Maybe this is a problem of language. Here's what you say the rule should do:
'After receiving a fact "MyModel" wich name != "aaa", if arrives another
with same ip and different id after a period between 0 and 5 minutes the
rule have to retract the last one and keep the first fact (the older one)'
Which I would interpret as "Event 1 comes in, then event 2 comes in between 0
and 5 minutes later." Does that sound right?
And here's the rule that you think fits the requirements:
rule "SnortRule"
salience 2
dialect "mvel"
when
$s1 : Snort( sig_name != "(portscan) Open Port") from entry-point
"Correlator"
$s2 : Snort( sig_name != "(portscan) Open Port" , id != $s1.id, ip_dst
== $s1.ip_dst, this after [5m] $s1) from entry-point "Correlator"
then
System.out.println("****************** Snort Alert!!!!" +
$s1.getData());
retract($s1);
end
Check out the docs, though:
https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-fusion/html_single/index.html#d0e622
The after operator in this case would check that (5m <= $s2.startTimestamp -
$s1.endTimeStamp <= +infinity).
So the rule actually implements "Event 1 comes in, then event 2 happens at leat
5 minutes later."
If you use the second argument of after I think it would work:
$s2 : Snort( sig_name != "(portscan) Open Port" , id != $s1.id, ip_dst ==
$s1.ip_dst, this after [0m,5m] $s1) from entry-point "Correlator"
According to the docs this should check that (0m <= $s2.startTimestamp -
$s1.endTimeStamp <= 5m).
You could alternately use "overlaps". Place an @duration(5m) annotation on the
Snort declaration and try this condition:
$s2 : Snort( sig_name != "(portscan) Open Port" , id != $s1.id, ip_dst ==
$s1.ip_dst, this overlaps $s1) from entry-point "Correlator"
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