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