San Mehat | a430b2b | 2014-09-23 08:30:51 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is called main.c, because it contains most of the new functions |
| 3 | * for use with LibVNCServer. |
| 4 | * |
| 5 | * LibVNCServer (C) 2001 Johannes E. Schindelin <Johannes.Schindelin@gmx.de> |
| 6 | * Original OSXvnc (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>. |
| 7 | * Original Xvnc (C) 1999 AT&T Laboratories Cambridge. |
| 8 | * All Rights Reserved. |
| 9 | * |
| 10 | * see GPL (latest version) for full details |
| 11 | */ |
| 12 | |
| 13 | #ifdef __STRICT_ANSI__ |
| 14 | #define _BSD_SOURCE |
| 15 | #endif |
| 16 | #include <rfb/rfb.h> |
| 17 | #include <rfb/rfbregion.h> |
| 18 | #include "private.h" |
| 19 | |
| 20 | #include <stdarg.h> |
| 21 | #include <errno.h> |
| 22 | |
| 23 | #ifndef false |
| 24 | #define false 0 |
| 25 | #define true -1 |
| 26 | #endif |
| 27 | |
| 28 | #ifdef LIBVNCSERVER_HAVE_SYS_TYPES_H |
| 29 | #include <sys/types.h> |
| 30 | #endif |
| 31 | |
| 32 | #ifndef WIN32 |
| 33 | #include <sys/socket.h> |
| 34 | #include <netinet/in.h> |
| 35 | #include <unistd.h> |
| 36 | #endif |
| 37 | |
| 38 | #include <signal.h> |
| 39 | #include <time.h> |
| 40 | |
| 41 | static int extMutex_initialized = 0; |
| 42 | static int logMutex_initialized = 0; |
| 43 | #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD |
| 44 | static MUTEX(logMutex); |
| 45 | static MUTEX(extMutex); |
| 46 | #endif |
| 47 | |
| 48 | static int rfbEnableLogging=1; |
| 49 | |
| 50 | #ifdef LIBVNCSERVER_WORDS_BIGENDIAN |
| 51 | char rfbEndianTest = (1==0); |
| 52 | #else |
| 53 | char rfbEndianTest = (1==1); |
| 54 | #endif |
| 55 | |
| 56 | /* |
| 57 | * Protocol extensions |
| 58 | */ |
| 59 | |
| 60 | static rfbProtocolExtension* rfbExtensionHead = NULL; |
| 61 | |
| 62 | /* |
| 63 | * This method registers a list of new extensions. |
| 64 | * It avoids same extension getting registered multiple times. |
| 65 | * The order is not preserved if multiple extensions are |
| 66 | * registered at one-go. |
| 67 | */ |
| 68 | void |
| 69 | rfbRegisterProtocolExtension(rfbProtocolExtension* extension) |
| 70 | { |
| 71 | rfbProtocolExtension *head = rfbExtensionHead, *next = NULL; |
| 72 | |
| 73 | if(extension == NULL) |
| 74 | return; |
| 75 | |
| 76 | next = extension->next; |
| 77 | |
| 78 | if (! extMutex_initialized) { |
| 79 | INIT_MUTEX(extMutex); |
| 80 | extMutex_initialized = 1; |
| 81 | } |
| 82 | |
| 83 | LOCK(extMutex); |
| 84 | |
| 85 | while(head != NULL) { |
| 86 | if(head == extension) { |
| 87 | UNLOCK(extMutex); |
| 88 | rfbRegisterProtocolExtension(next); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | head = head->next; |
| 93 | } |
| 94 | |
| 95 | extension->next = rfbExtensionHead; |
| 96 | rfbExtensionHead = extension; |
| 97 | |
| 98 | UNLOCK(extMutex); |
| 99 | rfbRegisterProtocolExtension(next); |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * This method unregisters a list of extensions. |
| 104 | * These extensions won't be available for any new |
| 105 | * client connection. |
| 106 | */ |
| 107 | void |
| 108 | rfbUnregisterProtocolExtension(rfbProtocolExtension* extension) |
| 109 | { |
| 110 | |
| 111 | rfbProtocolExtension *cur = NULL, *pre = NULL; |
| 112 | |
| 113 | if(extension == NULL) |
| 114 | return; |
| 115 | |
| 116 | if (! extMutex_initialized) { |
| 117 | INIT_MUTEX(extMutex); |
| 118 | extMutex_initialized = 1; |
| 119 | } |
| 120 | |
| 121 | LOCK(extMutex); |
| 122 | |
| 123 | if(rfbExtensionHead == extension) { |
| 124 | rfbExtensionHead = rfbExtensionHead->next; |
| 125 | UNLOCK(extMutex); |
| 126 | rfbUnregisterProtocolExtension(extension->next); |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | cur = pre = rfbExtensionHead; |
| 131 | |
| 132 | while(cur) { |
| 133 | if(cur == extension) { |
| 134 | pre->next = cur->next; |
| 135 | break; |
| 136 | } |
| 137 | pre = cur; |
| 138 | cur = cur->next; |
| 139 | } |
| 140 | |
| 141 | UNLOCK(extMutex); |
| 142 | |
| 143 | rfbUnregisterProtocolExtension(extension->next); |
| 144 | } |
| 145 | |
| 146 | rfbProtocolExtension* rfbGetExtensionIterator() |
| 147 | { |
| 148 | if (! extMutex_initialized) { |
| 149 | INIT_MUTEX(extMutex); |
| 150 | extMutex_initialized = 1; |
| 151 | } |
| 152 | |
| 153 | LOCK(extMutex); |
| 154 | return rfbExtensionHead; |
| 155 | } |
| 156 | |
| 157 | void rfbReleaseExtensionIterator() |
| 158 | { |
| 159 | UNLOCK(extMutex); |
| 160 | } |
| 161 | |
| 162 | rfbBool rfbEnableExtension(rfbClientPtr cl, rfbProtocolExtension* extension, |
| 163 | void* data) |
| 164 | { |
| 165 | rfbExtensionData* extData; |
| 166 | |
| 167 | /* make sure extension is not yet enabled. */ |
| 168 | for(extData = cl->extensions; extData; extData = extData->next) |
| 169 | if(extData->extension == extension) |
| 170 | return FALSE; |
| 171 | |
| 172 | extData = calloc(sizeof(rfbExtensionData),1); |
| 173 | extData->extension = extension; |
