1 | package nu.fw.jeti.plugins.filetransfer.socks5.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 e = all.elements(); |
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223 | while(e.hasMoreElements()){ |
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224 | Object[] entry = (Object[]) e.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 e = all.elements(); |
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264 | while(e.hasMoreElements()){ |
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265 | Object[] obj = (Object[]) e.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 e = end_names.elements(); |
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280 | while(e.hasMoreElements()){ |
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281 | if(host.endsWith((String) e.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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303 | } |
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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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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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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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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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350 | }catch(NumberFormatException nfe){ |
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351 | return null; |
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352 | } |
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353 | |
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354 | } |
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355 | return address; |
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356 | } |
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357 | |
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358 | |
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359 | /* |
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360 | //* This was the test main function |
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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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366 | InetRange ir = new InetRange(); |
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367 | |
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368 | |
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369 | for(i=0;i<args.length;++i){ |
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370 | System.out.println("Adding:" + args[i]); |
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371 | ir.add(args[i]); |
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372 | } |
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373 | |
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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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377 | host = din.readLine(); |
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378 | while(host!=null){ |
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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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381 | }else{ |
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382 | System.out.println(host+" is not in the range"); |
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383 | } |
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384 | host = din.readLine(); |
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385 | } |
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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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389 | } |
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390 | ********************/ |
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391 | |
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392 | class InetRangeResolver implements Runnable{ |
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393 | |
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394 | Object[] entry; |
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395 | |
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396 | String from, to; |
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397 | |
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398 | InetRangeResolver(Object[] entry){ |
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399 | this.entry = entry; |
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400 | from = to = null; |
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401 | } |
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402 | InetRangeResolver(Object[] entry,String from,String to){ |
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403 | this.entry = entry; |
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404 | this.from = from; |
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405 | this.to = to; |
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406 | } |
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407 | public final void resolve(){ |
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408 | resolve(true); |
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409 | } |
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410 | public final void resolve(boolean inSeparateThread){ |
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411 | if(inSeparateThread){ |
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412 | Thread t = new Thread(this); |
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413 | t.start(); |
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414 | }else |
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415 | run(); |
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416 | |
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417 | } |
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418 | public void run(){ |
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419 | try{ |
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420 | if(from == null){ |
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421 | InetAddress ip = InetAddress.getByName((String) entry[0]); |
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422 | entry[1] = ip; |
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423 | Long l = new Long(InetRange.ip2long(ip)); |
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424 | entry[2] = entry[3] = l; |
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425 | }else{ |
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426 | InetAddress f = InetAddress.getByName(from); |
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427 | InetAddress t = InetAddress.getByName(to); |
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428 | entry[2] = new Long(InetRange.ip2long(f)); |
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429 | entry[3] = new Long(InetRange.ip2long(t)); |
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430 | |
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431 | } |
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432 | }catch(UnknownHostException uhe){ |
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433 | //System.err.println("Resolve failed for "+from+','+to+','+entry[0]); |
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434 | } |
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435 | } |
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436 | |
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437 | } |
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438 | } |
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439 | |
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440 | |
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