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libtdevnc/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 <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#ifndef false
#define false 0
#define true -1
#endif
#include <sys/types.h>
#ifndef WIN32
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#endif
#include <signal.h>
#include <time.h>
#include "rfb.h"
#include "sraRegion.h"
MUTEX(logMutex);
/*
* rfbLog prints a time-stamped message to the log file (stderr).
*/
void
rfbLog(char *format, ...)
{
va_list args;
char buf[256];
time_t log_clock;
LOCK(logMutex);
va_start(args, format);
time(&log_clock);
strftime(buf, 255, "%d/%m/%Y %T ", localtime(&log_clock));
fprintf(stderr, buf);
vfprintf(stderr, format, args);
fflush(stderr);
va_end(args);
UNLOCK(logMutex);
}
void rfbLogPerror(char *str)
{
rfbLog("%s: %s\n", str, strerror(errno));
}
void rfbScheduleCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
rfbUndrawCursor(rfbScreen);
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 0
//TODO: is this needed? Or does it mess up deferring?
/* while(!sraRgnEmpty(cl->copyRegion)) */ {
#ifdef HAVE_PTHREADS
if(!cl->screen->backgroundLoop)
#endif
{
sraRegionPtr updateRegion = sraRgnCreateRgn(cl->modifiedRegion);
sraRgnOr(updateRegion,cl->copyRegion);
UNLOCK(cl->updateMutex);
rfbSendFramebufferUpdate(cl,updateRegion);
sraRgnDestroy(updateRegion);
continue;
}
}
#endif
} else {
sraRgnOr(cl->modifiedRegion,copyRegion);
}
SIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
void rfbDoCopyRegion(rfbScreenInfoPtr rfbScreen,sraRegionPtr copyRegion,int dx,int dy)
{
sraRectangleIterator* i;
sraRect rect;
int j,widthInBytes,bpp=rfbScreen->rfbServerFormat.bitsPerPixel/8,
rowstride=rfbScreen->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 = rfbScreen->frameBuffer+rect.x1*bpp+rect.y1*rowstride;
in = rfbScreen->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(rfbScreen,copyRegion,dx,dy);
}
void rfbDoCopyRect(rfbScreenInfoPtr rfbScreen,int x1,int y1,int x2,int y2,int dx,int dy)
{
sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2);
rfbDoCopyRegion(rfbScreen,region,dx,dy);
}
void rfbScheduleCopyRect(rfbScreenInfoPtr rfbScreen,int x1,int y1,int x2,int y2,int dx,int dy)
{
sraRegionPtr region = sraRgnCreateRect(x1,y1,x2,y2);
rfbScheduleCopyRegion(rfbScreen,region,dx,dy);
}
void rfbMarkRegionAsModified(rfbScreenInfoPtr rfbScreen,sraRegionPtr modRegion)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator))) {
LOCK(cl->updateMutex);
sraRgnOr(cl->modifiedRegion,modRegion);
SIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
}
rfbReleaseClientIterator(iterator);
}
void rfbMarkRectAsModified(rfbScreenInfoPtr rfbScreen,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>=rfbScreen->width) x2=rfbScreen->width-1;
if(x1==x2) return;
if(y1>y2) { i=y1; y1=y2; y2=i; }
if(y1<0) y1=0;
if(y2>=rfbScreen->height) y2=rfbScreen->height-1;
if(y1==y2) return;
region = sraRgnCreateRect(x1,y1,x2,y2);
rfbMarkRegionAsModified(rfbScreen,region);
