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-rw-r--r--krfb/libvncserver/x11vnc.c578
1 files changed, 578 insertions, 0 deletions
diff --git a/krfb/libvncserver/x11vnc.c b/krfb/libvncserver/x11vnc.c
new file mode 100644
index 00000000..4e298f4a
--- /dev/null
+++ b/krfb/libvncserver/x11vnc.c
@@ -0,0 +1,578 @@
+/* This file (x11vnc.c) is part of LibVNCServer.
+ It is a small clone of x0rfbserver by HexoNet, demonstrating the
+ capabilities of LibVNCServer.
+*/
+
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/extensions/XTest.h>
+#ifndef NO_SHM
+#include <X11/extensions/XShm.h>
+#include <sys/shm.h>
+#endif
+#define KEYSYM_H
+#undef Bool
+#define KeySym RFBKeySym
+#include "rfb.h"
+
+Display *dpy = 0;
+int window;
+int c=0,blockLength = 32;
+int tileX=0,tileY=0,tileWidth=32,tileHeight=32*2,dontTile=TRUE;
+Bool gotInput = FALSE;
+Bool viewOnly = FALSE;
+Bool sharedMode = FALSE;
+
+Bool disconnectAfterFirstClient = TRUE;
+
+/* keyboard handling */
+#define KBDDEBUG
+
+char modifiers[0x100];
+KeyCode keycodes[0x100],leftShiftCode,rightShiftCode,altGrCode;
+
+void init_keycodes()
+{
+ KeySym key,*keymap;
+ int i,j,minkey,maxkey,syms_per_keycode;
+
+ memset(modifiers,-1,sizeof(modifiers));
+
+ XDisplayKeycodes(dpy,&minkey,&maxkey);
+ keymap=XGetKeyboardMapping(dpy,minkey,(maxkey - minkey + 1),&syms_per_keycode);
+
+#ifdef KBDDEBUG
+ fprintf(stderr,"minkey=%d, maxkey=%d, syms_per_keycode=%d\n",
+ minkey,maxkey,syms_per_keycode);
+#endif
+ for (i = minkey; i <= maxkey; i++)
+ for(j=0;j<syms_per_keycode;j++) {
+ key=keymap[(i-minkey)*syms_per_keycode+j];
+#ifdef KBDDEBUG
+ fprintf(stderr,"keymap(i=0x%x,j=%d)==0x%lx\n",i,j,key);
+#endif
+ if(key>=' ' && key<0x100 && i==XKeysymToKeycode(dpy,key)) {
+ keycodes[key]=i;
+ modifiers[key]=j;
+#ifdef KBDDEBUG
+ fprintf(stderr,"key 0x%lx (%c): keycode=0x%x, modifier=%d\n",
+ key,(char)key,i,j);
+#endif
+ }
+ }
+
+ leftShiftCode=XKeysymToKeycode(dpy,XK_Shift_L);
+ rightShiftCode=XKeysymToKeycode(dpy,XK_Shift_R);
+ altGrCode=XKeysymToKeycode(dpy,XK_Mode_switch);
+
+#ifdef KBDDEBUG
+ fprintf(stderr,"leftShift=0x%x, rightShift=0x%x, altGr=0x%x\n",
+ leftShiftCode,rightShiftCode,altGrCode);
+#endif
+
+ XFree ((char *) keymap);
+}
+
+static Bool shutDownServer=0;
+
+/* the hooks */
+
+void clientGone(rfbClientPtr cl)
+{
+ shutDownServer=-1;
+}
+
+enum rfbNewClientAction newClient(rfbClientPtr cl)
+{
+ if(disconnectAfterFirstClient)
+ cl->clientGoneHook = clientGone;
+ if(viewOnly)
+ cl->clientData = (void*)-1;
+ else
+ cl->clientData = (void*)0;
+ return(RFB_CLIENT_ACCEPT);
+}
+
+#define LEFTSHIFT 1
+#define RIGHTSHIFT 2
+#define ALTGR 4
+char ModifierState = 0;
+
+/* this function adjusts the modifiers according to mod (as from modifiers) and ModifierState */
+
+void tweakModifiers(char mod,Bool down)