| 174 | extData->data = data; |
| 175 | extData->next = cl->extensions; |
| 176 | cl->extensions = extData; |
| 177 | |
| 178 | return TRUE; |
| 179 | } |
| 180 | |
| 181 | rfbBool rfbDisableExtension(rfbClientPtr cl, rfbProtocolExtension* extension) |
| 182 | { |
| 183 | rfbExtensionData* extData; |
| 184 | rfbExtensionData* prevData = NULL; |
| 185 | |
| 186 | for(extData = cl->extensions; extData; extData = extData->next) { |
| 187 | if(extData->extension == extension) { |
| 188 | if(extData->data) |
| 189 | free(extData->data); |
| 190 | if(prevData == NULL) |
| 191 | cl->extensions = extData->next; |
| 192 | else |
| 193 | prevData->next = extData->next; |
| 194 | return TRUE; |
| 195 | } |
| 196 | prevData = extData; |
| 197 | } |
| 198 | |
| 199 | return FALSE; |
| 200 | } |
| 201 | |
| 202 | void* rfbGetExtensionClientData(rfbClientPtr cl, rfbProtocolExtension* extension) |
| 203 | { |
| 204 | rfbExtensionData* data = cl->extensions; |
| 205 | |
| 206 | while(data && data->extension != extension) |
| 207 | data = data->next; |
| 208 | |
| 209 | if(data == NULL) { |
| 210 | rfbLog("Extension is not enabled !\n"); |
| 211 | /* rfbCloseClient(cl); */ |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | return data->data; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Logging |
| 220 | */ |
| 221 | |
| 222 | void rfbLogEnable(int enabled) { |
| 223 | rfbEnableLogging=enabled; |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * rfbLog prints a time-stamped message to the log file (stderr). |
| 228 | */ |
| 229 | |
| 230 | static void |
| 231 | rfbDefaultLog(const char *format, ...) |
| 232 | { |
| 233 | va_list args; |
| 234 | char buf[256]; |
| 235 | time_t log_clock; |
| 236 | |
| 237 | if(!rfbEnableLogging) |
| 238 | return; |
| 239 | |
| 240 | if (! logMutex_initialized) { |
| 241 | INIT_MUTEX(logMutex); |
| 242 | logMutex_initialized = 1; |
| 243 | } |
| 244 | |
| 245 | LOCK(logMutex); |
| 246 | va_start(args, format); |
| 247 | |
| 248 | time(&log_clock); |
| 249 | strftime(buf, 255, "%d/%m/%Y %X ", localtime(&log_clock)); |
| 250 | fprintf(stderr, "%s", buf); |
| 251 | |
| 252 | vfprintf(stderr, format, args); |
| 253 | fflush(stderr); |
| 254 | |
| 255 | va_end(args); |
| 256 | UNLOCK(logMutex); |
| 257 | } |
| 258 | |
| 259 | rfbLogProc rfbLog=rfbDefaultLog; |
| 260 | rfbLogProc rfbErr=rfbDefaultLog; |
| 261 | |
| 262 | void rfbLogPerror(const char *str) |
| 263 | { |
| 264 | rfbErr("%s: %s\n", str, strerror(errno)); |
| 265 | } |
| 266 | |
| 267 | void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy) |
| 268 | { |
| 269 | rfbClientIteratorPtr iterator; |
| 270 | rfbClientPtr cl; |
| 271 | |
| 272 | iterator=rfbGetClientIterator(rfbScreen); |
| 273 | while((cl=rfbClientIteratorNext(iterator))) { |
| 274 | LOCK(cl->updateMutex); |
| 275 | if(cl->useCopyRect) { |
| 276 | sraRegionPtr modifiedRegionBackup; |
| 277 | if(!sraRgnEmpty(cl->copyRegion)) { |
| 278 | if(cl->copyDX!=dx || cl->copyDY!=dy) { |
| 279 | /* if a copyRegion was not yet executed, treat it as a |
| 280 | * modifiedRegion. The idea: in this case it could be |
| 281 | * source of the new copyRect or modified anyway. */ |
| 282 | sraRgnOr(cl->modifiedRegion,cl->copyRegion); |
| 283 | sraRgnMakeEmpty(cl->copyRegion); |
| 284 | } else { |
| 285 | /* we have to set the intersection of the source of the copy |
| 286 | * and the old copy to modified. */ |
| 287 | modifiedRegionBackup=sraRgnCreateRgn(copyRegion); |
| 288 | sraRgnOffset(modifiedRegionBackup,-dx,-dy); |
| 289 | sraRgnAnd(modifiedRegionBackup,cl->copyRegion); |
| 290 | sraRgnOr(cl->modifiedRegion,modifiedRegionBackup); |
| 291 | sraRgnDestroy(modifiedRegionBackup); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | sraRgnOr(cl->copyRegion,copyRegion); |
| 296 | cl->copyDX = dx; |
| 297 | cl->copyDY = dy; |
| 298 | |
| 299 | /* if there were modified regions, which are now copied, |
| 300 | * mark them as modified, because the source of these can be overlapped |
| 301 | * either by new modified or now copied regions. */ |
| 302 | modifiedRegionBackup=sraRgnCreateRgn(cl->modifiedRegion); |
| 303 | sraRgnOffset(modifiedRegionBackup,dx,dy); |
| 304 | sraRgnAnd(modifiedRegionBackup,cl->copyRegion); |
| 305 | sraRgnOr(cl->modifiedRegion,modifiedRegionBackup); |
| 306 | sraRgnDestroy(modifiedRegionBackup); |
| 307 | |
| 308 | if(!cl->enableCursorShapeUpdates) { |
| 309 | /* |
| 310 | * n.b. (dx, dy) is the vector pointing in the direction the |
| 311 | * copyrect displacement will take place. copyRegion is the |
| 312 | * destination rectangle (say), not the source rectangle. |
| 313 | */ |
| 314 | sraRegionPtr cursorRegion; |
| 315 | int x = cl->cursorX - cl->screen->cursor->xhot; |
| 316 | int y = cl->cursorY - cl->screen->cursor->yhot; |
| 317 | int w = cl->screen->cursor->width; |
| 318 | int h = cl->screen->cursor->height; |
| 319 | |
| 320 | cursorRegion = sraRgnCreateRect(x, y, x + w, y + h); |
