package geoip import ( "net/netip" E "github.com/sagernet/sing/common/exceptions" "github.com/oschwald/maxminddb-golang" ) type Reader struct { reader *maxminddb.Reader } func Open(path string) (*Reader, []string, error) { database, err := maxminddb.Open(path) if err != nil { return nil, nil, err } if database.Metadata.DatabaseType != "sing-geoip" { database.Close() return nil, nil, E.New("incorrect database type, expected sing-geoip, got ", database.Metadata.DatabaseType) } return &Reader{database}, database.Metadata.Languages, nil } func (r *Reader) Lookup(addr netip.Addr) string { var code string _ = r.reader.Lookup(addr.AsSlice(), &code) if code != "" { return code } return "unknown" }