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1 package net.sourceforge.jsocks;
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2
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3 /**
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4 Exception thrown by various socks classes to indicate errors
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5 with protocol or unsuccessful server responses.
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6 */
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7 public class SocksException extends java.io.IOException {
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8 private static final long serialVersionUID = 6141184566248512277L;
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9
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10 /**
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11 Construct a SocksException with given error code.
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12 <p>
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13 Tries to look up message which corresponds to this error code.
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14 @param errCode Error code for this exception.
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15 */
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16 public SocksException(int errCode) {
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17 this.errCode = errCode;
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18
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19 if ((errCode >> 16) == 0) {
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20 //Server reply error message
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21 errString = errCode <= serverReplyMessage.length ?
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22 serverReplyMessage[errCode] :
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23 UNASSIGNED_ERROR_MESSAGE;
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24 }
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25 else {
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26 //Local error
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27 errCode = (errCode >> 16) - 1;
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28 errString = errCode <= localErrorMessage.length ?
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29 localErrorMessage[errCode] :
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30 UNASSIGNED_ERROR_MESSAGE;
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31 }
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32 }
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33 /**
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34 Constructs a SocksException with given error code and message.
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35 @param errCode Error code.
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36 @param errString Error Message.
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37 */
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38 public SocksException(int errCode, String errString) {
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39 this.errCode = errCode;
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40 this.errString = errString;
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41 }
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42 /**
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43 Get the error code associated with this exception.
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44 @return Error code associated with this exception.
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45 */
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46 public int getErrorCode() {
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47 return errCode;
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48 }
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49 /**
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50 Get human readable representation of this exception.
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51 @return String represntation of this exception.
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52 */
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53 public String toString() {
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54 return errString;
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55 }
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56
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57 static final String UNASSIGNED_ERROR_MESSAGE =
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58 "Unknown error message";
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59 static final String serverReplyMessage[] = {
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60 "Succeeded",
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61 "General SOCKS server failure",
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62 "Connection not allowed by ruleset",
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63 "Network unreachable",
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64 "Host unreachable",
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65 "Connection refused",
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66 "TTL expired",
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67 "Command not supported",
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68 "Address type not supported"
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69 };
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70
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71 static final String localErrorMessage[] = {
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72 "SOCKS server not specified",
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73 "Unable to contact SOCKS server",
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74 "IO error",
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75 "None of Authentication methods are supported",
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76 "Authentication failed",
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77 "General SOCKS fault"
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78 };
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79
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80 String errString;
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81 public int errCode;
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82
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83 }//End of SocksException class
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84
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