+{
+ Bool isShift=ModifierState&(LEFTSHIFT|RIGHTSHIFT);
+#ifdef KBDDEBUG
+ fprintf(stderr,"tweakModifiers: 0x%x %s\n",
+ mod,down?"down":"up");
+#endif
+ if(mod<0) return;
+ if(isShift && mod!=1) {
+ if(ModifierState&LEFTSHIFT)
+ XTestFakeKeyEvent(dpy,leftShiftCode,!down,CurrentTime);
+ if(ModifierState&RIGHTSHIFT)
+ XTestFakeKeyEvent(dpy,rightShiftCode,!down,CurrentTime);
+ }
+ if(!isShift && mod==1)
+ XTestFakeKeyEvent(dpy,leftShiftCode,down,CurrentTime);
+
+ if(ModifierState&ALTGR && mod!=2)
+ XTestFakeKeyEvent(dpy,altGrCode,!down,CurrentTime);
+ if(!(ModifierState&ALTGR) && mod==2)
+ XTestFakeKeyEvent(dpy,altGrCode,down,CurrentTime);
+}
+
+void keyboard(Bool down,KeySym keySym,rfbClientPtr cl)
+{
+ if(((int)cl->clientData)==-1) return; /* viewOnly */
+
+#define ADJUSTMOD(sym,state) \
+ if(keySym==sym) { if(down) ModifierState|=state; else ModifierState&=~state; }
+
+ ADJUSTMOD(XK_Shift_L,LEFTSHIFT)
+ ADJUSTMOD(XK_Shift_R,RIGHTSHIFT)
+ ADJUSTMOD(XK_Mode_switch,ALTGR)
+
+#ifdef KBDDEBUG
+ fprintf(stderr,"keyboard: down=%s, keySym=0x%lx (%s), ModState=0x%x\n",
+ down?"down":"up",keySym,XKeysymToString(keySym),ModifierState);
+#endif
+
+ if(keySym>=' ' && keySym<0x100) {
+ KeyCode k;
+ if(down)
+ tweakModifiers(modifiers[keySym],True);
+ //tweakModifiers(modifiers[keySym],down);
+ //k = XKeysymToKeycode( dpy,keySym );
+ k = keycodes[keySym];
+ if(k!=NoSymbol) {
+ XTestFakeKeyEvent(dpy,k,down,CurrentTime);
+ gotInput = TRUE;
+ }
+ if(down)
+ tweakModifiers(modifiers[keySym],False);
+ gotInput = TRUE;
+ } else {
+ KeyCode k = XKeysymToKeycode( dpy,keySym );
+ if(k!=NoSymbol) {
+ XTestFakeKeyEvent(dpy,k,down,CurrentTime);
+ gotInput = TRUE;
+ }
+ }
+}
+
+int oldButtonMask = 0;
+
+void mouse(int buttonMask,int x,int y,rfbClientPtr cl)
+{
+ int i=0;
+
+ if(((int)cl->clientData)==-1) return; /* viewOnly */
+
+ XTestFakeMotionEvent(dpy,0,x,y,CurrentTime );
+ while(i<5) {
+ if ((oldButtonMask&(1<<i))!=(buttonMask&(1<<i)))
+ XTestFakeButtonEvent(dpy,i+1,(buttonMask&(1<<i))?True:False,CurrentTime);
+ i++;
+ }
+ oldButtonMask = buttonMask;
+ //fprintf(stderr,"-");
+ gotInput = TRUE;
+}
+
+/* the X11 interaction */
+
+#ifndef NO_SHM
+Bool useSHM = TRUE;
+XShmSegmentInfo shminfo;
+#else
+Bool useSHM = FALSE;
+#endif
+
+void getImage(int bpp,Display *dpy,int xscreen,XImage **i,int x,int y,int width,int height)
+{
+ if(width<=0) width=DisplayWidth(dpy,xscreen);
+ if(height<=0) height=DisplayHeight(dpy,xscreen);
+ if(useSHM && bpp>0) {
+ static Bool firstTime = TRUE;
+ if(firstTime) {
+ firstTime = FALSE;
+ *i = XShmCreateImage(dpy,
+ DefaultVisual( dpy, xscreen ),
+ bpp,
+ ZPixmap,
+ NULL,
+ &shminfo,
+ width,height);
+
+ if(*i == 0) {
+ useSHM = FALSE;
+ getImage(bpp,dpy,xscreen,i,x,y,width,height);
+ return;
+ }
+
