send_hextile_tile_generic_32; |
| 1619 | break; |
| 1620 | } |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | static void set_pixel_format(VncState *vs, |
| 1625 | int bits_per_pixel, int depth, |
| 1626 | int big_endian_flag, int true_color_flag, |
| 1627 | int red_max, int green_max, int blue_max, |
| 1628 | int red_shift, int green_shift, int blue_shift) |
| 1629 | { |
| 1630 | if (!true_color_flag) { |
| 1631 | vnc_client_error(vs); |
| 1632 | return; |
| 1633 | } |
| 1634 | |
| 1635 | vs->clientds = *(vs->guest.ds); |
| 1636 | vs->clientds.pf.rmax = red_max; |
| 1637 | count_bits(vs->clientds.pf.rbits, red_max); |
| 1638 | vs->clientds.pf.rshift = red_shift; |
| 1639 | vs->clientds.pf.rmask = red_max << red_shift; |
| 1640 | vs->clientds.pf.gmax = green_max; |
| 1641 | count_bits(vs->clientds.pf.gbits, green_max); |
| 1642 | vs->clientds.pf.gshift = green_shift; |
| 1643 | vs->clientds.pf.gmask = green_max << green_shift; |
| 1644 | vs->clientds.pf.bmax = blue_max; |
| 1645 | count_bits(vs->clientds.pf.bbits, blue_max); |
| 1646 | vs->clientds.pf.bshift = blue_shift; |
| 1647 | vs->clientds.pf.bmask = blue_max << blue_shift; |
| 1648 | vs->clientds.pf.bits_per_pixel = bits_per_pixel; |
| 1649 | vs->clientds.pf.bytes_per_pixel = bits_per_pixel / 8; |
| 1650 | vs->clientds.pf.depth = bits_per_pixel == 32 ? 24 : bits_per_pixel; |
| 1651 | vs->clientds.flags = big_endian_flag ? QEMU_BIG_ENDIAN_FLAG : 0x00; |
| 1652 | |
| 1653 | set_pixel_conversion(vs); |
| 1654 | |
| 1655 | vga_hw_invalidate(); |
| 1656 | vga_hw_update(); |
| 1657 | } |
| 1658 | |
| 1659 | static void pixel_format_message (VncState *vs) { |
| 1660 | char pad[3] = { 0, 0, 0 }; |
| 1661 | |
| 1662 | vnc_write_u8(vs, vs->ds->surface->pf.bits_per_pixel); /* bits-per-pixel */ |
| 1663 | vnc_write_u8(vs, vs->ds->surface->pf.depth); /* depth */ |
| 1664 | |
David 'Digit' Turner | 20894ae | 2010-05-10 17:07:36 -0700 | [diff] [blame] | 1665 | #ifdef HOST_WORDS_BIGENDIAN |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 1666 | vnc_write_u8(vs, 1); /* big-endian-flag */ |
| 1667 | #else |
| 1668 | vnc_write_u8(vs, 0); /* big-endian-flag */ |
| 1669 | #endif |
| 1670 | vnc_write_u8(vs, 1); /* true-color-flag */ |
| 1671 | vnc_write_u16(vs, vs->ds->surface->pf.rmax); /* red-max */ |
| 1672 | vnc_write_u16(vs, vs->ds->surface->pf.gmax); /* green-max */ |
| 1673 | vnc_write_u16(vs, vs->ds->surface->pf.bmax); /* blue-max */ |
| 1674 | vnc_write_u8(vs, vs->ds->surface->pf.rshift); /* red-shift */ |
| 1675 | vnc_write_u8(vs, vs->ds->surface->pf.gshift); /* green-shift */ |
| 1676 | vnc_write_u8(vs, vs->ds->surface->pf.bshift); /* blue-shift */ |
| 1677 | if (vs->ds->surface->pf.bits_per_pixel == 32) |
| 1678 | vs->send_hextile_tile = send_hextile_tile_32; |
| 1679 | else if (vs->ds->surface->pf.bits_per_pixel == 16) |
| 1680 | vs->send_hextile_tile = send_hextile_tile_16; |
| 1681 | else if (vs->ds->surface->pf.bits_per_pixel == 8) |
| 1682 | vs->send_hextile_tile = send_hextile_tile_8; |
| 1683 | vs->clientds = *(vs->ds->surface); |
| 1684 | vs->clientds.flags &= ~QEMU_ALLOCATED_FLAG; |
| 1685 | vs->write_pixels = vnc_write_pixels_copy; |
| 1686 | |
| 1687 | vnc_write(vs, pad, 3); /* padding */ |
| 1688 | } |
| 1689 | |
| 1690 | static void vnc_dpy_setdata(DisplayState *ds) |
| 1691 | { |
| 1692 | /* We don't have to do anything */ |
| 1693 | } |
| 1694 | |
| 1695 | static void vnc_colordepth(VncState *vs) |
