The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [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 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #include "qemu-common.h" |
| 27 | #include "console.h" |
| 28 | #include "sysemu.h" |
| 29 | #include "qemu_socket.h" |
| 30 | #include "qemu-timer.h" |
| 31 | |
| 32 | #define VNC_REFRESH_INTERVAL (1000 / 30) |
| 33 | |
| 34 | #include "vnc_keysym.h" |
| 35 | #include "keymaps.c" |
| 36 | #include "d3des.h" |
| 37 | |
| 38 | #ifdef CONFIG_VNC_TLS |
| 39 | #include <gnutls/gnutls.h> |
| 40 | #include <gnutls/x509.h> |
| 41 | #endif /* CONFIG_VNC_TLS */ |
| 42 | |
| 43 | // #define _VNC_DEBUG 1 |
| 44 | |
| 45 | #ifdef _VNC_DEBUG |
| 46 | #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| 47 | |
| 48 | #if CONFIG_VNC_TLS && _VNC_DEBUG >= 2 |
| 49 | /* Very verbose, so only enabled for _VNC_DEBUG >= 2 */ |
| 50 | static void vnc_debug_gnutls_log(int level, const char* str) { |
| 51 | VNC_DEBUG("%d %s", level, str); |
| 52 | } |
| 53 | #endif /* CONFIG_VNC_TLS && _VNC_DEBUG */ |
| 54 | #else |
| 55 | #define VNC_DEBUG(fmt, ...) do { } while (0) |
| 56 | #endif |
| 57 | |
| 58 | |
| 59 | typedef struct Buffer |
| 60 | { |
| 61 | size_t capacity; |
| 62 | size_t offset; |
| 63 | uint8_t *buffer; |
| 64 | } Buffer; |
| 65 | |
| 66 | typedef struct VncState VncState; |
| 67 | |
| 68 | typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len); |
| 69 | |
| 70 | typedef void VncWritePixels(VncState *vs, void *data, int size); |
| 71 | |
| 72 | typedef void VncSendHextileTile(VncState *vs, |
| 73 | int x, int y, int w, int h, |
| 74 | void *last_bg, |
| 75 | void *last_fg, |
| 76 | int *has_bg, int *has_fg); |
| 77 | |
| 78 | #define VNC_MAX_WIDTH 2048 |
| 79 | #define VNC_MAX_HEIGHT 2048 |
| 80 | #define VNC_DIRTY_WORDS (VNC_MAX_WIDTH / (16 * 32)) |
| 81 | |
| 82 | #define VNC_AUTH_CHALLENGE_SIZE 16 |
| 83 | |
| 84 | enum { |
| 85 | VNC_AUTH_INVALID = 0, |
| 86 | VNC_AUTH_NONE = 1, |
| 87 | VNC_AUTH_VNC = 2, |
| 88 | VNC_AUTH_RA2 = 5, |
| 89 | VNC_AUTH_RA2NE = 6, |
| 90 | VNC_AUTH_TIGHT = 16, |
| 91 | VNC_AUTH_ULTRA = 17, |
| 92 | VNC_AUTH_TLS = 18, |
| 93 | VNC_AUTH_VENCRYPT = 19 |
| 94 | }; |
| 95 | |
| 96 | #ifdef CONFIG_VNC_TLS |
| 97 | enum { |
| 98 | VNC_WIREMODE_CLEAR, |
| 99 | VNC_WIREMODE_TLS, |
| 100 | }; |
| 101 | |
| 102 | enum { |
| 103 | VNC_AUTH_VENCRYPT_PLAIN = 256, |
| 104 | VNC_AUTH_VENCRYPT_TLSNONE = 257, |
| 105 | VNC_AUTH_VENCRYPT_TLSVNC = 258, |
| 106 | VNC_AUTH_VENCRYPT_TLSPLAIN = 259, |
| 107 | VNC_AUTH_VENCRYPT_X509NONE = 260, |
| 108 | VNC_AUTH_VENCRYPT_X509VNC = 261, |
| 109 | VNC_AUTH_VENCRYPT_X509PLAIN = 262, |
| 110 | }; |
| 111 | |
| 112 | #define X509_CA_CERT_FILE "ca-cert.pem" |
| 113 | #define X509_CA_CRL_FILE "ca-crl.pem" |
| 114 | #define X509_SERVER_KEY_FILE "server-key.pem" |
| 115 | #define X509_SERVER_CERT_FILE "server-cert.pem" |
| 116 | |
| 117 | #endif /* CONFIG_VNC_TLS */ |
| 118 | |
| 119 | struct VncState |
| 120 | { |
| 121 | QEMUTimer *timer; |
| 122 | int lsock; |
| 123 | int csock; |
| 124 | DisplayState *ds; |
| 125 | int need_update; |
| 126 | int width; |
| 127 | int height; |
| 128 | uint32_t dirty_row[VNC_MAX_HEIGHT][VNC_DIRTY_WORDS]; |
| 129 | char *old_data; |
| 130 | int depth; /* internal VNC frame buffer byte per pixel */ |
| 131 | int has_resize; |
| 132 | int has_hextile; |
| 133 | int has_pointer_type_change; |
| 134 | int has_WMVi; |
| 135 | int absolute; |
| 136 | int last_x; |
| 137 | int last_y; |
| 138 | |
| 139 | int major; |
| 140 | int minor; |
| 141 | |
| 142 | char *display; |
| 143 | char *password; |
| 144 | int auth; |
| 145 | #ifdef CONFIG_VNC_TLS |
| 146 | int subauth; |
| 147 | int x509verify; |
| 148 | |
| 149 | char *x509cacert; |
| 150 | char *x509cacrl; |
| 151 | char *x509cert; |
| 152 | char *x509key; |
| 153 | #endif |
| 154 | char challenge[VNC_AUTH_CHALLENGE_SIZE]; |
| 155 | |
| 156 | #ifdef CONFIG_VNC_TLS |
| 157 | int wiremode; |
| 158 | gnutls_session_t tls_session; |
| 159 | #endif |
| 160 | |
| 161 | Buffer output; |
| 162 | Buffer input; |
| 163 | kbd_layout_t *kbd_layout; |
| 164 | /* current output mode information */ |
| 165 | VncWritePixels *write_pixels; |
| 166 | VncSendHextileTile *send_hextile_tile; |
| 167 | int pix_bpp, pix_big_endian; |
| 168 | int client_red_shift, client_red_max, server_red_shift, server_red_max; |
| 169 | int client_green_shift, client_green_max, server_green_shift, server_green_max; |
| 170 | int client_blue_shift, client_blue_max, server_blue_shift, server_blue_max; |
| 171 | |
| 172 | VncReadEvent *read_handler; |
| 173 | size_t read_handler_expect; |
| 174 | /* input */ |
| 175 | uint8_t modifiers_state[256]; |
| 176 | }; |
| 177 | |
| 178 | static VncState *vnc_state; /* needed for info vnc */ |
| 179 | |
| 180 | void do_info_vnc(void) |
| 181 | { |
| 182 | if (vnc_state == NULL) |
| 183 | term_printf("VNC server disabled\n"); |
| 184 | else { |
| 185 | term_printf("VNC server active on: "); |
| 186 | term_print_filename(vnc_state->display); |
| 187 | term_printf("\n"); |
| 188 | |
| 189 | if (vnc_state->csock == -1) |
| 190 | term_printf("No client connected\n"); |
| 191 | else |
| 192 | term_printf("Client connected\n"); |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | /* TODO |
| 197 | 1) Get the queue working for IO. |
| 198 | 2) there is some weirdness when using the -S option (the screen is grey |
| 199 | and not totally invalidated |
| 200 | 3) resolutions > 1024 |
| 201 | */ |
| 202 | |
| 203 | static void vnc_write(VncState *vs, const void *data, size_t len); |
| 204 | static void vnc_write_u32(VncState *vs, uint32_t value); |
| 205 | static void vnc_write_s32(VncState *vs, int32_t value); |
| 206 | static void vnc_write_u16(VncState *vs, uint16_t value); |
| 207 | static void vnc_write_u8(VncState *vs, uint8_t value); |
| 208 | static void vnc_flush(VncState *vs); |
| 209 | static void vnc_update_client(void *opaque); |
| 210 | static void vnc_client_read(void *opaque); |
| 211 | |
| 212 | static void vnc_colordepth(DisplayState *ds, int depth); |
| 213 | |
| 214 | static inline void vnc_set_bit(uint32_t *d, int k) |
| 215 | { |
| 216 | d[k >> 5] |= 1 << (k & 0x1f); |
| 217 | } |
| 218 | |
| 219 | static inline void vnc_clear_bit(uint32_t *d, int k) |
| 220 | { |
| 221 | d[k >> 5] &= ~(1 << (k & 0x1f)); |
| 222 | } |
| 223 | |
| 224 | static inline void vnc_set_bits(uint32_t *d, int n, int nb_words) |
| 225 | { |
| 226 | int j; |
| 227 | |
| 228 | j = 0; |
| 229 | while (n >= 32) { |
| 230 | d[j++] = -1; |
| 231 | n -= 32; |
| 232 | } |
| 233 | if (n > 0) |
| 234 | d[j++] = (1 << n) - 1; |
| 235 | while (j < nb_words) |
| 236 | d[j++] = 0; |
| 237 | } |
| 238 | |
| 239 | static inline int vnc_get_bit(const uint32_t *d, int k) |
| 240 | { |
| 241 | return (d[k >> 5] >> (k & 0x1f)) & 1; |
| 242 | } |
| 243 | |
| 244 | static inline int vnc_and_bits(const uint32_t *d1, const uint32_t *d2, |
| 245 | int nb_words) |
| 246 | { |
| 247 | int i; |
| 248 | for(i = 0; i < nb_words; i++) { |
| 249 | if ((d1[i] & d2[i]) != 0) |
| 250 | return 1; |
| 251 | } |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static void vnc_dpy_update(DisplayState *ds, int x, int y, int w, int h) |
| 256 | { |
| 257 | VncState *vs = ds->opaque; |
| 258 | int i; |
| 259 | |
| 260 | h += y; |
| 261 | |
| 262 | /* round x down to ensure the loop only spans one 16-pixel block per, |
| 263 | iteration. otherwise, if (x % 16) != 0, the last iteration may span |
| 264 | two 16-pixel blocks but we only mark the first as dirty |
| 265 | */ |
| 266 | w += (x % 16); |
| 267 | x -= (x % 16); |
| 268 | |
| 269 | x = MIN(x, vs->width); |
| 270 | y = MIN(y, vs->height); |
| 271 | w = MIN(x + w, vs->width) - x; |
| 272 | h = MIN(h, vs->height); |
| 273 | |
| 274 | for (; y < h; y++) |
| 275 | for (i = 0; i < w; i += 16) |
| 276 | vnc_set_bit(vs->dirty_row[y], (x + i) / 16); |
| 277 | } |
| 278 | |
| 279 | static void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, |
| 280 | int32_t encoding) |
| 281 | { |
| 282 | vnc_write_u16(vs, x); |
| 283 | vnc_write_u16(vs, y); |
| 284 | vnc_write_u16(vs, w); |
| 285 | vnc_write_u16(vs, h); |
| 286 | |
| 287 | vnc_write_s32(vs, encoding); |
| 288 | } |
| 289 | |
| 290 | static void vnc_dpy_resize(DisplayState *ds, int w, int h) |
| 291 | { |
| 292 | int size_changed; |
| 293 | VncState *vs = ds->opaque; |
| 294 | |
| 295 | ds->data = qemu_realloc(ds->data, w * h * vs->depth); |
| 296 | vs->old_data = qemu_realloc(vs->old_data, w * h * vs->depth); |
| 297 | |
| 298 | if (ds->data == NULL || vs->old_data == NULL) { |
| 299 | fprintf(stderr, "vnc: memory allocation failed\n"); |
| 300 | exit(1); |
| 301 | } |
| 302 | |
| 303 | if (ds->depth != vs->depth * 8) { |
| 304 | ds->depth = vs->depth * 8; |
| 305 | console_color_init(ds); |
| 306 | } |
| 307 | size_changed = ds->width != w || ds->height != h; |
| 308 | ds->width = w; |
| 309 | ds->height = h; |
| 310 | ds->linesize = w * vs->depth; |
| 311 | if (size_changed) { |
| 312 | vs->width = ds->width; |
| 313 | vs->height = ds->height; |
| 314 | if (vs->csock != -1 && vs->has_resize) { |
| 315 | vnc_write_u8(vs, 0); /* msg id */ |
| 316 | vnc_write_u8(vs, 0); |
| 317 | vnc_write_u16(vs, 1); /* number of rects */ |
| 318 | vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, -223); |
| 319 | vnc_flush(vs); |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
| 324 | memset(vs->old_data, 42, vs->ds->linesize * vs->ds->height); |
| 325 | } |
| 326 | |
| 327 | /* fastest code */ |
| 328 | static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size) |
| 329 | { |
| 330 | vnc_write(vs, pixels, size); |
| 331 | } |
| 332 | |
| 333 | /* slowest but generic code. */ |
| 334 | static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) |
| 335 | { |
| 336 | uint8_t r, g, b; |
| 337 | |
| 338 | r = ((v >> vs->server_red_shift) & vs->server_red_max) * (vs->client_red_max + 1) / |