+ shminfo.shmid = shmget( IPC_PRIVATE,
+ (*i)->bytes_per_line * (*i)->height,
+ IPC_CREAT | 0777 );
+ shminfo.shmaddr = (*i)->data = (char *) shmat( shminfo.shmid, 0, 0 );
+ shminfo.readOnly = False;
+ XShmAttach( dpy, &shminfo );
+ }
+
+ if(x==0 && y==0 && width==DisplayWidth(dpy,xscreen) && height==DisplayHeight(dpy,xscreen))
+ XShmGetImage(dpy,window,*i,0,0,AllPlanes);
+ else
+ XGetSubImage(dpy,window,x,y,width,height,AllPlanes,ZPixmap,*i,0,0);
+ } else {
+ *i = XGetImage(dpy,window,x,y,width,height,AllPlanes,ZPixmap );
+ }
+}
+
+void checkForImageUpdates(rfbScreenInfoPtr s,char *b,int rowstride,int x,int y,int width,int height)
+{
+ Bool changed;
+ int i,j,k,l1,l2,x1,y1;
+ int bpp=s->bitsPerPixel/8;
+
+ for(j=0;j<height;j+=blockLength)
+ for(i=0;i<width;i+=blockLength) {
+ y1=j+blockLength; if(y1>height) y1=height;
+ x1=i+blockLength; if(x1>width) x1=width;
+ y1*=rowstride;
+ x1*=bpp;
+ changed=FALSE;
+ for(l1=j*rowstride,l2=(j+y)*s->paddedWidthInBytes+x*bpp;l1<y1;l1+=rowstride,l2+=s->paddedWidthInBytes)
+ for(k=i*bpp;k<x1;k++)
+ if(s->frameBuffer[l2+k]!=b[l1+k]) {
+ // fprintf(stderr,"changed: %d, %d\n",k,l);
+ changed=TRUE;
+ goto changed_p;
+ }
+ if(changed) {
+ changed_p:
+ for(l1+=i*bpp,l2+=i*bpp;l1<y1;l1+=rowstride,l2+=s->paddedWidthInBytes)
+ memcpy(/*b+l,*/s->frameBuffer+l2,b+l1,x1-i*bpp);
+ rfbMarkRectAsModified(s,x+i,y+j,x+i+blockLength,y+j+blockLength);
+ }
+ }
+}
+
+int probeX=0,probeY=0;
+
+void probeScreen(rfbScreenInfoPtr s,int xscreen)
+{
+ int i,j,/*pixel,i1,*/j1,
+ bpp=s->rfbServerFormat.bitsPerPixel/8,/*mask=(1<<bpp)-1,*/
+ rstride=s->paddedWidthInBytes;
+ XImage* im;
+ //fprintf(stderr,"/%d,%d",probeX,probeY);
+#if 0
+ probeX++;
+ if(probeX>=tileWidth) {
+ probeX=0;
+ probeY++;
+ if(probeY>=tileHeight)
+ probeY=0;
+ }
+#else
+ probeX=(rand()%tileWidth);
+ probeY=(rand()%tileHeight);
+#endif
+
+ for(j=probeY;j<s->height;j+=tileHeight)
+ for(i=0/*probeX*/;i<s->width;i+=tileWidth) {
+ im=XGetImage(dpy,window,i,j,tileWidth/*1*/,1,AllPlanes,ZPixmap);
+ /* for(i1=0;i1<bpp && im->data[i1]==(s->frameBuffer+i*bpp+j*rstride)[i1];i1++);
+ if(i1<bpp) { */
+ if(memcmp(im->data,s->frameBuffer+i*bpp+j*rstride,tileWidth*bpp)) {
+ /* do update */
+ int x=i/*-probeX*/,w=(x+tileWidth>s->width)?s->width-x:tileWidth,
+ y=j-probeY,h=(y+tileHeight>s->height)?s->height-y:tileHeight;
+
+ XDestroyImage(im);
+ //getImage(bpp,dpy,xscreen,&im,x,y,w,h);
+ //fprintf(stderr,"GetImage(%d,%d,%d,%d)",x,y,w,h);
+ im = XGetImage(dpy,window,x,y,w,h,AllPlanes,ZPixmap );
+ for(j1=0;j1<h;j1++)
+ memcpy(s->frameBuffer+x*bpp+(y+j1)*rstride,
+ im->data+j1*im->bytes_per_line,bpp*w);
+ //checkForImageUpdates(s,im->data,rstride,x,y,w,h);
+ //if(0 && !useSHM)
+ XDestroyImage(im);
+ //memcpy(s->frameBuffer+i*bpp+j*rstride,&pixel,bpp);
+ rfbMarkRectAsModified(s,x,y,x+w,y+h);
