Replace GeoIP Legacy DB support with MaxMind DB support

This updates the "lookup_location" and "lookup_asn" BIFs to use
libmaxminddb.  The motivation for this is that MaxMind is discontinuing
GeoLite Legacy databases: no updates after April 1, 2018, no downloads
after January 2, 2019.  It's also noted that all GeoIP Legacy databases
may be discontinued as they are superseded by GeoIP2.

CMakeLists.txt

@@ -140,11 +140,11 @@ include_directories(BEFORE
 # Optional Dependencies
 
 set(USE_GEOIP false)
-find_package(LibGeoIP)
+find_package(LibMMDB)
-if (LIBGEOIP_FOUND)
+if (LibMMDB_FOUND)
     set(USE_GEOIP true)
-    include_directories(BEFORE ${LibGeoIP_INCLUDE_DIR})
+    include_directories(BEFORE ${LibMMDB_INCLUDE_DIR})
-    list(APPEND OPTLIBS ${LibGeoIP_LIBRARY})
+    list(APPEND OPTLIBS ${LibMMDB_LIBRARY})
 endif ()
 
 set(USE_KRB5 false)
@@ -323,7 +323,7 @@ message(
     "\nBroctl:            ${INSTALL_BROCTL}"
     "\nAux. Tools:        ${INSTALL_AUX_TOOLS}"
     "\n"
-    "\nGeoIP:             ${USE_GEOIP}"
+    "\nlibmaxminddb:      ${USE_GEOIP}"
     "\nKerberos:          ${USE_KRB5}"
     "\ngperftools found:  ${HAVE_PERFTOOLS}"
     "\n        tcmalloc:  ${USE_PERFTOOLS_TCMALLOC}"

NEWS

@@ -356,6 +356,15 @@ Changed Functionality
 - The string_to_pattern() built-in (and the now-deprecated merge_pattern()
   built-in) is no longer restricted to only be called at initialization time.
 
+- GeoIP Legacy Database support has been replaced with GeoIP2 MaxMind DB
+  format support.
+
+  - This updates the "lookup_location" and "lookup_asn" BIFs to use
+    libmaxminddb.  The motivation for this is that MaxMind is discontinuing
+    GeoLite Legacy databases: no updates after April 1, 2018, no downloads
+    after January 2, 2019.  It's also noted that all GeoIP Legacy databases
+    may be discontinued as they are superseded by GeoIP2.
+
 Removed Functionality
 ---------------------
 

bro-config.h.in

@@ -111,12 +111,6 @@
 /* Define if KRB5 is available */
 #cmakedefine USE_KRB5
 
-/* Whether the found GeoIP API supports IPv6 Country Edition */
-#cmakedefine HAVE_GEOIP_COUNTRY_EDITION_V6
-
-/* Whether the found GeoIP API supports IPv6 City Edition */
-#cmakedefine HAVE_GEOIP_CITY_EDITION_REV0_V6
-
 /* Use Google's perftools */
 #cmakedefine USE_PERFTOOLS_DEBUG
 

configure

@@ -72,7 +72,7 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
                            (a required Broker dependency)
 
   Optional Packages in Non-Standard Locations:
-    --with-geoip=PATH      path to the libGeoIP install root
+    --with-geoip=PATH      path to the libmaxminddb install root
     --with-krb5=PATH       path to krb5 install root
     --with-perftools=PATH  path to Google Perftools install root
     --with-jemalloc=PATH   path to jemalloc install root
@@ -252,7 +252,7 @@ while [ $# -ne 0 ]; do
             append_cache_entry BISON_EXECUTABLE PATH $optarg
             ;;
         --with-geoip=*)
-            append_cache_entry LibGeoIP_ROOT_DIR PATH $optarg
+            append_cache_entry LibMMDB_ROOT_DIR PATH $optarg
             ;;
         --with-krb5=*)
             append_cache_entry LibKrb5_ROOT_DIR PATH $optarg

doc/frameworks/geoip.rst

@@ -8,11 +8,13 @@ GeoLocation
 .. rst-class:: opening
 
     During the process of creating policy scripts the need may arise
-    to find the geographic location for an IP address. Bro has support
+    to find the geographic location for an IP address. Bro had support
     for the `GeoIP library <http://www.maxmind.com/app/c>`__ at the
-    policy script level beginning with release 1.3 to account for this
+    policy script level from release 1.3 to 2.5.X to account for this
-    need.  To use this functionality, you need to first install the libGeoIP
+    need.  Starting with release 2.6 GeoIP support requires `libmaxminddb
-    software, and then install the GeoLite city database before building
+    <https://github.com/maxmind/libmaxminddb/releases>`__.
+    To use this functionality, you need to first install the libmaxminddb
+    software, and then install the GeoLite2 city database before building
     Bro.
 
