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* origin/topic/dnthayer/ticket1472: Add new functions for calculating geographic distance BIT-1472 #merged
26 lines
859 B
Text
26 lines
859 B
Text
##! Functions to calculate distance between two locations, based on GeoIP data.
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## Returns the distance between two IP addresses using the haversine formula,
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## based on GeoIP database locations. Requires Bro to be built with libgeoip.
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##
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## a1: First IP address.
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##
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## a2: Second IP address.
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##
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## Returns: The distance between *a1* and *a2* in miles, or -1.0 if GeoIP data
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## is not available for either of the IP addresses.
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##
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## .. bro:see:: haversine_distance lookup_location
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function haversine_distance_ip(a1: addr, a2: addr): double
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{
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local loc1 = lookup_location(a1);
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local loc2 = lookup_location(a2);
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local miles: double;
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if ( loc1?$latitude && loc1?$longitude && loc2?$latitude && loc2?$longitude )
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miles = haversine_distance(loc1$latitude, loc1$longitude, loc2$latitude, loc2$longitude);
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else
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miles = -1.0;
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return miles;
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}
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