sraRgnDestroy(region);
}
int rfbDeferUpdateTime = 40; /* ms */
#ifdef HAVE_PTHREADS
static void *
clientOutput(void *data)
{
rfbClientPtr cl = (rfbClientPtr)data;
Bool 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(rfbDeferUpdateTime * 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. */
rfbSendFramebufferUpdate(cl, updateRegion);
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);
SIGNAL(cl->updateCond);
UNLOCK(cl->updateMutex);
IF_PTHREADS(pthread_join(output_thread, NULL));
rfbClientConnectionGone(cl);
return NULL;
}
void*
listenerRun(void *data)
{
rfbScreenInfoPtr rfbScreen=(rfbScreenInfoPtr)data;
int client_fd;
struct sockaddr_in peer;
pthread_t client_thread;
rfbClientPtr cl;
int len;
len = sizeof(peer);
while ((client_fd = accept(rfbScreen->rfbListenSock,
(struct sockaddr *)&peer, &len)) >= 0) {
cl = rfbNewClient(rfbScreen,client_fd);
pthread_create(&client_thread, NULL, clientInput, (void *)cl);
len = sizeof(peer);
}
rfbLog("accept failed\n");
exit(1);
}
#endif
static void
usage(void)
{
fprintf(stderr, "-rfbport port TCP port for RFB protocol\n");
fprintf(stderr, "-rfbwait time max time in ms to wait for RFB client\n");
fprintf(stderr, "-rfbauth passwd-file use authentication on RFB protocol\n"
" (use 'storepasswd' to create a password file)\n");
fprintf(stderr, "-deferupdate time time in ms to defer updates "
"(default 40)\n");
fprintf(stderr, "-desktop name VNC desktop name (default \"LibVNCServer\")\n");
fprintf(stderr, "-alwaysshared always treat new clients as shared\n");
fprintf(stderr, "-nevershared never treat new clients as shared\n");
fprintf(stderr, "-dontdisconnect don't disconnect existing clients when a "
"new non-shared\n"
" connection comes in (refuse new connection "
"instead)\n");
exit(1);
}
static void
processArguments(rfbScreenInfoPtr rfbScreen,int argc, char *argv[])
{
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-rfbport") == 0) { /* -rfbport port */
if (i + 1 >= argc) usage();
rfbScreen->rfbPort = atoi(argv[++i]);
} else if (strcmp(argv[i], "-rfbwait") == 0) { /* -rfbwait ms */
if (i + 1 >= argc) usage();
rfbScreen->rfbMaxClientWait = atoi(argv[++i]);
} else if (strcmp(argv[i], "-rfbauth") == 0) { /* -rfbauth passwd-file */
if (i + 1 >= argc) usage();
rfbScreen->rfbAuthPasswdData = argv[++i];
} else if (strcmp(argv[i], "-deferupdate") == 0) { /* -desktop desktop-name */
if (i + 1 >= argc) usage();
rfbScreen->rfbDeferUpdateTime = atoi(argv[++i]);
} else if (strcmp(argv[i], "-desktop") == 0) { /* -desktop desktop-name */
if (i + 1 >= argc) usage();
rfbScreen->desktopName = argv[++i];
} else if (strcmp(argv[i], "-alwaysshared") == 0) {
rfbScreen->rfbAlwaysShared = TRUE;
} else if (strcmp(argv[i], "-nevershared") == 0) {
rfbScreen->rfbNeverShared = TRUE;
} else if (strcmp(argv[i], "-dontdisconnect") == 0) {
rfbScreen->rfbDontDisconnect = TRUE;
} else {
/* usage(); we no longer exit for unknown arguments */
}
}
}
void
defaultKbdAddEvent(Bool down, KeySym keySym, rfbClientPtr cl)
{
}
void
