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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
*/
#ifdef __STRICT_ANSI__
#define _BSD_SOURCE
#endif
#include <rfb/rfb.h>
#include <rfb/rfbregion.h>
#include "private.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>
static int extMutex_initialized = 0;
static int logMutex_initialized = 0;
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
static MUTEX(logMutex);
static MUTEX(extMutex);
#endif
static int rfbEnableLogging=1;
#ifdef LIBVNCSERVER_WORDS_BIGENDIAN
char rfbEndianTest = (1==0);
#else
char rfbEndianTest = (1==1);
#endif
/*
* Protocol extensions
*/
static rfbProtocolExtension* rfbExtensionHead = NULL;
/*
* This method registers a list of new extensions.
* It avoids same extension getting registered multiple times.
* The order is not preserved if multiple extensions are
* registered at one-go.
*/
void
rfbRegisterProtocolExtension(rfbProtocolExtension* extension)
{
rfbProtocolExtension *head = rfbExtensionHead, *next = NULL;
if(extension == NULL)
return;
next = extension->next;
if (! extMutex_initialized) {
INIT_MUTEX(extMutex);
extMutex_initialized = 1;
}
LOCK(extMutex);
while(head != NULL) {
if(head == extension) {
UNLOCK(extMutex);
rfbRegisterProtocolExtension(next);
return;
}
head = head->next;
}
extension->next = rfbExtensionHead;
rfbExtensionHead = extension;
UNLOCK(extMutex);
rfbRegisterProtocolExtension(next);
}
/*
* This method unregisters a list of extensions.
* These extensions won't be available for any new
* client connection.
*/
void
rfbUnregisterProtocolExtension(rfbProtocolExtension* extension)
{
rfbProtocolExtension *cur = NULL, *pre = NULL;
if(extension == NULL)
return;
if (! extMutex_initialized) {
INIT_MUTEX(extMutex);
extMutex_initialized = 1;
}
LOCK(extMutex);
if(rfbExtensionHead == extension) {
rfbExtensionHead = rfbExtensionHead->next;
UNLOCK(extMutex);
rfbUnregisterProtocolExtension(extension->next);
return;
}
cur = pre = rfbExtensionHead;
while(cur) {
if(cur == extension) {
pre->next = cur->next;
break;
}
pre = cur;
cur = cur->next;
}
UNLOCK(extMutex);
rfbUnregisterProtocolExtension(extension->next);
}
rfbProtocolExtension* rfbGetExtensionIterator()
{
if (! extMutex_initialized) {
INIT_MUTEX(extMutex);
extMutex_initialized = 1;
}
LOCK(extMutex);
return rfbExtensionHead;
}
void rfbReleaseExtensionIterator()
{
UNLOCK(extMutex);
}
rfbBool rfbEnableExtension(rfbClientPtr cl, rfbProtocolExtension* extension,
void* data)
{
rfbExtensionData* extData;
/* make sure extension is not yet enabled. */
for(extData = cl->extensions; extData; extData = extData->next)
if(extData->extension == extension)
return FALSE;
extData = calloc(sizeof(rfbExtensionData),1);
extData->extension = extension;
extData->data = data;
extData->next = cl->extensions;
cl->extensions = extData;
return TRUE;
}
rfbBool rfbDisableExtension(rfbClientPtr cl, rfbProtocolExtension* extension)
{
rfbExtensionData* extData;
rfbExtensionData* prevData = NULL;
for(extData = cl->extensions; extData; extData = extData->next) {
if(extData->extension == extension) {
if(extData->data)
free(extData->data);
if(prevData == NULL)
cl->extensions = extData->next;
else
prevData->next = extData->next;
return TRUE;
}
prevData = extData;
}
return FALSE;
}
void* rfbGetExtensionClientData(rfbClientPtr cl, rfbProtocolExtension* extension)
{
rfbExtensionData* data = cl->extensions;
while(data && data->extension != extension)
data = data->next;
if(data == NULL) {
rfbLog("Extension is not enabled !\n");
/* rfbCloseClient(cl); */
return NULL;
}
return data->data;
}
/*
* Logging
*/
void rfbLogEnable(int enabled) {
rfbEnableLogging=enabled;
}
/*
* rfbLog prints a time-stamped message to the log file (stderr).