| 339 | (vs->server_red_max + 1); |
| 340 | g = ((v >> vs->server_green_shift) & vs->server_green_max) * (vs->client_green_max + 1) / |
| 341 | (vs->server_green_max + 1); |
| 342 | b = ((v >> vs->server_blue_shift) & vs->server_blue_max) * (vs->client_blue_max + 1) / |
| 343 | (vs->server_blue_max + 1); |
| 344 | v = (r << vs->client_red_shift) | |
| 345 | (g << vs->client_green_shift) | |
| 346 | (b << vs->client_blue_shift); |
| 347 | switch(vs->pix_bpp) { |
| 348 | case 1: |
| 349 | buf[0] = v; |
| 350 | break; |
| 351 | case 2: |
| 352 | if (vs->pix_big_endian) { |
| 353 | buf[0] = v >> 8; |
| 354 | buf[1] = v; |
| 355 | } else { |
| 356 | buf[1] = v >> 8; |
| 357 | buf[0] = v; |
| 358 | } |
| 359 | break; |
| 360 | default: |
| 361 | case 4: |
| 362 | if (vs->pix_big_endian) { |
| 363 | buf[0] = v >> 24; |
| 364 | buf[1] = v >> 16; |
| 365 | buf[2] = v >> 8; |
| 366 | buf[3] = v; |
| 367 | } else { |
| 368 | buf[3] = v >> 24; |
| 369 | buf[2] = v >> 16; |
| 370 | buf[1] = v >> 8; |
| 371 | buf[0] = v; |
| 372 | } |
| 373 | break; |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size) |
| 378 | { |
| 379 | uint8_t buf[4]; |
| 380 | |
| 381 | if (vs->depth == 4) { |
| 382 | uint32_t *pixels = pixels1; |
| 383 | int n, i; |
| 384 | n = size >> 2; |
| 385 | for(i = 0; i < n; i++) { |
| 386 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 387 | vnc_write(vs, buf, vs->pix_bpp); |
| 388 | } |
| 389 | } else if (vs->depth == 2) { |
| 390 | uint16_t *pixels = pixels1; |
| 391 | int n, i; |
| 392 | n = size >> 1; |
| 393 | for(i = 0; i < n; i++) { |
| 394 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 395 | vnc_write(vs, buf, vs->pix_bpp); |
| 396 | } |
| 397 | } else if (vs->depth == 1) { |
| 398 | uint8_t *pixels = pixels1; |
| 399 | int n, i; |
| 400 | n = size; |
| 401 | for(i = 0; i < n; i++) { |
| 402 | vnc_convert_pixel(vs, buf, pixels[i]); |
| 403 | vnc_write(vs, buf, vs->pix_bpp); |
| 404 | } |
| 405 | } else { |
| 406 | fprintf(stderr, "vnc_write_pixels_generic: VncState color depth not supported\n"); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h) |
| 411 | { |
| 412 | int i; |
| 413 | uint8_t *row; |
| 414 | |
| 415 | vnc_framebuffer_update(vs, x, y, w, h, 0); |
| 416 | |
| 417 | row = vs->ds->data + y * vs->ds->linesize + x * vs->depth; |
| 418 | for (i = 0; i < h; i++) { |
| 419 | vs->write_pixels(vs, row, w * vs->depth); |
| 420 | row += vs->ds->linesize; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h) |
| 425 | { |
| 426 | ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F); |
| 427 | ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F); |
| 428 | } |
| 429 | |
| 430 | #define BPP 8 |
| 431 | #include "vnchextile.h" |
| 432 | #undef BPP |
| 433 | |
| 434 | #define BPP 16 |
| 435 | #include "vnchextile.h" |
| 436 | #undef BPP |
| 437 | |
| 438 | #define BPP 32 |
| 439 | #include "vnchextile.h" |
| 440 | #undef BPP |
| 441 | |
| 442 | #define GENERIC |
| 443 | #define BPP 8 |
| 444 | #include "vnchextile.h" |
| 445 | #undef BPP |
| 446 | #undef GENERIC |
| 447 | |
| 448 | #define GENERIC |
| 449 | #define BPP 16 |
| 450 | #include "vnchextile.h" |
| 451 | #undef BPP |
| 452 | #undef GENERIC |
| 453 | |
| 454 | #define GENERIC |
| 455 | #define BPP 32 |
| 456 | #include "vnchextile.h" |
| 457 | #undef BPP |
| 458 | #undef GENERIC |
| 459 | |
| 460 | static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) |
| 461 | { |
| 462 | int i, j; |
| 463 | int has_fg, has_bg; |
| 464 | uint8_t *last_fg, *last_bg; |
| 465 | |
| 466 | vnc_framebuffer_update(vs, x, y, w, h, 5); |
| 467 | |
| 468 | last_fg = (uint8_t *) malloc(vs->depth); |
| 469 | last_bg = (uint8_t *) malloc(vs->depth); |
| 470 | has_fg = has_bg = 0; |
| 471 | for (j = y; j < (y + h); j += 16) { |
| 472 | for (i = x; i < (x + w); i += 16) { |
| 473 | vs->send_hextile_tile(vs, i, j, |
| 474 | MIN(16, x + w - i), MIN(16, y + h - j), |
| 475 | last_bg, last_fg, &has_bg, &has_fg); |
| 476 | } |
| 477 | } |
| 478 | free(last_fg); |
| 479 | free(last_bg); |
| 480 | |
| 481 | } |
| 482 | |
| 483 | static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h) |
| 484 | { |
| 485 | if (vs->has_hextile) |
| 486 | send_framebuffer_update_hextile(vs, x, y, w, h); |
| 487 | else |
| 488 | send_framebuffer_update_raw(vs, x, y, w, h); |
| 489 | } |
| 490 | |
| 491 | static void vnc_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h) |
| 492 | { |
| 493 | int src, dst; |
| 494 | uint8_t *src_row; |
| 495 | uint8_t *dst_row; |
| 496 | char *old_row; |
| 497 | int y = 0; |
| 498 | int pitch = ds->linesize; |
| 499 | VncState *vs = ds->opaque; |
| 500 | |
| 501 | vnc_update_client(vs); |
| 502 | |
| 503 | if (dst_y > src_y) { |
| 504 | y = h - 1; |
| 505 | pitch = -pitch; |
| 506 | } |
| 507 | |
| 508 | src = (ds->linesize * (src_y + y) + vs->depth * src_x); |
| 509 | dst = (ds->linesize * (dst_y + y) + vs->depth * dst_x); |
| 510 | |
| 511 | src_row = ds->data + src; |
| 512 | dst_row = ds->data + dst; |
| 513 | old_row = vs->old_data + dst; |
| 514 | |
| 515 | for (y = 0; y < h; y++) { |
| 516 | memmove(old_row, src_row, w * vs->depth); |
| 517 | memmove(dst_row, src_row, w * vs->depth); |
| 518 | src_row += pitch; |
| 519 | dst_row += pitch; |
| 520 | old_row += pitch; |
| 521 | } |
| 522 | |
| 523 | vnc_write_u8(vs, 0); /* msg id */ |
| 524 | vnc_write_u8(vs, 0); |
| 525 | vnc_write_u16(vs, 1); /* number of rects */ |
| 526 | vnc_framebuffer_update(vs, dst_x, dst_y, w, h, 1); |
| 527 | vnc_write_u16(vs, src_x); |
| 528 | vnc_write_u16(vs, src_y); |
| 529 | vnc_flush(vs); |
| 530 | } |
| 531 | |
| 532 | static int find_dirty_height(VncState *vs, int y, int last_x, int x) |
| 533 | { |
| 534 | int h; |
| 535 | |
| 536 | for (h = 1; h < (vs->height - y); h++) { |
| 537 | int tmp_x; |
| 538 | if (!vnc_get_bit(vs->dirty_row[y + h], last_x)) |
| 539 | break; |
| 540 | for (tmp_x = last_x; tmp_x < x; tmp_x++) |
| 541 | vnc_clear_bit(vs->dirty_row[y + h], tmp_x); |
| 542 | } |
| 543 | |
| 544 | return h; |
| 545 | } |
| 546 | |
| 547 | static void vnc_update_client(void *opaque) |
| 548 | { |
| 549 | VncState *vs = opaque; |
| 550 | |
| 551 | if (vs->need_update && vs->csock != -1) { |
| 552 | int y; |
| 553 | uint8_t *row; |
| 554 | char *old_row; |
| 555 | uint32_t width_mask[VNC_DIRTY_WORDS]; |
| 556 | int n_rectangles; |
| 557 | int saved_offset; |
| 558 | int has_dirty = 0; |
| 559 | |
| 560 | vga_hw_update(); |
| 561 | |
| 562 | vnc_set_bits(width_mask, (vs->width / 16), VNC_DIRTY_WORDS); |
| 563 | |
| 564 | /* Walk through the dirty map and eliminate tiles that |
| 565 | really aren't dirty */ |
| 566 | row = vs->ds->data; |
| 567 | old_row = vs->old_data; |
| 568 | |
| 569 | for (y = 0; y < vs->height; y++) { |
| 570 | if (vnc_and_bits(vs->dirty_row[y], width_mask, VNC_DIRTY_WORDS)) { |
| 571 | int x; |
| 572 | uint8_t *ptr; |
| 573 | char *old_ptr; |
| 574 | |
| 575 | ptr = row; |
| 576 | old_ptr = (char*)old_row; |
| 577 | |
| 578 | for (x = 0; x < vs->ds->width; x += 16) { |
| 579 | if (memcmp(old_ptr, ptr, 16 * vs->depth) == 0) { |
| 580 | vnc_clear_bit(vs->dirty_row[y], (x / 16)); |
| 581 | } else { |
| 582 | has_dirty = 1; |
| 583 | memcpy(old_ptr, ptr, 16 * vs->depth); |
| 584 | } |
| 585 | |
| 586 | ptr += 16 * vs->depth; |
| 587 | old_ptr += 16 * vs->depth; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | row += vs->ds->linesize; |
| 592 | old_row += vs->ds->linesize; |
| 593 | } |
| 594 | |
| 595 | if (!has_dirty) { |
| 596 | qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
| 597 | return; |
| 598 | } |
| 599 | |
| 600 | /* Count rectangles */ |
| 601 | n_rectangles = 0; |
| 602 | vnc_write_u8(vs, 0); /* msg id */ |
| 603 | vnc_write_u8(vs, 0); |
| 604 | saved_offset = vs->output.offset; |
| 605 | vnc_write_u16(vs, 0); |
| 606 | |
| 607 | for (y = 0; y < vs->height; y++) { |
| 608 | int x; |
| 609 | int last_x = -1; |
| 610 | for (x = 0; x < vs->width / 16; x++) { |
| 611 | if (vnc_get_bit(vs->dirty_row[y], x)) { |
| 612 | if (last_x == -1) { |
| 613 | last_x = x; |
| 614 | } |
| 615 | vnc_clear_bit(vs->dirty_row[y], x); |
| 616 | } else { |
| 617 | if (last_x != -1) { |
| 618 | int h = find_dirty_height(vs, y, last_x, x); |
| 619 | send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 620 | n_rectangles++; |
| 621 | } |
| 622 | last_x = -1; |
| 623 | } |
| 624 | } |
| 625 | if (last_x != -1) { |
| 626 | int h = find_dirty_height(vs, y, last_x, x); |
| 627 | send_framebuffer_update(vs, last_x * 16, y, (x - last_x) * 16, h); |
| 628 | n_rectangles++; |
| 629 | } |
| 630 | } |
| 631 | vs->output.buffer[saved_offset] = (n_rectangles >> 8) & 0xFF; |
| 632 | vs->output.buffer[saved_offset + 1] = n_rectangles & 0xFF; |
| 633 | vnc_flush(vs); |
| 634 | |
| 635 | } |
| 636 | |
| 637 | if (vs->csock != -1) { |
| 638 | qemu_mod_timer(vs->timer, qemu_get_clock(rt_clock) + VNC_REFRESH_INTERVAL); |
| 639 | } |
| 640 | |
| 641 | } |
| 642 | |
| 643 | static int vnc_listen_poll(void *opaque) |
| 644 | { |
| 645 | VncState *vs = opaque; |
| 646 | if (vs->csock == -1) |
| 647 | return 1; |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | static void buffer_reserve(Buffer *buffer, size_t len) |
| 652 | { |
| 653 | if ((buffer->capacity - buffer->offset) < len) { |
| 654 | buffer->capacity += (len + 1024); |
| 655 | buffer->buffer = qemu_realloc(buffer->buffer, buffer->capacity); |
| 656 | if (buffer->buffer == NULL) { |
| 657 | fprintf(stderr, "vnc: out of memory\n"); |
| 658 | exit(1); |
| 659 | } |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | static int buffer_empty(Buffer *buffer) |
| 664 | { |
| 665 | return buffer->offset == 0; |
| 666 | } |
| 667 | |
| 668 | static uint8_t *buffer_end(Buffer *buffer) |
| 669 | { |
| 670 | return buffer->buffer + buffer->offset; |
| 671 | } |
| 672 | |
| 673 | static void buffer_reset(Buffer *buffer) |
| 674 | { |
