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.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import net.i2p.data.DataFormatException;
import net.i2p.data.DataHelper;
import net.i2p.data.Hash;
import net.i2p.data.TunnelId;
/**
* Defines the message a router sends to a client to request that
* a leaseset be created and signed. The reply is a CreateLeaseSetMessage.
*
* @author jrandom
*/
public class RequestLeaseSetMessage extends I2CPMessageImpl {
private static final long serialVersionUID = 1L;
public final static int MESSAGE_TYPE = 21;
private SessionId _sessionId;
// ArrayList is Serializable, List is not
private final ArrayList<TunnelEndpoint> _endpoints;
private Date _end;
public RequestLeaseSetMessage() {
_endpoints = new ArrayList<TunnelEndpoint>();
}
public SessionId getSessionId() {
return _sessionId;
}
/**
* Return the SessionId for this message.
*
* @since 0.9.21
*/
@Override
public SessionId sessionId() {
return _sessionId;
}
public void setSessionId(SessionId id) {
_sessionId = id;
}
public int getEndpoints() {
return _endpoints.size();
}
public Hash getRouter(int endpoint) {
if ((endpoint < 0) || (_endpoints.size() <= endpoint)) return null;
return _endpoints.get(endpoint).getRouter();
}
public TunnelId getTunnelId(int endpoint) {
if ((endpoint < 0) || (_endpoints.size() <= endpoint)) return null;
return _endpoints.get(endpoint).getTunnelId();
}
/** @deprecated unused - presumably he meant remove? */
@Deprecated
public void remoteEndpoint(int endpoint) {
if ((endpoint >= 0) && (endpoint < _endpoints.size())) _endpoints.remove(endpoint);
}
public void addEndpoint(Hash router, TunnelId tunnel) {
if (router == null) throw new IllegalArgumentException("Null router (tunnel=" + tunnel +")");
if (tunnel == null) throw new IllegalArgumentException("Null tunnel (router=" + router +")");
_endpoints.add(new TunnelEndpoint(router, tunnel));
}
public Date getEndDate() {
return _end;
}
public void setEndDate(Date end) {
_end = end;
}
@Override
protected void doReadMessage(InputStream in, int size) throws I2CPMessageException, IOException {
try {
_sessionId = new SessionId();
_sessionId.readBytes(in);
int numTunnels = (int) DataHelper.readLong(in, 1);
_endpoints.clear();
for (int i = 0; i < numTunnels; i++) {
//Hash router = new Hash();
//router.readBytes(in);
Hash router = Hash.create(in);
TunnelId tunnel = new TunnelId();
tunnel.readBytes(in);
_endpoints.add(new TunnelEndpoint(router, tunnel));
}
_end = DataHelper.readDate(in);
} catch (DataFormatException dfe) {
throw new I2CPMessageException("Unable to load the message data", dfe);
}
}
@Override
protected byte[] doWriteMessage() throws I2CPMessageException, IOException {
if (_sessionId == null)
throw new I2CPMessageException("Unable to write out the message as there is not enough data");
ByteArrayOutputStream os = new ByteArrayOutputStream(256);
try {
_sessionId.writeBytes(os);
DataHelper.writeLong(os, 1, _endpoints.size());
for (int i = 0; i < _endpoints.size(); i++) {
Hash router = getRouter(i);
router.writeBytes(os);
TunnelId tunnel = getTunnelId(i);
tunnel.writeBytes(os);
}
DataHelper.writeDate(os, _end);
} catch (DataFormatException dfe) {
throw new I2CPMessageException("Error writing out the message data", dfe);
}
return os.toByteArray();
}
public int getType() {
return MESSAGE_TYPE;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("[RequestLeaseSetMessage: ");
buf.append("\n\tSessionId: ").append(getSessionId());
buf.append("\n\tTunnels:");
for (int i = 0; i < getEndpoints(); i++) {
buf.append("\n\t\tRouterIdentity: ").append(getRouter(i));
buf.append("\n\t\tTunnelId: ").append(getTunnelId(i));
}
buf.append("\n\tEndDate: ").append(getEndDate());
buf.append("]");
return buf.toString();
}
private static class TunnelEndpoint implements Serializable {
private static final long serialVersionUID = 1L;
private final Hash _router;
private final TunnelId _tunnelId;
public TunnelEndpoint(Hash router, TunnelId id) {
_router = router;
_tunnelId = id;
}
public Hash getRouter() {
return _router;
}
public TunnelId getTunnelId() {
return _tunnelId;
}
}
}