*/
static void
rfbDefaultLog(const char *format, ...)
{
va_list args;
char buf[256];
time_t log_clock;
if(!rfbEnableLogging)
return;
if (! logMutex_initialized) {
INIT_MUTEX(logMutex);
logMutex_initialized = 1;
}
LOCK(logMutex);
va_start(args, format);
time(&log_clock);
strftime(buf, 255, "%d/%m/%Y %X ", localtime(&log_clock));
fprintf(stderr, "%s", buf);
vfprintf(stderr, format, args);
fflush(stderr);
va_end(args);
UNLOCK(logMutex);
}
rfbLogProc rfbLog=rfbDefaultLog;
rfbLogProc rfbErr=rfbDefaultLog;
void rfbLogPerror(const char *str)
{
#ifdef WIN32
wchar_t *s = NULL;
FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&s, 0, NULL);
rfbErr("%s: %S\n", str, s);
LocalFree(s);
#else
rfbErr("%s: %s\n", str, strerror(errno));
#endif
}
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);
if(!cl->enableCursorShapeUpdates) {
/*
* n.b. (dx, dy) is the vector pointing in the direction the
* copyrect displacement will take place. copyRegion is the
* destination rectangle (say), not the source rectangle.
*/
sraRegionPtr cursorRegion;
int x = cl->cursorX - cl->screen->cursor->xhot;
int y = cl->cursorY - cl->screen->cursor->yhot;
int w = cl->screen->cursor->width;
int h = cl->screen->cursor->height;
cursorRegion = sraRgnCreateRect(x, y, x + w, y + h);
sraRgnAnd(cursorRegion, cl->copyRegion);
if(!sraRgnEmpty(cursorRegion)) {
/*
* current cursor rect overlaps with the copy region *dest*,
* mark it as modified since we won't copy-rect stuff to it.
*/
sraRgnOr(cl->modifiedRegion, cursorRegion);
}
sraRgnDestroy(cursorRegion);
cursorRegion = sraRgnCreateRect(x, y, x + w, y + h);
/* displace it to check for overlap with copy region source: */
sraRgnOffset(cursorRegion, dx, dy);
sraRgnAnd(cursorRegion, cl->copyRegion);
if(!sraRgnEmpty(cursorRegion)) {
/*
* current cursor rect overlaps with the copy region *source*,
* mark the *displaced* cursorRegion as modified since we
* won't copyrect stuff to it.
*/
sraRgnOr(cl->modifiedRegion, cursorRegion);
}
sraRgnDestroy(cursorRegion);
}
} 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);
}
}
sraRgnReleaseIterator(i);
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 rfbScaledScreenUpdate(rfbScreenInfoPtr screen, int x1, int y1, int x2, int y2);
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;
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;
if(y1==y2) return;
/* update scaled copies for this rectangle */
rfbScaledScreenUpdate(screen,x1,y1,x2,y2);
region = sraRgnCreateRect(x1,y1,x2,y2);
rfbMarkRegionAsModified(screen,region);
sraRgnDestroy(region);
}
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
#include <unistd.h>
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;
}
if (cl->state != RFB_NORMAL || cl->onHold) {
/* just sleep until things get normal */
usleep(cl->screen->deferUpdateTime * 1000);
continue;
}
LOCK(cl->updateMutex);
if (sraRgnEmpty(cl->requestedRegion)) {
; /* always require a FB Update Request (otherwise can crash.) */
} else {
haveUpdate = FB_UPDATE_PENDING(cl);
if(!haveUpdate) {
updateRegion = sraRgnCreateRgn(cl->modifiedRegion);
haveUpdate = sraRgnAnd(updateRegion,cl->requestedRegion);
sraRgnDestroy(updateRegion);
}
}
if (!haveUpdate) {
WAIT(cl->updateCond, cl->updateMutex);
}
UNLOCK(cl->updateMutex);
}
/* 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);
LOCK(cl->sendMutex);
rfbSendFramebufferUpdate(cl, updateRegion);
UNLOCK(cl->sendMutex);
rfbDecrClientRef(cl);