| 675 | buffer->offset = 0; |
| 676 | } |
| 677 | |
| 678 | static void buffer_append(Buffer *buffer, const void *data, size_t len) |
| 679 | { |
| 680 | memcpy(buffer->buffer + buffer->offset, data, len); |
| 681 | buffer->offset += len; |
| 682 | } |
| 683 | |
| 684 | static int vnc_client_io_error(VncState *vs, int ret, int last_errno) |
| 685 | { |
| 686 | if (ret == 0 || ret == -1) { |
| 687 | if (ret == -1) { |
| 688 | switch (last_errno) { |
| 689 | case EINTR: |
| 690 | case EAGAIN: |
| 691 | #ifdef _WIN32 |
| 692 | case EWOULDBLOCK: |
| 693 | #endif |
| 694 | return 0; |
| 695 | default: |
| 696 | break; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | VNC_DEBUG("Closing down client sock %d %d\n", ret, ret < 0 ? last_errno : 0); |
| 701 | qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
| 702 | socket_close(vs->csock); |
| 703 | vs->csock = -1; |
| 704 | vs->ds->idle = 1; |
| 705 | buffer_reset(&vs->input); |
| 706 | buffer_reset(&vs->output); |
| 707 | vs->need_update = 0; |
| 708 | #ifdef CONFIG_VNC_TLS |
| 709 | if (vs->tls_session) { |
| 710 | gnutls_deinit(vs->tls_session); |
| 711 | vs->tls_session = NULL; |
| 712 | } |
| 713 | vs->wiremode = VNC_WIREMODE_CLEAR; |
| 714 | #endif /* CONFIG_VNC_TLS */ |
| 715 | return 0; |
| 716 | } |
| 717 | return ret; |
| 718 | } |
| 719 | |
| 720 | static void vnc_client_error(VncState *vs) |
| 721 | { |
| 722 | vnc_client_io_error(vs, -1, EINVAL); |
| 723 | } |
| 724 | |
| 725 | static void vnc_client_write(void *opaque) |
| 726 | { |
| 727 | long ret; |
| 728 | VncState *vs = opaque; |
| 729 | |
| 730 | #ifdef CONFIG_VNC_TLS |
| 731 | if (vs->tls_session) { |
| 732 | ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset); |
| 733 | if (ret < 0) { |
| 734 | if (ret == GNUTLS_E_AGAIN) |
| 735 | errno = EAGAIN; |
| 736 | else |
| 737 | errno = EIO; |
| 738 | ret = -1; |
| 739 | } |
| 740 | } else |
| 741 | #endif /* CONFIG_VNC_TLS */ |
| 742 | ret = socket_send(vs->csock, vs->output.buffer, vs->output.offset); |
| 743 | ret = vnc_client_io_error(vs, ret, errno_str); |
| 744 | if (!ret) |
| 745 | return; |
| 746 | |
| 747 | memmove(vs->output.buffer, vs->output.buffer + ret, (vs->output.offset - ret)); |
| 748 | vs->output.offset -= ret; |
| 749 | |
| 750 | if (vs->output.offset == 0) { |
| 751 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting) |
| 756 | { |
| 757 | vs->read_handler = func; |
| 758 | vs->read_handler_expect = expecting; |
| 759 | } |
| 760 | |
| 761 | static void vnc_client_read(void *opaque) |
| 762 | { |
| 763 | VncState *vs = opaque; |
| 764 | long ret; |
| 765 | |
| 766 | buffer_reserve(&vs->input, 4096); |
| 767 | |
| 768 | #ifdef CONFIG_VNC_TLS |
| 769 | if (vs->tls_session) { |
| 770 | ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096); |
| 771 | if (ret < 0) { |
| 772 | if (ret == GNUTLS_E_AGAIN) |
| 773 | errno = EAGAIN; |
| 774 | else |
| 775 | errno = EIO; |
| 776 | ret = -1; |
| 777 | } |
| 778 | } else |
| 779 | #endif /* CONFIG_VNC_TLS */ |
| 780 | ret = socket_recv(vs->csock, buffer_end(&vs->input), 4096); |
| 781 | ret = vnc_client_io_error(vs, ret, errno_str); |
| 782 | if (!ret) |
| 783 | return; |
| 784 | |
| 785 | vs->input.offset += ret; |
| 786 | |
| 787 | while (vs->read_handler && vs->input.offset >= vs->read_handler_expect) { |
| 788 | size_t len = vs->read_handler_expect; |
| 789 | int ret; |
| 790 | |
| 791 | ret = vs->read_handler(vs, vs->input.buffer, len); |
| 792 | if (vs->csock == -1) |
| 793 | return; |
| 794 | |
| 795 | if (!ret) { |
| 796 | memmove(vs->input.buffer, vs->input.buffer + len, (vs->input.offset - len)); |
| 797 | vs->input.offset -= len; |
| 798 | } else { |
| 799 | vs->read_handler_expect = ret; |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | static void vnc_write(VncState *vs, const void *data, size_t len) |
| 805 | { |
| 806 | buffer_reserve(&vs->output, len); |
| 807 | |
| 808 | if (buffer_empty(&vs->output)) { |
| 809 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs); |
| 810 | } |
| 811 | |
| 812 | buffer_append(&vs->output, data, len); |
| 813 | } |
| 814 | |
| 815 | static void vnc_write_s32(VncState *vs, int32_t value) |
| 816 | { |
| 817 | vnc_write_u32(vs, *(uint32_t *)&value); |
| 818 | } |
| 819 | |
| 820 | static void vnc_write_u32(VncState *vs, uint32_t value) |
| 821 | { |
| 822 | uint8_t buf[4]; |
| 823 | |
| 824 | buf[0] = (value >> 24) & 0xFF; |
| 825 | buf[1] = (value >> 16) & 0xFF; |
| 826 | buf[2] = (value >> 8) & 0xFF; |
| 827 | buf[3] = value & 0xFF; |
| 828 | |
| 829 | vnc_write(vs, buf, 4); |
| 830 | } |
| 831 | |
| 832 | static void vnc_write_u16(VncState *vs, uint16_t value) |
| 833 | { |
| 834 | uint8_t buf[2]; |
| 835 | |
| 836 | buf[0] = (value >> 8) & 0xFF; |
| 837 | buf[1] = value & 0xFF; |
| 838 | |
| 839 | vnc_write(vs, buf, 2); |
| 840 | } |
| 841 | |
| 842 | static void vnc_write_u8(VncState *vs, uint8_t value) |
| 843 | { |
| 844 | vnc_write(vs, (char *)&value, 1); |
| 845 | } |
| 846 | |
| 847 | static void vnc_flush(VncState *vs) |
| 848 | { |
| 849 | if (vs->output.offset) |
| 850 | vnc_client_write(vs); |
| 851 | } |
| 852 | |
| 853 | static uint8_t read_u8(uint8_t *data, size_t offset) |
| 854 | { |
| 855 | return data[offset]; |
| 856 | } |
| 857 | |
| 858 | static uint16_t read_u16(uint8_t *data, size_t offset) |
| 859 | { |
| 860 | return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF); |
| 861 | } |
| 862 | |
| 863 | static int32_t read_s32(uint8_t *data, size_t offset) |
| 864 | { |
| 865 | return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) | |
| 866 | (data[offset + 2] << 8) | data[offset + 3]); |
| 867 | } |
| 868 | |
| 869 | static uint32_t read_u32(uint8_t *data, size_t offset) |
| 870 | { |
| 871 | return ((data[offset] << 24) | (data[offset + 1] << 16) | |
| 872 | (data[offset + 2] << 8) | data[offset + 3]); |
| 873 | } |
| 874 | |
| 875 | #ifdef CONFIG_VNC_TLS |
| 876 | static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport, |
| 877 | const void *data, |
| 878 | size_t len) { |
| 879 | struct VncState *vs = (struct VncState *)transport; |
| 880 | |
| 881 | return socket_send(vs->csock, data, len); |
| 882 | } |
| 883 | |
| 884 | |
| 885 | static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport, |
| 886 | void *data, |
| 887 | size_t len) { |
| 888 | struct VncState *vs = (struct VncState *)transport; |
| 889 | |
| 890 | return socket_recv(vs->csock, data, len); |
| 891 | } |
| 892 | #endif /* CONFIG_VNC_TLS */ |
| 893 | |
| 894 | static void client_cut_text(VncState *vs, size_t len, uint8_t *text) |
| 895 | { |
| 896 | } |
| 897 | |
| 898 | static void check_pointer_type_change(VncState *vs, int absolute) |
| 899 | { |
| 900 | if (vs->has_pointer_type_change && vs->absolute != absolute) { |
| 901 | vnc_write_u8(vs, 0); |
| 902 | vnc_write_u8(vs, 0); |
| 903 | vnc_write_u16(vs, 1); |
| 904 | vnc_framebuffer_update(vs, absolute, 0, |
| 905 | vs->ds->width, vs->ds->height, -257); |
| 906 | vnc_flush(vs); |
| 907 | } |
| 908 | vs->absolute = absolute; |
| 909 | } |
| 910 | |
| 911 | static void pointer_event(VncState *vs, int button_mask, int x, int y) |
| 912 | { |
| 913 | int buttons = 0; |
| 914 | int dz = 0; |
| 915 | |
| 916 | if (button_mask & 0x01) |
| 917 | buttons |= MOUSE_EVENT_LBUTTON; |
| 918 | if (button_mask & 0x02) |
| 919 | buttons |= MOUSE_EVENT_MBUTTON; |
| 920 | if (button_mask & 0x04) |
| 921 | buttons |= MOUSE_EVENT_RBUTTON; |
| 922 | if (button_mask & 0x08) |
| 923 | dz = -1; |
| 924 | if (button_mask & 0x10) |
| 925 | dz = 1; |
| 926 | |
| 927 | if (vs->absolute) { |
| 928 | kbd_mouse_event(x * 0x7FFF / (vs->ds->width - 1), |
| 929 | y * 0x7FFF / (vs->ds->height - 1), |
| 930 | dz, buttons); |
| 931 | } else if (vs->has_pointer_type_change) { |
| 932 | x -= 0x7FFF; |
| 933 | y -= 0x7FFF; |
| 934 | |
| 935 | kbd_mouse_event(x, y, dz, buttons); |
| 936 | } else { |
| 937 | if (vs->last_x != -1) |
| 938 | kbd_mouse_event(x - vs->last_x, |
| 939 | y - vs->last_y, |
| 940 | dz, buttons); |
| 941 | vs->last_x = x; |
| 942 | vs->last_y = y; |
| 943 | } |
| 944 | |
| 945 | check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 946 | } |
| 947 | |
| 948 | static void reset_keys(VncState *vs) |
| 949 | { |
| 950 | int i; |
| 951 | for(i = 0; i < 256; i++) { |
| 952 | if (vs->modifiers_state[i]) { |
| 953 | if (i & 0x80) |
| 954 | kbd_put_keycode(0xe0); |
| 955 | kbd_put_keycode(i | 0x80); |
| 956 | vs->modifiers_state[i] = 0; |
| 957 | } |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | static void press_key(VncState *vs, int keysym) |
| 962 | { |
| 963 | kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) & 0x7f); |
| 964 | kbd_put_keycode(keysym2scancode(vs->kbd_layout, keysym) | 0x80); |
| 965 | } |
| 966 | |
| 967 | static void do_key_event(VncState *vs, int down, int keycode, int sym) |
| 968 | { |
| 969 | /* QEMU console switch */ |
| 970 | switch(keycode) { |
| 971 | case 0x2a: /* Left Shift */ |
| 972 | case 0x36: /* Right Shift */ |
| 973 | case 0x1d: /* Left CTRL */ |
| 974 | case 0x9d: /* Right CTRL */ |
| 975 | case 0x38: /* Left ALT */ |
| 976 | case 0xb8: /* Right ALT */ |
| 977 | if (down) |
| 978 | vs->modifiers_state[keycode] = 1; |
| 979 | else |
| 980 | vs->modifiers_state[keycode] = 0; |
| 981 | break; |
| 982 | case 0x02 ... 0x0a: /* '1' to '9' keys */ |
| 983 | if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38]) { |
| 984 | /* Reset the modifiers sent to the current console */ |
| 985 | reset_keys(vs); |
| 986 | console_select(keycode - 0x02); |
| 987 | return; |
| 988 | } |
| 989 | break; |
| 990 | case 0x3a: /* CapsLock */ |
| 991 | case 0x45: /* NumLock */ |
| 992 | if (!down) |
| 993 | vs->modifiers_state[keycode] ^= 1; |
| 994 | break; |
| 995 | } |
| 996 | |
| 997 | if (keycode_is_keypad(vs->kbd_layout, keycode)) { |
| 998 | /* If the numlock state needs to change then simulate an additional |
