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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.security.access.plugins.network;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.regex.Pattern;
import org.apache.commons.configuration.Configuration;
import org.apache.qpid.server.protocol.AMQMinaProtocolSession;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.security.access.plugins.AbstractACLPlugin;
import org.apache.qpid.server.virtualhost.VirtualHost;
import org.apache.qpid.util.NetMatcher;
import sun.net.util.IPAddressUtil;
public class FirewallPlugin extends AbstractACLPlugin
{
public class FirewallRule
{
private AuthzResult _access;
private NetMatcher _network;
private Pattern _hostnamePattern;
public FirewallRule(String access, String network, String hostname)
{
_access = (access.equals("allow")) ? AuthzResult.ALLOWED : AuthzResult.DENIED;
_network = (network != null) ? new NetMatcher(new String[]{network}) : null;
_hostnamePattern = (hostname != null) ? Pattern.compile(hostname) : null;
}
public boolean match(InetAddress remote)
{
if (_hostnamePattern != null)
{
return _hostnamePattern.matcher(remote.getCanonicalHostName()).matches();
}
else
{
return _network.matchInetNetwork(remote);
}
}
public AuthzResult getAccess()
{
return _access;
}
}
private AuthzResult _default = AuthzResult.ABSTAIN;
private FirewallRule[] _rules;
@Override
public AuthzResult authoriseConnect(AMQProtocolSession session, VirtualHost virtualHost)
{
if (!(session instanceof AMQMinaProtocolSession))
{
return AuthzResult.ABSTAIN; // We only deal with tcp sessions, which mean MINA right now
}
InetAddress addr = getInetAdressFromMinaSession((AMQMinaProtocolSession) session);
if (addr == null)
{
return AuthzResult.ABSTAIN; // Not an Inet socket on the other end
}
boolean match = false;
for (FirewallRule rule : _rules)
{
match = rule.match(addr);
if (match)
{
return rule.getAccess();
}
}
return _default;
}
private InetAddress getInetAdressFromMinaSession(AMQMinaProtocolSession session)
{
SocketAddress remote = session.getIOSession().getRemoteAddress();
if (remote instanceof InetSocketAddress)
{
return ((InetSocketAddress) remote).getAddress();
}
else
{
return null;
}
}
@Override
public void setConfiguration(Configuration config)
{
// Get default action
String defaultAction = config.getString("[@default-action]");
if (defaultAction == null) {
_default = AuthzResult.ABSTAIN;
}
else if (defaultAction.toLowerCase().equals("allow"))
{
_default = AuthzResult.ALLOWED;
}
else
{
_default = AuthzResult.DENIED;
}
int numRules = config.getList("rule[@access]").size(); // all rules must
// have an access
// attribute
_rules = new FirewallRule[numRules];
for (int i = 0; i < numRules; i++)
{
FirewallRule rule = new FirewallRule((String) config.getProperty("rule(" + i + ")[@access]"),
(String) config.getProperty("rule(" + i + ")[@network]"), (String) config.getProperty("rule(" + i
+ ")[@hostname]"));
_rules[i] = rule;
}
}
}
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