How to use

toInt

method

in

org.apache.mina.filter.firewall.Subnet

/**
 * Converts an IP address to a subnet using the provided 
 * mask
 * @param address The address to convert into a subnet
 * @return The subnet as an integer
 */
private int toSubnet(InetAddress address) {
  return toInt(address) & subnetMask;
}

/**
 * Converts an IP address to a subnet using the provided mask
 * 
 * @param address
 *            The address to convert into a subnet
 * @return The subnet as an integer
 */
private long toSubnet(InetAddress address) {
  if (address instanceof Inet4Address) {
    return toInt(address) & (int) subnetMask;
  } else {
    return toLong(address) & subnetMask;
  }
}

/**
 * Creates a subnet from CIDR notation. For example, the subnet
 * 192.168.0.0/24 would be created using the {@link InetAddress}  
 * 192.168.0.0 and the mask 24.
 * @param subnet The {@link InetAddress} of the subnet
 * @param mask The mask
 */
public Subnet(InetAddress subnet, int mask) {
  if(subnet == null) {
    throw new NullPointerException("Subnet address can not be null");
  }
  if(!(subnet instanceof Inet4Address)) {
    throw new IllegalArgumentException("Only IPv4 supported");
  }
  if(mask < 0 || mask > 32) {
    throw new IllegalArgumentException("Mask has to be an integer between 0 and 32");
  }
  
  this.subnet = subnet;
  this.subnetInt = toInt(subnet);
  this.suffix = mask;
  
  // binary mask for this subnet
  this.subnetMask = IP_MASK >> (mask - 1);
}

/**
 * Converts an IP address to a subnet using the provided mask
 * 
 * @param address
 *            The address to convert into a subnet
 * @return The subnet as an integer
 */
private long toSubnet(InetAddress address) {
  if (address instanceof Inet4Address) {
    return toInt(address) & (int) subnetMask;
  } else {
    return toLong(address) & subnetMask;
  }
}

} else {
  this.subnet = subnet;
  subnetInt = toInt(subnet);
  this.suffix = mask;

} else {
  this.subnet = subnet;
  subnetInt = toInt(subnet);
  this.suffix = mask;