add ASN numbers to logstash output

utils/logstash-kippo.conf

@@ -31,6 +31,12 @@ filter {
                 add_field => [ "[geoip][coordinates]", "%{[geoip][longitude]}" ]
                 add_field => [ "[geoip][coordinates]", "%{[geoip][latitude]}"  ]
             }
+
+            geoip {
+                source => "src_ip"
+                database => "/opt/logstash/vendor/geoip/GeoIPASNum.dat"
+            }
+
             mutate {
                 convert => [ "[geoip][coordinates]", "float" ]
             }