package org.jgroups.auth;
import org.jgroups.Address;
import org.jgroups.Event;
import org.jgroups.Message;
import org.jgroups.PhysicalAddress;
import org.jgroups.annotations.Property;
import org.jgroups.util.UUID;
import java.io.DataInput;
import java.io.DataOutput;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Matches the IP address or logical name of a joiner against a regular expression and accepts or rejects based on
* pattern matching
* @author Bela Ban
*/
public class RegexMembership extends AuthToken {
@Property(description="The regular expression against which the IP address or logical host of a joiner will be matched")
protected String match_string=null;
@Property(description="Matches the IP address of the joiner against the match string")
protected boolean match_ip_address=true;
@Property(description="Matches the logical name of the joiner against the match string")
protected boolean match_logical_name=false;
// ------------------------------------------- Fields ------------------------------------------------------ //
protected Pattern pattern;
public RegexMembership() {
}
public String getName() {
return "org.jgroups.auth.RegexMembership";
}
public void init() {
super.init();
if(!match_ip_address && !match_logical_name)
throw new IllegalArgumentException("either match_ip_address or match_logical_address has to be true");
if(match_string == null)
throw new IllegalArgumentException("match_string cannot be null");
pattern=Pattern.compile(match_string);
}
public boolean authenticate(AuthToken token, Message msg) {
Address sender=msg.getSrc();
if(match_ip_address) {
PhysicalAddress src=sender != null? (PhysicalAddress)auth.down(new Event(Event.GET_PHYSICAL_ADDRESS, sender)) : null;
String ip_addr=src != null? src.toString() : null;
if(ip_addr != null) {
Matcher matcher=pattern.matcher(ip_addr);
boolean result=matcher.matches();
if(log.isTraceEnabled())
log.trace("matching ip_address: pattern= " + pattern + ", input= " + ip_addr + ", result= " + result);
if(result)
return true;
}
}
if(match_logical_name) {
String logical_name=sender != null? UUID.get(sender) : null;
if(logical_name != null) {
Matcher matcher=pattern.matcher(logical_name);
boolean result=matcher.matches();
if(log.isTraceEnabled())
log.trace("matching logical_name: pattern= " + pattern + ", input= " + logical_name + ", result= " + result);
if(result)
return true;
}
}
return false;
}
public void writeTo(DataOutput out) throws Exception {
}
/**
* Required to deserialize the object when read in from the wire
*
*
* @param in
* @throws Exception
*/
public void readFrom(DataInput in) throws Exception {
}
public int size() {
return 0;
}
}