+ //fprintf(stderr,"%d:%d:%x\n",i,j,pixel);
+ //fprintf(stderr,"*");
+ } else
+ XDestroyImage(im);
+ }
+}
+
+#define LOCAL_CONTROL
+
+#ifdef LOCAL_CONTROL
+#include "1instance.c"
+#endif
+
+/* the main program */
+
+int main(int argc,char** argv)
+{
+ //Screen *sc;
+ //Colormap cm;
+ XImage *framebufferImage;
+ char *backupImage;
+ int xscreen,i;
+ rfbScreenInfoPtr screen;
+ int maxMsecsToConnect = 5000; /* a maximum of 5 seconds to connect */
+ int updateCounter; /* about every 50 ms a screen update should be made. */
+
+#ifdef LOCAL_CONTROL
+ char message[1024];
+ single_instance_struct single_instance = { "/tmp/x11vnc_control" };
+
+ open_control_file(&single_instance);
+#endif
+
+ for(i=argc-1;i>0;i--)
+#ifdef LOCAL_CONTROL
+ if(i<argc-1 && !strcmp(argv[i],"-toggleviewonly")) {
+ snprintf(message, sizeof(message), "t%s",argv[i+1]);
+ send_message(&single_instance,message);
+ exit(0);
+ } else if(!strcmp(argv[i],"-listclients")) {
+ fprintf(stderr,"list clients\n");
+ send_message(&single_instance,"l");
+ exit(0);
+ } else
+#ifdef BACKCHANNEL
+ if(i<argc-1 && !strcmp(argv[i],"-backchannel")) {
+ snprintf(message, sizeof(message), "b%s",argv[i+1]);
+ send_message(&single_instance,message);
+ exit(0);
+ } else
+#endif
+#endif
+ if(i<argc-1 && strcmp(argv[i],"-display")==0) {
+ fprintf(stderr,"Using display %s\n",argv[i+1]);
+ dpy = XOpenDisplay(argv[i+1]);
+ if(dpy==0) {
+ fprintf(stderr,"Couldn't connect to display \"%s\".\n",argv[i+1]);
+ exit(1);
+ }
+ } else if(i<argc-1 && strcmp(argv[i],"-wait4client")==0) {
+ maxMsecsToConnect = atoi(argv[i+1]);
+ } else if(i<argc-1 && strcmp(argv[i],"-update")==0) {
+ updateCounter = atoi(argv[i+1]);
+ } else if(strcmp(argv[i],"-noshm")==0) {
+ useSHM = FALSE;
+ } else if(strcmp(argv[i],"-runforever")==0) {
+ disconnectAfterFirstClient = FALSE;
+ } else if(strcmp(argv[i],"-tile")==0) {
+ dontTile=FALSE;
+ } else if(strcmp(argv[i],"-viewonly")==0) {
+ viewOnly=TRUE;
+ } else if(strcmp(argv[i],"-shared")==0) {
+ sharedMode=TRUE;
+ }
+
+ updateCounter = dontTile?20:1;
+
+ if(dpy==0)
+ dpy = XOpenDisplay("");
+ if(dpy==0) {
+ fprintf(stderr,"Couldn't open display!\n");
+ exit(2);
+ }
+
+ xscreen = DefaultScreen(dpy);
+ window = RootWindow(dpy,xscreen);
+ //XTestGrabControl(dpy,True);
+
+ init_keycodes();
+
+ getImage(0,dpy,xscreen,&framebufferImage,0,0,-1,-1);
+
+ screen = rfbGetScreen(&argc,argv,framebufferImage->width,
+ framebufferImage->height,
+ framebufferImage->bits_per_pixel,
+ 8,
+ framebufferImage->bits_per_pixel/8);
+
+ screen->paddedWidthInBytes = framebufferImage->bytes_per_line;
+
+ screen->rfbServerFormat.bitsPerPixel = framebufferImage->bits_per_pixel;
+ screen->rfbServerFormat.depth = framebufferImage->depth;
+ //rfbEndianTest = framebufferImage->bitmap_bit_order != MSBFirst;
