package ip.gui;
import utils.Byte;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;
public class StreamSniffer {
private BufferedInputStream bis;
private byte header[] = new byte[6];
private int numberActuallyRead = 0;
public StreamSniffer(InputStream is) {
bis = new BufferedInputStream(is);
init();
sniff();
}
public BufferedInputStream getStream() {
return bis;
}
private void sniff() {
if (!bis.markSupported()) {
System.out.println(
"StreamSniffer needs" +
" a markable stream");
return;
}
bis.mark(header.length);
try {
numberActuallyRead
= bis.read(header);
bis.reset();
} catch (IOException e) {
System.out.println(e);
numberActuallyRead = -1;
}
}
public void printHeader() {
System.out.println("In hex...");
for (int i = 0; i < header.length; i++)
Byte.printToHex(header[i]);
System.out.println("\nin base 8...");
for (int i = 0; i < header.length; i++)
Byte.printToOctal(header[i]);
System.out.println("\n in ASCII");
System.out.println(new String(header));
System.out.println("if (match("
+ Byte.toString(header[0]) + ","
+ Byte.toString(header[1]) + ","
+ Byte.toString(header[2]) + ","
+ Byte.toString(header[3]) + "))");
}
public String toString() {
int id = classifyStream();
String s = getStringForId(id);
if (id == TYPENOTFOUND)
printHeader();
return s;
}
public boolean match(
char c0, char c1) {
byte b[] = header;
return
(b[0] == c0) &&
(b[1] == c1);
}
public boolean match(
char c0, char c1,
char c2, char c3) {
byte b[] = header;
return
(b[0] == (c0 & 0xFF)) &&
(b[1] == (c1 & 0xFF)) &&
(b[2] == (c2 & 0xFF)) &&
(b[3] == (c3 & 0xFF));
}
public boolean match(
int c0, int c1,
int c2, int c3) {
byte b[] = header;
return
((b[0] & 0xFF) == (c0 & 0xFF)) &&
((b[1] & 0xFF) == (c1 & 0xFF)) &&
((b[2] & 0xFF) == (c2 & 0xFF)) &&
((b[3] & 0xFF) == (c3 & 0xFF));
}
public boolean match(
int c0, int c1) {
byte b[] = header;
return
((b[0] & 0xFF) == (c0 & 0xFF)) &&
((b[1] & 0xFF) == (c1 & 0xFF));
}
public int classifyStream() {
byte b[] = header;
String s = new String(b);
short leshort =
(short) (
(b[0] << 8) | (b[1]));
int belong =
(b[0] << 24) |
(b[1] << 16) |
(b[2] << 8) |
(b[3]);
if (s.startsWith("begin"))
return UUENCODED;
if (s.startsWith("xbtoa"))
return BTOAD;
if (s.startsWith("P1"))
return PBM;
if (s.startsWith("P2"))
return PGM;
if (s.startsWith("P3"))
return PPM;
if (s.startsWith("P4"))
return PBM_RAWBITS;
if (s.startsWith("P5"))
return PGM_RAWBITS;
if (s.startsWith("P6"))
return PPM_RAWBITS;
if (s.startsWith("yz"))
return MGR_BITMAP;
if (s.startsWith("ILBM"))
return IFF_ILBM;
if ((b[0] == 131) &&
(b[1] == 246) &&
(b[2] == 152) &&
(b[3] == 225))
return SUNRASTER;
if ((b[0] == 1) &&
(b[1] == 332))
return SGI_IMAGE;
if ((b[0] == 361) &&
(b[1] == 0) &&
(b[2] == 100) &&
(b[3] == 273))
return CMU_WINDOW_MANAGER_BITMAP;
if ((b[0] == 131) &&
(b[1] == 246) &&
(b[2] == 152) &&
(b[3] == 225))
return SUN;
if ((b[0] == 115) &&
(b[1] == 115))
return TIFF_BIG_ENDIAN;
if ((b[0] == 111) &&
(b[1] == 111))
return TIFF_LITTLE_ENDIAN;
if (match(73, 73, 42, 0))
return TIFF_LITTLE_ENDIAN;
if (s.startsWith("GIF87a"))
return GIF87a;
if (s.startsWith("GIF89a"))
return GIF89a;
if ((b[0] == 131) &&
(b[1] == 246) &&
(b[2] == 152) &&
(b[3] == 225))
return SUNRASTER;
if (leshort == 0xAF11)
return FLI;
if ((b[0] == 0) &&
(b[1] == 0) &&
(b[2] == 1) &&
(b[3] == 263))
return MPEG;
if (s.startsWith(".snd"))
return SUN_NEXT_AUDIO;
if (s.startsWith("MThd"))
return STANDARD_MIDI;
if (s.startsWith("RIFF"))
return MICROSOFT_RIFF;
if (s.startsWith("BZ"))
return BZIP;
if (s.startsWith("FORM"))
return IFF_DATA;
if (s.startsWith("IIN1"))
return NIFF_IMAGE;
if (s.startsWith("BM"))
return PC_BITMAP;
if (s.startsWith("%PDF-"))
return PDF_DOCUMENT;
if (s.startsWith("%!"))