defaultPtrAddEvent(int buttonMask, int x, int y, rfbClientPtr cl)
{
if(x!=cl->screen->cursorX || y!=cl->screen->cursorY) {
if(cl->screen->cursorIsDrawn)
rfbUndrawCursor(cl->screen);
LOCK(cl->screen->cursorMutex);
if(!cl->screen->cursorIsDrawn) {
cl->screen->cursorX = x;
cl->screen->cursorY = y;
}
UNLOCK(cl->screen->cursorMutex);
}
}
void defaultSetXCutText(char* text, int len, rfbClientPtr cl)
{
}
/* TODO: add a nice VNC or RFB cursor */
#ifdef WIN32
static rfbCursor myCursor =
{
"\000\102\044\030\044\102\000",
"\347\347\176\074\176\347\347",
8, 7, 3, 3,
0, 0, 0,
0xffff, 0xffff, 0xffff,
0
};
#else
static rfbCursor myCursor =
{
source: "\000\102\044\030\044\102\000",
mask: "\347\347\176\074\176\347\347",
width: 8, height: 7, xhot: 3, yhot: 3,
/*
width: 8, height: 7, xhot: 0, yhot: 0,
source: "\000\074\176\146\176\074\000",
mask: "\176\377\377\377\377\377\176",
*/
foreRed: 0, foreGreen: 0, foreBlue: 0,
backRed: 0xffff, backGreen: 0xffff, backBlue: 0xffff,
richSource: 0
};
#endif
rfbCursorPtr defaultGetCursorPtr(rfbClientPtr cl)
{
return(cl->screen->cursor);
}
/* response is cl->authChallenge vncEncrypted with passwd */
Bool defaultPasswordCheck(rfbClientPtr cl,char* response,int len)
{
int i;
char *passwd=vncDecryptPasswdFromFile(cl->screen->rfbAuthPasswdData);
if(!passwd) {
rfbLog("Couldn't read password file: %s\n",cl->screen->rfbAuthPasswdData);
return(FALSE);
}
vncEncryptBytes(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) {
rfbLog("rfbAuthProcessClientMessage: authentication failed from %s\n",
cl->host);
return(FALSE);
}
return(TRUE);
}
void doNothingWithClient(rfbClientPtr cl)
{
}
rfbScreenInfoPtr rfbGetScreen(int argc,char** argv,
int width,int height,int bitsPerSample,int samplesPerPixel,
int bytesPerPixel)
{
rfbScreenInfoPtr rfbScreen=malloc(sizeof(rfbScreenInfo));
rfbPixelFormat* format=&rfbScreen->rfbServerFormat;
INIT_MUTEX(logMutex);
if(width&3)
fprintf(stderr,"WARNING: Width (%d) is not a multiple of 4. VncViewer has problems with that.\n",width);
rfbScreen->rfbClientHead=0;
rfbScreen->rfbPort=5900;
rfbScreen->socketInitDone=FALSE;
rfbScreen->inetdInitDone = FALSE;
rfbScreen->inetdSock=-1;
rfbScreen->udpSock=-1;
rfbScreen->udpSockConnected=FALSE;
rfbScreen->udpPort=0;
rfbScreen->udpClient=0;
rfbScreen->maxFd=0;
rfbScreen->rfbListenSock=-1;
rfbScreen->httpInitDone=FALSE;
rfbScreen->httpPort=0;
rfbScreen->httpDir=NULL;
rfbScreen->httpListenSock=-1;
rfbScreen->httpSock=-1;
rfbScreen->httpFP=NULL;
rfbScreen->desktopName = "LibVNCServer";
rfbScreen->rfbAlwaysShared = FALSE;
rfbScreen->rfbNeverShared = FALSE;
rfbScreen->rfbDontDisconnect = FALSE;
rfbScreen->rfbAuthPasswdData = 0;
processArguments(rfbScreen,argc,argv);
rfbScreen->width = width;
rfbScreen->height = height;
rfbScreen->bitsPerPixel = rfbScreen->depth = 8*bytesPerPixel;
#ifdef WIN32
{
DWORD dummy=255;
GetComputerName(rfbScreen->rfbThisHost,&dummy);
}
#else
gethostname(rfbScreen->rfbThisHost, 255);
#endif
rfbScreen->paddedWidthInBytes = width*bytesPerPixel;
/* format */