| 1696 | { |
| 1697 | if (vnc_has_feature(vs, VNC_FEATURE_WMVI)) { |
| 1698 | /* Sending a WMVi message to notify the client*/ |
| 1699 | vnc_write_u8(vs, 0); /* msg id */ |
| 1700 | vnc_write_u8(vs, 0); |
| 1701 | vnc_write_u16(vs, 1); /* number of rects */ |
Vladimir Chtchetkine | 7258f6b | 2010-07-14 10:04:01 -0700 | [diff] [blame] | 1702 | vnc_framebuffer_update(vs, 0, 0, ds_get_width(vs->ds), |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 1703 | ds_get_height(vs->ds), VNC_ENCODING_WMVi); |
| 1704 | pixel_format_message(vs); |
| 1705 | vnc_flush(vs); |
| 1706 | } else { |
| 1707 | set_pixel_conversion(vs); |
| 1708 | } |
| 1709 | } |
| 1710 | |
| 1711 | static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) |
| 1712 | { |
| 1713 | int i; |
| 1714 | uint16_t limit; |
| 1715 | |
| 1716 | switch (data[0]) { |
| 1717 | case 0: |
| 1718 | if (len == 1) |
| 1719 | return 20; |
| 1720 | |
| 1721 | set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5), |
| 1722 | read_u8(data, 6), read_u8(data, 7), |
| 1723 | read_u16(data, 8), read_u16(data, 10), |
| 1724 | read_u16(data, 12), read_u8(data, 14), |
| 1725 | read_u8(data, 15), read_u8(data, 16)); |
| 1726 | break; |
| 1727 | case 2: |
| 1728 | if (len == 1) |
| 1729 | return 4; |
| 1730 | |
| 1731 | if (len == 4) { |
| 1732 | limit = read_u16(data, 2); |
| 1733 | if (limit > 0) |
| 1734 | return 4 + (limit * 4); |
| 1735 | } else |
| 1736 | limit = read_u16(data, 2); |
| 1737 | |
| 1738 | for (i = 0; i < limit; i++) { |
| 1739 | int32_t val = read_s32(data, 4 + (i * 4)); |
| 1740 | memcpy(data + 4 + (i * 4), &val, sizeof(val)); |
| 1741 | } |
| 1742 | |
| 1743 | set_encodings(vs, (int32_t *)(data + 4), limit); |
| 1744 | break; |
| 1745 | case 3: |
| 1746 | if (len == 1) |
| 1747 | return 10; |
| 1748 | |
| 1749 | framebuffer_update_request(vs, |
| 1750 | read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), |
| 1751 | read_u16(data, 6), read_u16(data, 8)); |
| 1752 | break; |
| 1753 | case 4: |
| 1754 | if (len == 1) |
| 1755 | return 8; |
| 1756 | |
| 1757 | key_event(vs, read_u8(data, 1), read_u32(data, 4)); |
| 1758 | break; |
| 1759 | case 5: |
| 1760 | if (len == 1) |
| 1761 | return 6; |
| 1762 | |
| 1763 | pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); |
| 1764 | break; |
| 1765 | case 6: |
| 1766 | if (len == 1) |
| 1767 | return 8; |
| 1768 | |
| 1769 | if (len == 8) { |
| 1770 | uint32_t dlen = read_u32(data, 4); |
| 1771 | if (dlen > 0) |
| 1772 | return 8 + dlen; |
| 1773 | } |
| 1774 | |
| 1775 | client_cut_text(vs, read_u32(data, 4), data + 8); |
| 1776 | break; |
| 1777 | case 255: |
| 1778 | if (len == 1) |
| 1779 | return 2; |
| 1780 | |
| 1781 | switch (read_u8(data, 1)) { |
| 1782 | case 0: |
| 1783 | if (len == 2) |
| 1784 | return 12; |
| 1785 | |
| 1786 | ext_key_event(vs, read_u16(data, 2), |
| 1787 | read_u32(data, 4), read_u32(data, 8)); |
| 1788 | break; |
| 1789 | case 1: |
| 1790 | if (len == 2) |
| 1791 | return 4; |
| 1792 | |
| 1793 | switch (read_u16 (data, 2)) { |
| 1794 | case 0: |
| 1795 | audio_add(vs); |
| 1796 | break; |
| 1797 | case 1: |
| 1798 | audio_del(vs); |
| 1799 | break; |
| 1800 | case 2: |
| 1801 | if (len == 4) |
| 1802 | return 10; |
| 1803 | switch (read_u8(data, 4)) { |
| 1804 | case 0: vs->as.fmt = AUD_FMT_U8; break; |
| 1805 | case 1: vs->as.fmt = AUD_FMT_S8; break; |
| 1806 | case 2: vs->as.fmt = AUD_FMT_U16; break; |
