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/*
* AirportBaseStationConfigurator
*
* Copyright (C) 2000, Jonathan Sevy <jsevy@mcs.drexel.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package snmp;
import java.util.*;
import java.io.*;
/**
* Class to hold IP addresses; special case of SNMP Octet String.
*/
public class SNMPIPAddress extends SNMPOctetString
{
// length limited to 4 octets
protected byte tag = SNMPBERCodec.SNMPIPADDRESS;
/**
* Initialize to 0.0.0.0
*/
public SNMPIPAddress()
{
// initialize to 0.0.0.0
data = new byte[4];
for (int i = 0; i < 4; i++)
data[i] = 0;
}
/*
public SNMPIPAddress(String string)
throws SNMPBadValueException
{
if (string.length() == 4)
this.data = string.getBytes[];
else
throw new SNMPBadValueException(" IPAddress: bad length string supplied to set value ");
}
*/
/**
* Used to initialize from the BER encoding, as received in a response from
* an SNMP device responding to an SNMPGetRequest, or from a supplied byte array
* containing the address components.
* @throws SNMPBadValueException Indicates an invalid array supplied: must have length 4.
*/
public SNMPIPAddress(byte[] enc)
throws SNMPBadValueException
{
if (enc.length == 4)
{
data = enc;
}
else // wrong size
{
throw new SNMPBadValueException(" IPAddress: bad BER encoding supplied to set value ");
}
}
/**
* Used to set the value from a byte array containing the address.
* @throws SNMPBadValueException Indicates an incorrect object type supplied, or array of
* incorrect size.
*/
public void setValue(Object newAddress)
throws SNMPBadValueException
{
if ((newAddress instanceof byte[]) && (((byte[])newAddress).length == 4))
data = (byte[])newAddress;
else if (newAddress instanceof String)
{
data = parseIPAddress((String)newAddress);
}
else
throw new SNMPBadValueException(" IPAddress: bad data supplied to set value ");
}
/**
* Return pretty-printed IP address.
*/
public String toString()
{
String returnString = new String();
if (data.length > 0)
{
int convert = data[0];
if (convert < 0)
convert += 256;
returnString += convert;
for (int i = 1; i < data.length; i++)
{
convert = data[i];
if (convert < 0)
convert += 256;
returnString += "." + convert;
}
}
return returnString;
}
private byte[] parseIPAddress(String addressString)
throws SNMPBadValueException
{
try
{
StringTokenizer st = new StringTokenizer(addressString, " .");
int size = 0;
while (st.hasMoreTokens())
{
// figure out how many values are in string
size++;
st.nextToken();
}
if (size != 4)
{
throw new SNMPBadValueException(" IPAddress: wrong number of components supplied to set value ");
}
byte[] returnBytes = new byte[size];
st = new StringTokenizer(addressString, " .");
for (int i = 0; i < size; i++)
{
int addressComponent = (Integer.parseInt(st.nextToken()));
if ((addressComponent < 0) || (addressComponent > 255))
throw new SNMPBadValueException(" IPAddress: invalid component supplied to set value ");
returnBytes[i] = (byte)addressComponent;
}
return returnBytes;
}
catch (NumberFormatException e)
{
throw new SNMPBadValueException(" IPAddress: invalid component supplied to set value ");
}
}
}
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