| 999 | keypress before sending this one. This will happen if the user |
| 1000 | toggles numlock away from the VNC window. |
| 1001 | */ |
| 1002 | if (keysym_is_numlock(vs->kbd_layout, sym & 0xFFFF)) { |
| 1003 | if (!vs->modifiers_state[0x45]) { |
| 1004 | vs->modifiers_state[0x45] = 1; |
| 1005 | press_key(vs, 0xff7f); |
| 1006 | } |
| 1007 | } else { |
| 1008 | if (vs->modifiers_state[0x45]) { |
| 1009 | vs->modifiers_state[0x45] = 0; |
| 1010 | press_key(vs, 0xff7f); |
| 1011 | } |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | if (is_graphic_console()) { |
| 1016 | if (keycode & 0x80) |
| 1017 | kbd_put_keycode(0xe0); |
| 1018 | if (down) |
| 1019 | kbd_put_keycode(keycode & 0x7f); |
| 1020 | else |
| 1021 | kbd_put_keycode(keycode | 0x80); |
| 1022 | } else { |
| 1023 | /* QEMU console emulation */ |
| 1024 | if (down) { |
| 1025 | switch (keycode) { |
| 1026 | case 0x2a: /* Left Shift */ |
| 1027 | case 0x36: /* Right Shift */ |
| 1028 | case 0x1d: /* Left CTRL */ |
| 1029 | case 0x9d: /* Right CTRL */ |
| 1030 | case 0x38: /* Left ALT */ |
| 1031 | case 0xb8: /* Right ALT */ |
| 1032 | break; |
| 1033 | case 0xc8: |
| 1034 | kbd_put_keysym(QEMU_KEY_UP); |
| 1035 | break; |
| 1036 | case 0xd0: |
| 1037 | kbd_put_keysym(QEMU_KEY_DOWN); |
| 1038 | break; |
| 1039 | case 0xcb: |
| 1040 | kbd_put_keysym(QEMU_KEY_LEFT); |
| 1041 | break; |
| 1042 | case 0xcd: |
| 1043 | kbd_put_keysym(QEMU_KEY_RIGHT); |
| 1044 | break; |
| 1045 | case 0xd3: |
| 1046 | kbd_put_keysym(QEMU_KEY_DELETE); |
| 1047 | break; |
| 1048 | case 0xc7: |
| 1049 | kbd_put_keysym(QEMU_KEY_HOME); |
| 1050 | break; |
| 1051 | case 0xcf: |
| 1052 | kbd_put_keysym(QEMU_KEY_END); |
| 1053 | break; |
| 1054 | case 0xc9: |
| 1055 | kbd_put_keysym(QEMU_KEY_PAGEUP); |
| 1056 | break; |
| 1057 | case 0xd1: |
| 1058 | kbd_put_keysym(QEMU_KEY_PAGEDOWN); |
| 1059 | break; |
| 1060 | default: |
| 1061 | kbd_put_keysym(sym); |
| 1062 | break; |
| 1063 | } |
| 1064 | } |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | static void key_event(VncState *vs, int down, uint32_t sym) |
| 1069 | { |
| 1070 | int keycode; |
| 1071 | |
| 1072 | if (sym >= 'A' && sym <= 'Z' && is_graphic_console()) |
| 1073 | sym = sym - 'A' + 'a'; |
| 1074 | |
| 1075 | keycode = keysym2scancode(vs->kbd_layout, sym & 0xFFFF); |
| 1076 | do_key_event(vs, down, keycode, sym); |
| 1077 | } |
| 1078 | |
| 1079 | static void ext_key_event(VncState *vs, int down, |
| 1080 | uint32_t sym, uint16_t keycode) |
| 1081 | { |
| 1082 | /* if the user specifies a keyboard layout, always use it */ |
| 1083 | if (keyboard_layout) |
| 1084 | key_event(vs, down, sym); |
| 1085 | else |
| 1086 | do_key_event(vs, down, keycode, sym); |
| 1087 | } |
| 1088 | |
| 1089 | static void framebuffer_update_request(VncState *vs, int incremental, |
| 1090 | int x_position, int y_position, |
| 1091 | int w, int h) |
| 1092 | { |
| 1093 | if (x_position > vs->ds->width) |
| 1094 | x_position = vs->ds->width; |
| 1095 | if (y_position > vs->ds->height) |
| 1096 | y_position = vs->ds->height; |
| 1097 | if (x_position + w >= vs->ds->width) |
| 1098 | w = vs->ds->width - x_position; |
| 1099 | if (y_position + h >= vs->ds->height) |
| 1100 | h = vs->ds->height - y_position; |
| 1101 | |
| 1102 | int i; |
| 1103 | vs->need_update = 1; |
| 1104 | if (!incremental) { |
| 1105 | char *old_row = vs->old_data + y_position * vs->ds->linesize; |
| 1106 | |
| 1107 | for (i = 0; i < h; i++) { |
| 1108 | vnc_set_bits(vs->dirty_row[y_position + i], |
| 1109 | (vs->ds->width / 16), VNC_DIRTY_WORDS); |
| 1110 | memset(old_row, 42, vs->ds->width * vs->depth); |
| 1111 | old_row += vs->ds->linesize; |
| 1112 | } |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | static void send_ext_key_event_ack(VncState *vs) |
| 1117 | { |
| 1118 | vnc_write_u8(vs, 0); |
| 1119 | vnc_write_u8(vs, 0); |
| 1120 | vnc_write_u16(vs, 1); |
| 1121 | vnc_framebuffer_update(vs, 0, 0, vs->ds->width, vs->ds->height, -258); |
| 1122 | vnc_flush(vs); |
| 1123 | } |
| 1124 | |
| 1125 | static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) |
| 1126 | { |
| 1127 | int i; |
| 1128 | |
| 1129 | vs->has_hextile = 0; |
| 1130 | vs->has_resize = 0; |
| 1131 | vs->has_pointer_type_change = 0; |
| 1132 | vs->has_WMVi = 0; |
| 1133 | vs->absolute = -1; |
| 1134 | vs->ds->dpy_copy = NULL; |
| 1135 | |
| 1136 | for (i = n_encodings - 1; i >= 0; i--) { |
| 1137 | switch (encodings[i]) { |
| 1138 | case 0: /* Raw */ |
| 1139 | vs->has_hextile = 0; |
| 1140 | break; |
| 1141 | case 1: /* CopyRect */ |
| 1142 | vs->ds->dpy_copy = vnc_copy; |
| 1143 | break; |
| 1144 | case 5: /* Hextile */ |
| 1145 | vs->has_hextile = 1; |
| 1146 | break; |
| 1147 | case -223: /* DesktopResize */ |
| 1148 | vs->has_resize = 1; |
| 1149 | break; |
| 1150 | case -257: |
| 1151 | vs->has_pointer_type_change = 1; |
| 1152 | break; |
| 1153 | case -258: |
| 1154 | send_ext_key_event_ack(vs); |
| 1155 | break; |
| 1156 | case 0x574D5669: |
| 1157 | vs->has_WMVi = 1; |
| 1158 | break; |
| 1159 | default: |
| 1160 | break; |
| 1161 | } |
| 1162 | } |
| 1163 | |
| 1164 | check_pointer_type_change(vs, kbd_mouse_is_absolute()); |
| 1165 | } |
| 1166 | |
| 1167 | static void set_pixel_format(VncState *vs, |
| 1168 | int bits_per_pixel, int depth, |
| 1169 | int big_endian_flag, int true_color_flag, |
| 1170 | int red_max, int green_max, int blue_max, |
| 1171 | int red_shift, int green_shift, int blue_shift) |
| 1172 | { |
| 1173 | int host_big_endian_flag; |
| 1174 | |
| 1175 | #ifdef WORDS_BIGENDIAN |
| 1176 | host_big_endian_flag = 1; |
| 1177 | #else |
| 1178 | host_big_endian_flag = 0; |
| 1179 | #endif |
| 1180 | if (!true_color_flag) { |
| 1181 | fail: |
| 1182 | vnc_client_error(vs); |
| 1183 | return; |
| 1184 | } |
| 1185 | if (bits_per_pixel == 32 && |
| 1186 | bits_per_pixel == vs->depth * 8 && |
| 1187 | host_big_endian_flag == big_endian_flag && |
| 1188 | red_max == 0xff && green_max == 0xff && blue_max == 0xff && |
| 1189 | red_shift == 16 && green_shift == 8 && blue_shift == 0) { |
| 1190 | vs->depth = 4; |
| 1191 | vs->write_pixels = vnc_write_pixels_copy; |
| 1192 | vs->send_hextile_tile = send_hextile_tile_32; |
| 1193 | } else |
| 1194 | if (bits_per_pixel == 16 && |
| 1195 | bits_per_pixel == vs->depth * 8 && |
| 1196 | host_big_endian_flag == big_endian_flag && |
| 1197 | red_max == 31 && green_max == 63 && blue_max == 31 && |
| 1198 | red_shift == 11 && green_shift == 5 && blue_shift == 0) { |
| 1199 | vs->depth = 2; |
| 1200 | vs->write_pixels = vnc_write_pixels_copy; |
| 1201 | vs->send_hextile_tile = send_hextile_tile_16; |
| 1202 | } else |
| 1203 | if (bits_per_pixel == 8 && |
| 1204 | bits_per_pixel == vs->depth * 8 && |
| 1205 | red_max == 7 && green_max == 7 && blue_max == 3 && |
| 1206 | red_shift == 5 && green_shift == 2 && blue_shift == 0) { |
| 1207 | vs->depth = 1; |
| 1208 | vs->write_pixels = vnc_write_pixels_copy; |
| 1209 | vs->send_hextile_tile = send_hextile_tile_8; |
| 1210 | } else |
| 1211 | { |
| 1212 | /* generic and slower case */ |
| 1213 | if (bits_per_pixel != 8 && |
| 1214 | bits_per_pixel != 16 && |
| 1215 | bits_per_pixel != 32) |
| 1216 | goto fail; |
| 1217 | if (vs->depth == 4) { |
| 1218 | vs->send_hextile_tile = send_hextile_tile_generic_32; |
| 1219 | } else if (vs->depth == 2) { |
| 1220 | vs->send_hextile_tile = send_hextile_tile_generic_16; |
| 1221 | } else { |
| 1222 | vs->send_hextile_tile = send_hextile_tile_generic_8; |
| 1223 | } |
| 1224 | |
| 1225 | vs->pix_big_endian = big_endian_flag; |
| 1226 | vs->write_pixels = vnc_write_pixels_generic; |
| 1227 | } |
| 1228 | |
| 1229 | vs->client_red_shift = red_shift; |
| 1230 | vs->client_red_max = red_max; |
| 1231 | vs->client_green_shift = green_shift; |
| 1232 | vs->client_green_max = green_max; |
| 1233 | vs->client_blue_shift = blue_shift; |
| 1234 | vs->client_blue_max = blue_max; |
| 1235 | vs->pix_bpp = bits_per_pixel / 8; |
| 1236 | |
| 1237 | vga_hw_invalidate(); |
| 1238 | vga_hw_update(); |
| 1239 | } |
| 1240 | |
| 1241 | static void pixel_format_message (VncState *vs) { |
| 1242 | char pad[3] = { 0, 0, 0 }; |
| 1243 | |
| 1244 | vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */ |
| 1245 | if (vs->depth == 4) vnc_write_u8(vs, 24); /* depth */ |
| 1246 | else vnc_write_u8(vs, vs->depth * 8); /* depth */ |
| 1247 | |
| 1248 | #ifdef WORDS_BIGENDIAN |
| 1249 | vnc_write_u8(vs, 1); /* big-endian-flag */ |
| 1250 | #else |
| 1251 | vnc_write_u8(vs, 0); /* big-endian-flag */ |
| 1252 | #endif |
| 1253 | vnc_write_u8(vs, 1); /* true-color-flag */ |
| 1254 | if (vs->depth == 4) { |
| 1255 | vnc_write_u16(vs, 0xFF); /* red-max */ |
| 1256 | vnc_write_u16(vs, 0xFF); /* green-max */ |
| 1257 | vnc_write_u16(vs, 0xFF); /* blue-max */ |
| 1258 | vnc_write_u8(vs, 16); /* red-shift */ |
| 1259 | vnc_write_u8(vs, 8); /* green-shift */ |
| 1260 | vnc_write_u8(vs, 0); /* blue-shift */ |
| 1261 | vs->send_hextile_tile = send_hextile_tile_32; |
| 1262 | } else if (vs->depth == 2) { |
| 1263 | vnc_write_u16(vs, 31); /* red-max */ |
| 1264 | vnc_write_u16(vs, 63); /* green-max */ |
| 1265 | vnc_write_u16(vs, 31); /* blue-max */ |
| 1266 | vnc_write_u8(vs, 11); /* red-shift */ |
| 1267 | vnc_write_u8(vs, 5); /* green-shift */ |
| 1268 | vnc_write_u8(vs, 0); /* blue-shift */ |
| 1269 | vs->send_hextile_tile = send_hextile_tile_16; |
| 1270 | } else if (vs->depth == 1) { |
| 1271 | /* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */ |
| 1272 | vnc_write_u16(vs, 7); /* red-max */ |
| 1273 | vnc_write_u16(vs, 7); /* green-max */ |
| 1274 | vnc_write_u16(vs, 3); /* blue-max */ |
| 1275 | vnc_write_u8(vs, 5); /* red-shift */ |
| 1276 | vnc_write_u8(vs, 2); /* green-shift */ |
| 1277 | vnc_write_u8(vs, 0); /* blue-shift */ |
| 1278 | vs->send_hextile_tile = send_hextile_tile_8; |
| 1279 | } |
| 1280 | vs->client_red_max = vs->server_red_max; |
