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16 package org.jboss.netty.handler.ipfilter;
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18 import java.net.UnknownHostException;
19 import java.util.ArrayList;
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21 import org.jboss.netty.logging.InternalLogger;
22 import org.jboss.netty.logging.InternalLoggerFactory;
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46 public class IpFilterRuleList extends ArrayList<IpFilterRule> {
47 private static final long serialVersionUID = -6164162941749588780L;
48
49 private static final InternalLogger logger = InternalLoggerFactory.getInstance(IpFilterRuleList.class);
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56 public IpFilterRuleList(String rules) {
57 parseRules(rules);
58 }
59
60 private void parseRules(String rules) {
61 String[] ruless = rules.split(",");
62 for (String rule : ruless) {
63 parseRule(rule.trim());
64 }
65 }
66
67 private void parseRule(String rule) {
68 if (rule == null || rule.length() == 0) {
69 return;
70 }
71 if (!(rule.startsWith("+") || rule.startsWith("-"))) {
72 if (logger.isErrorEnabled()) {
73 logger.error("syntax error in ip filter rule:" + rule);
74 }
75 return;
76 }
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78 boolean allow = rule.startsWith("+");
79 if (rule.charAt(1) == 'n' || rule.charAt(1) == 'i') {
80 this.add(new PatternRule(allow, rule.substring(1)));
81 } else if (rule.charAt(1) == 'c') {
82 try {
83 this.add(new IpSubnetFilterRule(allow, rule.substring(3)));
84 } catch (UnknownHostException e) {
85 if (logger.isErrorEnabled()) {
86 logger.error("error parsing ip filter " + rule, e);
87 }
88 }
89 } else {
90 if (logger.isErrorEnabled()) {
91 logger.error("syntax error in ip filter rule:" + rule);
92 }
93 }
94 }
95 }