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109 lines
3.5 KiB
Text
109 lines
3.5 KiB
Text
@load base/protocols/http
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@load base/protocols/ssl
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@load base/frameworks/sumstats
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module AppStats;
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export {
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redef enum Log::ID += { LOG };
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type Info: record {
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## Timestamp when the log line was finished and written.
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ts: time &log;
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## Time interval that the log line covers.
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ts_delta: interval &log;
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## The name of the "app", like "facebook" or "netflix".
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app: string &log;
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## The number of unique local hosts using the app.
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uniq_hosts: count &log;
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## The number of hits to the app in total.
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hits: count &log;
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## The total number of bytes received by users of the app.
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bytes: count &log;
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};
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## The frequency of logging the stats collected by this script.
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const break_interval = 15mins &redef;
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}
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redef record connection += {
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resp_hostname: string &optional;
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};
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event bro_init() &priority=3
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{
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Log::create_stream(AppStats::LOG, [$columns=Info]);
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local r1: SumStats::Reducer = [$stream="apps.bytes", $apply=set(SumStats::SUM)];
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local r2: SumStats::Reducer = [$stream="apps.hits", $apply=set(SumStats::UNIQUE)];
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SumStats::create([$epoch=break_interval,
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$reducers=set(r1, r2),
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$epoch_finished(data: SumStats::ResultTable) =
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{
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local l: Info;
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l$ts = network_time();
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l$ts_delta = break_interval;
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for ( key in data )
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{
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local result = data[key];
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l$app = key$str;
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l$bytes = double_to_count(floor(result["apps.bytes"]$sum));
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l$hits = result["apps.hits"]$num;
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l$uniq_hosts = result["apps.hits"]$unique;
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Log::write(LOG, l);
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}
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}]);
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}
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function add_sumstats(id: conn_id, hostname: string, size: count)
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{
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if ( /\.youtube\.com$/ in hostname && size > 512*1024 )
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{
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SumStats::observe("apps.bytes", [$str="youtube"], [$num=size]);
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SumStats::observe("apps.hits", [$str="youtube"], [$str=cat(id$orig_h)]);
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}
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else if ( /(\.facebook\.com|\.fbcdn\.net)$/ in hostname && size > 20 )
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{
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SumStats::observe("apps.bytes", [$str="facebook"], [$num=size]);
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SumStats::observe("apps.hits", [$str="facebook"], [$str=cat(id$orig_h)]);
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}
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else if ( /\.google\.com$/ in hostname && size > 20 )
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{
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SumStats::observe("apps.bytes", [$str="google"], [$num=size]);
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SumStats::observe("apps.hits", [$str="google"], [$str=cat(id$orig_h)]);
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}
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else if ( /\.nflximg\.com$/ in hostname && size > 200*1024 )
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{
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SumStats::observe("apps.bytes", [$str="netflix"], [$num=size]);
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SumStats::observe("apps.hits", [$str="netflix"], [$str=cat(id$orig_h)]);
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}
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else if ( /\.(pandora|p-cdn)\.com$/ in hostname && size > 512*1024 )
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{
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SumStats::observe("apps.bytes", [$str="pandora"], [$num=size]);
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SumStats::observe("apps.hits", [$str="pandora"], [$str=cat(id$orig_h)]);
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}
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else if ( /\.gmail\.com$/ in hostname && size > 20 )
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{
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SumStats::observe("apps.bytes", [$str="gmail"], [$num=size]);
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SumStats::observe("apps.hits", [$str="gmail"], [$str=cat(id$orig_h)]);
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}
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}
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event ssl_established(c: connection)
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{
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if ( c?$ssl && c$ssl?$server_name )
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c$resp_hostname = c$ssl$server_name;
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}
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event connection_finished(c: connection)
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{
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if ( c?$resp_hostname )
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add_sumstats(c$id, c$resp_hostname, c$resp$size);
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}
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event HTTP::log_http(rec: HTTP::Info)
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{
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if( rec?$host )
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add_sumstats(rec$id, rec$host, rec$response_body_len);
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}
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