| 1807 | case 3: vs->as.fmt = AUD_FMT_S16; break; |
| 1808 | case 4: vs->as.fmt = AUD_FMT_U32; break; |
| 1809 | case 5: vs->as.fmt = AUD_FMT_S32; break; |
| 1810 | default: |
| 1811 | printf("Invalid audio format %d\n", read_u8(data, 4)); |
| 1812 | vnc_client_error(vs); |
| 1813 | break; |
| 1814 | } |
| 1815 | vs->as.nchannels = read_u8(data, 5); |
| 1816 | if (vs->as.nchannels != 1 && vs->as.nchannels != 2) { |
| 1817 | printf("Invalid audio channel coount %d\n", |
| 1818 | read_u8(data, 5)); |
| 1819 | vnc_client_error(vs); |
| 1820 | break; |
| 1821 | } |
| 1822 | vs->as.freq = read_u32(data, 6); |
| 1823 | break; |
| 1824 | default: |
| 1825 | printf ("Invalid audio message %d\n", read_u8(data, 4)); |
| 1826 | vnc_client_error(vs); |
| 1827 | break; |
| 1828 | } |
| 1829 | break; |
| 1830 | |
| 1831 | default: |
| 1832 | printf("Msg: %d\n", read_u16(data, 0)); |
| 1833 | vnc_client_error(vs); |
| 1834 | break; |
| 1835 | } |
| 1836 | break; |
| 1837 | default: |
| 1838 | printf("Msg: %d\n", data[0]); |
| 1839 | vnc_client_error(vs); |
| 1840 | break; |
| 1841 | } |
| 1842 | |
| 1843 | vnc_read_when(vs, protocol_client_msg, 1); |
| 1844 | return 0; |
| 1845 | } |
| 1846 | |
| 1847 | static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) |
| 1848 | { |
| 1849 | char buf[1024]; |
| 1850 | int size; |
| 1851 | |
| 1852 | vnc_write_u16(vs, ds_get_width(vs->ds)); |
| 1853 | vnc_write_u16(vs, ds_get_height(vs->ds)); |
| 1854 | |
| 1855 | pixel_format_message(vs); |
| 1856 | |
| 1857 | if (qemu_name) |
| 1858 | size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); |
| 1859 | else |
| 1860 | size = snprintf(buf, sizeof(buf), "QEMU"); |
| 1861 | |
| 1862 | vnc_write_u32(vs, size); |
| 1863 | vnc_write(vs, buf, size); |
| 1864 | vnc_flush(vs); |
| 1865 | |
| 1866 | vnc_read_when(vs, protocol_client_msg, 1); |
| 1867 | |
| 1868 | return 0; |
| 1869 | } |
| 1870 | |
| 1871 | void start_client_init(VncState *vs) |
| 1872 | { |
| 1873 | vnc_read_when(vs, protocol_client_init, 1); |
| 1874 | } |
| 1875 | |
| 1876 | static void make_challenge(VncState *vs) |
| 1877 | { |
| 1878 | int i; |
| 1879 | |
| 1880 | srand(time(NULL)+getpid()+getpid()*987654+rand()); |
| 1881 | |
| 1882 | for (i = 0 ; i < sizeof(vs->challenge) ; i++) |
| 1883 | vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); |
| 1884 | } |
| 1885 | |
| 1886 | static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) |
| 1887 | { |
| 1888 | unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; |
| 1889 | int i, j, pwlen; |
| 1890 | unsigned char key[8]; |
| 1891 | |
| 1892 | if (!vs->vd->password || !vs->vd->password[0]) { |
| 1893 | VNC_DEBUG("No password configured on server"); |
| 1894 | vnc_write_u32(vs, 1); /* Reject auth */ |
| 1895 | if (vs->minor >= 8) { |
| 1896 | static const char err[] = "Authentication failed"; |
| 1897 | vnc_write_u32(vs, sizeof(err)); |
| 1898 | vnc_write(vs, err, sizeof(err)); |
| 1899 | } |
| 1900 | vnc_flush(vs); |
| 1901 | vnc_client_error(vs); |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
| 1905 | memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); |
| 1906 | |
| 1907 | /* Calculate the expected challenge response */ |
| 1908 | pwlen = strlen(vs->vd->password); |
| 1909 | for (i=0; i<sizeof(key); i++) |
| 1910 | key[i] = i<pwlen ? vs->vd->password[i] : 0; |
| 1911 | deskey(key, EN0); |
| 1912 | for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8) |