+ screen->rfbServerFormat.trueColour = TRUE;
+
+ if ( screen->rfbServerFormat.bitsPerPixel == 8 ) {
+ if(CellsOfScreen(ScreenOfDisplay(dpy,xscreen))) {
+ XColor color[256];
+ int i;
+ screen->colourMap.count = 256;
+ screen->rfbServerFormat.trueColour = FALSE;
+ screen->colourMap.is16 = TRUE;
+ for(i=0;i<256;i++)
+ color[i].pixel=i;
+ XQueryColors(dpy,DefaultColormap(dpy,xscreen),color,256);
+ screen->colourMap.data.shorts = (short*)malloc(3*sizeof(short)*screen->colourMap.count);
+ for(i=0;i<screen->colourMap.count;i++) {
+ screen->colourMap.data.shorts[i*3+0] = color[i].red;
+ screen->colourMap.data.shorts[i*3+1] = color[i].green;
+ screen->colourMap.data.shorts[i*3+2] = color[i].blue;
+ }
+ } else {
+ screen->rfbServerFormat.redShift = 0;
+ screen->rfbServerFormat.greenShift = 2;
+ screen->rfbServerFormat.blueShift = 5;
+ screen->rfbServerFormat.redMax = 3;
+ screen->rfbServerFormat.greenMax = 7;
+ screen->rfbServerFormat.blueMax = 3;
+ }
+ } else {
+ screen->rfbServerFormat.redShift = 0;
+ if ( framebufferImage->red_mask )
+ while ( ! ( framebufferImage->red_mask & (1 << screen->rfbServerFormat.redShift) ) )
+ screen->rfbServerFormat.redShift++;
+ screen->rfbServerFormat.greenShift = 0;
+ if ( framebufferImage->green_mask )
+ while ( ! ( framebufferImage->green_mask & (1 << screen->rfbServerFormat.greenShift) ) )
+ screen->rfbServerFormat.greenShift++;
+ screen->rfbServerFormat.blueShift = 0;
+ if ( framebufferImage->blue_mask )
+ while ( ! ( framebufferImage->blue_mask & (1 << screen->rfbServerFormat.blueShift) ) )
+ screen->rfbServerFormat.blueShift++;
+ screen->rfbServerFormat.redMax = framebufferImage->red_mask >> screen->rfbServerFormat.redShift;
+ screen->rfbServerFormat.greenMax = framebufferImage->green_mask >> screen->rfbServerFormat.greenShift;
+ screen->rfbServerFormat.blueMax = framebufferImage->blue_mask >> screen->rfbServerFormat.blueShift;
+ }
+
+ backupImage = malloc(screen->height*screen->paddedWidthInBytes);
+ memcpy(backupImage,framebufferImage->data,screen->height*screen->paddedWidthInBytes);
+
+ screen->frameBuffer = backupImage;
+ screen->cursor = 0;
+ screen->newClientHook = newClient;
+
+ screen->kbdAddEvent = keyboard;
+ screen->ptrAddEvent = mouse;
+
+ if(sharedMode) {
+ screen->rfbAlwaysShared = TRUE;
+ }
+
+ screen->rfbDeferUpdateTime = 1;
+ updateCounter /= screen->rfbDeferUpdateTime;
+
+ rfbInitServer(screen);
+
+ c=0;
+ while(1) {
+ if(screen->rfbClientHead)
+ maxMsecsToConnect = 1<<16;
+ else {
+ maxMsecsToConnect -= screen->rfbDeferUpdateTime;
+ if(maxMsecsToConnect<0) {
+ fprintf(stderr,"Maximum time to connect reached. Exiting.\n");
+ XTestDiscard(dpy);
+ exit(2);
+ }
+ }
+
+#ifdef LOCAL_CONTROL
+ if(get_next_message(message,1024,&single_instance,50)) {
+ if(message[0]=='l' && message[1]==0) {
