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/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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.jboss.netty.handler.ipfilter;
import org.jboss.netty.logging.InternalLogger;
import org.jboss.netty.logging.InternalLoggerFactory;
import org.jboss.netty.util.internal.StringUtil;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Pattern;
/**
* The Class PatternRule represents an IP filter rule using string patterns.
*
* Rule Syntax:
*
*
* Rule ::= [n|i]:address n stands for computer name, i for ip address
* address ::= <regex> | localhost
* regex is a regular expression with '*' as multi character and '?' as single character wild card
*
*
* Example: allow localhost:
*
* new PatternRule(true, "n:localhost")
*
* Example: allow local lan:
*
* new PatternRule(true, "i:192.168.0.*")
*
* Example: block all
*
* new PatternRule(false, "n:*")
*
*/
public class PatternRule implements IpFilterRule, Comparable