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libtdevnc/libvncserver/main.c

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/*
* This file is called main.c, because it contains most of the new functions
* for use with LibVNCServer.
*
* LibVNCServer (C) 2001 Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
* Original OSXvnc (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
*
* see GPL (latest version) for full details
*/
#include <rfb/rfb.h>
#include <rfb/rfbregion.h>
#include <stdarg.h>
#include <errno.h>
#ifndef false
#define false 0
#define true -1
#endif
#ifdef LIBVNCSERVER_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifndef WIN32
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#endif
#include <signal.h>
#include <time.h>
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
MUTEX(logMutex);
#endif
int rfbEnableLogging=1;
#ifdef LIBVNCSERVER_WORDS_BIGENDIAN
char rfbEndianTest = 0;
#else
char rfbEndianTest = -1;
#endif
/* from rfbserver.c */
void rfbIncrClientRef(rfbClientPtr cl);
void rfbDecrClientRef(rfbClientPtr cl);
void rfbLogEnable(int enabled) {
rfbEnableLogging=enabled;
}
/*
* rfbLog prints a time-stamped message to the log file (stderr).
*/
void
rfbDefaultLog(const char *format, ...)
{
va_list args;
char buf[256];
time_t log_clock;
if(!rfbEnableLogging)
return;
LOCK(logMutex);
va_start(args, format);
time(&log_clock);
strftime(buf, 255, "%d/%m/%Y %X ", localtime(&log_clock));
fprintf(stderr,buf);
vfprintf(stderr, format, args);
fflush(stderr);
va_end(args);
UNLOCK(logMutex);
}
rfbLogProc rfbLog=rfbDefaultLog;
rfbLogProc rfbErr=rfbDefaultLog;
void rfbLogPerror(const char *str)
{
rfbErr("%s: %s\n", str, strerror(errno));
}
void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator))) {
LOCK(cl->updateMutex);
if(cl->useCopyRect) {
sraRegionPtr modifiedRegionBackup;
if(!sraRgnEmpty(cl->copyRegion)) {
if(cl->copyDX!=dx || cl->copyDY!=dy) {
/* if a copyRegion was not yet executed, treat it as a
* modifiedRegion. The idea: in this case it could be
* source of the new copyRect or modified anyway. */
sraRgnOr(cl->modifiedRegion,cl->copyRegion);
sraRgnMakeEmpty(cl->copyRegion);
} else {
/* we have to set the intersection of the source of the copy
* and the old copy to modified. */
modifiedRegionBackup=sraRgnCreateRgn(copyRegion);
sraRgnOffset(modifiedRegionBackup,-dx,-dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
}
}
sraRgnOr(cl->copyRegion,copyRegion);
cl->copyDX = dx;
cl->copyDY = dy;
/* if there were modified regions, which are now copied,
* mark them as modified, because the source of these can be overlapped
* either by new modified or now copied regions. */
modifiedRegionBackup=sraRgnCreateRgn(cl->modifiedRegion);
sraRgnOffset(modifiedRegionBackup,dx,dy);
sraRgnAnd(modifiedRegionBackup,cl->copyRegion);
sraRgnOr(cl->modifiedRegion,modifiedRegionBackup);
sraRgnDestroy(modifiedRegionBackup);
} else {
sraRgnOr(cl->modifiedRegion,copyRegion);
}
TSIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
void rfbDoCopyRegion(rfbScreenInfoPtr screen,sraRegionPtr copyRegion,int dx,int dy)
{
sraRectangleIterator* i;
sraRect rect;
int j,widthInBytes,bpp=screen->serverFormat.bitsPerPixel/8,
rowstride=screen->paddedWidthInBytes;
char *in,*out;
/* copy it, really */
i = sraRgnGetReverseIterator(copyRegion,dx<0,dy<0);
while(sraRgnIteratorNext(i,&rect)) {
widthInBytes = (rect.x2-rect.x1)*bpp;
out = screen->frameBuffer+rect.x1*bpp+rect.y1*rowstride;
in = screen->frameBuffer+(rect.x1-dx)*bpp+(rect.y1-dy)*rowstride;
if(dy<0)
for(j=rect.y1;j<rect.y2;j++,out+=rowstride,in+=rowstride)
memmove(out,in,widthInBytes);
else {