| 321 | sraRgnAnd(cursorRegion, cl->copyRegion); |
| 322 | if(!sraRgnEmpty(cursorRegion)) { |
| 323 | /* |
| 324 | * current cursor rect overlaps with the copy region *dest*, |
| 325 | * mark it as modified since we won't copy-rect stuff to it. |
| 326 | */ |
| 327 | sraRgnOr(cl->modifiedRegion, cursorRegion); |
| 328 | } |
| 329 | sraRgnDestroy(cursorRegion); |
| 330 | |
| 331 | cursorRegion = sraRgnCreateRect(x, y, x + w, y + h); |
| 332 | /* displace it to check for overlap with copy region source: */ |
| 333 | sraRgnOffset(cursorRegion, dx, dy); |
| 334 | sraRgnAnd(cursorRegion, cl->copyRegion); |
| 335 | if(!sraRgnEmpty(cursorRegion)) { |
| 336 | /* |
| 337 | * current cursor rect overlaps with the copy region *source*, |
| 338 | * mark the *displaced* cursorRegion as modified since we |
| 339 | * won't copyrect stuff to it. |
| 340 | */ |
| 341 | sraRgnOr(cl->modifiedRegion, cursorRegion); |
| 342 | } |
| 343 | sraRgnDestroy(cursorRegion); |
| 344 | } |
| 345 | |
| 346 | } else { |
| 347 | sraRgnOr(cl->modifiedRegion,copyRegion); |
| 348 | } |
| 349 | TSIGNAL(cl->updateCond); |
| 350 | UNLOCK(cl->updateMutex); |
| 351 | } |
| 352 | |
| 353 | rfbReleaseClientIterator(iterator); |
| 354 | } |
| 355 | |
| 356 | void rfbDoCopyRegion(rfbScreenInfoPtr screen,sraRegionPtr copyRegion,int dx,int dy) |
| 357 | { |
| 358 | sraRectangleIterator* i; |
| 359 | sraRect rect; |
| 360 | int j,widthInBytes,bpp=screen->serverFormat.bitsPerPixel/8, |
| 361 | rowstride=screen->paddedWidthInBytes; |
| 362 | char *in,*out; |
| 363 | |
| 364 | /* copy it, really */ |
| 365 | i = sraRgnGetReverseIterator(copyRegion,dx<0,dy<0); |
| 366 | while(sraRgnIteratorNext(i,&rect)) { |
| 367 | widthInBytes = (rect.x2-rect.x1)*bpp; |
| 368 | out = screen->frameBuffer+rect.x1*bpp+rect.y1*rowstride; |
| 369 | in = screen->frameBuffer+(rect.x1-dx)*bpp+(rect.y1-dy)*rowstride; |
| 370 | if(dy<0) |
| 371 | for(j=rect.y1;j<rect.y2;j++,out+=rowstride,in+=rowstride) |
| 372 | memmove(out,in,widthInBytes); |
| 373 | else { |
| 374 | out += rowstride*(rect.y2-rect.y1-1); |
| 375 | in += rowstride*(rect.y2-rect.y1-1); |
| 376 | for(j=rect.y2-1;j>=rect.y1;j--,out-=rowstride,in-=rowstride) |
| 377 | memmove(out,in,widthInBytes); |
| 378 | } |
| 379 | } |
| 380 | sraRgnReleaseIterator(i); |
| 381 | |
| 382 | rfbScheduleCopyRegion(screen,copyRegion,dx,dy); |
| 383 | } |
| 384 | |
| 385 | void rfbDoCopyRect(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2,int dx,int dy) |
| 386 | { |
| 387 | sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2); |
| 388 | rfbDoCopyRegion(screen,region,dx,dy); |
| 389 | sraRgnDestroy(region); |
| 390 | } |
| 391 | |
| 392 | void rfbScheduleCopyRect(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2,int dx,int dy) |
| 393 | { |
| 394 | sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2); |
| 395 | rfbScheduleCopyRegion(screen,region,dx,dy); |
| 396 | sraRgnDestroy(region); |
| 397 | } |
| 398 | |
| 399 | void rfbMarkRegionAsModified(rfbScreenInfoPtr screen,sraRegionPtr modRegion) |
| 400 | { |
| 401 | rfbClientIteratorPtr iterator; |
| 402 | rfbClientPtr cl; |
| 403 | |
| 404 | iterator=rfbGetClientIterator(screen); |
| 405 | while((cl=rfbClientIteratorNext(iterator))) { |
| 406 | LOCK(cl->updateMutex); |
| 407 | sraRgnOr(cl->modifiedRegion,modRegion); |
| 408 | TSIGNAL(cl->updateCond); |
| 409 | UNLOCK(cl->updateMutex); |
| 410 | } |
| 411 | |
| 412 | rfbReleaseClientIterator(iterator); |
| 413 | } |
| 414 | |
| 415 | void rfbScaledScreenUpdate(rfbScreenInfoPtr screen, int x1, int y1, int x2, int y2); |
| 416 | void rfbMarkRectAsModified(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2) |
| 417 | { |
| 418 | sraRegionPtr region; |
| 419 | int i; |
| 420 | |
| 421 | if(x1>x2) { i=x1; x1=x2; x2=i; } |
| 422 | if(x1<0) x1=0; |
| 423 | if(x2>screen->width) x2=screen->width; |
| 424 | if(x1==x2) return; |
| 425 | |
| 426 | if(y1>y2) { i=y1; y1=y2; y2=i; } |
| 427 | if(y1<0) y1=0; |
| 428 | if(y2>screen->height) y2=screen->height; |
| 429 | if(y1==y2) return; |
| 430 | |
| 431 | /* update scaled copies for this rectangle */ |
| 432 | rfbScaledScreenUpdate(screen,x1,y1,x2,y2); |
| 433 | |
| 434 | region = sraRgnCreateRect(x1,y1,x2,y2); |
| 435 | rfbMarkRegionAsModified(screen,region); |
| 436 | sraRgnDestroy(region); |
| 437 | } |
| 438 | |
| 439 | #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD |
| 440 | #include <unistd.h> |
| 441 | |
| 442 | static void * |
| 443 | clientOutput(void *data) |
| 444 | { |
| 445 | rfbClientPtr cl = (rfbClientPtr)data; |
| 446 | rfbBool haveUpdate; |
| 447 | sraRegion* updateRegion; |
| 448 | |
| 449 | while (1) { |
| 450 | haveUpdate = false; |
| 451 | while (!haveUpdate) { |
| 452 | if (cl->sock == -1) { |
| 453 | /* Client has disconnected. */ |
| 454 | return NULL; |
| 455 | } |
| 456 | if (cl->state != RFB_NORMAL || cl->onHold) { |
| 457 | /* just sleep until things get normal */ |
| 458 | usleep(cl->screen->deferUpdateTime * 1000); |
