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package org.bouncycastle.crypto.tls.test;
import java.io.IOException;
import java.io.PrintStream;
import org.bouncycastle.crypto.tls.DatagramTransport;
public class LoggingDatagramTransport
implements DatagramTransport
{
private static final String HEX_CHARS = "0123456789ABCDEF";
private final DatagramTransport transport;
private final PrintStream output;
private final long launchTimestamp;
public LoggingDatagramTransport(DatagramTransport transport, PrintStream output)
{
this.transport = transport;
this.output = output;
this.launchTimestamp = System.currentTimeMillis();
}
public int getReceiveLimit()
throws IOException
{
return transport.getReceiveLimit();
}
public int getSendLimit()
throws IOException
{
return transport.getSendLimit();
}
public int receive(byte[] buf, int off, int len, int waitMillis)
throws IOException
{
int length = transport.receive(buf, off, len, waitMillis);
if (length >= 0)
{
dumpDatagram("Received", buf, off, length);
}
return length;
}
public void send(byte[] buf, int off, int len)
throws IOException
{
dumpDatagram("Sending", buf, off, len);
transport.send(buf, off, len);
}
public void close()
throws IOException
{
}
private void dumpDatagram(String verb, byte[] buf, int off, int len)
throws IOException
{
long timestamp = System.currentTimeMillis() - launchTimestamp;
StringBuffer sb = new StringBuffer("(+" + timestamp + "ms) " + verb + " " + len + " byte datagram:");
for (int pos = 0; pos < len; ++pos)
{
if (pos % 16 == 0)
{
sb.append(System.getProperty("line.separator"));
sb.append(" ");
}
else if (pos % 16 == 8)
{
sb.append('-');
}
else
{
sb.append(' ');
}
int val = buf[off + pos] & 0xFF;
sb.append(HEX_CHARS.charAt(val >> 4));
sb.append(HEX_CHARS.charAt(val & 0xF));
}
dump(sb.toString());
}
private synchronized void dump(String s)
{
output.println(s);
}
}
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