sraRgnDestroy(updateRegion);
}
/* Not reached. */
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) {
fd_set rfds, wfds, efds;
struct timeval tv;
int n;
if (cl->sock == -1) {
/* Client has disconnected. */
break;
}
FD_ZERO(&rfds);
FD_SET(cl->sock, &rfds);
FD_ZERO(&efds);
FD_SET(cl->sock, &efds);
/* Are we transferring a file in the background? */
FD_ZERO(&wfds);
if ((cl->fileTransfer.fd!=-1) && (cl->fileTransfer.sending==1))
FD_SET(cl->sock, &wfds);
tv.tv_sec = 60; /* 1 minute */
tv.tv_usec = 0;
n = select(cl->sock + 1, &rfds, &wfds, &efds, &tv);
if (n < 0) {
rfbLogPerror("ReadExact: select");
break;
}
if (n == 0) /* timeout */
{
rfbSendFileTransferChunk(cl);
continue;
}
/* We have some space on the transmit queue, send some data */
if (FD_ISSET(cl->sock, &wfds))
rfbSendFileTransferChunk(cl);
if (FD_ISSET(cl->sock, &rfds) || FD_ISSET(cl->sock, &efds))
{
#ifdef LIBVNCSERVER_WITH_WEBSOCKETS
do {
rfbProcessClientMessage(cl);
} while (webSocketsHasDataInBuffer(cl));
#else
rfbProcessClientMessage(cl);
#endif
}
}
/* 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_storage peer;
rfbClientPtr cl = NULL;
socklen_t len;
fd_set listen_fds; /* temp file descriptor list for select() */
/* TODO: this thread won't die by restarting the server */
/* TODO: HTTP is not handled */
while (1) {
client_fd = -1;
FD_ZERO(&listen_fds);
if(screen->listenSock >= 0)
FD_SET(screen->listenSock, &listen_fds);
if(screen->listen6Sock >= 0)
FD_SET(screen->listen6Sock, &listen_fds);
if (select(screen->maxFd+1, &listen_fds, NULL, NULL, NULL) == -1) {
rfbLogPerror("listenerRun: error in select");
return NULL;
}
/* there is something on the listening sockets, handle new connections */
len = sizeof (peer);
if (FD_ISSET(screen->listenSock, &listen_fds))
client_fd = accept(screen->listenSock, (struct sockaddr*)&peer, &len);
else if (FD_ISSET(screen->listen6Sock, &listen_fds))
client_fd = accept(screen->listen6Sock, (struct sockaddr*)&peer, &len);
if(client_fd >= 0)
cl = rfbNewClient(screen,client_fd);
if (cl && !cl->onHold )
rfbStartOnHoldClient(cl);
}
return(NULL);
}
#endif
void
rfbStartOnHoldClient(rfbClientPtr cl)
{
cl->onHold = FALSE;
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
if(cl->screen->backgroundLoop)
pthread_create(&cl->client_thread, NULL, clientInput, (void *)cl);
#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;
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);
}
}
static 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,
NULL
};
#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: NULL
};
#endif
static rfbCursorPtr rfbDefaultGetCursorPtr(rfbClientPtr cl)
{
return(cl->screen->cursor);
}
/* response is cl->authChallenge vncEncrypted with passwd */
static 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)
{
}
static enum rfbNewClientAction rfbDefaultNewClientHook(rfbClientPtr cl)
{
return RFB_CLIENT_ACCEPT;
}
/*
* 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=calloc(sizeof(rfbScreenInfo),1);
if (! logMutex_initialized) {
INIT_MUTEX(logMutex);
logMutex_initialized = 1;
}
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=NULL;
screen->pointerClient=NULL;
screen->port=5900;
screen->ipv6port=5900;
screen->socketState=RFB_SOCKET_INIT;
screen->inetdInitDone = FALSE;
screen->inetdSock=-1;
screen->udpSock=-1;
screen->udpSockConnected=FALSE;
screen->udpPort=0;
screen->udpClient=NULL;
screen->maxFd=0;
screen->listenSock=-1;
screen->listen6Sock=-1;