 .. contents::
@@ -20,85 +22,91 @@ GeoLocation
 Install libGeoIP
 ----------------
 
-Before building Bro, you need to install libGeoIP.
+Before building Bro, you need to install libmaxminddb.
 
 * FreeBSD:
 
   .. console::
 
-      sudo pkg install GeoIP
+      sudo pkg install libmaxminddb
 
 * RPM/RedHat-based Linux:
 
   .. console::
 
-      sudo yum install GeoIP-devel
+      sudo yum install libmaxminddb-devel
 
 * DEB/Debian-based Linux:
 
   .. console::
 
-      sudo apt-get install libgeoip-dev
+      sudo apt-get install libmaxminddb-dev
 
 * Mac OS X:
 
   You need to install from your preferred package management system
   (e.g. MacPorts, Fink, or Homebrew).  The name of the package that you need
-  may be libgeoip, geoip, or geoip-dev, depending on which package management
+  may be libmaxminddb, maxminddb, or libmaxminddb-dev, depending on which
-  system you are using.
+  package management system you are using.
 
 
-GeoIPLite Database Installation
+GeoLite2-City Database Installation
--------------------------------
+-----------------------------------
 
-A country database for GeoIPLite is included when you do the C API
+Bro can use the city or country database.  The city database includes cities
-install, but for Bro, we are using the city database which includes
+and regions in addition to countries.
-cities and regions in addition to countries.
 
-`Download <http://www.maxmind.com/app/geolitecity>`__ the GeoLite city
+`Download <http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.tar.gz>`__
-binary database:
+the GeoLite2 city binary database:
 
 .. console::
 
-    wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
+    wget http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.tar.gz
-    gunzip GeoLiteCity.dat.gz
+    tar zxf GeoLite2-City.tar.gz
 
-Next, the file needs to be renamed and put in the GeoIP database directory.
+Next, the file "GeoLite2-City_YYYYMMDD/GeoLite2-City.mmdb" needs to be renamed
-This directory should already exist and will vary depending on which platform
+and put in the GeoIP database directory.  This directory should already exist
-and package you are using.  For FreeBSD, use ``/usr/local/share/GeoIP``.  For
+and will vary depending on which platform and package you are using.  For
-Linux, use ``/usr/share/GeoIP`` or ``/var/lib/GeoIP`` (choose whichever one
+FreeBSD, use ``/usr/local/share/GeoIP``.  For Linux, use ``/usr/share/GeoIP``
-already exists).
+or ``/var/lib/GeoIP`` (choose whichever one already exists).
     
 .. console::
 
-    mv GeoLiteCity.dat <path_to_database_dir>/GeoIPCity.dat
+    mv <extracted subdir>/GeoLite2-City.mmdb <path_to_database_dir>/GeoLite2-City.mmdb
-
-Note that there is a separate database for IPv6 addresses, which can also
-be installed if you want GeoIP functionality for IPv6.
 
 Testing
 -------
 
 Before using the GeoIP functionality, it is a good idea to verify that
-everything is setup correctly.  After installing libGeoIP and the GeoIP city
+everything is setup correctly.  After installing libmaxminddb and the GeoIP
-database, and building Bro, you can quickly check if the GeoIP functionality
+city database, and building Bro, you can quickly check if the GeoIP
-works by running a command like this:
+functionality works by running a command like this:
 
 .. console::
 
     bro -e "print lookup_location(8.8.8.8);"
 