| 459 | continue; |
| 460 | } |
| 461 | |
| 462 | LOCK(cl->updateMutex); |
| 463 | |
| 464 | if (sraRgnEmpty(cl->requestedRegion)) { |
| 465 | ; /* always require a FB Update Request (otherwise can crash.) */ |
| 466 | } else { |
| 467 | haveUpdate = FB_UPDATE_PENDING(cl); |
| 468 | if(!haveUpdate) { |
| 469 | updateRegion = sraRgnCreateRgn(cl->modifiedRegion); |
| 470 | haveUpdate = sraRgnAnd(updateRegion,cl->requestedRegion); |
| 471 | sraRgnDestroy(updateRegion); |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | if (!haveUpdate) { |
| 476 | WAIT(cl->updateCond, cl->updateMutex); |
| 477 | } |
| 478 | |
| 479 | UNLOCK(cl->updateMutex); |
| 480 | } |
| 481 | |
| 482 | /* OK, now, to save bandwidth, wait a little while for more |
| 483 | updates to come along. */ |
| 484 | usleep(cl->screen->deferUpdateTime * 1000); |
| 485 | |
| 486 | /* Now, get the region we're going to update, and remove |
| 487 | it from cl->modifiedRegion _before_ we send the update. |
| 488 | That way, if anything that overlaps the region we're sending |
| 489 | is updated, we'll be sure to do another update later. */ |
| 490 | LOCK(cl->updateMutex); |
| 491 | updateRegion = sraRgnCreateRgn(cl->modifiedRegion); |
| 492 | UNLOCK(cl->updateMutex); |
| 493 | |
| 494 | /* Now actually send the update. */ |
| 495 | rfbIncrClientRef(cl); |
| 496 | LOCK(cl->sendMutex); |
| 497 | rfbSendFramebufferUpdate(cl, updateRegion); |
| 498 | UNLOCK(cl->sendMutex); |
| 499 | rfbDecrClientRef(cl); |
| 500 | |
| 501 | sraRgnDestroy(updateRegion); |
| 502 | } |
| 503 | |
| 504 | /* Not reached. */ |
| 505 | return NULL; |
| 506 | } |
| 507 | |
| 508 | static void * |
| 509 | clientInput(void *data) |
| 510 | { |
| 511 | rfbClientPtr cl = (rfbClientPtr)data; |
| 512 | pthread_t output_thread; |
| 513 | pthread_create(&output_thread, NULL, clientOutput, (void *)cl); |
| 514 | |
| 515 | while (1) { |
| 516 | fd_set rfds, wfds, efds; |
| 517 | struct timeval tv; |
| 518 | int n; |
| 519 | |
| 520 | if (cl->sock == -1) { |
| 521 | /* Client has disconnected. */ |
| 522 | break; |
| 523 | } |
| 524 | |
| 525 | FD_ZERO(&rfds); |
| 526 | FD_SET(cl->sock, &rfds); |
| 527 | FD_ZERO(&efds); |
| 528 | FD_SET(cl->sock, &efds); |
| 529 | |
| 530 | /* Are we transferring a file in the background? */ |
| 531 | FD_ZERO(&wfds); |
| 532 | if ((cl->fileTransfer.fd!=-1) && (cl->fileTransfer.sending==1)) |
| 533 | FD_SET(cl->sock, &wfds); |
| 534 | |
| 535 | tv.tv_sec = 60; /* 1 minute */ |
| 536 | tv.tv_usec = 0; |
| 537 | n = select(cl->sock + 1, &rfds, &wfds, &efds, &tv); |
| 538 | if (n < 0) { |
| 539 | rfbLogPerror("ReadExact: select"); |
| 540 | break; |
| 541 | } |
| 542 | if (n == 0) /* timeout */ |
| 543 | { |
| 544 | rfbSendFileTransferChunk(cl); |
| 545 | continue; |
| 546 | } |
| 547 | |
| 548 | /* We have some space on the transmit queue, send some data */ |
| 549 | if (FD_ISSET(cl->sock, &wfds)) |
| 550 | rfbSendFileTransferChunk(cl); |
| 551 | |
| 552 | if (FD_ISSET(cl->sock, &rfds) || FD_ISSET(cl->sock, &efds)) |
| 553 | rfbProcessClientMessage(cl); |
| 554 | } |
| 555 | |
| 556 | /* Get rid of the output thread. */ |
| 557 | LOCK(cl->updateMutex); |
| 558 | TSIGNAL(cl->updateCond); |
| 559 | UNLOCK(cl->updateMutex); |
| 560 | IF_PTHREADS(pthread_join(output_thread, NULL)); |
| 561 | |
| 562 | rfbClientConnectionGone(cl); |
| 563 | |
| 564 | return NULL; |
| 565 | } |
| 566 | |
| 567 | static void* |
| 568 | listenerRun(void *data) |
| 569 | { |
| 570 | rfbScreenInfoPtr screen=(rfbScreenInfoPtr)data; |
| 571 | int client_fd; |
| 572 | struct sockaddr_storage peer; |
| 573 | rfbClientPtr cl = NULL; |
| 574 | socklen_t len; |
| 575 | fd_set listen_fds; /* temp file descriptor list for select() */ |
| 576 | |
| 577 | /* TODO: this thread wont die by restarting the server */ |
| 578 | /* TODO: HTTP is not handled */ |
| 579 | while (1) { |
| 580 | client_fd = -1; |
| 581 | FD_ZERO(&listen_fds); |
| 582 | if(screen->listenSock >= 0) |
| 583 | FD_SET(screen->listenSock, &listen_fds); |
| 584 | if(screen->listen6Sock >= 0) |
| 585 | FD_SET(screen->listen6Sock, &listen_fds); |
| 586 | |
| 587 | if (select(screen->maxFd+1, &listen_fds, NULL, NULL, NULL) == -1) { |
| 588 | rfbLogPerror("listenerRun: error in select"); |
| 589 | return NULL; |
| 590 | } |
| 591 | |
| 592 | /* there is something on the listening sockets, handle new connections */ |
| 593 | len = sizeof (peer); |
| 594 | if (FD_ISSET(screen->listenSock, &listen_fds)) |
| 595 | client_fd = accept(screen->listenSock, (struct sockaddr*)&peer, &len); |
| 596 | else if (FD_ISSET(screen->listen6Sock, &listen_fds)) |
| 597 | client_fd = accept(screen->listen6Sock, (struct sockaddr*)&peer, &len); |
| 598 | |
| 599 | if(client_fd >= 0) |
| 600 | cl = rfbNewClient(screen,client_fd); |
| 601 | if (cl && !cl->onHold ) |
| 602 | rfbStartOnHoldClient(cl); |
| 603 | } |
| 604 | return(NULL); |
| 605 | } |
| 606 | |
| 607 | void |
| 608 | rfbStartOnHoldClient(rfbClientPtr cl) |
