/
database.go
103 lines (85 loc) Β· 1.99 KB
/
database.go
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package geoip
import (
"fmt"
"sync"
"github.com/tevino/abool"
maxminddb "github.com/oschwald/maxminddb-golang"
"github.com/safing/portbase/log"
"github.com/safing/portbase/updater"
"github.com/safing/portmaster/updates"
)
var (
dbCityFile *updater.File
dbASNFile *updater.File
dbFileLock sync.Mutex
dbCity *maxminddb.Reader
dbASN *maxminddb.Reader
dbLock sync.Mutex
dbInUse = abool.NewBool(false) // only activate if used for first time
dbDoReload = abool.NewBool(true) // if database should be reloaded
)
// ReloadDatabases reloads the geoip database, if they are in use.
func ReloadDatabases() error {
// don't do anything if the database isn't actually used
if !dbInUse.IsSet() {
return nil
}
dbFileLock.Lock()
defer dbFileLock.Unlock()
dbLock.Lock()
defer dbLock.Unlock()
dbDoReload.Set()
return doReload()
}
func prepDatabaseForUse() error {
dbInUse.Set()
return doReload()
}
func doReload() error {
// reload if needed
if dbDoReload.SetToIf(true, false) {
closeDBs()
return openDBs()
}
return nil
}
func openDBs() error {
var err error
dbCityFile, err = updates.GetFile("intel/geoip/geoip-city.mmdb")
if err != nil {
return fmt.Errorf("could not get GeoIP City database file: %s", err)
}
dbCity, err = maxminddb.Open(dbCityFile.Path())
if err != nil {
return err
}
dbASNFile, err = updates.GetFile("intel/geoip/geoip-asn.mmdb")
if err != nil {
return fmt.Errorf("could not get GeoIP ASN database file: %s", err)
}
dbASN, err = maxminddb.Open(dbASNFile.Path())
if err != nil {
return err
}
return nil
}
func handleError(err error) {
log.Errorf("network/geoip: lookup failed, reloading databases: %s", err)
dbDoReload.Set()
}
func closeDBs() {
if dbCity != nil {
err := dbCity.Close()
if err != nil {
log.Warningf("network/geoip: failed to close database: %s", err)
}
}
dbCity = nil
if dbASN != nil {
err := dbASN.Close()
if err != nil {
log.Warningf("network/geoip: failed to close database: %s", err)
}
}
dbASN = nil
}