-If you see an error message similar to "Failed to open GeoIP City database",
+If you see an error message similar to "Failed to open GeoIP location
-then you may need to either rename or move your GeoIP city database file (the
+database", then you may need to either rename or move your GeoIP
-error message should give you the full pathname of the database file that
+location database file.  Bro looks for location database files in the
-Bro is looking for).
+following order by default:
+
+    /usr/share/GeoIP/GeoLite2-City.mmdb
+    /var/lib/GeoIP/GeoLite2-City.mmdb
+    /usr/local/share/GeoIP/GeoLite2-City.mmdb
+    /usr/local/var/GeoIP/GeoLite2-City.mmdb
+    /usr/share/GeoIP/GeoLite2-Country.mmdb
+    /var/lib/GeoIP/GeoLite2-Country.mmdb
+    /usr/local/share/GeoIP/GeoLite2-Country.mmdb
+    /usr/local/var/GeoIP/GeoLite2-Country.mmdb
 
 If you see an error message similar to "Bro was not configured for GeoIP
-support", then you need to rebuild Bro and make sure it is linked against
+support", then you either need to rebuild Bro and make sure it is linked
-libGeoIP.  Normally, if libGeoIP is installed correctly then it should
+against libmaxminddb or else set the :bro:see:`mmdb_dir`` value
-automatically be found when building Bro.  If this doesn't happen, then
+correctly.  Normally, if libmaxminddb is installed correctly then it
-you may need to specify the path to the libGeoIP installation
+should automatically be found when building Bro.  If this doesn't
-(e.g. ``./configure --with-geoip=<path>``).
+happen, then you may need to specify the path to the libmaxminddb
+installation (e.g. ``./configure --with-geoip=<path>``).
 
 Usage
 -----

scripts/base/init-bare.bro

@@ -872,6 +872,9 @@ type geo_location: record {
 	longitude: double &optional;	##< Longitude.
 } &log;
 
+## The directory containing MaxMind DB (*.mmdb) files to use for GeoIP support.
+const mmdb_dir: string = "" &redef;
+
 ## Computed entropy values. The record captures a number of measures that are
 ## computed in parallel. See `A Pseudorandom Number Sequence Test Program
 ## <http://www.fourmilab.ch/random>`_ for more information, Bro uses the same

src/bro.bif

@@ -3599,77 +3599,269 @@ function lookup_hostname%(host: string%) : addr_set
 %%{
 #ifdef USE_GEOIP
 extern "C" {
-#include <GeoIPCity.h>
+#include <maxminddb.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
 }
 
-static GeoIP* open_geoip_db(GeoIPDBTypes type)
+class MMDB {
+public:
+	MMDB(const char* filename);
+
+	~MMDB();
+
+	MMDB_lookup_result_s Lookup(const struct sockaddr* const sa);
+
+private:
+	MMDB_s mmdb;
+};
+
+MMDB::MMDB(const char *filename)
 	{
-	GeoIP* geoip = 0;
+	int status = MMDB_open(filename, MMDB_MODE_MMAP, &mmdb);
 
-	if ( GeoIP_db_avail(type) )
+	if ( MMDB_SUCCESS != status )
-		geoip = GeoIP_open_type(type, GEOIP_MEMORY_CACHE);
+		{
-
+		throw std::runtime_error(MMDB_strerror(status));
-	return geoip;
+		}
 	}
 
-static GeoIP* open_geoip_city_db()
+MMDB::~MMDB()
 	{
-	GeoIP* geoip = open_geoip_db(GEOIP_CITY_EDITION_REV0);
+	MMDB_close(&mmdb);
-
-	if ( ! geoip )
-		geoip = open_geoip_db(GEOIP_CITY_EDITION_REV1);
-
-	if ( ! geoip )
-		{
-		string rev0_path = GeoIPDBFileName[GEOIP_CITY_EDITION_REV0];
-		string rev1_path = GeoIPDBFileName[GEOIP_CITY_EDITION_REV1];
-		string db_path = rev0_path;
-
-		// Maybe in the future the revisions won't share a common default path.
-		if ( rev0_path != rev1_path )
-			db_path = rev0_path + " or " + rev1_path;
-
-		reporter->Info("Failed to open GeoIP City database: %s",
-		               db_path.c_str());
-		}
-
-	return geoip;
 	}
 
-static GeoIP* open_geoip_city_db_v6()
+MMDB_lookup_result_s MMDB::Lookup(const struct sockaddr* const sa)
 	{
-	GeoIP* geoip = 0;
+	int mmdb_error;
+	MMDB_lookup_result_s result = MMDB_lookup_sockaddr(&mmdb, sa, &mmdb_error);
 