| 609 | { |
| 610 | pthread_create(&cl->client_thread, NULL, clientInput, (void *)cl); |
| 611 | } |
| 612 | |
| 613 | #else |
| 614 | |
| 615 | void |
| 616 | rfbStartOnHoldClient(rfbClientPtr cl) |
| 617 | { |
| 618 | cl->onHold = FALSE; |
| 619 | } |
| 620 | |
| 621 | #endif |
| 622 | |
| 623 | void |
| 624 | rfbRefuseOnHoldClient(rfbClientPtr cl) |
| 625 | { |
| 626 | rfbCloseClient(cl); |
| 627 | rfbClientConnectionGone(cl); |
| 628 | } |
| 629 | |
| 630 | static void |
| 631 | rfbDefaultKbdAddEvent(rfbBool down, rfbKeySym keySym, rfbClientPtr cl) |
| 632 | { |
| 633 | } |
| 634 | |
| 635 | void |
| 636 | rfbDefaultPtrAddEvent(int buttonMask, int x, int y, rfbClientPtr cl) |
| 637 | { |
| 638 | rfbClientIteratorPtr iterator; |
| 639 | rfbClientPtr other_client; |
| 640 | rfbScreenInfoPtr s = cl->screen; |
| 641 | |
| 642 | if (x != s->cursorX || y != s->cursorY) { |
| 643 | LOCK(s->cursorMutex); |
| 644 | s->cursorX = x; |
| 645 | s->cursorY = y; |
| 646 | UNLOCK(s->cursorMutex); |
| 647 | |
| 648 | /* The cursor was moved by this client, so don't send CursorPos. */ |
| 649 | if (cl->enableCursorPosUpdates) |
| 650 | cl->cursorWasMoved = FALSE; |
| 651 | |
| 652 | /* But inform all remaining clients about this cursor movement. */ |
| 653 | iterator = rfbGetClientIterator(s); |
| 654 | while ((other_client = rfbClientIteratorNext(iterator)) != NULL) { |
| 655 | if (other_client != cl && other_client->enableCursorPosUpdates) { |
| 656 | other_client->cursorWasMoved = TRUE; |
| 657 | } |
| 658 | } |
| 659 | rfbReleaseClientIterator(iterator); |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | static void rfbDefaultSetXCutText(char* text, int len, rfbClientPtr cl) |
| 664 | { |
| 665 | } |
| 666 | |
| 667 | /* TODO: add a nice VNC or RFB cursor */ |
| 668 | |
| 669 | #if defined(WIN32) || defined(sparc) || !defined(NO_STRICT_ANSI) |
| 670 | static rfbCursor myCursor = |
| 671 | { |
| 672 | FALSE, FALSE, FALSE, FALSE, |
| 673 | (unsigned char*)"\000\102\044\030\044\102\000", |
| 674 | (unsigned char*)"\347\347\176\074\176\347\347", |
| 675 | 8, 7, 3, 3, |
| 676 | 0, 0, 0, |
| 677 | 0xffff, 0xffff, 0xffff, |
| 678 | NULL |
| 679 | }; |
| 680 | #else |
| 681 | static rfbCursor myCursor = |
| 682 | { |
| 683 | cleanup: FALSE, |
| 684 | cleanupSource: FALSE, |
| 685 | cleanupMask: FALSE, |
| 686 | cleanupRichSource: FALSE, |
| 687 | source: "\000\102\044\030\044\102\000", |
| 688 | mask: "\347\347\176\074\176\347\347", |
| 689 | width: 8, height: 7, xhot: 3, yhot: 3, |
| 690 | foreRed: 0, foreGreen: 0, foreBlue: 0, |
| 691 | backRed: 0xffff, backGreen: 0xffff, backBlue: 0xffff, |
| 692 | richSource: NULL |
| 693 | }; |
| 694 | #endif |
| 695 | |
| 696 | static rfbCursorPtr rfbDefaultGetCursorPtr(rfbClientPtr cl) |
| 697 | { |
| 698 | return(cl->screen->cursor); |
| 699 | } |
| 700 | |
| 701 | /* response is cl->authChallenge vncEncrypted with passwd */ |
| 702 | static rfbBool rfbDefaultPasswordCheck(rfbClientPtr cl,const char* response,int len) |
| 703 | { |
| 704 | int i; |
| 705 | char *passwd=rfbDecryptPasswdFromFile(cl->screen->authPasswdData); |
| 706 | |
| 707 | if(!passwd) { |
| 708 | rfbErr("Couldn't read password file: %s\n",cl->screen->authPasswdData); |
| 709 | return(FALSE); |
| 710 | } |
| 711 | |
| 712 | rfbEncryptBytes(cl->authChallenge, passwd); |
| 713 | |
| 714 | /* Lose the password from memory */ |
| 715 | for (i = strlen(passwd); i >= 0; i--) { |
| 716 | passwd[i] = '\0'; |
| 717 | } |
| 718 | |
| 719 | free(passwd); |
| 720 | |
| 721 | if (memcmp(cl->authChallenge, response, len) != 0) { |
| 722 | rfbErr("authProcessClientMessage: authentication failed from %s\n", |
| 723 | cl->host); |
| 724 | return(FALSE); |
| 725 | } |
| 726 | |
| 727 | return(TRUE); |
| 728 | } |
| 729 | |
| 730 | /* for this method, authPasswdData is really a pointer to an array |
| 731 | of char*'s, where the last pointer is 0. */ |
| 732 | rfbBool rfbCheckPasswordByList(rfbClientPtr cl,const char* response,int len) |
| 733 | { |
| 734 | char **passwds; |
| 735 | int i=0; |
| 736 | |
| 737 | for(passwds=(char**)cl->screen->authPasswdData;*passwds;passwds++,i++) { |
| 738 | uint8_t auth_tmp[CHALLENGESIZE]; |
| 739 | memcpy((char *)auth_tmp, (char *)cl->authChallenge, CHALLENGESIZE); |
| 740 | rfbEncryptBytes(auth_tmp, *passwds); |
| 741 | |
| 742 | if (memcmp(auth_tmp, response, len) == 0) { |
| 743 | if(i>=cl->screen->authPasswdFirstViewOnly) |
| 744 | cl->viewOnly=TRUE; |
| 745 | return(TRUE); |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | rfbErr("authProcessClientMessage: authentication failed from %s\n", |
| 750 | cl->host); |
| 751 | return(FALSE); |
| 752 | } |
| 753 | |
| 754 | void rfbDoNothingWithClient(rfbClientPtr cl) |
| 755 | { |
| 756 | } |
| 757 | |
| 758 | static enum rfbNewClientAction rfbDefaultNewClientHook(rfbClientPtr cl) |
| 759 | { |
| 760 | return RFB_CLIENT_ACCEPT; |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * Update server's pixel format in screenInfo structure. This |