out += rowstride*(rect.y2-rect.y1-1);
in += rowstride*(rect.y2-rect.y1-1);
for(j=rect.y2-1;j>=rect.y1;j--,out-=rowstride,in-=rowstride)
memmove(out,in,widthInBytes);
}
}
rfbScheduleCopyRegion(screen,copyRegion,dx,dy);
}
void rfbDoCopyRect(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2,int dx,int dy)
{
sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2);
rfbDoCopyRegion(screen,region,dx,dy);
sraRgnDestroy(region);
}
void rfbScheduleCopyRect(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2,int dx,int dy)
{
sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2);
rfbScheduleCopyRegion(screen,region,dx,dy);
sraRgnDestroy(region);
}
void rfbMarkRegionAsModified(rfbScreenInfoPtr screen,sraRegionPtr modRegion)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
iterator=rfbGetClientIterator(screen);
while((cl=rfbClientIteratorNext(iterator))) {
LOCK(cl->updateMutex);
sraRgnOr(cl->modifiedRegion,modRegion);
TSIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
void rfbMarkRectAsModified(rfbScreenInfoPtr screen,int x1,int y1,int x2,int y2)
{
sraRegionPtr region;
int i;
if(x1>x2) { i=x1; x1=x2; x2=i; }
if(x1<0) x1=0;
if(x2>=screen->width) x2=screen->width-1;
if(x1==x2) return;
if(y1>y2) { i=y1; y1=y2; y2=i; }
if(y1<0) y1=0;
if(y2>=screen->height) y2=screen->height-1;
if(y1==y2) return;
region = sraRgnCreateRect(x1,y1,x2,y2);
rfbMarkRegionAsModified(screen,region);
sraRgnDestroy(region);
}
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
static void *
clientOutput(void *data)
{
rfbClientPtr cl = (rfbClientPtr)data;
rfbBool haveUpdate;
sraRegion* updateRegion;
while (1) {
haveUpdate = false;
while (!haveUpdate) {
if (cl->sock == -1) {
/* Client has disconnected. */
return NULL;
}
LOCK(cl->updateMutex);
haveUpdate = FB_UPDATE_PENDING(cl);
if(!haveUpdate) {
updateRegion = sraRgnCreateRgn(cl->modifiedRegion);
haveUpdate = sraRgnAnd(updateRegion,cl->requestedRegion);
sraRgnDestroy(updateRegion);
}
UNLOCK(cl->updateMutex);
if (!haveUpdate) {
WAIT(cl->updateCond, cl->updateMutex);
UNLOCK(cl->updateMutex); /* we really needn't lock now. */
}
}
/* OK, now, to save bandwidth, wait a little while for more
updates to come along. */
usleep(cl->screen->deferUpdateTime * 1000);
/* Now, get the region we're going to update, and remove
it from cl->modifiedRegion _before_ we send the update.
That way, if anything that overlaps the region we're sending
is updated, we'll be sure to do another update later. */
LOCK(cl->updateMutex);
updateRegion = sraRgnCreateRgn(cl->modifiedRegion);
UNLOCK(cl->updateMutex);
/* Now actually send the update. */
rfbIncrClientRef(cl);
rfbSendFramebufferUpdate(cl, updateRegion);
rfbDecrClientRef(cl);
sraRgnDestroy(updateRegion);
}
return NULL;
}
static void *
clientInput(void *data)
{
rfbClientPtr cl = (rfbClientPtr)data;
pthread_t output_thread;
pthread_create(&output_thread, NULL, clientOutput, (void *)cl);
while (1) {
rfbProcessClientMessage(cl);
if (cl->sock == -1) {
/* Client has disconnected. */
break;
}
}
/* Get rid of the output thread. */
LOCK(cl->updateMutex);
TSIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
IF_PTHREADS(pthread_join(output_thread, NULL));
rfbClientConnectionGone(cl);
return NULL;
}
static void*
listenerRun(void *data)
{
rfbScreenInfoPtr screen=(rfbScreenInfoPtr)data;
int client_fd;
struct sockaddr_in peer;
rfbClientPtr cl;
size_t len;
len = sizeof(peer);
/* TODO: this thread wont die by restarting the server */
while ((client_fd = accept(screen->listenSock,
(struct sockaddr*)&peer, &len)) >= 0) {
cl = rfbNewClient(screen,client_fd);
len = sizeof(peer);
if (cl && !cl->onHold )
rfbStartOnHoldClient(cl);