-	// Both city edition revisions for IPv6 show up in libGeoIP 1.4.7.
+	if ( MMDB_SUCCESS != mmdb_error )
-#ifdef HAVE_GEOIP_CITY_EDITION_REV0_V6
-	geoip = open_geoip_db(GEOIP_CITY_EDITION_REV0_V6);
-
-	if ( ! geoip )
-		geoip = open_geoip_db(GEOIP_CITY_EDITION_REV1_V6);
-
-	if ( ! geoip )
 		{
-		string rev0_path = GeoIPDBFileName[GEOIP_CITY_EDITION_REV0_V6];
+		throw std::runtime_error(MMDB_strerror(mmdb_error));
-		string rev1_path = GeoIPDBFileName[GEOIP_CITY_EDITION_REV1_V6];
-		string db_path = rev0_path;
-
-		// Maybe in the future the revisions won't share a common default path.
-		if ( rev0_path != rev1_path )
-			db_path = rev0_path + " or " + rev1_path;
-
-		reporter->Info("Failed to open GeoIP Cityv6 database: %s",
-		               db_path.c_str());
 		}
-#endif
 
-	return geoip;
+	return result;
+	}
+
+std::unique_ptr<MMDB> mmdb_loc;
+std::unique_ptr<MMDB> mmdb_asn;
+
+static bool mmdb_open(const char* filename, bool asn)
+	{
+	struct stat buf;
+
+	if ( 0 != stat(filename, &buf) )
+		{
+		return false;
+		}
+
+	try
+		{
+		if ( asn )
+			{
+			mmdb_asn.reset(new MMDB(filename));
+			}
+		else
+			{
+			mmdb_loc.reset(new MMDB(filename));
+			}
+		}
+
+	catch ( const std::exception& e )
+		{
+		reporter->Info("Failed to open MaxMind DB: %s [%s]", filename,
+		               e.what());
+		return false;
+		}
+
+	return true;
+	}
+
+static bool mmdb_open_loc(const char* filename)
+	{
+	return mmdb_open(filename, false);
+	}
+
+static bool mmdb_open_asn(const char* filename)
+	{
+	return mmdb_open(filename, true);
+	}
+
+static bool mmdb_lookup(const IPAddr& addr, MMDB_lookup_result_s& result,
+                        bool asn)
+	{
+	struct sockaddr_storage ss = {0};
+
+	if ( IPv4 == addr.GetFamily() )
+		{
+		struct sockaddr_in* sa = (struct sockaddr_in*)&ss;
+		sa->sin_family = AF_INET;
+		addr.CopyIPv4(&sa->sin_addr);
+		}
+
+	else
+		{
+		struct sockaddr_in6* sa = (struct sockaddr_in6*)&ss;
+		sa->sin6_family = AF_INET6;
+		addr.CopyIPv6(&sa->sin6_addr);
+		}
+
+	try
+		{
+		result = asn ? mmdb_asn->Lookup((struct sockaddr*)&ss)
+		             : mmdb_loc->Lookup((struct sockaddr*)&ss);
+		}
+
+	catch ( const std::exception& e )
+		{
+		reporter->Info("MaxMind DB lookup location error [%s]",
+		               e.what());
+		return false;
+		}
+
+	return result.found_entry;
+	}
+
+static bool mmdb_lookup_loc(const IPAddr& addr, MMDB_lookup_result_s& result)
+	{
+	return mmdb_lookup(addr, result, false);
+	}
+
+static bool mmdb_lookup_asn(const IPAddr& addr, MMDB_lookup_result_s& result)
+	{
+	return mmdb_lookup(addr, result, true);
+	}
+
+static Val* mmdb_getvalue(MMDB_entry_data_s* entry_data, int status,
+                          int data_type )
+	{
+	switch (status)
+		{
+		case MMDB_SUCCESS:
+			if ( entry_data->has_data )
+				{
+				switch (data_type)
+					{
+					case MMDB_DATA_TYPE_UTF8_STRING:
+						return new StringVal(entry_data->data_size,
+						                     entry_data->utf8_string);
+						break;
+
+					case MMDB_DATA_TYPE_DOUBLE:
+						return new Val(entry_data->double_value, TYPE_DOUBLE);
+						break;
+
+					case MMDB_DATA_TYPE_UINT32:
+						return new Val(entry_data->uint32, TYPE_COUNT);
+
+					default:
+						break;
+					}
+				}
+			break;
+
+		case MMDB_LOOKUP_PATH_DOES_NOT_MATCH_DATA_ERROR:
+			// key doesn't exist, nothing to do
+			break;
+
+		default:
+			reporter->Info("MaxMind DB error [%s]", MMDB_strerror(status));
+			break;
+		}
+
+	return nullptr;
+	}
+
+static bool mmdb_try_open_loc ()
+	{
+	// City database is always preferred over Country database.
+	auto mmdb_dir_val = global_scope()->Lookup("mmdb_dir")->ID_Val();
+	std::string mmdb_dir = mmdb_dir_val->AsString()->CheckString();
+
+	if ( ! mmdb_dir.empty() )
+		{
+		auto d = mmdb_dir + "/GeoLite2-City.mmdb";
+
+		if ( mmdb_open_loc(d.data()) )
+			return true;
+
+		d = mmdb_dir + "/GeoLite2-Country.mmdb";
+
+		if ( mmdb_open_loc(d.data()) )
+			return true;;
+		}
+
+	return mmdb_open_loc("/usr/share/GeoIP/GeoLite2-City.mmdb")
+	    || mmdb_open_loc("/var/lib/GeoIP/GeoLite2-City.mmdb")
+	    || mmdb_open_loc("/usr/local/share/GeoIP/GeoLite2-City.mmdb")
+	    || mmdb_open_loc("/usr/local/var/GeoIP/GeoLite2-City.mmdb")
+	    || mmdb_open_loc("/usr/share/GeoIP/GeoLite2-Country.mmdb")
+	    || mmdb_open_loc("/var/lib/GeoIP/GeoLite2-Country.mmdb")
+	    || mmdb_open_loc("/usr/local/share/GeoIP/GeoLite2-Country.mmdb")
+	    || mmdb_open_loc("/usr/local/var/GeoIP/GeoLite2-Country.mmdb");
+	}
+
+static bool mmdb_try_open_asn ()
+	{
+	auto mmdb_dir_val = global_scope()->Lookup("mmdb_dir")->ID_Val();
+	std::string mmdb_dir = mmdb_dir_val->AsString()->CheckString();
+
+	if ( ! mmdb_dir.empty() )
+		{
+		auto d = mmdb_dir + "/GeoLite2-ASN.mmdb";
+
+		if ( mmdb_open_asn(d.data()) )
+			return true;
+		}
+
+	return mmdb_open_asn("/usr/share/GeoIP/GeoLite2-ASN.mmdb")
+	    || mmdb_open_asn("/var/lib/GeoIP/GeoLite2-ASN.mmdb")
+	    || mmdb_open_asn("/usr/local/share/GeoIP/GeoLite2-ASN.mmdb")
+	    || mmdb_open_asn("/usr/local/var/GeoIP/GeoLite2-ASN.mmdb");
 	}
 