format->bitsPerPixel = rfbScreen->bitsPerPixel;
format->depth = rfbScreen->depth;
format->bigEndian = rfbEndianTest?FALSE:TRUE;
format->trueColour = TRUE;
rfbScreen->colourMap.count = 0;
rfbScreen->colourMap.is16 = 0;
rfbScreen->colourMap.data.bytes = NULL;
if(bytesPerPixel == 1) {
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 {
format->redShift = bitsPerSample*3;
format->greenShift = bitsPerSample*2;
format->blueShift = bitsPerSample;
}
}
/* cursor */
rfbScreen->cursorIsDrawn = FALSE;
rfbScreen->dontSendFramebufferUpdate = FALSE;
rfbScreen->cursorX=rfbScreen->cursorY=rfbScreen->underCursorBufferLen=0;
rfbScreen->underCursorBuffer=NULL;
rfbScreen->dontConvertRichCursorToXCursor = FALSE;
rfbScreen->cursor = &myCursor;
INIT_MUTEX(rfbScreen->cursorMutex);
IF_PTHREADS(rfbScreen->backgroundLoop = FALSE);
/* proc's and hook's */
rfbScreen->kbdAddEvent = defaultKbdAddEvent;
rfbScreen->kbdReleaseAllKeys = doNothingWithClient;
rfbScreen->ptrAddEvent = defaultPtrAddEvent;
rfbScreen->setXCutText = defaultSetXCutText;
rfbScreen->getCursorPtr = defaultGetCursorPtr;
rfbScreen->setTranslateFunction = rfbSetTranslateFunction;
rfbScreen->passwordCheck = defaultPasswordCheck;
rfbScreen->newClientHook = doNothingWithClient;
rfbScreen->displayHook = 0;
/* initialize client list and iterator mutex */
rfbClientListInit(rfbScreen);
return(rfbScreen);
}
void rfbScreenCleanup(rfbScreenInfoPtr rfbScreen)
{
/* TODO */
if(rfbScreen->frameBuffer)
free(rfbScreen->frameBuffer);
if(rfbScreen->colourMap.data.bytes)
free(rfbScreen->colourMap.data.bytes);
TINI_MUTEX(rfbScreen->cursorMutex);
free(rfbScreen);
}
#ifdef HAVE_PTHREADS
void rfbInitServerWithPthreads(rfbScreenInfoPtr rfbScreen)
#else
void rfbInitServer(rfbScreenInfoPtr rfbScreen)
#endif
{
#ifdef WIN32
WSADATA trash;
int i=WSAStartup(MAKEWORD(2,2),&trash);
#endif
rfbInitSockets(rfbScreen);
httpInitSockets(rfbScreen);
}
void
rfbProcessEvents(rfbScreenInfoPtr rfbScreen,long usec)
{
rfbClientIteratorPtr i;
rfbClientPtr cl,clPrev;
struct timeval tv;
rfbCheckFds(rfbScreen,usec);
httpCheckFds(rfbScreen);
#ifdef CORBA
corbaCheckFds(rfbScreen);
#endif
i = rfbGetClientIterator(rfbScreen);
cl=rfbClientIteratorNext(i);
while(cl) {
if(cl->sock>=0 && FB_UPDATE_PENDING(cl)) {
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)
> cl->screen->rfbDeferUpdateTime) {
cl->startDeferring.tv_usec = 0;
rfbSendFramebufferUpdate(cl,cl->modifiedRegion);
}
}
}
clPrev=cl;
cl=rfbClientIteratorNext(i);
if(clPrev->sock==-1)
rfbClientConnectionGone(clPrev);
}
rfbReleaseClientIterator(i);
}
void rfbRunEventLoop(rfbScreenInfoPtr rfbScreen, long usec, Bool runInBackground)
{
if(runInBackground) {
#ifdef HAVE_PTHREADS
pthread_t listener_thread;
rfbScreen->backgroundLoop = TRUE;
pthread_create(&listener_thread, NULL, listenerRun, rfbScreen);
return;
#else
fprintf(stderr,"Can't run in background, because I don't have PThreads!\n");
exit(-1);
#endif
}
while(1)
rfbProcessEvents(rfbScreen,usec);
}
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