}
return(NULL);
}
void
rfbStartOnHoldClient(rfbClientPtr cl)
{
pthread_create(&cl->client_thread, NULL, clientInput, (void *)cl);
}
#else
void
rfbStartOnHoldClient(rfbClientPtr cl)
{
cl->onHold = FALSE;
}
#endif
void
rfbRefuseOnHoldClient(rfbClientPtr cl)
{
rfbCloseClient(cl);
rfbClientConnectionGone(cl);
}
static void
rfbDefaultKbdAddEvent(rfbBool down, rfbKeySym keySym, rfbClientPtr cl)
{
}
void
rfbDefaultPtrAddEvent(int buttonMask, int x, int y, rfbClientPtr cl)
{
rfbClientIteratorPtr iterator;
rfbClientPtr other_client;
rfbScreenInfoPtr s = cl->screen;
rfbCursorPtr c = s->cursor;
if (x != s->cursorX || y != s->cursorY) {
LOCK(s->cursorMutex);
s->cursorX = x;
s->cursorY = y;
UNLOCK(s->cursorMutex);
/* The cursor was moved by this client, so don't send CursorPos. */
if (cl->enableCursorPosUpdates)
cl->cursorWasMoved = FALSE;
/* But inform all remaining clients about this cursor movement. */
iterator = rfbGetClientIterator(s);
while ((other_client = rfbClientIteratorNext(iterator)) != NULL) {
if (other_client != cl && other_client->enableCursorPosUpdates) {
other_client->cursorWasMoved = TRUE;
}
}
rfbReleaseClientIterator(iterator);
}
}
void rfbDefaultSetXCutText(char* text, int len, rfbClientPtr cl)
{
}
/* TODO: add a nice VNC or RFB cursor */
#if defined(WIN32) || defined(sparc) || !defined(NO_STRICT_ANSI)
static rfbCursor myCursor =
{
FALSE, FALSE, FALSE, FALSE,
(unsigned char*)"\000\102\044\030\044\102\000",
(unsigned char*)"\347\347\176\074\176\347\347",
8, 7, 3, 3,
0, 0, 0,
0xffff, 0xffff, 0xffff,
0
};
#else
static rfbCursor myCursor =
{
cleanup: FALSE,
cleanupSource: FALSE,
cleanupMask: FALSE,
cleanupRichSource: FALSE,
source: "\000\102\044\030\044\102\000",
mask: "\347\347\176\074\176\347\347",
width: 8, height: 7, xhot: 3, yhot: 3,
foreRed: 0, foreGreen: 0, foreBlue: 0,
backRed: 0xffff, backGreen: 0xffff, backBlue: 0xffff,
richSource: 0
};
#endif
rfbCursorPtr rfbDefaultGetCursorPtr(rfbClientPtr cl)
{
return(cl->screen->cursor);
}
/* response is cl->authChallenge vncEncrypted with passwd */
rfbBool rfbDefaultPasswordCheck(rfbClientPtr cl,const char* response,int len)
{
int i;
char *passwd=rfbDecryptPasswdFromFile(cl->screen->authPasswdData);
if(!passwd) {
rfbErr("Couldn't read password file: %s\n",cl->screen->authPasswdData);
return(FALSE);
}
rfbEncryptBytes(cl->authChallenge, passwd);
/* Lose the password from memory */
for (i = strlen(passwd); i >= 0; i--) {
passwd[i] = '\0';
}
free(passwd);
if (memcmp(cl->authChallenge, response, len) != 0) {
rfbErr("authProcessClientMessage: authentication failed from %s\n",
cl->host);
return(FALSE);
}
return(TRUE);
}
/* for this method, authPasswdData is really a pointer to an array
of char*'s, where the last pointer is 0. */
rfbBool rfbCheckPasswordByList(rfbClientPtr cl,const char* response,int len)
{
char **passwds;
int i=0;
for(passwds=(char**)cl->screen->authPasswdData;*passwds;passwds++,i++) {
uint8_t auth_tmp[CHALLENGESIZE];
memcpy((char *)auth_tmp, (char *)cl->authChallenge, CHALLENGESIZE);
rfbEncryptBytes(auth_tmp, *passwds);
if (memcmp(auth_tmp, response, len) == 0) {
if(i>=cl->screen->authPasswdFirstViewOnly)
cl->viewOnly=TRUE;
return(TRUE);
}
}
rfbErr("authProcessClientMessage: authentication failed from %s\n",
cl->host);
return(FALSE);
}
void rfbDoNothingWithClient(rfbClientPtr cl)
{
}
enum rfbNewClientAction rfbDefaultNewClientHook(rfbClientPtr cl)
{
return RFB_CLIENT_ACCEPT;
}
rfbBool rfbDefaultProcessCustomClientMessage(rfbClientPtr cl,uint8_t type)
{
return FALSE;
}
/*
* Update server's pixel format in screenInfo structure. This
* function is called from rfbGetScreen() and rfbNewFramebuffer().