| 1281 | vs->client_green_max = vs->server_green_max; |
| 1282 | vs->client_blue_max = vs->server_blue_max; |
| 1283 | vs->client_red_shift = vs->server_red_shift; |
| 1284 | vs->client_green_shift = vs->server_green_shift; |
| 1285 | vs->client_blue_shift = vs->server_blue_shift; |
| 1286 | vs->pix_bpp = vs->depth * 8; |
| 1287 | vs->write_pixels = vnc_write_pixels_copy; |
| 1288 | |
| 1289 | vnc_write(vs, pad, 3); /* padding */ |
| 1290 | } |
| 1291 | |
| 1292 | static void vnc_colordepth(DisplayState *ds, int depth) |
| 1293 | { |
| 1294 | int host_big_endian_flag; |
| 1295 | struct VncState *vs = ds->opaque; |
| 1296 | |
| 1297 | switch (depth) { |
| 1298 | case 24: |
| 1299 | if (ds->depth == 32) return; |
| 1300 | depth = 32; |
| 1301 | break; |
| 1302 | case 15: |
| 1303 | case 8: |
| 1304 | case 0: |
| 1305 | return; |
| 1306 | default: |
| 1307 | break; |
| 1308 | } |
| 1309 | |
| 1310 | #ifdef WORDS_BIGENDIAN |
| 1311 | host_big_endian_flag = 1; |
| 1312 | #else |
| 1313 | host_big_endian_flag = 0; |
| 1314 | #endif |
| 1315 | |
| 1316 | switch (depth) { |
| 1317 | case 8: |
| 1318 | vs->depth = depth / 8; |
| 1319 | vs->server_red_max = 7; |
| 1320 | vs->server_green_max = 7; |
| 1321 | vs->server_blue_max = 3; |
| 1322 | vs->server_red_shift = 5; |
| 1323 | vs->server_green_shift = 2; |
| 1324 | vs->server_blue_shift = 0; |
| 1325 | break; |
| 1326 | case 16: |
| 1327 | vs->depth = depth / 8; |
| 1328 | vs->server_red_max = 31; |
| 1329 | vs->server_green_max = 63; |
| 1330 | vs->server_blue_max = 31; |
| 1331 | vs->server_red_shift = 11; |
| 1332 | vs->server_green_shift = 5; |
| 1333 | vs->server_blue_shift = 0; |
| 1334 | break; |
| 1335 | case 32: |
| 1336 | vs->depth = 4; |
| 1337 | vs->server_red_max = 255; |
| 1338 | vs->server_green_max = 255; |
| 1339 | vs->server_blue_max = 255; |
| 1340 | vs->server_red_shift = 16; |
| 1341 | vs->server_green_shift = 8; |
| 1342 | vs->server_blue_shift = 0; |
| 1343 | break; |
| 1344 | default: |
| 1345 | return; |
| 1346 | } |
| 1347 | |
| 1348 | if (vs->csock != -1 && vs->has_WMVi) { |
| 1349 | /* Sending a WMVi message to notify the client*/ |
| 1350 | vnc_write_u8(vs, 0); /* msg id */ |
| 1351 | vnc_write_u8(vs, 0); |
| 1352 | vnc_write_u16(vs, 1); /* number of rects */ |
| 1353 | vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, 0x574D5669); |
| 1354 | pixel_format_message(vs); |
| 1355 | vnc_flush(vs); |
| 1356 | } else { |
| 1357 | if (vs->pix_bpp == 4 && vs->depth == 4 && |
| 1358 | host_big_endian_flag == vs->pix_big_endian && |
| 1359 | vs->client_red_max == 0xff && vs->client_green_max == 0xff && vs->client_blue_max == 0xff && |
| 1360 | vs->client_red_shift == 16 && vs->client_green_shift == 8 && vs->client_blue_shift == 0) { |
| 1361 | vs->write_pixels = vnc_write_pixels_copy; |
| 1362 | vs->send_hextile_tile = send_hextile_tile_32; |
| 1363 | } else if (vs->pix_bpp == 2 && vs->depth == 2 && |
| 1364 | host_big_endian_flag == vs->pix_big_endian && |
| 1365 | vs->client_red_max == 31 && vs->client_green_max == 63 && vs->client_blue_max == 31 && |
| 1366 | vs->client_red_shift == 11 && vs->client_green_shift == 5 && vs->client_blue_shift == 0) { |
| 1367 | vs->write_pixels = vnc_write_pixels_copy; |
| 1368 | vs->send_hextile_tile = send_hextile_tile_16; |
| 1369 | } else if (vs->pix_bpp == 1 && vs->depth == 1 && |
| 1370 | host_big_endian_flag == vs->pix_big_endian && |
| 1371 | vs->client_red_max == 7 && vs->client_green_max == 7 && vs->client_blue_max == 3 && |
| 1372 | vs->client_red_shift == 5 && vs->client_green_shift == 2 && vs->client_blue_shift == 0) { |
| 1373 | vs->write_pixels = vnc_write_pixels_copy; |
| 1374 | vs->send_hextile_tile = send_hextile_tile_8; |
| 1375 | } else { |
| 1376 | if (vs->depth == 4) { |
| 1377 | vs->send_hextile_tile = send_hextile_tile_generic_32; |
| 1378 | } else if (vs->depth == 2) { |
| 1379 | vs->send_hextile_tile = send_hextile_tile_generic_16; |
| 1380 | } else { |
| 1381 | vs->send_hextile_tile = send_hextile_tile_generic_8; |
| 1382 | } |
| 1383 | vs->write_pixels = vnc_write_pixels_generic; |
| 1384 | } |
| 1385 | } |
| 1386 | } |
| 1387 | |
| 1388 | static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len) |
| 1389 | { |
| 1390 | int i; |
| 1391 | uint16_t limit; |
| 1392 | |
| 1393 | switch (data[0]) { |
| 1394 | case 0: |
| 1395 | if (len == 1) |
| 1396 | return 20; |
| 1397 | |
| 1398 | set_pixel_format(vs, read_u8(data, 4), read_u8(data, 5), |
| 1399 | read_u8(data, 6), read_u8(data, 7), |
| 1400 | read_u16(data, 8), read_u16(data, 10), |
| 1401 | read_u16(data, 12), read_u8(data, 14), |
| 1402 | read_u8(data, 15), read_u8(data, 16)); |
| 1403 | break; |
| 1404 | case 2: |
| 1405 | if (len == 1) |
| 1406 | return 4; |
| 1407 | |
| 1408 | if (len == 4) |
| 1409 | return 4 + (read_u16(data, 2) * 4); |
| 1410 | |
| 1411 | limit = read_u16(data, 2); |
| 1412 | for (i = 0; i < limit; i++) { |
| 1413 | int32_t val = read_s32(data, 4 + (i * 4)); |
| 1414 | memcpy(data + 4 + (i * 4), &val, sizeof(val)); |
| 1415 | } |
| 1416 | |
| 1417 | set_encodings(vs, (int32_t *)(data + 4), limit); |
| 1418 | break; |
| 1419 | case 3: |
| 1420 | if (len == 1) |
| 1421 | return 10; |
| 1422 | |
| 1423 | framebuffer_update_request(vs, |
| 1424 | read_u8(data, 1), read_u16(data, 2), read_u16(data, 4), |
| 1425 | read_u16(data, 6), read_u16(data, 8)); |
| 1426 | break; |
| 1427 | case 4: |
| 1428 | if (len == 1) |
| 1429 | return 8; |
| 1430 | |
| 1431 | key_event(vs, read_u8(data, 1), read_u32(data, 4)); |
| 1432 | break; |
| 1433 | case 5: |
| 1434 | if (len == 1) |
| 1435 | return 6; |
| 1436 | |
| 1437 | pointer_event(vs, read_u8(data, 1), read_u16(data, 2), read_u16(data, 4)); |
| 1438 | break; |
| 1439 | case 6: |
| 1440 | if (len == 1) |
| 1441 | return 8; |
| 1442 | |
| 1443 | if (len == 8) { |
| 1444 | uint32_t dlen = read_u32(data, 4); |
| 1445 | if (dlen > 0) |
| 1446 | return 8 + dlen; |
| 1447 | } |
| 1448 | |
| 1449 | client_cut_text(vs, read_u32(data, 4), data + 8); |
| 1450 | break; |
| 1451 | case 255: |
| 1452 | if (len == 1) |
| 1453 | return 2; |
| 1454 | |
| 1455 | switch (read_u8(data, 1)) { |
| 1456 | case 0: |
| 1457 | if (len == 2) |
| 1458 | return 12; |
| 1459 | |
| 1460 | ext_key_event(vs, read_u16(data, 2), |
| 1461 | read_u32(data, 4), read_u32(data, 8)); |
| 1462 | break; |
| 1463 | default: |
| 1464 | printf("Msg: %d\n", read_u16(data, 0)); |
| 1465 | vnc_client_error(vs); |
| 1466 | break; |
| 1467 | } |
| 1468 | break; |
| 1469 | default: |
| 1470 | printf("Msg: %d\n", data[0]); |
| 1471 | vnc_client_error(vs); |
| 1472 | break; |
| 1473 | } |
| 1474 | |
| 1475 | vnc_read_when(vs, protocol_client_msg, 1); |
| 1476 | return 0; |
| 1477 | } |
| 1478 | |
| 1479 | static int protocol_client_init(VncState *vs, uint8_t *data, size_t len) |
| 1480 | { |
| 1481 | char buf[1024]; |
| 1482 | int size; |
| 1483 | |
| 1484 | vs->width = vs->ds->width; |
| 1485 | vs->height = vs->ds->height; |
| 1486 | vnc_write_u16(vs, vs->ds->width); |
| 1487 | vnc_write_u16(vs, vs->ds->height); |
| 1488 | |
| 1489 | pixel_format_message(vs); |
| 1490 | |
| 1491 | if (qemu_name) |
| 1492 | size = snprintf(buf, sizeof(buf), "QEMU (%s)", qemu_name); |
| 1493 | else |
| 1494 | size = snprintf(buf, sizeof(buf), "QEMU"); |
| 1495 | |
| 1496 | vnc_write_u32(vs, size); |
| 1497 | vnc_write(vs, buf, size); |
| 1498 | vnc_flush(vs); |
| 1499 | |
| 1500 | vnc_read_when(vs, protocol_client_msg, 1); |
| 1501 | |
| 1502 | return 0; |
| 1503 | } |
| 1504 | |
| 1505 | static void make_challenge(VncState *vs) |
| 1506 | { |
| 1507 | int i; |
| 1508 | |
| 1509 | srand(time(NULL)+getpid()+getpid()*987654+rand()); |
| 1510 | |
| 1511 | for (i = 0 ; i < sizeof(vs->challenge) ; i++) |
| 1512 | vs->challenge[i] = (int) (256.0*rand()/(RAND_MAX+1.0)); |
| 1513 | } |
| 1514 | |
| 1515 | static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len) |
| 1516 | { |
| 1517 | unsigned char response[VNC_AUTH_CHALLENGE_SIZE]; |
| 1518 | int i, j, pwlen; |
| 1519 | unsigned char key[8]; |
| 1520 | |
| 1521 | if (!vs->password || !vs->password[0]) { |
| 1522 | VNC_DEBUG("No password configured on server"); |
| 1523 | vnc_write_u32(vs, 1); /* Reject auth */ |
| 1524 | if (vs->minor >= 8) { |
| 1525 | static const char err[] = "Authentication failed"; |
| 1526 | vnc_write_u32(vs, sizeof(err)); |
| 1527 | vnc_write(vs, err, sizeof(err)); |
| 1528 | } |
| 1529 | vnc_flush(vs); |
| 1530 | vnc_client_error(vs); |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
| 1534 | memcpy(response, vs->challenge, VNC_AUTH_CHALLENGE_SIZE); |
| 1535 | |
| 1536 | /* Calculate the expected challenge response */ |
| 1537 | pwlen = strlen(vs->password); |
| 1538 | for (i=0; i<sizeof(key); i++) |
| 1539 | key[i] = i<pwlen ? vs->password[i] : 0; |
| 1540 | deskey(key, EN0); |
| 1541 | for (j = 0; j < VNC_AUTH_CHALLENGE_SIZE; j += 8) |
| 1542 | des(response+j, response+j); |
| 1543 | |
| 1544 | /* Compare expected vs actual challenge response */ |
| 1545 | if (memcmp(response, data, VNC_AUTH_CHALLENGE_SIZE) != 0) { |
| 1546 | VNC_DEBUG("Client challenge reponse did not match\n"); |
| 1547 | vnc_write_u32(vs, 1); /* Reject auth */ |
| 1548 | if (vs->minor >= 8) { |
| 1549 | static const char err[] = "Authentication failed"; |
| 1550 | vnc_write_u32(vs, sizeof(err)); |
| 1551 | vnc_write(vs, err, sizeof(err)); |
| 1552 | } |
| 1553 | vnc_flush(vs); |
| 1554 | vnc_client_error(vs); |
| 1555 | } else { |
| 1556 | VNC_DEBUG("Accepting VNC challenge response\n"); |
| 1557 | vnc_write_u32(vs, 0); /* Accept auth */ |
| 1558 | vnc_flush(vs); |
| 1559 | |
| 1560 | vnc_read_when(vs, protocol_client_init, 1); |
| 1561 | } |
| 1562 | return 0; |
| 1563 | } |
| 1564 | |
| 1565 | static int start_auth_vnc(VncState *vs) |
| 1566 | { |
| 1567 | make_challenge(vs); |
| 1568 | /* Send client a 'random' challenge */ |
| 1569 | vnc_write(vs, vs->challenge, sizeof(vs->challenge)); |