 #endif
 %%}
 
+## Initializes MMDB for later use of lookup_location.
+## Requires Bro to be built with ``libmaxminddb``.
+##
+## f: The filename of the MaxMind City or Country DB.
+##
+## Returns: A boolean indicating whether the db was successfully opened.
+##
+## .. bro:see:: lookup_asn
+function mmdb_open_location_db%(f: string%) : bool
+	%{
+#ifdef USE_GEOIP
+	return new Val(mmdb_open_loc(f->CheckString()), TYPE_BOOL);
+#else
+        return new Val(0, TYPE_BOOL);
+#endif
+	%}
+
+## Initializes MMDB for later use of lookup_asn.
+## Requires Bro to be built with ``libmaxminddb``.
+##
+## f: The filename of the MaxMind ASN DB.
+##
+## Returns: A boolean indicating whether the db was successfully opened.
+##
+## .. bro:see:: lookup_asn
+function mmdb_open_asn_db%(f: string%) : bool
+	%{
+#ifdef USE_GEOIP
+	return new Val(mmdb_open_asn(f->CheckString()), TYPE_BOOL);
+#else
+	return new Val(0, TYPE_BOOL);
+#endif
+	%}
+
 ## Performs a geo-lookup of an IP address.
-## Requires Bro to be built with ``libgeoip``.
+## Requires Bro to be built with ``libmaxminddb``.
 ##
 ## a: The IP address to lookup.
 ##
@@ -3681,104 +3873,52 @@ function lookup_location%(a: addr%) : geo_location
 	RecordVal* location = new RecordVal(geo_location);
 