| 1913 | des(response+j, response+j); |
| 1914 | |
| 1915 | /* Compare expected vs actual challenge response */ |
| 1916 | if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
| 1917 | VNC_DEBUG("Client challenge reponse did not match\n"); |
| 1918 | vnc_write_u32(vs, 1); /* Reject auth */ |
| 1919 | if (vs->minor >= 8) { |
| 1920 | static const char err[] = "Authentication failed"; |
| 1921 | vnc_write_u32(vs, sizeof(err)); |
| 1922 | vnc_write(vs, err, sizeof(err)); |
| 1923 | } |
| 1924 | vnc_flush(vs); |
| 1925 | vnc_client_error(vs); |
| 1926 | } else { |
| 1927 | VNC_DEBUG("Accepting VNC challenge response\n"); |
| 1928 | vnc_write_u32(vs, 0); /* Accept auth */ |
| 1929 | vnc_flush(vs); |
| 1930 | |
| 1931 | start_client_init(vs); |
| 1932 | } |
| 1933 | return 0; |
| 1934 | } |
| 1935 | |
| 1936 | void start_auth_vnc(VncState *vs) |
| 1937 | { |
| 1938 | make_challenge(vs); |
| 1939 | /* Send client a 'random' challenge */ |
| 1940 | vnc_write(vs, vs->challenge, sizeof(vs->challenge)); |
| 1941 | vnc_flush(vs); |
| 1942 | |
| 1943 | vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); |
| 1944 | } |
| 1945 | |
| 1946 | |
| 1947 | static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) |
| 1948 | { |
| 1949 | /* We only advertise 1 auth scheme at a time, so client |
| 1950 | * must pick the one we sent. Verify this */ |
| 1951 | if (data[0] != vs->vd->auth) { /* Reject auth */ |
| 1952 | VNC_DEBUG("Reject auth %d because it didn't match advertized\n", (int)data[0]); |
| 1953 | vnc_write_u32(vs, 1); |
| 1954 | if (vs->minor >= 8) { |
| 1955 | static const char err[] = "Authentication failed"; |
| 1956 | vnc_write_u32(vs, sizeof(err)); |
| 1957 | vnc_write(vs, err, sizeof(err)); |
| 1958 | } |
| 1959 | vnc_client_error(vs); |
| 1960 | } else { /* Accept requested auth */ |
| 1961 | VNC_DEBUG("Client requested auth %d\n", (int)data[0]); |
| 1962 | switch (vs->vd->auth) { |
| 1963 | case VNC_AUTH_NONE: |
| 1964 | VNC_DEBUG("Accept auth none\n"); |
| 1965 | if (vs->minor >= 8) { |
| 1966 | vnc_write_u32(vs, 0); /* Accept auth completion */ |
| 1967 | vnc_flush(vs); |
| 1968 | } |
| 1969 | start_client_init(vs); |
| 1970 | break; |
| 1971 | |
| 1972 | case VNC_AUTH_VNC: |
| 1973 | VNC_DEBUG("Start VNC auth\n"); |
| 1974 | start_auth_vnc(vs); |
| 1975 | break; |
| 1976 | |
| 1977 | #ifdef CONFIG_VNC_TLS |
| 1978 | case VNC_AUTH_VENCRYPT: |
| 1979 | VNC_DEBUG("Accept VeNCrypt auth\n");; |
| 1980 | start_auth_vencrypt(vs); |
| 1981 | break; |
| 1982 | #endif /* CONFIG_VNC_TLS */ |
| 1983 | |
| 1984 | #ifdef CONFIG_VNC_SASL |
| 1985 | case VNC_AUTH_SASL: |
| 1986 | VNC_DEBUG("Accept SASL auth\n"); |
| 1987 | start_auth_sasl(vs); |
| 1988 | break; |
| 1989 | #endif /* CONFIG_VNC_SASL */ |
| 1990 | |
| 1991 | default: /* Should not be possible, but just in case */ |
| 1992 | VNC_DEBUG("Reject auth %d server code bug\n", vs->vd->auth); |
| 1993 | vnc_write_u8(vs, 1); |
| 1994 | if (vs->minor >= 8) { |
| 1995 | static const char err[] = "Authentication failed"; |
| 1996 | vnc_write_u32(vs, sizeof(err)); |
| 1997 | vnc_write(vs, err, sizeof(err)); |
| 1998 | } |
| 1999 | vnc_client_error(vs); |
| 2000 | } |
| 2001 | } |
| 2002 | return 0; |
| 2003 | } |
| 2004 | |
| 2005 | static int protocol_version(VncState *vs, uint8_t *version, size_t len) |
| 2006 | { |
| 2007 | char local[13]; |
| 2008 | |
| 2009 | memcpy(local, version, 12); |