screen->httpInitDone=FALSE;
screen->httpEnableProxyConnect=FALSE;
screen->httpPort=0;
screen->http6Port=0;
screen->httpDir=NULL;
screen->httpListenSock=-1;
screen->httpListen6Sock=-1;
screen->httpSock=-1;
screen->desktopName = "LibVNCServer";
screen->alwaysShared = FALSE;
screen->neverShared = FALSE;
screen->dontDisconnect = FALSE;
screen->authPasswdData = NULL;
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);
screen->deferUpdateTime=5;
screen->maxRectsPerUpdate=50;
screen->handleEventsEagerly = FALSE;
screen->protocolMajorVersion = rfbProtocolMajorVersion;
screen->protocolMinorVersion = rfbProtocolMinorVersion;
screen->permitFileTransfer = FALSE;
if(!rfbProcessArguments(screen,argc,argv)) {
free(screen);
return NULL;
}
#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);
/* 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 = NULL;
screen->displayFinishedHook = NULL;
screen->getKeyboardLedStateHook = NULL;
screen->xvpHook = NULL;
/* 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);
}
/* 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);
#ifdef LIBVNCSERVER_HAVE_LIBZ
rfbZlibCleanup(screen);
#ifdef LIBVNCSERVER_HAVE_LIBJPEG
rfbTightCleanup(screen);
#endif
/* free all 'scaled' versions of this screen */
while (screen->scaledScreenNext!=NULL)
{
rfbScreenInfoPtr ptr;
ptr = screen->scaledScreenNext;
screen->scaledScreenNext = ptr->scaledScreenNext;
free(ptr->frameBuffer);
free(ptr);
}
#endif
free(screen);
}
void rfbInitServer(rfbScreenInfoPtr screen)
{
#ifdef WIN32
WSADATA trash;
static rfbBool WSAinitted=FALSE;
if(!WSAinitted) {
int i=WSAStartup(MAKEWORD(2,0),&trash);
if(i!=0) {
rfbErr("Couldn't init Windows Sockets\n");
return 0;
}
WSAinitted=TRUE;
}
#endif
rfbInitSockets(screen);
rfbHttpInitSockets(screen);
#ifndef WIN32
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);
rfbClientConnectionGone(cl);
}
}
rfbReleaseClientIterator(iter);
}
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
rfbBool
rfbProcessEvents(rfbScreenInfoPtr screen,long usec)
{
rfbClientIteratorPtr i;
rfbClientPtr cl,clPrev;
rfbBool result=FALSE;
extern rfbClientIteratorPtr
rfbGetClientIteratorWithClosed(rfbScreenInfoPtr rfbScreen);
if(usec<0)
usec=screen->deferUpdateTime*1000;
rfbCheckFds(screen,usec);
rfbHttpCheckFds(screen);
i = rfbGetClientIteratorWithClosed(screen);
cl=rfbClientIteratorHead(i);
while(cl) {
result = rfbUpdateClient(cl);
clPrev=cl;
cl=rfbClientIteratorNext(i);
if(clPrev->sock==-1) {
rfbClientConnectionGone(clPrev);
result=TRUE;
}
}
rfbReleaseClientIterator(i);
return result;
}
rfbBool
rfbUpdateClient(rfbClientPtr cl)
{
struct timeval tv;
rfbBool result=FALSE;
rfbScreenInfoPtr screen = cl->screen;
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);
}
}
}
if (!cl->viewOnly && cl->lastPtrX >= 0) {
if(cl->startPtrDeferring.tv_usec == 0) {
gettimeofday(&cl->startPtrDeferring,NULL);
if(cl->startPtrDeferring.tv_usec == 0)
cl->startPtrDeferring.tv_usec++;
} else {
struct timeval tv;
gettimeofday(&tv,NULL);
if(tv.tv_sec < cl->startPtrDeferring.tv_sec /* at midnight */
|| ((tv.tv_sec-cl->startPtrDeferring.tv_sec)*1000
+(tv.tv_usec-cl->startPtrDeferring.tv_usec)/1000)
> cl->screen->deferPtrUpdateTime) {
cl->startPtrDeferring.tv_usec = 0;
cl->screen->ptrAddEvent(cl->lastPtrButtons,
cl->lastPtrX,
cl->lastPtrY, cl);
cl->lastPtrX = -1;
}
}
}
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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