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Large update for the SumStats framework.

Browse source 
- On-demand access to sumstats results through "return from"
   functions named SumStats::request and Sumstats::request_key.
   Both functions are tested in standalone and clustered modes.

 - $name field has returned to SumStats which simplifies cluster
   code and makes the on-demand access stuff possible.

 - Clustered results can only be collected for 1 minute from their
   time of creation now instead of time of last read.

 - Thresholds use doubles instead of counts everywhere now.

 - Calculation dependency resolution occurs at start up time now
   instead of doing it at observation time which provide a minor
   cpu performance improvement.  A new plugin registration mechanism
   was created to support this change.

 - AppStats now has a minimal doc string and is broken into hook-based
   plugins.

 - AppStats and traceroute detection added to local.bro
This commit is contained in:
Seth Hall 2013-05-21 15:52:59 -04:00
parent 7d7d30e1f7
commit bec965b66f
34 changed files with 687 additions and 277 deletions
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10
scripts/base/frameworks/sumstats/plugins/variance.bro
View file

@ -1,5 +1,5 @@
@load ./average
@load base/frameworks/sumstats
@load ../main
module SumStats;
@ -28,17 +28,17 @@ function calc_variance(rv: ResultVal)
rv$variance = (rv$num > 1) ? rv$var_s/(rv$num-1) : 0.0;
}
# Reduced priority since this depends on the average
hook observe_hook(r: Reducer, val: double, obs: Observation, rv: ResultVal) &priority=-5
hook register_observe_plugins() &priority=-5
{
if ( VARIANCE in r$apply )
register_observe_plugin(VARIANCE, function(r: Reducer, val: double, obs: Observation, rv: ResultVal)
{
if ( rv$num > 1 )
rv$var_s += ((val - rv$prev_avg) * (val - rv$average));
calc_variance(rv);
rv$prev_avg = rv$average;
}
});
add_observe_plugin_dependency(VARIANCE, AVERAGE);
}
# Reduced priority since this depends on the average