| 2010 | local[12] = 0; |
| 2011 | |
| 2012 | if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { |
| 2013 | VNC_DEBUG("Malformed protocol version %s\n", local); |
| 2014 | vnc_client_error(vs); |
| 2015 | return 0; |
| 2016 | } |
| 2017 | VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); |
| 2018 | if (vs->major != 3 || |
| 2019 | (vs->minor != 3 && |
| 2020 | vs->minor != 4 && |
| 2021 | vs->minor != 5 && |
| 2022 | vs->minor != 7 && |
| 2023 | vs->minor != 8)) { |
| 2024 | VNC_DEBUG("Unsupported client version\n"); |
| 2025 | vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 2026 | vnc_flush(vs); |
| 2027 | vnc_client_error(vs); |
| 2028 | return 0; |
| 2029 | } |
| 2030 | /* Some broken clients report v3.4 or v3.5, which spec requires to be treated |
| 2031 | * as equivalent to v3.3 by servers |
| 2032 | */ |
| 2033 | if (vs->minor == 4 || vs->minor == 5) |
| 2034 | vs->minor = 3; |
| 2035 | |
| 2036 | if (vs->minor == 3) { |
| 2037 | if (vs->vd->auth == VNC_AUTH_NONE) { |
| 2038 | VNC_DEBUG("Tell client auth none\n"); |
| 2039 | vnc_write_u32(vs, vs->vd->auth); |
| 2040 | vnc_flush(vs); |
| 2041 | start_client_init(vs); |
| 2042 | } else if (vs->vd->auth == VNC_AUTH_VNC) { |
| 2043 | VNC_DEBUG("Tell client VNC auth\n"); |
| 2044 | vnc_write_u32(vs, vs->vd->auth); |
| 2045 | vnc_flush(vs); |
| 2046 | start_auth_vnc(vs); |
| 2047 | } else { |
| 2048 | VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->vd->auth); |
| 2049 | vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 2050 | vnc_flush(vs); |
| 2051 | vnc_client_error(vs); |
| 2052 | } |
| 2053 | } else { |
| 2054 | VNC_DEBUG("Telling client we support auth %d\n", vs->vd->auth); |
| 2055 | vnc_write_u8(vs, 1); /* num auth */ |
| 2056 | vnc_write_u8(vs, vs->vd->auth); |
| 2057 | vnc_read_when(vs, protocol_client_auth, 1); |
| 2058 | vnc_flush(vs); |
| 2059 | } |
| 2060 | |
| 2061 | return 0; |
| 2062 | } |
| 2063 | |
| 2064 | static void vnc_connect(VncDisplay *vd, int csock) |
| 2065 | { |
| 2066 | VncState *vs = qemu_mallocz(sizeof(VncState)); |
| 2067 | vs->csock = csock; |
| 2068 | |
| 2069 | VNC_DEBUG("New client on socket %d\n", csock); |
| 2070 | dcl->idle = 0; |
| 2071 | socket_set_nonblock(vs->csock); |
| 2072 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 2073 | |
| 2074 | vs->vd = vd; |
| 2075 | vs->ds = vd->ds; |
David 'Digit' Turner | 5973c77 | 2011-05-10 07:06:00 +0200 | [diff] [blame] | 2076 | vs->timer = qemu_new_timer_ms(rt_clock, vnc_update_client, vs); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 2077 | vs->last_x = -1; |
| 2078 | vs->last_y = -1; |
| 2079 | |
| 2080 | vs->as.freq = 44100; |
| 2081 | vs->as.nchannels = 2; |
| 2082 | vs->as.fmt = AUD_FMT_S16; |
| 2083 | vs->as.endianness = 0; |
| 2084 | |
| 2085 | vnc_resize(vs); |
| 2086 | vnc_write(vs, "RFB 003.008\n", 12); |
| 2087 | vnc_flush(vs); |
| 2088 | vnc_read_when(vs, protocol_version, 12); |
| 2089 | reset_keys(vs); |
| 2090 | |
| 2091 | vs->next = vd->clients; |
| 2092 | vd->clients = vs; |
| 2093 | |
| 2094 | vnc_update_client(vs); |
| 2095 | /* vs might be free()ed here */ |
| 2096 | } |
| 2097 | |
| 2098 | static void vnc_listen_read(void *opaque) |
| 2099 | { |
| 2100 | VncDisplay *vs = opaque; |
| 2101 | |
| 2102 | /* Catch-up */ |
| 2103 | vga_hw_update(); |
| 2104 | |
| 2105 | int csock = socket_accept(vs->lsock, NULL); |
| 2106 | if (csock != -1) { |
| 2107 | vnc_connect(vs, csock); |