| 765 | * function is called from rfbGetScreen() and rfbNewFramebuffer(). |
| 766 | */ |
| 767 | |
| 768 | static void rfbInitServerFormat(rfbScreenInfoPtr screen, int bitsPerSample) |
| 769 | { |
| 770 | rfbPixelFormat* format=&screen->serverFormat; |
| 771 | |
| 772 | format->bitsPerPixel = screen->bitsPerPixel; |
| 773 | format->depth = screen->depth; |
| 774 | format->bigEndian = rfbEndianTest?FALSE:TRUE; |
| 775 | format->trueColour = TRUE; |
| 776 | screen->colourMap.count = 0; |
| 777 | screen->colourMap.is16 = 0; |
| 778 | screen->colourMap.data.bytes = NULL; |
| 779 | |
| 780 | if (format->bitsPerPixel == 8) { |
| 781 | format->redMax = 7; |
| 782 | format->greenMax = 7; |
| 783 | format->blueMax = 3; |
| 784 | format->redShift = 0; |
| 785 | format->greenShift = 3; |
| 786 | format->blueShift = 6; |
| 787 | } else { |
| 788 | format->redMax = (1 << bitsPerSample) - 1; |
| 789 | format->greenMax = (1 << bitsPerSample) - 1; |
| 790 | format->blueMax = (1 << bitsPerSample) - 1; |
| 791 | if(rfbEndianTest) { |
| 792 | format->redShift = 0; |
| 793 | format->greenShift = bitsPerSample; |
| 794 | format->blueShift = bitsPerSample * 2; |
| 795 | } else { |
| 796 | if(format->bitsPerPixel==8*3) { |
| 797 | format->redShift = bitsPerSample*2; |
| 798 | format->greenShift = bitsPerSample*1; |
| 799 | format->blueShift = 0; |
| 800 | } else { |
| 801 | format->redShift = bitsPerSample*3; |
| 802 | format->greenShift = bitsPerSample*2; |
| 803 | format->blueShift = bitsPerSample; |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | rfbScreenInfoPtr rfbGetScreen(int* argc,char** argv, |
| 810 | int width,int height,int bitsPerSample,int samplesPerPixel, |
| 811 | int bytesPerPixel) |
| 812 | { |
| 813 | rfbScreenInfoPtr screen=calloc(sizeof(rfbScreenInfo),1); |
| 814 | |
| 815 | if (! logMutex_initialized) { |
| 816 | INIT_MUTEX(logMutex); |
| 817 | logMutex_initialized = 1; |
| 818 | } |
| 819 | |
| 820 | |
| 821 | if(width&3) |
| 822 | rfbErr("WARNING: Width (%d) is not a multiple of 4. VncViewer has problems with that.\n",width); |
| 823 | |
| 824 | screen->autoPort=FALSE; |
| 825 | screen->clientHead=NULL; |
| 826 | screen->pointerClient=NULL; |
| 827 | screen->port=5900; |
| 828 | screen->ipv6port=5900; |
| 829 | screen->socketState=RFB_SOCKET_INIT; |
| 830 | |
| 831 | screen->inetdInitDone = FALSE; |
| 832 | screen->inetdSock=-1; |
| 833 | |
| 834 | screen->udpSock=-1; |
| 835 | screen->udpSockConnected=FALSE; |
| 836 | screen->udpPort=0; |
| 837 | screen->udpClient=NULL; |
| 838 | |
| 839 | screen->maxFd=0; |
| 840 | screen->listenSock=-1; |
| 841 | screen->listen6Sock=-1; |
| 842 | |
| 843 | screen->httpInitDone=FALSE; |
| 844 | screen->httpEnableProxyConnect=FALSE; |
| 845 | screen->httpPort=0; |
| 846 | screen->http6Port=0; |
| 847 | screen->httpDir=NULL; |
| 848 | screen->httpListenSock=-1; |
| 849 | screen->httpListen6Sock=-1; |
| 850 | screen->httpSock=-1; |
| 851 | |
| 852 | screen->desktopName = "LibVNCServer"; |
| 853 | screen->alwaysShared = FALSE; |
| 854 | screen->neverShared = FALSE; |
| 855 | screen->dontDisconnect = FALSE; |
| 856 | screen->authPasswdData = NULL; |
| 857 | screen->authPasswdFirstViewOnly = 1; |
| 858 | |
| 859 | screen->width = width; |
| 860 | screen->height = height; |
| 861 | screen->bitsPerPixel = screen->depth = 8*bytesPerPixel; |
| 862 | |
| 863 | screen->passwordCheck = rfbDefaultPasswordCheck; |
| 864 | |
| 865 | screen->ignoreSIGPIPE = TRUE; |
| 866 | |
| 867 | /* disable progressive updating per default */ |
| 868 | screen->progressiveSliceHeight = 0; |
| 869 | |
| 870 | screen->listenInterface = htonl(INADDR_ANY); |
| 871 | |
| 872 | screen->deferUpdateTime=5; |
| 873 | screen->maxRectsPerUpdate=50; |
| 874 | |
| 875 | screen->handleEventsEagerly = FALSE; |
| 876 | |
| 877 | screen->protocolMajorVersion = rfbProtocolMajorVersion; |
| 878 | screen->protocolMinorVersion = rfbProtocolMinorVersion; |
| 879 | |
| 880 | screen->permitFileTransfer = FALSE; |
| 881 | |
| 882 | if(!rfbProcessArguments(screen,argc,argv)) { |
| 883 | free(screen); |
| 884 | return NULL; |
| 885 | } |
| 886 | |
| 887 | #ifdef WIN32 |
| 888 | { |
| 889 | DWORD dummy=255; |
| 890 | GetComputerName(screen->thisHost,&dummy); |
| 891 | } |
| 892 | #else |
| 893 | gethostname(screen->thisHost, 255); |
| 894 | #endif |
| 895 | |
| 896 | screen->paddedWidthInBytes = width*bytesPerPixel; |
| 897 | |
| 898 | /* format */ |
| 899 | |
| 900 | rfbInitServerFormat(screen, bitsPerSample); |
| 901 | |
| 902 | /* cursor */ |
| 903 | |
| 904 | screen->cursorX=screen->cursorY=screen->underCursorBufferLen=0; |
| 905 | screen->underCursorBuffer=NULL; |
| 906 | screen->dontConvertRichCursorToXCursor = FALSE; |
| 907 | screen->cursor = &myCursor; |
| 908 | INIT_MUTEX(screen->cursorMutex); |
| 909 | |
| 910 | IF_PTHREADS(screen->backgroundLoop = FALSE); |
| 911 | |
| 912 | /* proc's and hook's */ |
| 913 | |