 #ifdef USE_GEOIP
-	static bool geoip_initialized = false;
+	if ( ! mmdb_loc )
-	static GeoIP* geoip = 0;
-	static GeoIP* geoip_v6 = 0;
-	static bool have_city_db = false;
-	static bool have_cityv6_db = false;
-	GeoIPRecord* gir = 0;
-	const char* cc = 0;
-
-	if ( ! geoip_initialized )
 		{
-		geoip_initialized = true;
+		if ( ! mmdb_try_open_loc() )
-		geoip = open_geoip_city_db();
-
-		if ( ! geoip )
 			{
-			geoip = open_geoip_db(GEOIP_COUNTRY_EDITION);
+			builtin_error("Failed to open GeoIP location database");
-			string db_path = GeoIPDBFileName[GEOIP_COUNTRY_EDITION];
+			return location;
-
-			if ( ! geoip )
-				builtin_error(fmt("Failed fall back to GeoIP Country "
-				                  "database: %s",
-				                  GeoIPDBFileName[GEOIP_COUNTRY_EDITION]));
-			else
-				reporter->Info("Fell back to GeoIP Country database");
 			}
-		else
-			have_city_db = true;
-
-		geoip_v6 = open_geoip_city_db_v6();
-
-		if ( geoip_v6 )
-			have_cityv6_db = true;
-
-#ifdef HAVE_GEOIP_COUNTRY_EDITION_V6
-		if ( ! geoip_v6 )
-			{
-			geoip_v6 = open_geoip_db(GEOIP_COUNTRY_EDITION_V6);
-
-			if ( ! geoip_v6 )
-				reporter->Info("Failed to open GeoIPv6 Country database: %s",
-				               GeoIPDBFileName[GEOIP_COUNTRY_EDITION_V6]);
-			}
-#endif
-
-		if ( ! geoip_v6 )
-			builtin_error("Can't open GeoIPv6 City/Country database");
 		}
 
-#ifdef HAVE_GEOIP_COUNTRY_EDITION_V6
+	MMDB_lookup_result_s result;
-	if ( geoip_v6 && a->AsAddr().GetFamily() == IPv6 )
+
+	if ( mmdb_lookup_loc(a->AsAddr(), result) )
 		{
-		geoipv6_t ga;
+		MMDB_entry_data_s entry_data;
-		a->AsAddr().CopyIPv6(&ga);
+		int status;
-		if ( have_cityv6_db )
-			gir = GeoIP_record_by_ipnum_v6(geoip_v6, ga);
-		else
-			cc = GeoIP_country_code_by_ipnum_v6(geoip_v6, ga);
-		}
-	else
-#endif
 
-	if ( geoip && a->AsAddr().GetFamily() == IPv4 )
+		// Get Country ISO Code
-		{
+		status = MMDB_get_value(&result.entry, &entry_data,
-		const uint32* bytes;
+		                        "country", "iso_code", nullptr);
-		a->AsAddr().GetBytes(&bytes);
+		location->Assign(0, mmdb_getvalue(&entry_data, status,
-		if ( have_city_db )
+		                 MMDB_DATA_TYPE_UTF8_STRING));
-			gir = GeoIP_record_by_ipnum(geoip, ntohl(*bytes));
-		else
-			cc = GeoIP_country_code_by_ipnum(geoip, ntohl(*bytes));
-		}
 
-	if ( gir )
+		// Get Major Subdivision ISO Code
-		{
+		status = MMDB_get_value(&result.entry, &entry_data,
-		if ( gir->country_code )
+		                        "subdivisions", "0", "iso_code", nullptr);
-			location->Assign(0, new StringVal(gir->country_code));
+		location->Assign(1, mmdb_getvalue(&entry_data, status,
+		                 MMDB_DATA_TYPE_UTF8_STRING));
 
-		if ( gir->region )
+		// Get City English Name
-			location->Assign(1, new StringVal(gir->region));
+		status = MMDB_get_value(&result.entry, &entry_data,
+		                        "city", "names", "en", nullptr);
+		location->Assign(2, mmdb_getvalue(&entry_data, status,
+		                 MMDB_DATA_TYPE_UTF8_STRING));
 
