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annotate src/net/sourceforge/jsocks/InetRange.java @ 418:39533be5cbe9

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remove unneeded catch
author Carl Byington <carl@five-ten-sg.com>
date Wed, 29 Oct 2014 13:28:59 -0700
parents 205ee2873330
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package net.sourceforge.jsocks;
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2 import java.net.InetAddress;
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3 import java.net.UnknownHostException;
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4 import java.util.*;
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5
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6 /**
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7 * Class InetRange provides the means of defining the range of inetaddresses.
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8 * It's used by Proxy class to store and look up addresses of machines, that
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9 * should be contacted directly rather then through the proxy.
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10 * <P>
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11 * InetRange provides several methods to add either standalone addresses, or
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12 * ranges (e.g. 100.200.300.0:100.200.300.255, which covers all addresses
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13 * on on someones local network). It also provides methods for checking wether
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14 * given address is in this range. Any number of ranges and standalone
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15 * addresses can be added to the range.
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16 */
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17 public class InetRange implements Cloneable{
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18
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19 Hashtable host_names;
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20 Vector all;
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21 Vector end_names;
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22
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23 boolean useSeparateThread = true;
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24
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25 /**
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26 * Creates the empty range.
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27 */
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28 public InetRange(){
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29 all = new Vector();
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30 host_names = new Hashtable();
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31 end_names = new Vector();
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32 }
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33
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34 /**
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35 * Adds another host or range to this range.
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36 The String can be one of those:
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37 <UL>
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38 <li> Host name. eg.(Athena.myhost.com or 45.54.56.65)
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39
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40 <li> Range in the form .myhost.net.au <BR>
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41 In which case anything that ends with .myhost.net.au will
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42 be considered in the range.
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43
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44 <li> Range in the form ddd.ddd.ddd. <BR>
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45 This will be treated as range ddd.ddd.ddd.0 to ddd.ddd.ddd.255.
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46 It is not necessary to specify 3 first bytes you can use just
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47 one or two. For example 130. will cover address between 130.0.0.0
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48 and 13.255.255.255.
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49
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50 <li> Range in the form host_from[: \t\n\r\f]host_to. <br>
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51 That is two hostnames or ips separated by either whitespace
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52 or colon.
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53 </UL>
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54 */
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55 public synchronized boolean add(String s){
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56 if(s == null) return false;
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57
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58 s = s.trim();
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59 if(s.length() == 0) return false;
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60
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61 Object[] entry;
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62
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63 if(s.charAt(s.length()-1) == '.'){
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64 //thing like: 111.222.33.
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65 //it is being treated as range 111.222.33.000 - 111.222.33.255
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66
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67 int[] addr = ip2intarray(s);
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68 long from,to;
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69 from = to = 0;
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70
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71 if(addr == null) return false;
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72 for(int i = 0; i< 4;++i){
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73 if(addr[i]>=0)
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74 from += (((long)addr[i]) << 8*(3-i));
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75 else{
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76 to = from;
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77 while(i<4)
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78 to += 255l << 8*(3-i++);
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79 break;
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80 }
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81 }
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82 entry = new Object[] {s,null,new Long(from),new Long(to)};
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83 all.addElement(entry);
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84
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85 }else if(s.charAt(0) == '.'){
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86 //Thing like: .myhost.com
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87
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88 end_names.addElement(s);
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89 all.addElement(new Object[]{s,null,null,null});
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90 }else{
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91 StringTokenizer tokens = new StringTokenizer(s," \t\r\n\f:");
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92 if(tokens.countTokens() > 1){
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93 entry = new Object[] {s,null,null,null};
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94 resolve(entry,tokens.nextToken(),tokens.nextToken());
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95 all.addElement(entry);
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96 }else{
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97 entry = new Object[] {s,null,null,null};
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98 all.addElement(entry);
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99 host_names.put(s,entry);
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100 resolve(entry);
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101 }
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102
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103 }
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104
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105 return true;
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106 }
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107
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108 /**
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109 * Adds another ip for this range.
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110 @param ip IP os the host which should be added to this range.