*/
static void rfbInitServerFormat(rfbScreenInfoPtr screen, int bitsPerSample)
{
rfbPixelFormat* format=&screen->serverFormat;
format->bitsPerPixel = screen->bitsPerPixel;
format->depth = screen->depth;
format->bigEndian = rfbEndianTest?FALSE:TRUE;
format->trueColour = TRUE;
screen->colourMap.count = 0;
screen->colourMap.is16 = 0;
screen->colourMap.data.bytes = NULL;
if (format->bitsPerPixel == 8) {
format->redMax = 7;
format->greenMax = 7;
format->blueMax = 3;
format->redShift = 0;
format->greenShift = 3;
format->blueShift = 6;
} else {
format->redMax = (1 << bitsPerSample) - 1;
format->greenMax = (1 << bitsPerSample) - 1;
format->blueMax = (1 << bitsPerSample) - 1;
if(rfbEndianTest) {
format->redShift = 0;
format->greenShift = bitsPerSample;
format->blueShift = bitsPerSample * 2;
} else {
if(format->bitsPerPixel==8*3) {
format->redShift = bitsPerSample*2;
format->greenShift = bitsPerSample*1;
format->blueShift = 0;
} else {
format->redShift = bitsPerSample*3;
format->greenShift = bitsPerSample*2;
format->blueShift = bitsPerSample;
}
}
}
}
rfbScreenInfoPtr rfbGetScreen(int* argc,char** argv,
int width,int height,int bitsPerSample,int samplesPerPixel,
int bytesPerPixel)
{
rfbScreenInfoPtr screen=malloc(sizeof(rfbScreenInfo));
INIT_MUTEX(logMutex);
if(width&3)
rfbErr("WARNING: Width (%d) is not a multiple of 4. VncViewer has problems with that.\n",width);
screen->autoPort=FALSE;
screen->clientHead=0;
screen->pointerClient=0;
screen->port=5900;
screen->socketState=RFB_SOCKET_INIT;
screen->inetdInitDone = FALSE;
screen->inetdSock=-1;
screen->udpSock=-1;
screen->udpSockConnected=FALSE;
screen->udpPort=0;
screen->udpClient=0;
screen->maxFd=0;
screen->listenSock=-1;
screen->httpInitDone=FALSE;
screen->httpEnableProxyConnect=FALSE;
screen->httpPort=0;
screen->httpDir=NULL;
screen->httpListenSock=-1;
screen->httpSock=-1;
screen->desktopName = "LibVNCServer";
screen->alwaysShared = FALSE;
screen->neverShared = FALSE;
screen->dontDisconnect = FALSE;
screen->authPasswdData = 0;
screen->authPasswdFirstViewOnly = 1;
screen->width = width;
screen->height = height;
screen->bitsPerPixel = screen->depth = 8*bytesPerPixel;
screen->passwordCheck = rfbDefaultPasswordCheck;
screen->ignoreSIGPIPE = TRUE;
/* disable progressive updating per default */
screen->progressiveSliceHeight = 0;
screen->listenInterface = htonl(INADDR_ANY);
if(!rfbProcessArguments(screen,argc,argv)) {
free(screen);
return 0;
}
#ifdef WIN32
{
DWORD dummy=255;
GetComputerName(screen->thisHost,&dummy);
}
#else
gethostname(screen->thisHost, 255);
#endif
screen->paddedWidthInBytes = width*bytesPerPixel;
/* format */
rfbInitServerFormat(screen, bitsPerSample);
/* cursor */
screen->cursorX=screen->cursorY=screen->underCursorBufferLen=0;
screen->underCursorBuffer=NULL;
screen->dontConvertRichCursorToXCursor = FALSE;
screen->cursor = &myCursor;
INIT_MUTEX(screen->cursorMutex);
IF_PTHREADS(screen->backgroundLoop = FALSE);
screen->deferUpdateTime=5;
screen->maxRectsPerUpdate=50;
