satellite/geoip: exclude nodes with represented_contry from geofencing

Change-Id: I80b8e5d98f46559b158a26c47fff0586b97aff79

satellite/geoip/maxmind.go

@@ -22,9 +22,12 @@ func OpenMaxmindDB(filepath string) (*MaxmindDB, error) {
 }
 
 type ipInfo struct {
-	Country struct {
+	Country            country `maxminddb:"country"`
+	RepresentedCountry country `maxminddb:"represented_country"`
+}
+
+type country struct {
 	IsoCode string `maxminddb:"iso_code"`
-	} `maxminddb:"country"`
 }
 
 // MaxmindDB provides access to GeoIP data via the maxmind geoip databases.
@@ -52,5 +55,14 @@ func (m *MaxmindDB) LookupISOCountryCode(address string) (location.CountryCode,
 		return location.CountryCode(0), err
 	}
 
-	return location.ToCountryCode(info.Country.IsoCode), nil
+	return toCountryCode(info), nil
+}
+
+func toCountryCode(info *ipInfo) location.CountryCode {
+	// it's a tricky situation when represented_country is returned (like an embassy or military base).
+	// we have only 1-2 such nodes. it's more safe to exclude them from geofencing.
+	if info.RepresentedCountry.IsoCode != "" && info.RepresentedCountry.IsoCode != info.Country.IsoCode {
+		return location.None
+	}
+	return location.ToCountryCode(info.Country.IsoCode)
 }

satellite/geoip/maxmind_test.go

@@ -0,0 +1,59 @@
+// Copyright (C) 2023 Storj Labs, Inc.
+// See LICENSE for copying information
+
+package geoip
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"storj.io/common/storj/location"
+)
+
+func TestToCountryCode(t *testing.T) {
+	require.Equal(t, location.Germany, toCountryCode(&ipInfo{
+		Country: country{
+			IsoCode: "DE",
+		},
+	}))
+
+	require.Equal(t, location.Germany, toCountryCode(&ipInfo{
+		Country: country{
+			IsoCode: "DE",
+		},
+		RepresentedCountry: country{
+			IsoCode: "DE",
+		},
+	}))
+
+	require.Equal(t, location.None, toCountryCode(&ipInfo{
+		Country: country{
+			IsoCode: "DE",
+		},
+		RepresentedCountry: country{
+			IsoCode: "US",
+		},
+	}))
+}
+
+func TestMaxmind(t *testing.T) {
+	maxmindDB := os.Getenv("TEST_MAXMIND_DB")
+	if maxmindDB == "" {
+		t.Skip("Optional test")
+	}
+
+	db, err := OpenMaxmindDB(maxmindDB)
+	require.NoError(t, err)
+
+	// these assertions are based on the db from 2023-08-04. Can be different with different DB.
+
+	code, err := db.LookupISOCountryCode("62.112.192.4:80")
+	require.NoError(t, err)
+	require.Equal(t, location.Hungary, code)
+
+	code, err = db.LookupISOCountryCode("178.76.189.106:28967")
+	require.NoError(t, err)
+	require.Equal(t, location.None, code)
+}