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111 */
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112 public synchronized void add(InetAddress ip){
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113 long from, to;
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114 from = to = ip2long(ip);
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115 all.addElement(new Object[]{ip.getHostName(),ip,new Long(from),
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116 new Long(to)});
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117 }
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118
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119 /**
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120 * Adds another range of ips for this range.Any host with ip address
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121 greater than or equal to the address of from and smaller than or equal
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122 to the address of to will be included in the range.
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123 @param from IP from where range starts(including).
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124 @param to IP where range ends(including).
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125 */
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126 public synchronized void add(InetAddress from,InetAddress to){
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127 all.addElement(new Object[]{from.getHostAddress()+":"+to.getHostAddress()
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128 ,null,new Long(ip2long(from)),
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129 new Long(ip2long(to))});
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130 }
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131
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132 /**
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133 * Checks wether the givan host is in the range. Attempts to resolve
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134 host name if required.
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135 @param host Host name to check.
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136 @return true If host is in the range, false otherwise.
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137 * @see InetRange#contains(String,boolean)
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138 */
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139 public synchronized boolean contains(String host){
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140 return contains(host,true);
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141 }
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142
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143 /**
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144 * Checks wether the given host is in the range.
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145 * <P>
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146 * Algorithm: <BR>
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147 * <ol>
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148 * <li>Look up if the hostname is in the range (in the Hashtable).
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149 * <li>Check if it ends with one of the speciefied endings.
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150 * <li>Check if it is ip(eg.130.220.35.98). If it is check if it is
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151 * in the range.
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152 * <li>If attemptResolve is true, host is name, rather than ip, and
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153 * all previous attempts failed, try to resolve the hostname, and
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154 * check wether the ip associated with the host is in the range.It
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155 * also repeats all previos steps with the hostname obtained from
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156 * InetAddress, but the name is not allways the full name,it is
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157 * quite likely to be the same. Well it was on my machine.
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158 * </ol>
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159 @param host Host name to check.
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160 @param attemptResolve Wether to lookup ip address which corresponds
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161 to the host,if required.
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162 @return true If host is in the range, false otherwise.
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163 */
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164 public synchronized boolean contains(String host,boolean attemptResolve){
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165 if(all.size() ==0) return false; //Empty range
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166
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167 host = host.trim();
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168 if(host.length() == 0) return false;
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169
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170 if(checkHost(host)) return true;
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171 if(checkHostEnding(host)) return true;
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172
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173 long l = host2long(host);
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174 if(l >=0) return contains(l);
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175
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176 if(!attemptResolve) return false;
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177
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178 try{
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179 InetAddress ip = InetAddress.getByName(host);
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180 return contains(ip);
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181 }catch(UnknownHostException uhe){
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182
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183 }
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184
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185 return false;
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186 }
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187
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188 /**
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189 * Checks wether the given ip is in the range.
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190 @param ip Address of the host to check.
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191 @return true If host is in the range, false otherwise.
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192 */
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193 public synchronized boolean contains(InetAddress ip){
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194 if(checkHostEnding(ip.getHostName())) return true;
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195 if(checkHost(ip.getHostName())) return true;
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196 return contains(ip2long(ip));
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197 }
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198 /**
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199 Get all entries in the range as strings. <BR>
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200 These strings can be used to delete entries from the range
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201 with remove function.
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202 @return Array of entries as strings.
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203 @see InetRange#remove(String)
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204 */
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205 public synchronized String[] getAll(){
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206 int size = all.size();
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207 Object entry[];
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208 String all_names[] = new String[size];
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209
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210 for(int i=0;i<size;++i){
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211 entry = (Object[]) all.elementAt(i);
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212 all_names[i] = (String) entry[0];
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213 }
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214 return all_names;
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215 }
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216 /**
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217 Removes an entry from this range.<BR>
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218 @param s Entry to remove.
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219 @return true if successfull.
