net.sourceforge.jtds.ssl
Class TdsTlsInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          net.sourceforge.jtds.ssl.TdsTlsInputStream

class TdsTlsInputStream

extends java.io.FilterInputStream

An input stream that filters out TDS headers so they are not returned to JSSE (which will not recognize them).

Version:

$Id: TdsTlsInputStream.java,v 1.5 2005/10/20 09:46:38 alin_sinpalean Exp $

Author:

Rob Worsnop, Mike Hutchinson

Field Summary

(package private) java.io.InputStream	bufferStream
(package private) int	bytesOutstanding
(package private) boolean	pureSSL False if TLS packets are encapsulated in TDS packets.
(package private) byte[]	readBuffer Temporary buffer used to de-encapsulate inital TLS packets.

Fields inherited from class java.io.FilterInputStream

in

Fields inherited from class java.io.InputStream

Constructor Summary

TdsTlsInputStream(java.io.InputStream in)
Constructs a TdsTlsInputStream and bases it on an underlying stream.

Method Summary

private void	primeBuffer() Read in entire TLS record or TDS packet and store the TLS record in the buffer.
int	read(byte[] b, int off, int len)
private void	readFully(byte[] b, int off, int len) Reads len bytes or throws an IOException if there aren't that many bytes available.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

bytesOutstanding

int bytesOutstanding

readBuffer

final byte[] readBuffer

Temporary buffer used to de-encapsulate inital TLS packets. Initial size should be enough for login phase after which no buffering is required.

bufferStream

java.io.InputStream bufferStream

pureSSL

boolean pureSSL

False if TLS packets are encapsulated in TDS packets.

Constructor Detail

TdsTlsInputStream

public TdsTlsInputStream(java.io.InputStream in)

Constructs a TdsTlsInputStream and bases it on an underlying stream.

Parameters:

in - the underlying stream

Method Detail

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Throws:

java.io.IOException

primeBuffer

private void primeBuffer()
                  throws java.io.IOException

Read in entire TLS record or TDS packet and store the TLS record in the buffer. (TDS packets will always contain a TLS record.)

Throws:

java.io.IOException

readFully

private void readFully(byte[] b,
                       int off,
                       int len)
                throws java.io.IOException

Reads len bytes or throws an IOException if there aren't that many bytes available.

Parameters:

b - buffer to read into

off - offset in the buffer where to start storing

len - amount of data to read

Throws:

java.io.IOException - if an I/O error occurs or not enough data is available