| 914 | screen->kbdAddEvent = rfbDefaultKbdAddEvent; |
| 915 | screen->kbdReleaseAllKeys = rfbDoNothingWithClient; |
| 916 | screen->ptrAddEvent = rfbDefaultPtrAddEvent; |
| 917 | screen->setXCutText = rfbDefaultSetXCutText; |
| 918 | screen->getCursorPtr = rfbDefaultGetCursorPtr; |
| 919 | screen->setTranslateFunction = rfbSetTranslateFunction; |
| 920 | screen->newClientHook = rfbDefaultNewClientHook; |
| 921 | screen->displayHook = NULL; |
| 922 | screen->displayFinishedHook = NULL; |
| 923 | screen->getKeyboardLedStateHook = NULL; |
| 924 | screen->xvpHook = NULL; |
| 925 | |
| 926 | /* initialize client list and iterator mutex */ |
| 927 | rfbClientListInit(screen); |
| 928 | |
| 929 | return(screen); |
| 930 | } |
| 931 | |
| 932 | /* |
| 933 | * Switch to another framebuffer (maybe of different size and color |
| 934 | * format). Clients supporting NewFBSize pseudo-encoding will change |
| 935 | * their local framebuffer dimensions if necessary. |
| 936 | * NOTE: Rich cursor data should be converted to new pixel format by |
| 937 | * the caller. |
| 938 | */ |
| 939 | |
| 940 | void rfbNewFramebuffer(rfbScreenInfoPtr screen, char *framebuffer, |
| 941 | int width, int height, |
| 942 | int bitsPerSample, int samplesPerPixel, |
| 943 | int bytesPerPixel) |
| 944 | { |
| 945 | rfbPixelFormat old_format; |
| 946 | rfbBool format_changed = FALSE; |
| 947 | rfbClientIteratorPtr iterator; |
| 948 | rfbClientPtr cl; |
| 949 | |
| 950 | /* Update information in the screenInfo structure */ |
| 951 | |
| 952 | old_format = screen->serverFormat; |
| 953 | |
| 954 | if (width & 3) |
| 955 | rfbErr("WARNING: New width (%d) is not a multiple of 4.\n", width); |
| 956 | |
| 957 | screen->width = width; |
| 958 | screen->height = height; |
| 959 | screen->bitsPerPixel = screen->depth = 8*bytesPerPixel; |
| 960 | screen->paddedWidthInBytes = width*bytesPerPixel; |
| 961 | |
| 962 | rfbInitServerFormat(screen, bitsPerSample); |
| 963 | |
| 964 | if (memcmp(&screen->serverFormat, &old_format, |
| 965 | sizeof(rfbPixelFormat)) != 0) { |
| 966 | format_changed = TRUE; |
| 967 | } |
| 968 | |
| 969 | screen->frameBuffer = framebuffer; |
| 970 | |
| 971 | /* Adjust pointer position if necessary */ |
| 972 | |
| 973 | if (screen->cursorX >= width) |
| 974 | screen->cursorX = width - 1; |
| 975 | if (screen->cursorY >= height) |
| 976 | screen->cursorY = height - 1; |
| 977 | |
| 978 | /* For each client: */ |
| 979 | iterator = rfbGetClientIterator(screen); |
| 980 | while ((cl = rfbClientIteratorNext(iterator)) != NULL) { |
| 981 | |
| 982 | /* Re-install color translation tables if necessary */ |
| 983 | |
| 984 | if (format_changed) |
| 985 | screen->setTranslateFunction(cl); |
| 986 | |
| 987 | /* Mark the screen contents as changed, and schedule sending |
| 988 | NewFBSize message if supported by this client. */ |
| 989 | |
| 990 | LOCK(cl->updateMutex); |
| 991 | sraRgnDestroy(cl->modifiedRegion); |
| 992 | cl->modifiedRegion = sraRgnCreateRect(0, 0, width, height); |
| 993 | sraRgnMakeEmpty(cl->copyRegion); |
| 994 | cl->copyDX = 0; |
| 995 | cl->copyDY = 0; |
| 996 | |
| 997 | if (cl->useNewFBSize) |
| 998 | cl->newFBSizePending = TRUE; |
| 999 | |
| 1000 | TSIGNAL(cl->updateCond); |
| 1001 | UNLOCK(cl->updateMutex); |
| 1002 | } |
| 1003 | rfbReleaseClientIterator(iterator); |
| 1004 | } |
| 1005 | |
| 1006 | /* hang up on all clients and free all reserved memory */ |
| 1007 | |
| 1008 | void rfbScreenCleanup(rfbScreenInfoPtr screen) |
| 1009 | { |
| 1010 | rfbClientIteratorPtr i=rfbGetClientIterator(screen); |
| 1011 | rfbClientPtr cl,cl1=rfbClientIteratorNext(i); |
| 1012 | while(cl1) { |
| 1013 | cl=rfbClientIteratorNext(i); |
| 1014 | rfbClientConnectionGone(cl1); |
| 1015 | cl1=cl; |
| 1016 | } |
| 1017 | rfbReleaseClientIterator(i); |
| 1018 | |
| 1019 | #define FREE_IF(x) if(screen->x) free(screen->x) |
| 1020 | FREE_IF(colourMap.data.bytes); |
| 1021 | FREE_IF(underCursorBuffer); |
| 1022 | TINI_MUTEX(screen->cursorMutex); |
| 1023 | if(screen->cursor && screen->cursor->cleanup) |
| 1024 | rfbFreeCursor(screen->cursor); |
| 1025 | |
| 1026 | #ifdef LIBVNCSERVER_HAVE_LIBZ |
| 1027 | rfbZlibCleanup(screen); |
| 1028 | #ifdef LIBVNCSERVER_HAVE_LIBJPEG |
| 1029 | rfbTightCleanup(screen); |
| 1030 | #endif |
| 1031 | |
| 1032 | /* free all 'scaled' versions of this screen */ |
| 1033 | while (screen->scaledScreenNext!=NULL) |
| 1034 | { |
| 1035 | rfbScreenInfoPtr ptr; |
| 1036 | ptr = screen->scaledScreenNext; |
| 1037 | screen->scaledScreenNext = ptr->scaledScreenNext; |
| 1038 | free(ptr->frameBuffer); |
| 1039 | free(ptr); |
| 1040 | } |
| 1041 | |
| 1042 | #endif |
| 1043 | free(screen); |
| 1044 | } |
| 1045 | |
| 1046 | void rfbInitServer(rfbScreenInfoPtr screen) |
| 1047 | { |
| 1048 | #ifdef WIN32 |
| 1049 | WSADATA trash; |
| 1050 | WSAStartup(MAKEWORD(2,2),&trash); |
| 1051 | #endif |
| 1052 | rfbInitSockets(screen); |
| 1053 | rfbHttpInitSockets(screen); |