+ rfbClientPtr cl;
+ int i;
+ for(i=0,cl=screen->rfbClientHead;cl;cl=cl->next,i++)
+ fprintf(stderr,"%02d: %s\n",i,cl->host);
+ } else if(message[0]=='t') {
+ rfbClientPtr cl;
+ for(cl=screen->rfbClientHead;cl;cl=cl->next)
+ if(!strcmp(message+1,cl->host)) {
+ cl->clientData=(void*)((cl->clientData==0)?-1:0);
+ break;
+ }
+ }
+#ifdef BACKCHANNEL
+ else if(message[0]=='b')
+ rfbSendBackChannel(screen,message+1,strlen(message+1));
+#endif
+ }
+#endif
+
+ rfbProcessEvents(screen,-1);
+ if(shutDownServer) {
+ free(backupImage);
+ rfbScreenCleanup(screen);
+ XFree(dpy);
+#ifndef NO_SHM
+ XShmDetach(dpy,framebufferImage);
+#endif
+ exit(0);
+ }
+
+ if(dontTile) {
+ if(gotInput) {
+ gotInput = FALSE;
+ c=updateCounter;
+ } else if(screen->rfbClientHead && c++>updateCounter) {
+ c=0;
+ //fprintf(stderr,"*");
+ if(!useSHM)
+ framebufferImage->f.destroy_image(framebufferImage);
+ if(dontTile) {
+ getImage(screen->rfbServerFormat.bitsPerPixel,dpy,xscreen,&framebufferImage,0,0,screen->width,screen->height);
+ checkForImageUpdates(screen,framebufferImage->data,framebufferImage->bytes_per_line,
+ 0,0,screen->width,screen->height);
+ } else {
+ /* old tile code. Eventually to be removed (TODO) */
+ char isRightEdge = tileX+tileWidth>=screen->width;
+ char isLowerEdge = tileY+tileHeight>=screen->height;
+ getImage(screen->rfbServerFormat.bitsPerPixel,dpy,xscreen,&framebufferImage,tileX,tileY,
+ isRightEdge?screen->width-tileX:tileWidth,
+ isLowerEdge?screen->height-tileY:tileHeight);
+ checkForImageUpdates(screen,framebufferImage->data,framebufferImage->bytes_per_line,
+ tileX,tileY,
+ isRightEdge?screen->width-tileX:tileWidth,
+ isLowerEdge?screen->height-tileY:tileHeight);
+ if(isRightEdge) {
+ tileX=0;
+ if(isLowerEdge)
+ tileY=0;
+ else
+ tileY+=tileHeight;
+ } else
+ tileX+=tileWidth;
+ }
+ }
+ } else if(c++>updateCounter) {
+ c=0;
+ probeScreen(screen,xscreen);
+ }
+
+#ifdef WRITE_SNAPS
+ {
+ int i,j,r,g,b;
+ FILE* f=fopen("test.pnm","wb");
+ fprintf(f,"P6\n%d %d\n255\n",screen->width,screen->height);
+ for(j=0;j<screen->height;j++)
+ for(i=0;i<screen->width;i++) {
+ //r=screen->frameBuffer[j*screen->paddedWidthInBytes+i*2];
+ r=framebufferImage->data[j*screen->paddedWidthInBytes+i*2];
+ fputc(((r>>screen->rfbServerFormat.redShift)&screen->rfbServerFormat.redMax)*255/screen->rfbServerFormat.redMax,f);
+ fputc(((r>>screen->rfbServerFormat.greenShift)&screen->rfbServerFormat.greenMax)*255/screen->rfbServerFormat.greenMax,f);
+ fputc(((r>>screen->rfbServerFormat.blueShift)&screen->rfbServerFormat.blueMax)*255/screen->rfbServerFormat.blueMax,f);
+ }
+ fclose(f);
+ }
+#endif
+ }
+#ifndef NO_SHM
+ //XShmDetach(dpy,framebufferImage);
+#endif
+
+ return(0);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-14 17:36:46 +0000