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Large update for the SumStats framework.

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- 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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81
scripts/policy/misc/app-stats/main.bro Normal file
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#! AppStats collects information about web applications in use
#! on the network.
@load base/protocols/http
@load base/protocols/ssl
@load base/frameworks/sumstats
module AppStats;
export {
redef enum Log::ID += { LOG };
type Info: record {
## Timestamp when the log line was finished and written.
ts: time &log;
## Time interval that the log line covers.
ts_delta: interval &log;
## The name of the "app", like "facebook" or "netflix".
app: string &log;
## The number of unique local hosts using the app.
uniq_hosts: count &log;
## The number of hits to the app in total.
hits: count &log;
## The total number of bytes received by users of the app.
bytes: count &log;
};
## The frequency of logging the stats collected by this script.
const break_interval = 15mins &redef;
}
redef record connection += {
resp_hostname: string &optional;
};
global add_sumstats: hook(id: conn_id, hostname: string, size: count);
event bro_init() &priority=3
{
Log::create_stream(AppStats::LOG, [$columns=Info]);
local r1: SumStats::Reducer = [$stream="apps.bytes", $apply=set(SumStats::SUM)];
local r2: SumStats::Reducer = [$stream="apps.hits", $apply=set(SumStats::UNIQUE)];
SumStats::create([$name="app-metrics",
$epoch=break_interval,
$reducers=set(r1, r2),
$epoch_finished(data: SumStats::ResultTable) =
{
local l: Info;
l$ts = network_time();
l$ts_delta = break_interval;
for ( key in data )
{
local result = data[key];
l$app = key$str;
l$bytes = double_to_count(floor(result["apps.bytes"]$sum));
l$hits = result["apps.hits"]$num;
l$uniq_hosts = result["apps.hits"]$unique;
Log::write(LOG, l);
}
}]);
}
event ssl_established(c: connection)
{
if ( c?$ssl && c$ssl?$server_name )
c$resp_hostname = c$ssl$server_name;
}
event connection_finished(c: connection)
{
if ( c?$resp_hostname )
hook add_sumstats(c$id, c$resp_hostname, c$resp$size);
}
event HTTP::log_http(rec: HTTP::Info)
{
if( rec?$host )
hook add_sumstats(rec$id, rec$host, rec$response_body_len);
}