com.limegroup.gnutella.filters
Class DuplicateFilter

java.lang.Object
  com.limegroup.gnutella.filters.SpamFilter
      com.limegroup.gnutella.filters.DuplicateFilter

public class DuplicateFilter

extends SpamFilter

A spam filter that tries to eliminate duplicate packets from overzealous users. Since requests are not traceable, we have to use the following heuristics:

• Two pings or queries are considered duplicates if they have similar GUID's, arrived within M messages of each other, and arrived not more than T seconds apart.
• Two queries are considered duplicates if they have the same query string, arrived within ~N seconds of each other, and have the same hops counts.

It would also be possible to special-case hops counts of zero.

Constructor Summary

DuplicateFilter()

Method Summary

boolean	allow(Message m) Returns true iff this is considered spam and should not be processed.
boolean	allowGUID(Message m)
boolean	allowQuery(QueryRequest qr)

Methods inherited from class com.limegroup.gnutella.filters.SpamFilter

newPersonalFilter, newRouteFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

DuplicateFilter

public DuplicateFilter()

Method Detail

allow

public boolean allow(Message m)

Description copied from class: SpamFilter

Returns true iff this is considered spam and should not be processed.

Specified by:

allow in class SpamFilter

allowGUID

public boolean allowGUID(Message m)

allowQuery

public boolean allowQuery(QueryRequest qr)