| 1570 | vnc_flush(vs); |
| 1571 | |
| 1572 | vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge)); |
| 1573 | return 0; |
| 1574 | } |
| 1575 | |
| 1576 | |
| 1577 | #ifdef CONFIG_VNC_TLS |
| 1578 | #define DH_BITS 1024 |
| 1579 | static gnutls_dh_params_t dh_params; |
| 1580 | |
| 1581 | static int vnc_tls_initialize(void) |
| 1582 | { |
| 1583 | static int tlsinitialized = 0; |
| 1584 | |
| 1585 | if (tlsinitialized) |
| 1586 | return 1; |
| 1587 | |
| 1588 | if (gnutls_global_init () < 0) |
| 1589 | return 0; |
| 1590 | |
| 1591 | /* XXX ought to re-generate diffie-hellmen params periodically */ |
| 1592 | if (gnutls_dh_params_init (&dh_params) < 0) |
| 1593 | return 0; |
| 1594 | if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0) |
| 1595 | return 0; |
| 1596 | |
| 1597 | #if _VNC_DEBUG == 2 |
| 1598 | gnutls_global_set_log_level(10); |
| 1599 | gnutls_global_set_log_function(vnc_debug_gnutls_log); |
| 1600 | #endif |
| 1601 | |
| 1602 | tlsinitialized = 1; |
| 1603 | |
| 1604 | return 1; |
| 1605 | } |
| 1606 | |
| 1607 | static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void) |
| 1608 | { |
| 1609 | gnutls_anon_server_credentials anon_cred; |
| 1610 | int ret; |
| 1611 | |
| 1612 | if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) { |
| 1613 | VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret)); |
| 1614 | return NULL; |
| 1615 | } |
| 1616 | |
| 1617 | gnutls_anon_set_server_dh_params(anon_cred, dh_params); |
| 1618 | |
| 1619 | return anon_cred; |
| 1620 | } |
| 1621 | |
| 1622 | |
| 1623 | static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs) |
| 1624 | { |
| 1625 | gnutls_certificate_credentials_t x509_cred; |
| 1626 | int ret; |
| 1627 | |
| 1628 | if (!vs->x509cacert) { |
| 1629 | VNC_DEBUG("No CA x509 certificate specified\n"); |
| 1630 | return NULL; |
| 1631 | } |
| 1632 | if (!vs->x509cert) { |
| 1633 | VNC_DEBUG("No server x509 certificate specified\n"); |
| 1634 | return NULL; |
| 1635 | } |
| 1636 | if (!vs->x509key) { |
| 1637 | VNC_DEBUG("No server private key specified\n"); |
| 1638 | return NULL; |
| 1639 | } |
| 1640 | |
| 1641 | if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) { |
| 1642 | VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret)); |
| 1643 | return NULL; |
| 1644 | } |
| 1645 | if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred, |
| 1646 | vs->x509cacert, |
| 1647 | GNUTLS_X509_FMT_PEM)) < 0) { |
| 1648 | VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret)); |
| 1649 | gnutls_certificate_free_credentials(x509_cred); |
| 1650 | return NULL; |
| 1651 | } |
| 1652 | |
| 1653 | if ((ret = gnutls_certificate_set_x509_key_file (x509_cred, |
| 1654 | vs->x509cert, |
| 1655 | vs->x509key, |
| 1656 | GNUTLS_X509_FMT_PEM)) < 0) { |
| 1657 | VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret)); |
| 1658 | gnutls_certificate_free_credentials(x509_cred); |
| 1659 | return NULL; |
| 1660 | } |
| 1661 | |
| 1662 | if (vs->x509cacrl) { |
| 1663 | if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred, |
| 1664 | vs->x509cacrl, |
| 1665 | GNUTLS_X509_FMT_PEM)) < 0) { |
| 1666 | VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret)); |
| 1667 | gnutls_certificate_free_credentials(x509_cred); |
| 1668 | return NULL; |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | gnutls_certificate_set_dh_params (x509_cred, dh_params); |
| 1673 | |
| 1674 | return x509_cred; |
| 1675 | } |
| 1676 | |
| 1677 | static int vnc_validate_certificate(struct VncState *vs) |
| 1678 | { |
| 1679 | int ret; |
| 1680 | unsigned int status; |
| 1681 | const gnutls_datum_t *certs; |
| 1682 | unsigned int nCerts, i; |
| 1683 | time_t now; |
| 1684 | |
| 1685 | VNC_DEBUG("Validating client certificate\n"); |
| 1686 | if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) { |
| 1687 | VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret)); |
| 1688 | return -1; |
| 1689 | } |
| 1690 | |
| 1691 | if ((now = time(NULL)) == ((time_t)-1)) { |
| 1692 | return -1; |
| 1693 | } |
| 1694 | |
| 1695 | if (status != 0) { |
| 1696 | if (status & GNUTLS_CERT_INVALID) |
| 1697 | VNC_DEBUG("The certificate is not trusted.\n"); |
| 1698 | |
| 1699 | if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) |
| 1700 | VNC_DEBUG("The certificate hasn't got a known issuer.\n"); |
| 1701 | |
| 1702 | if (status & GNUTLS_CERT_REVOKED) |
| 1703 | VNC_DEBUG("The certificate has been revoked.\n"); |
| 1704 | |
| 1705 | if (status & GNUTLS_CERT_INSECURE_ALGORITHM) |
| 1706 | VNC_DEBUG("The certificate uses an insecure algorithm\n"); |
| 1707 | |
| 1708 | return -1; |
| 1709 | } else { |
| 1710 | VNC_DEBUG("Certificate is valid!\n"); |
| 1711 | } |
| 1712 | |
| 1713 | /* Only support x509 for now */ |
| 1714 | if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509) |
| 1715 | return -1; |
| 1716 | |
| 1717 | if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts))) |
| 1718 | return -1; |
| 1719 | |
| 1720 | for (i = 0 ; i < nCerts ; i++) { |
| 1721 | gnutls_x509_crt_t cert; |
| 1722 | VNC_DEBUG ("Checking certificate chain %d\n", i); |
| 1723 | if (gnutls_x509_crt_init (&cert) < 0) |
| 1724 | return -1; |
| 1725 | |
| 1726 | if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) { |
| 1727 | gnutls_x509_crt_deinit (cert); |
| 1728 | return -1; |
| 1729 | } |
| 1730 | |
| 1731 | if (gnutls_x509_crt_get_expiration_time (cert) < now) { |
| 1732 | VNC_DEBUG("The certificate has expired\n"); |
| 1733 | gnutls_x509_crt_deinit (cert); |
| 1734 | return -1; |
| 1735 | } |
| 1736 | |
| 1737 | if (gnutls_x509_crt_get_activation_time (cert) > now) { |
| 1738 | VNC_DEBUG("The certificate is not yet activated\n"); |
| 1739 | gnutls_x509_crt_deinit (cert); |
| 1740 | return -1; |
| 1741 | } |
| 1742 | |
| 1743 | if (gnutls_x509_crt_get_activation_time (cert) > now) { |
| 1744 | VNC_DEBUG("The certificate is not yet activated\n"); |
| 1745 | gnutls_x509_crt_deinit (cert); |
| 1746 | return -1; |
| 1747 | } |
| 1748 | |
| 1749 | gnutls_x509_crt_deinit (cert); |
| 1750 | } |
| 1751 | |
| 1752 | return 0; |
| 1753 | } |
| 1754 | |
| 1755 | |
| 1756 | static int start_auth_vencrypt_subauth(VncState *vs) |
| 1757 | { |
| 1758 | switch (vs->subauth) { |
| 1759 | case VNC_AUTH_VENCRYPT_TLSNONE: |
| 1760 | case VNC_AUTH_VENCRYPT_X509NONE: |
| 1761 | VNC_DEBUG("Accept TLS auth none\n"); |
| 1762 | vnc_write_u32(vs, 0); /* Accept auth completion */ |
| 1763 | vnc_read_when(vs, protocol_client_init, 1); |
| 1764 | break; |
| 1765 | |
| 1766 | case VNC_AUTH_VENCRYPT_TLSVNC: |
| 1767 | case VNC_AUTH_VENCRYPT_X509VNC: |
| 1768 | VNC_DEBUG("Start TLS auth VNC\n"); |
| 1769 | return start_auth_vnc(vs); |
| 1770 | |
| 1771 | default: /* Should not be possible, but just in case */ |
| 1772 | VNC_DEBUG("Reject auth %d\n", vs->auth); |
| 1773 | vnc_write_u8(vs, 1); |
| 1774 | if (vs->minor >= 8) { |
| 1775 | static const char err[] = "Unsupported authentication type"; |
| 1776 | vnc_write_u32(vs, sizeof(err)); |
| 1777 | vnc_write(vs, err, sizeof(err)); |
| 1778 | } |
| 1779 | vnc_client_error(vs); |
| 1780 | } |
| 1781 | |
| 1782 | return 0; |
| 1783 | } |
| 1784 | |
| 1785 | static void vnc_handshake_io(void *opaque); |
| 1786 | |
| 1787 | static int vnc_continue_handshake(struct VncState *vs) { |
| 1788 | int ret; |
| 1789 | |
| 1790 | if ((ret = gnutls_handshake(vs->tls_session)) < 0) { |
| 1791 | if (!gnutls_error_is_fatal(ret)) { |
| 1792 | VNC_DEBUG("Handshake interrupted (blocking)\n"); |
| 1793 | if (!gnutls_record_get_direction(vs->tls_session)) |
| 1794 | qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs); |
| 1795 | else |
| 1796 | qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs); |
| 1797 | return 0; |
| 1798 | } |
| 1799 | VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret)); |
| 1800 | vnc_client_error(vs); |
| 1801 | return -1; |
| 1802 | } |
| 1803 | |
| 1804 | if (vs->x509verify) { |
| 1805 | if (vnc_validate_certificate(vs) < 0) { |
| 1806 | VNC_DEBUG("Client verification failed\n"); |
| 1807 | vnc_client_error(vs); |
| 1808 | return -1; |
| 1809 | } else { |
| 1810 | VNC_DEBUG("Client verification passed\n"); |
| 1811 | } |
| 1812 | } |
| 1813 | |
| 1814 | VNC_DEBUG("Handshake done, switching to TLS data mode\n"); |
| 1815 | vs->wiremode = VNC_WIREMODE_TLS; |
| 1816 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs); |
| 1817 | |
| 1818 | return start_auth_vencrypt_subauth(vs); |
| 1819 | } |
| 1820 | |
| 1821 | static void vnc_handshake_io(void *opaque) { |
| 1822 | struct VncState *vs = (struct VncState *)opaque; |
| 1823 | |
| 1824 | VNC_DEBUG("Handshake IO continue\n"); |
| 1825 | vnc_continue_handshake(vs); |
| 1826 | } |
| 1827 | |
| 1828 | #define NEED_X509_AUTH(vs) \ |
| 1829 | ((vs)->subauth == VNC_AUTH_VENCRYPT_X509NONE || \ |
| 1830 | (vs)->subauth == VNC_AUTH_VENCRYPT_X509VNC || \ |
| 1831 | (vs)->subauth == VNC_AUTH_VENCRYPT_X509PLAIN) |
| 1832 | |
| 1833 | |
| 1834 | static int vnc_start_tls(struct VncState *vs) { |
| 1835 | static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 }; |
| 1836 | static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 }; |
| 1837 | static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0}; |
| 1838 | static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0}; |
| 1839 | |
| 1840 | VNC_DEBUG("Do TLS setup\n"); |
| 1841 | if (vnc_tls_initialize() < 0) { |
| 1842 | VNC_DEBUG("Failed to init TLS\n"); |
| 1843 | vnc_client_error(vs); |
| 1844 | return -1; |
| 1845 | } |
| 1846 | if (vs->tls_session == NULL) { |
| 1847 | if (gnutls_init(&vs->tls_session, GNUTLS_SERVER) < 0) { |
| 1848 | vnc_client_error(vs); |
| 1849 | return -1; |
| 1850 | } |
| 1851 | |
| 1852 | if (gnutls_set_default_priority(vs->tls_session) < 0) { |
| 1853 | gnutls_deinit(vs->tls_session); |
| 1854 | vs->tls_session = NULL; |
| 1855 | vnc_client_error(vs); |
| 1856 | return -1; |