| 1054 | #ifndef __MINGW32__ |
| 1055 | if(screen->ignoreSIGPIPE) |
| 1056 | signal(SIGPIPE,SIG_IGN); |
| 1057 | #endif |
| 1058 | } |
| 1059 | |
| 1060 | void rfbShutdownServer(rfbScreenInfoPtr screen,rfbBool disconnectClients) { |
| 1061 | if(disconnectClients) { |
| 1062 | rfbClientPtr cl; |
| 1063 | rfbClientIteratorPtr iter = rfbGetClientIterator(screen); |
| 1064 | while( (cl = rfbClientIteratorNext(iter)) ) |
| 1065 | if (cl->sock > -1) |
| 1066 | /* we don't care about maxfd here, because the server goes away */ |
| 1067 | rfbCloseClient(cl); |
| 1068 | rfbReleaseClientIterator(iter); |
| 1069 | } |
| 1070 | |
| 1071 | rfbShutdownSockets(screen); |
| 1072 | rfbHttpShutdownSockets(screen); |
| 1073 | } |
| 1074 | |
| 1075 | #ifndef LIBVNCSERVER_HAVE_GETTIMEOFDAY |
| 1076 | #include <fcntl.h> |
| 1077 | #include <conio.h> |
| 1078 | #include <sys/timeb.h> |
| 1079 | |
| 1080 | void gettimeofday(struct timeval* tv,char* dummy) |
| 1081 | { |
| 1082 | SYSTEMTIME t; |
| 1083 | GetSystemTime(&t); |
| 1084 | tv->tv_sec=t.wHour*3600+t.wMinute*60+t.wSecond; |
| 1085 | tv->tv_usec=t.wMilliseconds*1000; |
| 1086 | } |
| 1087 | #endif |
| 1088 | |
| 1089 | rfbBool |
| 1090 | rfbProcessEvents(rfbScreenInfoPtr screen,long usec) |
| 1091 | { |
| 1092 | rfbClientIteratorPtr i; |
| 1093 | rfbClientPtr cl,clPrev; |
| 1094 | rfbBool result=FALSE; |
| 1095 | extern rfbClientIteratorPtr |
| 1096 | rfbGetClientIteratorWithClosed(rfbScreenInfoPtr rfbScreen); |
| 1097 | |
| 1098 | if(usec<0) |
| 1099 | usec=screen->deferUpdateTime*1000; |
| 1100 | |
| 1101 | rfbCheckFds(screen,usec); |
| 1102 | rfbHttpCheckFds(screen); |
| 1103 | |
| 1104 | i = rfbGetClientIteratorWithClosed(screen); |
| 1105 | cl=rfbClientIteratorHead(i); |
| 1106 | while(cl) { |
| 1107 | result = rfbUpdateClient(cl); |
| 1108 | clPrev=cl; |
| 1109 | cl=rfbClientIteratorNext(i); |
| 1110 | if(clPrev->sock==-1) { |
| 1111 | rfbClientConnectionGone(clPrev); |
| 1112 | result=TRUE; |
| 1113 | } |
| 1114 | } |
| 1115 | rfbReleaseClientIterator(i); |
| 1116 | |
| 1117 | return result; |
| 1118 | } |
| 1119 | |
| 1120 | rfbBool |
| 1121 | rfbUpdateClient(rfbClientPtr cl) |
| 1122 | { |
| 1123 | struct timeval tv; |
| 1124 | rfbBool result=FALSE; |
| 1125 | rfbScreenInfoPtr screen = cl->screen; |
| 1126 | |
| 1127 | if (cl->sock >= 0 && !cl->onHold && FB_UPDATE_PENDING(cl) && |
| 1128 | !sraRgnEmpty(cl->requestedRegion)) { |
| 1129 | result=TRUE; |
| 1130 | if(screen->deferUpdateTime == 0) { |
| 1131 | rfbSendFramebufferUpdate(cl,cl->modifiedRegion); |
| 1132 | } else if(cl->startDeferring.tv_usec == 0) { |
| 1133 | gettimeofday(&cl->startDeferring,NULL); |
| 1134 | if(cl->startDeferring.tv_usec == 0) |
| 1135 | cl->startDeferring.tv_usec++; |
| 1136 | } else { |
| 1137 | gettimeofday(&tv,NULL); |
| 1138 | if(tv.tv_sec < cl->startDeferring.tv_sec /* at midnight */ |
| 1139 | || ((tv.tv_sec-cl->startDeferring.tv_sec)*1000 |
| 1140 | +(tv.tv_usec-cl->startDeferring.tv_usec)/1000) |
| 1141 | > screen->deferUpdateTime) { |
| 1142 | cl->startDeferring.tv_usec = 0; |
| 1143 | rfbSendFramebufferUpdate(cl,cl->modifiedRegion); |
| 1144 | } |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | if (!cl->viewOnly && cl->lastPtrX >= 0) { |
| 1149 | if(cl->startPtrDeferring.tv_usec == 0) { |
| 1150 | gettimeofday(&cl->startPtrDeferring,NULL); |
| 1151 | if(cl->startPtrDeferring.tv_usec == 0) |
| 1152 | cl->startPtrDeferring.tv_usec++; |
| 1153 | } else { |
| 1154 | struct timeval tv; |
| 1155 | gettimeofday(&tv,NULL); |
| 1156 | if(tv.tv_sec < cl->startPtrDeferring.tv_sec /* at midnight */ |
| 1157 | || ((tv.tv_sec-cl->startPtrDeferring.tv_sec)*1000 |
| 1158 | +(tv.tv_usec-cl->startPtrDeferring.tv_usec)/1000) |
| 1159 | > cl->screen->deferPtrUpdateTime) { |
| 1160 | cl->startPtrDeferring.tv_usec = 0; |
| 1161 | cl->screen->ptrAddEvent(cl->lastPtrButtons, |
| 1162 | cl->lastPtrX, |
| 1163 | cl->lastPtrY, cl); |
| 1164 | cl->lastPtrX = -1; |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | return result; |
| 1170 | } |
| 1171 | |
| 1172 | rfbBool rfbIsActive(rfbScreenInfoPtr screenInfo) { |
| 1173 | return screenInfo->socketState!=RFB_SOCKET_SHUTDOWN || screenInfo->clientHead!=NULL; |
| 1174 | } |
| 1175 | |
| 1176 | void rfbRunEventLoop(rfbScreenInfoPtr screen, long usec, rfbBool runInBackground) |
| 1177 | { |
| 1178 | if(runInBackground) { |
| 1179 | #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD |
| 1180 | pthread_t listener_thread; |
| 1181 | |
| 1182 | screen->backgroundLoop = TRUE; |
| 1183 | |
| 1184 | pthread_create(&listener_thread, NULL, listenerRun, screen); |
| 1185 | return; |
| 1186 | #else |
| 1187 | rfbErr("Can't run in background, because I don't have PThreads!\n"); |
| 1188 | return; |
| 1189 | #endif |
| 1190 | } |
| 1191 | |
| 1192 | if(usec<0) |
| 1193 | usec=screen->deferUpdateTime*1000; |
| 1194 | |
| 1195 | while(rfbIsActive(screen)) |
| 1196 | rfbProcessEvents(screen,usec); |
| 1197 | } |