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220 */
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221 public synchronized boolean remove(String s){
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222 Enumeration eEnum = all.elements();
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223 while(eEnum.hasMoreElements()){
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224 Object[] entry = (Object[]) eEnum.nextElement();
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225 if(s.equals(entry[0])){
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226 all.removeElement(entry);
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227 end_names.removeElement(s);
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228 host_names.remove(s);
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229 return true;
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230 }
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231 }
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232 return false;
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233 }
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234
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235 /** Get string representaion of this Range.*/
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236 public String toString(){
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237 String all[] = getAll();
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238 if(all.length == 0) return "";
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239
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240 String s = all[0];
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241 for(int i=1;i<all.length;++i)
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242 s += "; "+all[i];
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243 return s;
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244 }
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245
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246 /** Creates a clone of this Object*/
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247 public Object clone(){
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248 InetRange new_range = new InetRange();
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249 new_range.all = (Vector)all.clone();
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250 new_range.end_names = (Vector) end_names.clone();
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251 new_range.host_names = (Hashtable)host_names.clone();
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252 return new_range;
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253 }
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254
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255
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256 //Private methods
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257 /////////////////
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258 /**
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259 * Same as previous but used internally, to avoid
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260 * unnecessary convertion of IPs, when checking subranges
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261 */
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262 private synchronized boolean contains(long ip){
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263 Enumeration eEnum = all.elements();
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264 while(eEnum.hasMoreElements()){
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265 Object[] obj = (Object[]) eEnum.nextElement();
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266 Long from = obj[2]==null?null:(Long)obj[2];
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267 Long to = obj[3]==null?null:(Long)obj[3];
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268 if(from != null && from.longValue()<= ip
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269 && to.longValue() >= ip) return true;
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270
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271 }
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272 return false;
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273 }
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274
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275 private boolean checkHost(String host){
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276 return host_names.containsKey(host);
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277 }
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278 private boolean checkHostEnding(String host){
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279 Enumeration eEnum = end_names.elements();
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280 while(eEnum.hasMoreElements()){
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281 if(host.endsWith((String) eEnum.nextElement())) return true;
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282 }
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283 return false;
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284 }
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285 private void resolve(Object[] entry){
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286 //First check if it's in the form ddd.ddd.ddd.ddd.
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287 long ip = host2long((String) entry[0]);
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288 if(ip >= 0){
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289 entry[2] = entry[3] = new Long(ip);
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290 }else{
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291 InetRangeResolver res = new InetRangeResolver(entry);
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292 res.resolve(useSeparateThread);
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293 }
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294 }
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295 private void resolve(Object[] entry,String from,String to){
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296 long f,t;
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297 if((f=host2long(from))>= 0 && (t=host2long(to)) >= 0){
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298 entry[2] = new Long(f);
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299 entry[3] = new Long(t);
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300 }else{
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301 InetRangeResolver res = new InetRangeResolver(entry,from,to);
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302 res.resolve(useSeparateThread);
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diff changeset
303 }
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parents:
diff changeset
304 }
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305
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306
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307
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308 //Class methods
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309 ///////////////
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310
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311 //Converts ipv4 to long value(unsigned int)
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312 ///////////////////////////////////////////
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313 static long ip2long(InetAddress ip){
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314 long l=0;
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Carl Byington <carl@five-ten-sg.com>
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315 byte[] addr = ip.getAddress();
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316
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317 if(addr.length ==4){ //IPV4
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318 for(int i=0;i<4;++i)
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319 l += (((long)addr[i] &0xFF) << 8*(3-i));
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320 }else{ //IPV6
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321 return 0; //Have no idea how to deal with those
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322 }
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323 return l;
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324 }
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325
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326
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327 long host2long(String host){
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328 long ip=0;
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329
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Carl Byington <carl@five-ten-sg.com>
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330 //check if it's ddd.ddd.ddd.ddd
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331 if(!Character.isDigit(host.charAt(0))) return -1;
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332
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333 int[] addr = ip2intarray(host);
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334 if(addr == null) return -1;
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335
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336 for(int i=0;i<addr.length;++i)
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337 ip += ((long)(addr[i]>=0 ? addr[i] : 0)) << 8*(3-i);
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338
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339 return ip;
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340 }
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341
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342 static int[] ip2intarray(String host){
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343 int[] address = {-1,-1,-1,-1};