-		if ( gir->city )
+		// Get Location Latitude
-			location->Assign(2, new StringVal(gir->city));
+		status = MMDB_get_value(&result.entry, &entry_data,
+		                        "location", "latitude", nullptr);
+		location->Assign(3, mmdb_getvalue(&entry_data, status,
+		                 MMDB_DATA_TYPE_DOUBLE));
 
-		if ( gir->latitude )
+		// Get Location Longitude
-			location->Assign(3, new Val(gir->latitude,
+		status = MMDB_get_value(&result.entry, &entry_data,
-							TYPE_DOUBLE));
+		                        "location", "longitude", nullptr);
+		location->Assign(4, mmdb_getvalue(&entry_data, status,
+		                 MMDB_DATA_TYPE_DOUBLE));
 
-		if ( gir->longitude )
-			location->Assign(4, new Val(gir->longitude,
-						TYPE_DOUBLE));
-
-		GeoIPRecord_delete(gir);
-
-		return location;
-		}
-
-	else if ( cc )
-		{
-		location->Assign(0, new StringVal(cc));
 		return location;
 		}
 
@@ -3792,64 +3932,45 @@ function lookup_location%(a: addr%) : geo_location
 		}
 #endif
 
-	// We can get here even if we have GeoIP support if we weren't
+	// We can get here even if we have MMDB support if we weren't
 	// able to initialize it or it didn't return any information for
 	// the address.
 
 	return location;
 	%}
 
-## Performs an AS lookup of an IP address.
+## Performs an ASN lookup of an IP address.
-## Requires Bro to be built with ``libgeoip``.
+## Requires Bro to be built with ``libmaxminddb``.
 ##
 ## a: The IP address to lookup.
 ##
-## Returns: The number of the AS that contains *a*.
+## Returns: The number of the ASN that contains *a*.
 ##
 ## .. bro:see:: lookup_location
 function lookup_asn%(a: addr%) : count
 	%{
 #ifdef USE_GEOIP
-	static GeoIP* geoip_asn = 0;
+	if ( ! mmdb_asn )
-	static bool geoip_asn_initialized = false;
-	char* gir = 0;
-
-	if ( ! geoip_asn_initialized )
 		{
-		geoip_asn_initialized = true;
+		if ( ! mmdb_try_open_asn() )
-		geoip_asn = open_geoip_db(GEOIP_ASNUM_EDITION);
-
-		if ( ! geoip_asn )
-			builtin_error(fmt("Can't open GeoIP ASNUM database: %s",
-			                  GeoIPDBFileName[GEOIP_ASNUM_EDITION]));
-		}
-
-	if ( geoip_asn )
-		{
-// IPv6 support showed up in 1.4.5.
-#ifdef HAVE_GEOIP_COUNTRY_EDITION_V6
-		if ( a->AsAddr().GetFamily() == IPv6 )
 			{
-			geoipv6_t ga;
+			builtin_error("No open GeoIP ASN database");
-			a->AsAddr().CopyIPv6(&ga);
+			return new Val(0, TYPE_COUNT);
-			gir = GeoIP_name_by_ipnum_v6(geoip_asn, ga);
-			}
-		else
-#endif
-
-		if ( a->AsAddr().GetFamily() == IPv4 )
-			{
-			const uint32* bytes;
-			a->AsAddr().GetBytes(&bytes);
-			gir = GeoIP_name_by_ipnum(geoip_asn, ntohl(*bytes));
 			}
 		}
 
-	if ( gir )
+	MMDB_lookup_result_s result;
+
+	if ( mmdb_lookup_asn(a->AsAddr(), result) )
 		{
-		// Move the pointer +2 so we don't return
+		MMDB_entry_data_s entry_data;
-		// the first two characters: "AS".
+		int status;
-		return new Val(atoi(gir+2), TYPE_COUNT);
+
+		// Get Autonomous System Number
+		status = MMDB_get_value(&result.entry, &entry_data,
+		                        "autonomous_system_number", nullptr);
+		Val* asn = mmdb_getvalue(&entry_data, status, MMDB_DATA_TYPE_UINT32);
+		return asn == nullptr ? new Val(0, TYPE_COUNT) : asn;
 		}
 
 #else // not USE_GEOIP