package net.i2p.data.i2cp;
/*
* free (adj.): unencumbered; not under the control of others
* Written by jrandom in 2003 and released into the public domain
* with no warranty of any kind, either expressed or implied.
* It probably won't make your computer catch on fire, or eat
* your children, but it might. Use at your own risk.
*
*/
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import net.i2p.data.DataFormatException;
import net.i2p.data.DataHelper;
/**
* Defines the message a client sends to a router when asking the
* router to start sending a message to it.
*
* @author jrandom
*/
public class ReceiveMessageBeginMessage extends I2CPMessageImpl {
public final static int MESSAGE_TYPE = 6;
private int _sessionId;
private long _messageId;
public ReceiveMessageBeginMessage() {
_sessionId = -1;
_messageId = -1;
}
public long getSessionId() {
return _sessionId;
}
/**
* Return the SessionId for this message.
*
* @since 0.9.21
*/
@Override
public SessionId sessionId() {
return _sessionId >= 0 ? new SessionId(_sessionId) : null;
}
/** @param id 0-65535 */
public void setSessionId(long id) {
_sessionId = (int) id;
}
public long getMessageId() {
return _messageId;
}
public void setMessageId(long id) {
_messageId = id;
}
@Override
protected void doReadMessage(InputStream in, int size) throws I2CPMessageException, IOException {
try {
_sessionId = (int) DataHelper.readLong(in, 2);
_messageId = DataHelper.readLong(in, 4);
} catch (DataFormatException dfe) {
throw new I2CPMessageException("Unable to load the message data", dfe);
}
}
@Override
protected byte[] doWriteMessage() throws I2CPMessageException, IOException {
throw new UnsupportedOperationException("This shouldn't be called... use writeMessage(out)");
}
/**
* Override to reduce mem churn
* @throws IOException
*/
@Override
public void writeMessage(OutputStream out) throws I2CPMessageException, IOException {
int len = 2 + // sessionId
4; // messageId
try {
DataHelper.writeLong(out, 4, len);
out.write((byte) MESSAGE_TYPE);
DataHelper.writeLong(out, 2, _sessionId);
DataHelper.writeLong(out, 4, _messageId);
} catch (DataFormatException dfe) {
throw new I2CPMessageException("Unable to write the message length or type", dfe);
}
}
public int getType() {
return MESSAGE_TYPE;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("[ReceiveMessageBeginMessage: ");
buf.append("\n\tSessionId: ").append(_sessionId);
buf.append("\n\tMessageId: ").append(_messageId);
buf.append("]");
return buf.toString();
}
}