| 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | void vnc_display_init(DisplayState *ds) |
| 2112 | { |
| 2113 | VncDisplay *vs = qemu_mallocz(sizeof(*vs)); |
| 2114 | |
| 2115 | dcl = qemu_mallocz(sizeof(DisplayChangeListener)); |
| 2116 | |
| 2117 | ds->opaque = vs; |
| 2118 | dcl->idle = 1; |
| 2119 | vnc_display = vs; |
| 2120 | |
| 2121 | vs->lsock = -1; |
| 2122 | |
| 2123 | vs->ds = ds; |
| 2124 | |
| 2125 | if (keyboard_layout) |
| 2126 | vs->kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout); |
| 2127 | else |
| 2128 | vs->kbd_layout = init_keyboard_layout(name2keysym, "en-us"); |
| 2129 | |
| 2130 | if (!vs->kbd_layout) |
| 2131 | exit(1); |
| 2132 | |
| 2133 | dcl->dpy_copy = vnc_dpy_copy; |
| 2134 | dcl->dpy_update = vnc_dpy_update; |
| 2135 | dcl->dpy_resize = vnc_dpy_resize; |
| 2136 | dcl->dpy_setdata = vnc_dpy_setdata; |
| 2137 | register_displaychangelistener(ds, dcl); |
| 2138 | } |
| 2139 | |
| 2140 | |
| 2141 | void vnc_display_close(DisplayState *ds) |
| 2142 | { |
| 2143 | VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; |
| 2144 | |
| 2145 | if (!vs) |
| 2146 | return; |
| 2147 | if (vs->display) { |
| 2148 | qemu_free(vs->display); |
| 2149 | vs->display = NULL; |
| 2150 | } |
| 2151 | if (vs->lsock != -1) { |
| 2152 | qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL); |
| 2153 | close(vs->lsock); |
| 2154 | vs->lsock = -1; |
| 2155 | } |
| 2156 | vs->auth = VNC_AUTH_INVALID; |
| 2157 | #ifdef CONFIG_VNC_TLS |
| 2158 | vs->subauth = VNC_AUTH_INVALID; |
| 2159 | vs->tls.x509verify = 0; |
| 2160 | #endif |
| 2161 | } |
| 2162 | |
| 2163 | int vnc_display_password(DisplayState *ds, const char *password) |
| 2164 | { |
| 2165 | VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; |
| 2166 | |
| 2167 | if (vs->password) { |
| 2168 | qemu_free(vs->password); |
| 2169 | vs->password = NULL; |
| 2170 | } |
| 2171 | if (password && password[0]) { |
| 2172 | if (!(vs->password = qemu_strdup(password))) |
| 2173 | return -1; |
| 2174 | } |
| 2175 | |
| 2176 | return 0; |
| 2177 | } |
| 2178 | |
| 2179 | char *vnc_display_local_addr(DisplayState *ds) |
| 2180 | { |
| 2181 | VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; |
Vladimir Chtchetkine | 7258f6b | 2010-07-14 10:04:01 -0700 | [diff] [blame] | 2182 | |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 2183 | return vnc_socket_local_addr("%s:%s", vs->lsock); |
| 2184 | } |
| 2185 | |
| 2186 | int vnc_display_open(DisplayState *ds, const char *display) |
| 2187 | { |
| 2188 | VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display; |
| 2189 | const char *options; |
| 2190 | int password = 0; |
| 2191 | int reverse = 0; |
| 2192 | int to_port = 0; |
| 2193 | #ifdef CONFIG_VNC_TLS |
| 2194 | int tls = 0, x509 = 0; |
| 2195 | #endif |
| 2196 | #ifdef CONFIG_VNC_SASL |
| 2197 | int sasl = 0; |
| 2198 | int saslErr; |
| 2199 | #endif |
| 2200 | int acl = 0; |
| 2201 | |
| 2202 | if (!vnc_display) |
| 2203 | return -1; |
| 2204 | vnc_display_close(ds); |
| 2205 | if (strcmp(display, "none") == 0) |
| 2206 | return 0; |
| 2207 | |
| 2208 | if (!(vs->display = strdup(display))) |
| 2209 | return -1; |
| 2210 | |
| 2211 | options = display; |
| 2212 | while ((options = strchr(options, ','))) { |
| 2213 | options++; |
| 2214 | if (strncmp(options, "password", 8) == 0) { |
| 2215 | password = 1; /* Require password auth */ |