| 1857 | } |
| 1858 | |
| 1859 | if (gnutls_kx_set_priority(vs->tls_session, NEED_X509_AUTH(vs) ? kx_x509 : kx_anon) < 0) { |
| 1860 | gnutls_deinit(vs->tls_session); |
| 1861 | vs->tls_session = NULL; |
| 1862 | vnc_client_error(vs); |
| 1863 | return -1; |
| 1864 | } |
| 1865 | |
| 1866 | if (gnutls_certificate_type_set_priority(vs->tls_session, cert_type_priority) < 0) { |
| 1867 | gnutls_deinit(vs->tls_session); |
| 1868 | vs->tls_session = NULL; |
| 1869 | vnc_client_error(vs); |
| 1870 | return -1; |
| 1871 | } |
| 1872 | |
| 1873 | if (gnutls_protocol_set_priority(vs->tls_session, protocol_priority) < 0) { |
| 1874 | gnutls_deinit(vs->tls_session); |
| 1875 | vs->tls_session = NULL; |
| 1876 | vnc_client_error(vs); |
| 1877 | return -1; |
| 1878 | } |
| 1879 | |
| 1880 | if (NEED_X509_AUTH(vs)) { |
| 1881 | gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs); |
| 1882 | if (!x509_cred) { |
| 1883 | gnutls_deinit(vs->tls_session); |
| 1884 | vs->tls_session = NULL; |
| 1885 | vnc_client_error(vs); |
| 1886 | return -1; |
| 1887 | } |
| 1888 | if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) { |
| 1889 | gnutls_deinit(vs->tls_session); |
| 1890 | vs->tls_session = NULL; |
| 1891 | gnutls_certificate_free_credentials(x509_cred); |
| 1892 | vnc_client_error(vs); |
| 1893 | return -1; |
| 1894 | } |
| 1895 | if (vs->x509verify) { |
| 1896 | VNC_DEBUG("Requesting a client certificate\n"); |
| 1897 | gnutls_certificate_server_set_request (vs->tls_session, GNUTLS_CERT_REQUEST); |
| 1898 | } |
| 1899 | |
| 1900 | } else { |
| 1901 | gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred(); |
| 1902 | if (!anon_cred) { |
| 1903 | gnutls_deinit(vs->tls_session); |
| 1904 | vs->tls_session = NULL; |
| 1905 | vnc_client_error(vs); |
| 1906 | return -1; |
| 1907 | } |
| 1908 | if (gnutls_credentials_set(vs->tls_session, GNUTLS_CRD_ANON, anon_cred) < 0) { |
| 1909 | gnutls_deinit(vs->tls_session); |
| 1910 | vs->tls_session = NULL; |
| 1911 | gnutls_anon_free_server_credentials(anon_cred); |
| 1912 | vnc_client_error(vs); |
| 1913 | return -1; |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | gnutls_transport_set_ptr(vs->tls_session, (gnutls_transport_ptr_t)vs); |
| 1918 | gnutls_transport_set_push_function(vs->tls_session, vnc_tls_push); |
| 1919 | gnutls_transport_set_pull_function(vs->tls_session, vnc_tls_pull); |
| 1920 | } |
| 1921 | |
| 1922 | VNC_DEBUG("Start TLS handshake process\n"); |
| 1923 | return vnc_continue_handshake(vs); |
| 1924 | } |
| 1925 | |
| 1926 | static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len) |
| 1927 | { |
| 1928 | int auth = read_u32(data, 0); |
| 1929 | |
| 1930 | if (auth != vs->subauth) { |
| 1931 | VNC_DEBUG("Rejecting auth %d\n", auth); |
| 1932 | vnc_write_u8(vs, 0); /* Reject auth */ |
| 1933 | vnc_flush(vs); |
| 1934 | vnc_client_error(vs); |
| 1935 | } else { |
| 1936 | VNC_DEBUG("Accepting auth %d, starting handshake\n", auth); |
| 1937 | vnc_write_u8(vs, 1); /* Accept auth */ |
| 1938 | vnc_flush(vs); |
| 1939 | |
| 1940 | if (vnc_start_tls(vs) < 0) { |
| 1941 | VNC_DEBUG("Failed to complete TLS\n"); |
| 1942 | return 0; |
| 1943 | } |
| 1944 | |
| 1945 | if (vs->wiremode == VNC_WIREMODE_TLS) { |
| 1946 | VNC_DEBUG("Starting VeNCrypt subauth\n"); |
| 1947 | return start_auth_vencrypt_subauth(vs); |
| 1948 | } else { |
| 1949 | VNC_DEBUG("TLS handshake blocked\n"); |
| 1950 | return 0; |
| 1951 | } |
| 1952 | } |
| 1953 | return 0; |
| 1954 | } |
| 1955 | |
| 1956 | static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len) |
| 1957 | { |
| 1958 | if (data[0] != 0 || |
| 1959 | data[1] != 2) { |
| 1960 | VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]); |
| 1961 | vnc_write_u8(vs, 1); /* Reject version */ |
| 1962 | vnc_flush(vs); |
| 1963 | vnc_client_error(vs); |
| 1964 | } else { |
| 1965 | VNC_DEBUG("Sending allowed auth %d\n", vs->subauth); |
| 1966 | vnc_write_u8(vs, 0); /* Accept version */ |
| 1967 | vnc_write_u8(vs, 1); /* Number of sub-auths */ |
| 1968 | vnc_write_u32(vs, vs->subauth); /* The supported auth */ |
| 1969 | vnc_flush(vs); |
| 1970 | vnc_read_when(vs, protocol_client_vencrypt_auth, 4); |
| 1971 | } |
| 1972 | return 0; |
| 1973 | } |
| 1974 | |
| 1975 | static int start_auth_vencrypt(VncState *vs) |
| 1976 | { |
| 1977 | /* Send VeNCrypt version 0.2 */ |
| 1978 | vnc_write_u8(vs, 0); |
| 1979 | vnc_write_u8(vs, 2); |
| 1980 | |
| 1981 | vnc_read_when(vs, protocol_client_vencrypt_init, 2); |
| 1982 | return 0; |
| 1983 | } |
| 1984 | #endif /* CONFIG_VNC_TLS */ |
| 1985 | |
| 1986 | static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len) |
| 1987 | { |
| 1988 | /* We only advertise 1 auth scheme at a time, so client |
| 1989 | * must pick the one we sent. Verify this */ |
| 1990 | if (data[0] != vs->auth) { /* Reject auth */ |
| 1991 | VNC_DEBUG("Reject auth %d\n", (int)data[0]); |
| 1992 | vnc_write_u32(vs, 1); |
| 1993 | if (vs->minor >= 8) { |
| 1994 | static const char err[] = "Authentication failed"; |
| 1995 | vnc_write_u32(vs, sizeof(err)); |
| 1996 | vnc_write(vs, err, sizeof(err)); |
| 1997 | } |
| 1998 | vnc_client_error(vs); |
| 1999 | } else { /* Accept requested auth */ |
| 2000 | VNC_DEBUG("Client requested auth %d\n", (int)data[0]); |
| 2001 | switch (vs->auth) { |
| 2002 | case VNC_AUTH_NONE: |
| 2003 | VNC_DEBUG("Accept auth none\n"); |
| 2004 | if (vs->minor >= 8) { |
| 2005 | vnc_write_u32(vs, 0); /* Accept auth completion */ |
| 2006 | vnc_flush(vs); |
| 2007 | } |
| 2008 | vnc_read_when(vs, protocol_client_init, 1); |
| 2009 | break; |
| 2010 | |
| 2011 | case VNC_AUTH_VNC: |
| 2012 | VNC_DEBUG("Start VNC auth\n"); |
| 2013 | return start_auth_vnc(vs); |
| 2014 | |
| 2015 | #ifdef CONFIG_VNC_TLS |
| 2016 | case VNC_AUTH_VENCRYPT: |
| 2017 | VNC_DEBUG("Accept VeNCrypt auth\n");; |
| 2018 | return start_auth_vencrypt(vs); |
| 2019 | #endif /* CONFIG_VNC_TLS */ |
| 2020 | |
| 2021 | default: /* Should not be possible, but just in case */ |
| 2022 | VNC_DEBUG("Reject auth %d\n", vs->auth); |
| 2023 | vnc_write_u8(vs, 1); |
| 2024 | if (vs->minor >= 8) { |
| 2025 | static const char err[] = "Authentication failed"; |
| 2026 | vnc_write_u32(vs, sizeof(err)); |
| 2027 | vnc_write(vs, err, sizeof(err)); |
| 2028 | } |
| 2029 | vnc_client_error(vs); |
| 2030 | } |
| 2031 | } |
| 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | static int protocol_version(VncState *vs, uint8_t *version, size_t len) |
| 2036 | { |
| 2037 | char local[13]; |
| 2038 | |
| 2039 | memcpy(local, version, 12); |
| 2040 | local[12] = 0; |
| 2041 | |
| 2042 | if (sscanf(local, "RFB %03d.%03d\n", &vs->major, &vs->minor) != 2) { |
| 2043 | VNC_DEBUG("Malformed protocol version %s\n", local); |
| 2044 | vnc_client_error(vs); |
| 2045 | return 0; |
| 2046 | } |
| 2047 | VNC_DEBUG("Client request protocol version %d.%d\n", vs->major, vs->minor); |
| 2048 | if (vs->major != 3 || |
| 2049 | (vs->minor != 3 && |
| 2050 | vs->minor != 4 && |
| 2051 | vs->minor != 5 && |
| 2052 | vs->minor != 7 && |
| 2053 | vs->minor != 8)) { |
| 2054 | VNC_DEBUG("Unsupported client version\n"); |
| 2055 | vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 2056 | vnc_flush(vs); |
| 2057 | vnc_client_error(vs); |
| 2058 | return 0; |
| 2059 | } |
| 2060 | /* Some broken clients report v3.4 or v3.5, which spec requires to be treated |
| 2061 | * as equivalent to v3.3 by servers |
| 2062 | */ |
| 2063 | if (vs->minor == 4 || vs->minor == 5) |
| 2064 | vs->minor = 3; |
| 2065 | |
| 2066 | if (vs->minor == 3) { |
| 2067 | if (vs->auth == VNC_AUTH_NONE) { |
| 2068 | VNC_DEBUG("Tell client auth none\n"); |
| 2069 | vnc_write_u32(vs, vs->auth); |
| 2070 | vnc_flush(vs); |
| 2071 | vnc_read_when(vs, protocol_client_init, 1); |
| 2072 | } else if (vs->auth == VNC_AUTH_VNC) { |
| 2073 | VNC_DEBUG("Tell client VNC auth\n"); |
| 2074 | vnc_write_u32(vs, vs->auth); |
| 2075 | vnc_flush(vs); |
| 2076 | start_auth_vnc(vs); |
| 2077 | } else { |
| 2078 | VNC_DEBUG("Unsupported auth %d for protocol 3.3\n", vs->auth); |
| 2079 | vnc_write_u32(vs, VNC_AUTH_INVALID); |
| 2080 | vnc_flush(vs); |
| 2081 | vnc_client_error(vs); |
| 2082 | } |
| 2083 | } else { |
| 2084 | VNC_DEBUG("Telling client we support auth %d\n", vs->auth); |
| 2085 | vnc_write_u8(vs, 1); /* num auth */ |
| 2086 | vnc_write_u8(vs, vs->auth); |
| 2087 | vnc_read_when(vs, protocol_client_auth, 1); |
| 2088 | vnc_flush(vs); |
| 2089 | } |
| 2090 | |
| 2091 | return 0; |
| 2092 | } |
| 2093 | |
| 2094 | static void vnc_connect(VncState *vs) |
| 2095 | { |
| 2096 | VNC_DEBUG("New client on socket %d\n", vs->csock); |
| 2097 | vs->ds->idle = 0; |
| 2098 | socket_set_nonblock(vs->csock); |
| 2099 | qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, NULL, vs); |
| 2100 | vnc_write(vs, "RFB 003.008\n", 12); |
| 2101 | vnc_flush(vs); |
| 2102 | vnc_read_when(vs, protocol_version, 12); |
| 2103 | memset(vs->old_data, 0, vs->ds->linesize * vs->ds->height); |
| 2104 | memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); |
| 2105 | vs->has_resize = 0; |
| 2106 | vs->has_hextile = 0; |
| 2107 | vs->ds->dpy_copy = NULL; |
| 2108 | vnc_update_client(vs); |
| 2109 | } |
| 2110 | |
| 2111 | static void vnc_listen_read(void *opaque) |
| 2112 | { |
| 2113 | VncState *vs = opaque; |
| 2114 | |
| 2115 | /* Catch-up */ |
| 2116 | vga_hw_update(); |
| 2117 | |
| 2118 | vs->csock = socket_accept(vs->lsock, NULL); |
| 2119 | if (vs->csock != -1) { |
| 2120 | vnc_connect(vs); |
| 2121 | } |
| 2122 | } |
| 2123 | |
| 2124 | extern int parse_host_port(SockAddress* saddr, const char *str); |
| 2125 | |
| 2126 | void vnc_display_init(DisplayState *ds) |
| 2127 | { |
| 2128 | VncState *vs; |
| 2129 | |
| 2130 | vs = qemu_mallocz(sizeof(VncState)); |
| 2131 | if (!vs) |
| 2132 | exit(1); |
| 2133 | |
| 2134 | ds->opaque = vs; |
| 2135 | ds->idle = 1; |
| 2136 | vnc_state = vs; |
| 2137 | vs->display = NULL; |