return POSTSCRIPT_DOCUMENT;
if (s.startsWith("MOVI"))
return SILICON_GRAPHICS_MOVIE;
if (s.startsWith("moov"))
return APPLE_QUICKTIME_MOVIE;
if (s.startsWith("mdat"))
return APPLE_QUICKTIME_MOVIE;
if (match('P', 'K'))
return ZIP_ARCHIVE;
if (match(03, 0235))
return UNIX_COMPRESS;
if (match(037, 0213))
return GZIP;
if (match(037, 036))
return HUFFMAN;
if (match((char) 0x89, 'P', 'N', 'G'))
return PNG_IMAGE;
if (match(0xFF, 0xD8, 0xFF, 0xE0))
return JPEG;
if (match(0377, 0330, 0377, 0356))
return JPG;
if (match('8', 'B', 'P', 'S'))
return PSHOP8;
if (match(172, 237, 0, 5))
return ZIP;
return TYPENOTFOUND;
}
private void init() {
add(TYPENOTFOUND, "TYPENOTFOUND");
add(UUENCODED, "UUENCODED");
add(BTOAD, "BTOAD");
add(PBM, "PBM");
add(PGM, "PGM");
add(PPM, "PPM");
add(PBM_RAWBITS, "PBM_RAWBITS");
add(PGM_RAWBITS, "PGM_RAWBITS");
add(PPM_RAWBITS, "PPM_RAWBITS");
add(MGR_BITMAP, "MGR_BITMAP");
add(GIF87a, "GIF87a");
add(GIF89a, "GIF89a");
add(IFF_ILBM, "IFF_ILBM");
add(SUNRASTER, "SUNRASTER");
add(SGI_IMAGE, "SGI_IMAGE");
add(CMU_WINDOW_MANAGER_BITMAP, "CMU_WINDOW_MANAGER_BITMAP");
add(SUN, "SUN");
add(TIFF_BIG_ENDIAN, "TIFF_BIG_ENDIAN");
add(TIFF_LITTLE_ENDIAN, "TIFF_LITTLE_ENDIAN");
add(FLI, "FLI");
add(MPEG, "MPEG");
add(SUN_NEXT_AUDIO, "SUN_NEXT_AUDIO");
add(STANDARD_MIDI, "STANDARD_MIDI");
add(MICROSOFT_RIFF, "MICROSOFT_RIFF");
add(BZIP, "BZIP");
add(IFF_DATA, "IFF_DATA");
add(NIFF_IMAGE, "NIFF_IMAGE");
add(PC_BITMAP, "PC_BITMAP");
add(PDF_DOCUMENT, "PDF_DOCUMENT");
add(POSTSCRIPT_DOCUMENT, "POSTSCRIPT_DOCUMENT");
add(SILICON_GRAPHICS_MOVIE, "SILICON_GRAPHICS_MOVIE");
add(APPLE_QUICKTIME_MOVIE, "APPLE_QUICKTIME_MOVIE");
add(ZIP_ARCHIVE, "ZIP_ARCHIVE");
add(UNIX_COMPRESS, "UNIX_COMPRESS");
add(GZIP, "GZIP");
add(HUFFMAN, "HUFFMAN");
add(PNG_IMAGE, "PNG_IMAGE");
add(JPEG, "JPEG");
add(JPG, "JPG");
add(PSHOP8, "Photo Shop...8 bits per pel");
add(ZIP, "Zip file...Wavelet encoded image sequence?");
}
protected void add(int i, String s) {
h.put(new Integer(i), s);
}
public String getStringForId(int id) {
return (String) h.get(new Integer(id));
}
public static final int TYPENOTFOUND = 0;
public static final int UUENCODED = 1;
public static final int BTOAD = 2;
public static final int PBM = 3;
public static final int PGM = 4;
public static final int PPM = 5;
public static final int PBM_RAWBITS = 6;
public static final int PGM_RAWBITS = 7;
public static final int PPM_RAWBITS = 8;
public static final int MGR_BITMAP = 9;
public static final int GIF87a = 10;
public static final int GIF89a = 11;
public static final int IFF_ILBM = 12;
public static final int SUNRASTER = 13;
public static final int SGI_IMAGE = 14;
public static final int CMU_WINDOW_MANAGER_BITMAP = 15;
public static final int SUN = 16;
public static final int TIFF_BIG_ENDIAN = 17;
public static final int TIFF_LITTLE_ENDIAN = 18;
public static final int FLI = 19;
public static final int MPEG = 20;
public static final int SUN_NEXT_AUDIO = 21;
public static final int STANDARD_MIDI = 22;
public static final int MICROSOFT_RIFF = 23;
public static final int BZIP = 24;
public static final int IFF_DATA = 25;
public static final int NIFF_IMAGE = 26;
public static final int PC_BITMAP = 27;
public static final int PDF_DOCUMENT = 28;
public static final int POSTSCRIPT_DOCUMENT = 29;
public static final int SILICON_GRAPHICS_MOVIE = 30;
public static final int APPLE_QUICKTIME_MOVIE = 31;
public static final int ZIP_ARCHIVE = 32;
public static final int UNIX_COMPRESS = 33;
public static final int GZIP = 34;
public static final int HUFFMAN = 35;
public static final int PNG_IMAGE = 38;
public static final int JPEG = 39;
public static final int JPG = 40;
public static final int PSHOP8 = 41;
public static final int ZIP = 42;
protected Hashtable h = new Hashtable();
}