| 2216 | } else if (strncmp(options, "reverse", 7) == 0) { |
| 2217 | reverse = 1; |
| 2218 | } else if (strncmp(options, "to=", 3) == 0) { |
| 2219 | to_port = atoi(options+3) + 5900; |
| 2220 | #ifdef CONFIG_VNC_SASL |
| 2221 | } else if (strncmp(options, "sasl", 4) == 0) { |
| 2222 | sasl = 1; /* Require SASL auth */ |
| 2223 | #endif |
| 2224 | #ifdef CONFIG_VNC_TLS |
| 2225 | } else if (strncmp(options, "tls", 3) == 0) { |
| 2226 | tls = 1; /* Require TLS */ |
| 2227 | } else if (strncmp(options, "x509", 4) == 0) { |
| 2228 | char *start, *end; |
| 2229 | x509 = 1; /* Require x509 certificates */ |
| 2230 | if (strncmp(options, "x509verify", 10) == 0) |
| 2231 | vs->tls.x509verify = 1; /* ...and verify client certs */ |
| 2232 | |
| 2233 | /* Now check for 'x509=/some/path' postfix |
| 2234 | * and use that to setup x509 certificate/key paths */ |
| 2235 | start = strchr(options, '='); |
| 2236 | end = strchr(options, ','); |
| 2237 | if (start && (!end || (start < end))) { |
| 2238 | int len = end ? end-(start+1) : strlen(start+1); |
| 2239 | char *path = qemu_strndup(start + 1, len); |
| 2240 | |
| 2241 | VNC_DEBUG("Trying certificate path '%s'\n", path); |
| 2242 | if (vnc_tls_set_x509_creds_dir(vs, path) < 0) { |
| 2243 | fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path); |
| 2244 | qemu_free(path); |
| 2245 | qemu_free(vs->display); |
| 2246 | vs->display = NULL; |
| 2247 | return -1; |
| 2248 | } |
| 2249 | qemu_free(path); |
| 2250 | } else { |
| 2251 | fprintf(stderr, "No certificate path provided\n"); |
| 2252 | qemu_free(vs->display); |
| 2253 | vs->display = NULL; |
| 2254 | return -1; |
| 2255 | } |
| 2256 | #endif |
| 2257 | } else if (strncmp(options, "acl", 3) == 0) { |
| 2258 | acl = 1; |
| 2259 | } |
| 2260 | } |
| 2261 | |
| 2262 | #ifdef CONFIG_VNC_TLS |
| 2263 | if (acl && x509 && vs->tls.x509verify) { |
| 2264 | if (!(vs->tls.acl = qemu_acl_init("vnc.x509dname"))) { |
| 2265 | fprintf(stderr, "Failed to create x509 dname ACL\n"); |
| 2266 | exit(1); |
| 2267 | } |
| 2268 | } |
| 2269 | #endif |
| 2270 | #ifdef CONFIG_VNC_SASL |
| 2271 | if (acl && sasl) { |
| 2272 | if (!(vs->sasl.acl = qemu_acl_init("vnc.username"))) { |
| 2273 | fprintf(stderr, "Failed to create username ACL\n"); |
| 2274 | exit(1); |
| 2275 | } |
| 2276 | } |
| 2277 | #endif |
| 2278 | |
| 2279 | /* |
| 2280 | * Combinations we support here: |
| 2281 | * |
| 2282 | * - no-auth (clear text, no auth) |
| 2283 | * - password (clear text, weak auth) |
| 2284 | * - sasl (encrypt, good auth *IF* using Kerberos via GSSAPI) |
| 2285 | * - tls (encrypt, weak anonymous creds, no auth) |
| 2286 | * - tls + password (encrypt, weak anonymous creds, weak auth) |
| 2287 | * - tls + sasl (encrypt, weak anonymous creds, good auth) |
| 2288 | * - tls + x509 (encrypt, good x509 creds, no auth) |
| 2289 | * - tls + x509 + password (encrypt, good x509 creds, weak auth) |
| 2290 | * - tls + x509 + sasl (encrypt, good x509 creds, good auth) |
| 2291 | * |
| 2292 | * NB1. TLS is a stackable auth scheme. |
| 2293 | * NB2. the x509 schemes have option to validate a client cert dname |
| 2294 | */ |
| 2295 | if (password) { |
| 2296 | #ifdef CONFIG_VNC_TLS |
| 2297 | if (tls) { |
| 2298 | vs->auth = VNC_AUTH_VENCRYPT; |
| 2299 | if (x509) { |
| 2300 | VNC_DEBUG("Initializing VNC server with x509 password auth\n"); |
| 2301 | vs->subauth = VNC_AUTH_VENCRYPT_X509VNC; |
| 2302 | } else { |