/* proc's and hook's */
screen->kbdAddEvent = rfbDefaultKbdAddEvent;
screen->kbdReleaseAllKeys = rfbDoNothingWithClient;
screen->ptrAddEvent = rfbDefaultPtrAddEvent;
screen->setXCutText = rfbDefaultSetXCutText;
screen->getCursorPtr = rfbDefaultGetCursorPtr;
screen->setTranslateFunction = rfbSetTranslateFunction;
screen->newClientHook = rfbDefaultNewClientHook;
screen->displayHook = 0;
screen->processCustomClientMessage = rfbDefaultProcessCustomClientMessage;
/* initialize client list and iterator mutex */
rfbClientListInit(screen);
return(screen);
}
/*
* Switch to another framebuffer (maybe of different size and color
* format). Clients supporting NewFBSize pseudo-encoding will change
* their local framebuffer dimensions if necessary.
* NOTE: Rich cursor data should be converted to new pixel format by
* the caller.
*/
void rfbNewFramebuffer(rfbScreenInfoPtr screen, char *framebuffer,
int width, int height,
int bitsPerSample, int samplesPerPixel,
int bytesPerPixel)
{
rfbPixelFormat old_format;
rfbBool format_changed = FALSE;
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
/* Update information in the screenInfo structure */
old_format = screen->serverFormat;
if (width & 3)
rfbErr("WARNING: New width (%d) is not a multiple of 4.\n", width);
screen->width = width;
screen->height = height;
screen->bitsPerPixel = screen->depth = 8*bytesPerPixel;
screen->paddedWidthInBytes = width*bytesPerPixel;
rfbInitServerFormat(screen, bitsPerSample);
if (memcmp(&screen->serverFormat, &old_format,
sizeof(rfbPixelFormat)) != 0) {
format_changed = TRUE;
}
screen->frameBuffer = framebuffer;
/* Adjust pointer position if necessary */
if (screen->cursorX >= width)
screen->cursorX = width - 1;
if (screen->cursorY >= height)
screen->cursorY = height - 1;
/* For each client: */
iterator = rfbGetClientIterator(screen);
while ((cl = rfbClientIteratorNext(iterator)) != NULL) {
/* Re-install color translation tables if necessary */
if (format_changed)
screen->setTranslateFunction(cl);
/* Mark the screen contents as changed, and schedule sending
NewFBSize message if supported by this client. */
LOCK(cl->updateMutex);
sraRgnDestroy(cl->modifiedRegion);
cl->modifiedRegion = sraRgnCreateRect(0, 0, width, height);
sraRgnMakeEmpty(cl->copyRegion);
cl->copyDX = 0;
cl->copyDY = 0;
if (cl->useNewFBSize)
cl->newFBSizePending = TRUE;
TSIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
#ifdef LIBVNCSERVER_HAVE_LIBJPEG
extern void TightCleanup();
#endif
/* hang up on all clients and free all reserved memory */
void rfbScreenCleanup(rfbScreenInfoPtr screen)
{
rfbClientIteratorPtr i=rfbGetClientIterator(screen);
rfbClientPtr cl,cl1=rfbClientIteratorNext(i);
while(cl1) {
cl=rfbClientIteratorNext(i);
rfbClientConnectionGone(cl1);
cl1=cl;
}
rfbReleaseClientIterator(i);
#define FREE_IF(x) if(screen->x) free(screen->x)
FREE_IF(colourMap.data.bytes);
FREE_IF(underCursorBuffer);
TINI_MUTEX(screen->cursorMutex);
if(screen->cursor && screen->cursor->cleanup)
