com.groiss.util
Class IPChecker

java.lang.Object
  com.groiss.util.IPChecker

public class IPChecker
extends java.lang.Object

IPChecker allows to check IP Addresses with respect to the allow/deny patterns specified in the configuration. Works only with IPV4 adress formats.

Constructor Summary

IPChecker(java.lang.String allowPattern, java.lang.String denyPattern)

Method Summary

boolean	accessAllowed(byte[] rawIPAddress) Determines whether access from the rawIPAddress is allowed.
boolean	accessAllowed(java.net.InetAddress inetAddress) Checks if the specified InetAdress has permission to access.
boolean	accessAllowed(java.net.Socket socket) Checks if a (connection from a) socket has permission to access.
boolean	accessAllowed(java.lang.String hostName) Checks if the host with the specified name has the permission to access.
static IPChecker	getConfiguredIPChecker() Returns an IPChecker which is initializes with the patterns from the configuration

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IPChecker

public IPChecker(java.lang.String allowPattern,
                 java.lang.String denyPattern)

Method Detail

getConfiguredIPChecker

public static IPChecker getConfiguredIPChecker()

Returns an IPChecker which is initializes with the patterns from the configuration

Returns:

the IPChecker according to the configuration

accessAllowed

public boolean accessAllowed(java.lang.String hostName)

Checks if the host with the specified name has the permission to access.

Parameters:

hostName - the name or string IP representation.

Returns:

true if the host name is known and is allowed to access.

accessAllowed

public boolean accessAllowed(java.net.InetAddress inetAddress)

Checks if the specified InetAdress has permission to access.

Parameters:

inetAddress - the InetAdress to check access for.

Returns:

true if the InetAdress is allowed to access.

accessAllowed

public boolean accessAllowed(java.net.Socket socket)

Checks if a (connection from a) socket has permission to access.

Parameters:

socket - the Socket to check access for.

Returns:

true if the connection from the socket is allowed to access.

accessAllowed

public boolean accessAllowed(byte[] rawIPAddress)

Determines whether access from the rawIPAddress is allowed. Checks first the allow list, then the deny list. No allow list means all hosts are allowed, no deny list no hosts are denied. match of address is done as follows: if (address XOR host-mask) AND net-mask is 0 then access is denied example: address: 10.205.112.5 mask: 10.205.112.0 XOR: 0. 0. 0.5 netmask: 255.255.255.0 AND 0. 0. 0.0

Parameters:

rawIPAddress - the raw IP Adress to check access for. See InetAdress.getAddress().

Returns:

true if the rawIPAdress is allowed to access.