Hi, every one.
I'm trying something with the java viewer of vnc 4
I'm trying to do an intelligent redirectionner.
So i take the java viwer, and open a socket server on it to accept the
connection of some other java viewer.
I do the init part, and copy on a buffer the rect i receive from the
original server.
I works quite good !
but only for the none compress mode.
I can't make it work's with the ZRLE mode.
in fact if i copy simply the decode stream it doesn't wor because i had to
keep it compressed.
But when i copy the buffer juste before the decompression, and send it to
the other client, i got a inflate error on the decode.
But i do a lot of test, and compare the buffer of the redirectionner, and
the viewer and it seem's be the same ?
i certainlny don't understand some thing, but i can't find what ???
If someome can help me PLEASE !!!
My code :
it's on the ZlibStream class.
the rest is not touch.
the "dupMem._dataOutputStream.write(buf_mem[i]);" is the copy.
and the 2 boucle under "**********TRACE***********" are the print on the
console off the stream compressed and uncompressed.
it is the same compress stream for the client, but on the first decode it
does a "java.util.zip.DataFormatException"
so there's certainly a problem ! or something that i don't understand on the
dicodage with ZRLE
CODE :
protected int overrun(int itemSize, int nItems) {
if (itemSize > bufSize)
throw new Exception("ZlibInStream overrun: max itemSize exceeded");
if (underlying == null)
throw new Exception("ZlibInStream overrun: no underlying stream");
if (end - ptr != 0)
System.arraycopy(b, ptr, b, 0, end - ptr);
ptrOffset += ptr;
end -= ptr;
ptr = 0;
while (end < itemSize) {
decompress();
}
if (itemSize * nItems > end)
nItems = end / itemSize;
return nItems;
}
// decompress() calls the decompressor once. Note that this won't
// necessarily generate any output data - it may just consume some input
// data. Returns false if wait is false and we would block on the
underlying
// stream.
private void decompress() {
try {
underlying.check(1);
int avail_in = underlying.getend() - underlying.getptr();
if (avail_in > bytesIn)
avail_in = bytesIn;
/**********TRACE**************/
System.err.println("Avail_In ="+avail_in );System.err.flush();
byte[] buf_mem=null;
int ptr_mem=0;
buf_mem=underlying.getbuf();
ptr_mem=underlying.getptr();
int passage;
/*****************************/
if (inflater.needsInput()) {
/*******************TRACE***********************/
DuplicateurMem dupMem = DuplicateurMem.getInstance();// matt
passage=0;
for(int i=ptr_mem;i<(ptr_mem+avail_in);i++){
try{
if(passage<20 || passage>(avail_in-20))
System.err.println("Data["+i+"] : "+buf_mem[i]
);System.err.flush();
if(passage==20)System.err.println("...");System.err.flush();
dupMem._dataOutputStream.write(buf_mem[i]);
passage++;
}catch(java.io.IOException e){}
}
saveSecretKey(new File("c:/bufmem.txt"),buf_mem );
/****************************************************/
inflater.setInput(underlying.getbuf(), underlying.getptr(),
avail_in);
//inflater.setInput(buf_mem, ptr_mem, avail_in);
}
//System.err.println("ptr="+ptr_mem+" avail_in
"+avail_in);System.err.flush();
int n=0;
try{
n = inflater.inflate(b, end, bufSize - end);
}catch(java.util.zip.DataFormatException e){}
/********************TRACE*************************/
System.err.println("Inflate : end="+end+"
bufSize-end="+(bufSize-end)+" nbUncompress="+n+"
TotalUncompress="+inflater.getTotalIn()+"
Totalinput="+inflater.getTotalOut() );System.err.flush();
passage=0;
for(int i=end;i<(n+end);i++){
if(passage<20 || passage>(n+end-20))
System.err.println("DataUncompress["+i+"] : "+b[i]
);System.err.flush();
if(passage==20)System.err.println("...");System.err.flush();
passage++;
}
saveSecretKey(new File("c:/b.txt"),b );
/**************************************************/
end += n;
if (inflater.needsInput()) {
bytesIn -= avail_in;
underlying.setptr(underlying.getptr() + avail_in);
}
} catch (/*java.util.zip.DataFormat*/Exception e) {
throw new Exception("ZlibInStream: inflate failed");
}
}
Thanks a lot for Help !!!
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