| 2138 | vs->password = NULL; |
| 2139 | |
| 2140 | vs->lsock = -1; |
| 2141 | vs->csock = -1; |
| 2142 | vs->last_x = -1; |
| 2143 | vs->last_y = -1; |
| 2144 | |
| 2145 | vs->ds = ds; |
| 2146 | |
| 2147 | if (keyboard_layout) |
| 2148 | vs->kbd_layout = init_keyboard_layout(keyboard_layout); |
| 2149 | else |
| 2150 | vs->kbd_layout = init_keyboard_layout("en-us"); |
| 2151 | |
| 2152 | if (!vs->kbd_layout) |
| 2153 | exit(1); |
| 2154 | |
| 2155 | vs->timer = qemu_new_timer(rt_clock, vnc_update_client, vs); |
| 2156 | |
| 2157 | vs->ds->data = NULL; |
| 2158 | vs->ds->dpy_update = vnc_dpy_update; |
| 2159 | vs->ds->dpy_resize = vnc_dpy_resize; |
| 2160 | vs->ds->dpy_refresh = NULL; |
| 2161 | |
| 2162 | vnc_colordepth(vs->ds, 32); |
| 2163 | vnc_dpy_resize(vs->ds, 640, 400); |
| 2164 | } |
| 2165 | |
| 2166 | #ifdef CONFIG_VNC_TLS |
| 2167 | static int vnc_set_x509_credential(VncState *vs, |
| 2168 | const char *certdir, |
| 2169 | const char *filename, |
| 2170 | char **cred, |
| 2171 | int ignoreMissing) |
| 2172 | { |
| 2173 | struct stat sb; |
| 2174 | |
| 2175 | if (*cred) { |
| 2176 | qemu_free(*cred); |
| 2177 | *cred = NULL; |
| 2178 | } |
| 2179 | |
| 2180 | if (!(*cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2))) |
| 2181 | return -1; |
| 2182 | |
| 2183 | strcpy(*cred, certdir); |
| 2184 | strcat(*cred, "/"); |
| 2185 | strcat(*cred, filename); |
| 2186 | |
| 2187 | VNC_DEBUG("Check %s\n", *cred); |
| 2188 | if (stat(*cred, &sb) < 0) { |
| 2189 | qemu_free(*cred); |
| 2190 | *cred = NULL; |
| 2191 | if (ignoreMissing && errno == ENOENT) |
| 2192 | return 0; |
| 2193 | return -1; |
| 2194 | } |
| 2195 | |
| 2196 | return 0; |
| 2197 | } |
| 2198 | |
| 2199 | static int vnc_set_x509_credential_dir(VncState *vs, |
| 2200 | const char *certdir) |
| 2201 | { |
| 2202 | if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0) |
| 2203 | goto cleanup; |
| 2204 | if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0) |
| 2205 | goto cleanup; |
| 2206 | if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0) |
| 2207 | goto cleanup; |
| 2208 | if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0) |
| 2209 | goto cleanup; |
| 2210 | |
| 2211 | return 0; |
| 2212 | |
| 2213 | cleanup: |
| 2214 | qemu_free(vs->x509cacert); |
| 2215 | qemu_free(vs->x509cacrl); |
| 2216 | qemu_free(vs->x509cert); |
| 2217 | qemu_free(vs->x509key); |
| 2218 | vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL; |
| 2219 | return -1; |
| 2220 | } |
| 2221 | #endif /* CONFIG_VNC_TLS */ |
| 2222 | |
| 2223 | void vnc_display_close(DisplayState *ds) |
| 2224 | { |
| 2225 | VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2226 | |
| 2227 | if (vs->display) { |
| 2228 | qemu_free(vs->display); |
| 2229 | vs->display = NULL; |
| 2230 | } |
| 2231 | if (vs->lsock != -1) { |
| 2232 | qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL); |
| 2233 | close(vs->lsock); |
| 2234 | vs->lsock = -1; |
| 2235 | } |
| 2236 | if (vs->csock != -1) { |
| 2237 | qemu_set_fd_handler2(vs->csock, NULL, NULL, NULL, NULL); |
| 2238 | socket_close(vs->csock); |
| 2239 | vs->csock = -1; |
| 2240 | buffer_reset(&vs->input); |
| 2241 | buffer_reset(&vs->output); |
| 2242 | vs->need_update = 0; |
| 2243 | #ifdef CONFIG_VNC_TLS |
| 2244 | if (vs->tls_session) { |
| 2245 | gnutls_deinit(vs->tls_session); |
| 2246 | vs->tls_session = NULL; |
| 2247 | } |
| 2248 | vs->wiremode = VNC_WIREMODE_CLEAR; |
| 2249 | #endif /* CONFIG_VNC_TLS */ |
| 2250 | } |
| 2251 | vs->auth = VNC_AUTH_INVALID; |
| 2252 | #ifdef CONFIG_VNC_TLS |
| 2253 | vs->subauth = VNC_AUTH_INVALID; |
| 2254 | vs->x509verify = 0; |
| 2255 | #endif |
| 2256 | } |
| 2257 | |
| 2258 | int vnc_display_password(DisplayState *ds, const char *password) |
| 2259 | { |
| 2260 | VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2261 | |
| 2262 | if (vs->password) { |
| 2263 | qemu_free(vs->password); |
| 2264 | vs->password = NULL; |
| 2265 | } |
| 2266 | if (password && password[0]) { |
| 2267 | if (!(vs->password = qemu_strdup(password))) |
| 2268 | return -1; |
| 2269 | } |
| 2270 | |
| 2271 | return 0; |
| 2272 | } |
| 2273 | |
| 2274 | int vnc_display_open(DisplayState *ds, const char *display) |
| 2275 | { |
| 2276 | SockAddress addr; |
| 2277 | #ifndef _WIN32 |
| 2278 | const char *p; |
| 2279 | #endif |
| 2280 | int ret; |
| 2281 | VncState *vs = ds ? (VncState *)ds->opaque : vnc_state; |
| 2282 | const char *options; |
| 2283 | int password = 0; |
| 2284 | int reverse = 0; |
| 2285 | #ifdef CONFIG_VNC_TLS |
| 2286 | int tls = 0, x509 = 0; |
| 2287 | #endif |
| 2288 | |
| 2289 | sock_address_init_inet( &addr, SOCK_ADDRESS_INET_ANY, 0 ); |
| 2290 | vs->lsock = -1; |
| 2291 | |
| 2292 | vnc_display_close(ds); |
| 2293 | if (strcmp(display, "none") == 0) |
| 2294 | return 0; |
| 2295 | |
| 2296 | if (!(vs->display = strdup(display))) |
| 2297 | return -1; |
| 2298 | |
| 2299 | options = display; |
| 2300 | while ((options = strchr(options, ','))) { |
| 2301 | options++; |
| 2302 | if (strncmp(options, "password", 8) == 0) { |
| 2303 | password = 1; /* Require password auth */ |
| 2304 | } else if (strncmp(options, "reverse", 7) == 0) { |
| 2305 | reverse = 1; |
| 2306 | #ifdef CONFIG_VNC_TLS |
| 2307 | } else if (strncmp(options, "tls", 3) == 0) { |
| 2308 | tls = 1; /* Require TLS */ |
| 2309 | } else if (strncmp(options, "x509", 4) == 0) { |
| 2310 | char *start, *end; |
| 2311 | x509 = 1; /* Require x509 certificates */ |
| 2312 | if (strncmp(options, "x509verify", 10) == 0) |
| 2313 | vs->x509verify = 1; /* ...and verify client certs */ |
| 2314 | |
| 2315 | /* Now check for 'x509=/some/path' postfix |
| 2316 | * and use that to setup x509 certificate/key paths */ |
| 2317 | start = strchr(options, '='); |
| 2318 | end = strchr(options, ','); |
| 2319 | if (start && (!end || (start < end))) { |
| 2320 | int len = end ? end-(start+1) : strlen(start+1); |
| 2321 | char *path = qemu_malloc(len+1); |
| 2322 | strncpy(path, start+1, len); |
| 2323 | path[len] = '\0'; |
| 2324 | VNC_DEBUG("Trying certificate path '%s'\n", path); |
| 2325 | ret = vnc_set_x509_credential_dir(vs, path); |
| 2326 | qemu_free(path); |
| 2327 | if (ret < 0) { |
| 2328 | fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path); |
| 2329 | goto FAIL; |
| 2330 | } |
| 2331 | } else { |
| 2332 | fprintf(stderr, "No certificate path provided\n"); |
| 2333 | goto FAIL; |
| 2334 | } |
| 2335 | #endif |
| 2336 | } |
| 2337 | } |
| 2338 | |
| 2339 | if (password) { |
| 2340 | #ifdef CONFIG_VNC_TLS |
| 2341 | if (tls) { |
| 2342 | vs->auth = VNC_AUTH_VENCRYPT; |
| 2343 | if (x509) { |
| 2344 | VNC_DEBUG("Initializing VNC server with x509 password auth\n"); |
| 2345 | vs->subauth = VNC_AUTH_VENCRYPT_X509VNC; |
| 2346 | } else { |
| 2347 | VNC_DEBUG("Initializing VNC server with TLS password auth\n"); |
| 2348 | vs->subauth = VNC_AUTH_VENCRYPT_TLSVNC; |
| 2349 | } |
| 2350 | } else { |
| 2351 | #endif |
| 2352 | VNC_DEBUG("Initializing VNC server with password auth\n"); |
| 2353 | vs->auth = VNC_AUTH_VNC; |
| 2354 | #ifdef CONFIG_VNC_TLS |
| 2355 | vs->subauth = VNC_AUTH_INVALID; |
| 2356 | } |
| 2357 | #endif |
| 2358 | } else { |
| 2359 | #ifdef CONFIG_VNC_TLS |
| 2360 | if (tls) { |
| 2361 | vs->auth = VNC_AUTH_VENCRYPT; |
| 2362 | if (x509) { |
| 2363 | VNC_DEBUG("Initializing VNC server with x509 no auth\n"); |
| 2364 | vs->subauth = VNC_AUTH_VENCRYPT_X509NONE; |
| 2365 | } else { |
| 2366 | VNC_DEBUG("Initializing VNC server with TLS no auth\n"); |
| 2367 | vs->subauth = VNC_AUTH_VENCRYPT_TLSNONE; |
| 2368 | } |
| 2369 | } else { |
| 2370 | #endif |
| 2371 | VNC_DEBUG("Initializing VNC server with no auth\n"); |
| 2372 | vs->auth = VNC_AUTH_NONE; |
| 2373 | #ifdef CONFIG_VNC_TLS |
| 2374 | vs->subauth = VNC_AUTH_INVALID; |
| 2375 | } |
| 2376 | #endif |
| 2377 | } |
| 2378 | #ifndef _WIN32 |
| 2379 | if (strstart(display, "unix:", &p)) { |
| 2380 | sock_address_init_unix( &addr, p); |
| 2381 | vs->lsock = socket_create( SOCKET_UNIX, SOCKET_STREAM ); |
| 2382 | if (vs->lsock == -1) { |
| 2383 | fprintf(stderr, "Could not create socket\n"); |
| 2384 | goto FAIL; |
| 2385 | } |
| 2386 | |
| 2387 | if (!reverse) { |
| 2388 | unlink(p); |
| 2389 | } |
| 2390 | } else |
| 2391 | #endif |
| 2392 | { |
| 2393 | if (parse_host_port(&addr, display) < 0) { |
| 2394 | fprintf(stderr, "Could not parse VNC address\n"); |
| 2395 | goto FAIL; |
| 2396 | } |
| 2397 | |
| 2398 | sock_address_set_port(&addr, reverse ? 0 : 5900); |
| 2399 | |
| 2400 | vs->lsock = socket_create_inet( SOCKET_STREAM ); |
| 2401 | if (vs->lsock == -1) { |
| 2402 | fprintf(stderr, "Could not create socket\n"); |
| 2403 | goto FAIL; |
| 2404 | } |
| 2405 | |
| 2406 | ret = socket_set_xreuseaddr(vs->lsock); |
| 2407 | if (ret == -1) { |
| 2408 | fprintf(stderr, "setsockopt() failed\n"); |
| 2409 | goto FAIL; |
| 2410 | } |
| 2411 | } |
| 2412 | |
| 2413 | if (reverse) { |
| 2414 | if (socket_connect(vs->lsock, &addr) == -1) { |
| 2415 | fprintf(stderr, "Connection to VNC client failed\n"); |
| 2416 | goto FAIL; |
| 2417 | } |
| 2418 | vs->csock = vs->lsock; |
| 2419 | vs->lsock = -1; |
| 2420 | vnc_connect(vs); |
| 2421 | return 0; |
| 2422 | } |
| 2423 | |
| 2424 | if (socket_bind(vs->lsock, &addr) == -1) { |
| 2425 | fprintf(stderr, "bind() failed\n"); |
| 2426 | goto FAIL; |
| 2427 | } |
| 2428 | |
| 2429 | if (socket_listen(vs->lsock, 1) == -1) { |
| 2430 | fprintf(stderr, "listen() failed\n"); |
| 2431 | goto FAIL; |
| 2432 | } |
| 2433 | |
| 2434 | return qemu_set_fd_handler2(vs->lsock, vnc_listen_poll, vnc_listen_read, NULL, vs); |
| 2435 | |
| 2436 | FAIL: |
| 2437 | sock_address_done(&addr); |
| 2438 | |
| 2439 | if (vs->lsock >= 0) { |
| 2440 | socket_close(vs->lsock); |
| 2441 | vs->lsock = -1; |
| 2442 | } |
| 2443 | free(vs->display); |
| 2444 | vs->display = NULL; |
| 2445 | return -1; |
| 2446 | } |