rfbFreeCursor(screen->cursor);
free(screen);
#ifdef LIBVNCSERVER_HAVE_LIBJPEG
rfbTightCleanup();
#endif
}
void rfbInitServer(rfbScreenInfoPtr screen)
{
#ifdef WIN32
WSADATA trash;
int i=WSAStartup(MAKEWORD(2,2),&trash);
#endif
rfbInitSockets(screen);
rfbHttpInitSockets(screen);
#ifndef __MINGW32__
if(screen->ignoreSIGPIPE)
signal(SIGPIPE,SIG_IGN);
#endif
}
void rfbShutdownServer(rfbScreenInfoPtr screen,rfbBool disconnectClients) {
if(disconnectClients) {
rfbClientPtr cl;
rfbClientIteratorPtr iter = rfbGetClientIterator(screen);
while( (cl = rfbClientIteratorNext(iter)) )
if (cl->sock > -1)
/* we don't care about maxfd here, because the server goes away */
rfbCloseClient(cl);
}
rfbShutdownSockets(screen);
rfbHttpShutdownSockets(screen);
}
#ifndef LIBVNCSERVER_HAVE_GETTIMEOFDAY
#include <fcntl.h>
#include <conio.h>
#include <sys/timeb.h>
void gettimeofday(struct timeval* tv,char* dummy)
{
SYSTEMTIME t;
GetSystemTime(&t);
tv->tv_sec=t.wHour*3600+t.wMinute*60+t.wSecond;
tv->tv_usec=t.wMilliseconds*1000;
}
#endif
/* defined in rfbserver.c, but kind of "private" */
rfbClientPtr rfbClientIteratorHead(rfbClientIteratorPtr i);
rfbBool
rfbProcessEvents(rfbScreenInfoPtr screen,long usec)
{
rfbClientIteratorPtr i;
rfbClientPtr cl,clPrev;
struct timeval tv;
rfbBool result=FALSE;
if(usec<0)
usec=screen->deferUpdateTime*1000;
rfbCheckFds(screen,usec);
rfbHttpCheckFds(screen);
#ifdef CORBA
corbaCheckFds(screen);
#endif
i = rfbGetClientIterator(screen);
cl=rfbClientIteratorHead(i);
while(cl) {
if (cl->sock >= 0 && !cl->onHold && FB_UPDATE_PENDING(cl) &&
!sraRgnEmpty(cl->requestedRegion)) {
result=TRUE;
if(screen->deferUpdateTime == 0) {
rfbSendFramebufferUpdate(cl,cl->modifiedRegion);
} else if(cl->startDeferring.tv_usec == 0) {
gettimeofday(&cl->startDeferring,NULL);
if(cl->startDeferring.tv_usec == 0)
cl->startDeferring.tv_usec++;
} else {
gettimeofday(&tv,NULL);
if(tv.tv_sec < cl->startDeferring.tv_sec /* at midnight */
|| ((tv.tv_sec-cl->startDeferring.tv_sec)*1000
+(tv.tv_usec-cl->startDeferring.tv_usec)/1000)
> screen->deferUpdateTime) {
cl->startDeferring.tv_usec = 0;
rfbSendFramebufferUpdate(cl,cl->modifiedRegion);
}
}
}
clPrev=cl;
cl=rfbClientIteratorNext(i);
if(clPrev->sock==-1) {
rfbClientConnectionGone(clPrev);
result=TRUE;
}
}
rfbReleaseClientIterator(i);
return result;
}
rfbBool rfbIsActive(rfbScreenInfoPtr screenInfo) {
return screenInfo->socketState!=RFB_SOCKET_SHUTDOWN || screenInfo->clientHead!=NULL;
}
void rfbRunEventLoop(rfbScreenInfoPtr screen, long usec, rfbBool runInBackground)
{
if(runInBackground) {
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
pthread_t listener_thread;
screen->backgroundLoop = TRUE;
pthread_create(&listener_thread, NULL, listenerRun, screen);
return;
#else
rfbErr("Can't run in background, because I don't have PThreads!\n");
return;
#endif
}
if(usec<0)
usec=screen->deferUpdateTime*1000;
while(rfbIsActive(screen))
rfbProcessEvents(screen,usec);
}
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