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344 int i=0;
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Carl Byington <carl@five-ten-sg.com>
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345 StringTokenizer tokens = new StringTokenizer(host,".");
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346 if(tokens.countTokens() > 4) return null;
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347 while(tokens.hasMoreTokens()){
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348 try{
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349 address[i++] = Integer.parseInt(tokens.nextToken()) & 0xFF;
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Carl Byington <carl@five-ten-sg.com>
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350 }catch(NumberFormatException nfe){
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Carl Byington <carl@five-ten-sg.com>
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351 return null;
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Carl Byington <carl@five-ten-sg.com>
parents:
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352 }
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Carl Byington <carl@five-ten-sg.com>
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353
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Carl Byington <carl@five-ten-sg.com>
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354 }
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Carl Byington <carl@five-ten-sg.com>
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355 return address;
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Carl Byington <carl@five-ten-sg.com>
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356 }
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357
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358
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Carl Byington <carl@five-ten-sg.com>
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359 /*
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Carl Byington <carl@five-ten-sg.com>
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360 //* This was the test main function
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Carl Byington <carl@five-ten-sg.com>
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361 //**********************************
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362
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363 public static void main(String args[])throws UnknownHostException{
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364 int i;
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365
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Carl Byington <carl@five-ten-sg.com>
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366 InetRange ir = new InetRange();
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367
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368
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Carl Byington <carl@five-ten-sg.com>
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369 for(i=0;i<args.length;++i){
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Carl Byington <carl@five-ten-sg.com>
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370 System.out.println("Adding:" + args[i]);
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Carl Byington <carl@five-ten-sg.com>
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371 ir.add(args[i]);
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Carl Byington <carl@five-ten-sg.com>
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372 }
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373
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Carl Byington <carl@five-ten-sg.com>
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374 String host;
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375 java.io.DataInputStream din = new java.io.DataInputStream(System.in);
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376 try{
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Carl Byington <carl@five-ten-sg.com>
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377 host = din.readLine();
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Carl Byington <carl@five-ten-sg.com>
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378 while(host!=null){
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Carl Byington <carl@five-ten-sg.com>
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379 if(ir.contains(host)){
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380 System.out.println("Range contains ip:"+host);
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Carl Byington <carl@five-ten-sg.com>
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381 }else{
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382 System.out.println(host+" is not in the range");
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Carl Byington <carl@five-ten-sg.com>
parents:
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383 }
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Carl Byington <carl@five-ten-sg.com>
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384 host = din.readLine();
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Carl Byington <carl@five-ten-sg.com>
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385 }
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Carl Byington <carl@five-ten-sg.com>
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386 }catch(java.io.IOException io_ex){
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387 io_ex.printStackTrace();
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388 }
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Carl Byington <carl@five-ten-sg.com>
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389 }
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Carl Byington <carl@five-ten-sg.com>
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390 ********************/
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391
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392 }
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393
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394
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395 class InetRangeResolver implements Runnable{
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396
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397 Object[] entry;
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398
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Carl Byington <carl@five-ten-sg.com>
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399 String from, to;
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Carl Byington <carl@five-ten-sg.com>
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400
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401 InetRangeResolver(Object[] entry){
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402 this.entry = entry;
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
403 from = to = null;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
404 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
405 InetRangeResolver(Object[] entry,String from,String to){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
406 this.entry = entry;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
407 this.from = from;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
408 this.to = to;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
409 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
410 public final void resolve(){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
411 resolve(true);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
412 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
413 public final void resolve(boolean inSeparateThread){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
414 if(inSeparateThread){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
415 Thread t = new Thread(this);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
416 t.start();
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
417 }else
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
418 run();
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parents:
diff changeset
419
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
420 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
421 public void run(){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
422 try{
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
423 if(from == null){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
424 InetAddress ip = InetAddress.getByName((String) entry[0]);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
425 entry[1] = ip;
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
426 Long l = new Long(InetRange.ip2long(ip));
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
427 entry[2] = entry[3] = l;
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
428 }else{
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
429 InetAddress f = InetAddress.getByName(from);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
430 InetAddress t = InetAddress.getByName(to);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
431 entry[2] = new Long(InetRange.ip2long(f));
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
432 entry[3] = new Long(InetRange.ip2long(t));
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
433
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
434 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
435 }catch(UnknownHostException uhe){
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
436 //System.err.println("Resolve failed for "+from+','+to+','+entry[0]);
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
437 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
438 }
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
439
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
440 }