| 2303 | VNC_DEBUG("Initializing VNC server with TLS password auth\n"); |
| 2304 | vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC; |
| 2305 | } |
| 2306 | } else { |
| 2307 | #endif /* CONFIG_VNC_TLS */ |
| 2308 | VNC_DEBUG("Initializing VNC server with password auth\n"); |
| 2309 | vs->auth = VNC_AUTH_VNC; |
| 2310 | #ifdef CONFIG_VNC_TLS |
| 2311 | vs->subauth = VNC_AUTH_INVALID; |
| 2312 | } |
| 2313 | #endif /* CONFIG_VNC_TLS */ |
| 2314 | #ifdef CONFIG_VNC_SASL |
| 2315 | } else if (sasl) { |
| 2316 | #ifdef CONFIG_VNC_TLS |
| 2317 | if (tls) { |
| 2318 | vs->auth = VNC_AUTH_VENCRYPT; |
| 2319 | if (x509) { |
| 2320 | VNC_DEBUG("Initializing VNC server with x509 SASL auth\n"); |
| 2321 | vs->subauth = VNC_AUTH_VENCRYPT_X509SASL; |
| 2322 | } else { |
| 2323 | VNC_DEBUG("Initializing VNC server with TLS SASL auth\n"); |
| 2324 | vs->subauth = VNC_AUTH_VENCRYPT_TLSSASL; |
| 2325 | } |
| 2326 | } else { |
| 2327 | #endif /* CONFIG_VNC_TLS */ |
| 2328 | VNC_DEBUG("Initializing VNC server with SASL auth\n"); |
| 2329 | vs->auth = VNC_AUTH_SASL; |
| 2330 | #ifdef CONFIG_VNC_TLS |
| 2331 | vs->subauth = VNC_AUTH_INVALID; |
| 2332 | } |
| 2333 | #endif /* CONFIG_VNC_TLS */ |
| 2334 | #endif /* CONFIG_VNC_SASL */ |
| 2335 | } else { |
| 2336 | #ifdef CONFIG_VNC_TLS |
| 2337 | if (tls) { |
| 2338 | vs->auth = VNC_AUTH_VENCRYPT; |
| 2339 | if (x509) { |
| 2340 | VNC_DEBUG("Initializing VNC server with x509 no auth\n"); |
| 2341 | vs->subauth = VNC_AUTH_VENCRYPT_X509NONE; |
| 2342 | } else { |
| 2343 | VNC_DEBUG("Initializing VNC server with TLS no auth\n"); |
| 2344 | vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE; |
| 2345 | } |
| 2346 | } else { |
| 2347 | #endif |
| 2348 | VNC_DEBUG("Initializing VNC server with no auth\n"); |
| 2349 | vs->auth = VNC_AUTH_NONE; |
| 2350 | #ifdef CONFIG_VNC_TLS |
| 2351 | vs->subauth = VNC_AUTH_INVALID; |
| 2352 | } |
| 2353 | #endif |
| 2354 | } |
| 2355 | |
| 2356 | #ifdef CONFIG_VNC_SASL |
| 2357 | if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) { |
| 2358 | fprintf(stderr, "Failed to initialize SASL auth %s", |
| 2359 | sasl_errstring(saslErr, NULL, NULL)); |
| 2360 | free(vs->display); |
| 2361 | vs->display = NULL; |
| 2362 | return -1; |
| 2363 | } |
| 2364 | #endif |
| 2365 | |
| 2366 | if (reverse) { |
| 2367 | /* connect to viewer */ |
| 2368 | if (strncmp(display, "unix:", 5) == 0) |
| 2369 | vs->lsock = unix_connect(display+5); |
| 2370 | else |
| 2371 | vs->lsock = inet_connect(display, SOCKET_STREAM); |
| 2372 | if (-1 == vs->lsock) { |
| 2373 | free(vs->display); |
| 2374 | vs->display = NULL; |
| 2375 | return -1; |
| 2376 | } else { |
| 2377 | int csock = vs->lsock; |
| 2378 | vs->lsock = -1; |
| 2379 | vnc_connect(vs, csock); |
| 2380 | } |
| 2381 | return 0; |
| 2382 | |
| 2383 | } else { |
| 2384 | /* listen for connects */ |
| 2385 | char *dpy; |
| 2386 | dpy = qemu_malloc(256); |
| 2387 | if (strncmp(display, "unix:", 5) == 0) { |
| 2388 | pstrcpy(dpy, 256, "unix:"); |
| 2389 | vs->lsock = unix_listen(display+5, dpy+5, 256-5); |
| 2390 | } else { |
| 2391 | vs->lsock = inet_listen(display, dpy, 256, SOCKET_STREAM, 5900); |
| 2392 | } |
| 2393 | if (-1 == vs->lsock) { |
| 2394 | free(dpy); |
| 2395 | return -1; |
| 2396 | } else { |
| 2397 | free(vs->display); |
| 2398 | vs->display = dpy; |
| 2399 | } |
| 2400 | } |
| 2401 | return qemu_set_fd_handler2(vs->lsock, NULL, vnc_listen_read, NULL, vs); |
| 2402 | } |