pax_global_header00006660000000000000000000000064124327627050014522gustar00rootroot0000000000000052 comment=e60a782e07a8ce523880058ba950dfa5cc244098 maxminddb-golang-0.2.0/000077500000000000000000000000001243276270500147315ustar00rootroot00000000000000maxminddb-golang-0.2.0/.gitmodules000066400000000000000000000001311243276270500171010ustar00rootroot00000000000000[submodule "test-data"] path = test-data url = git://github.com/maxmind/MaxMind-DB.git maxminddb-golang-0.2.0/.travis.yml000066400000000000000000000001441243276270500170410ustar00rootroot00000000000000language: go go: - 1.1 - 1.2 - 1.3 - release - tip install: - go get launchpad.net/gocheck maxminddb-golang-0.2.0/LICENSE000066400000000000000000000261361243276270500157460ustar00rootroot00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. 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See the License for the specific language governing permissions and limitations under the License. maxminddb-golang-0.2.0/README.md000066400000000000000000000020251243276270500162070ustar00rootroot00000000000000# MaxMind DB Reader for Go # [![Build Status](https://travis-ci.org/oschwald/maxminddb-golang.png?branch=master)](https://travis-ci.org/oschwald/maxminddb-golang) [![GoDoc](https://godoc.org/github.com/oschwald/maxminddb-golang?status.png)](https://godoc.org/github.com/oschwald/maxminddb-golang) This is a Go reader for the MaxMind DB format. This can be used to read [GeoLite2](http://dev.maxmind.com/geoip/geoip2/geolite2/) and [GeoIP2](http://www.maxmind.com/en/geolocation_landing) databases. This is not an official MaxMind API. ## Installation ## ``` go get github.com/oschwald/maxminddb-golang ``` ## Usage ## [See GoDoc](http://godoc.org/github.com/oschwald/maxminddb-golang) for documentation and examples. ## Examples ## See [GoDoc](http://godoc.org/github.com/oschwald/maxminddb-golang) or `example_test.go` for examples. ## Contributing ## Contributions welcome! Please fork the repository and open a pull request with your changes. ## License ## This is free software, licensed under the Apache License, Version 2.0. maxminddb-golang-0.2.0/build.cmd000066400000000000000000000000721243276270500165140ustar00rootroot00000000000000set GOPATH=%BuildFolder% go get -v ./... go test -v ./... maxminddb-golang-0.2.0/decoder.go000066400000000000000000000326671243276270500167030ustar00rootroot00000000000000package maxminddb import ( "bytes" "encoding/binary" "fmt" "math/big" "reflect" ) type decoder struct { buffer []byte pointerBase uint } type dataType int const ( _Extended dataType = iota _Pointer _String _Float64 _Bytes _Uint16 _Uint32 _Map _Int32 _Uint64 _Uint128 _Slice _Container _Marker _Bool _Float32 ) func (d *decoder) decode(offset uint, result reflect.Value) (uint, error) { typeNum, size, newOffset := d.decodeCtrlData(offset) return d.decodeFromType(typeNum, size, newOffset, result) } func (d *decoder) decodeCtrlData(offset uint) (dataType, uint, uint) { newOffset := offset + 1 ctrlByte := d.buffer[offset] typeNum := dataType(ctrlByte >> 5) if typeNum == _Extended { typeNum = dataType(d.buffer[newOffset] + 7) newOffset++ } var size uint size, newOffset = d.sizeFromCtrlByte(ctrlByte, newOffset, typeNum) return typeNum, size, newOffset } func (d *decoder) sizeFromCtrlByte(ctrlByte byte, offset uint, typeNum dataType) (uint, uint) { size := uint(ctrlByte & 0x1f) if typeNum == _Extended { return size, offset } var bytesToRead uint if size > 28 { bytesToRead = size - 28 } newOffset := offset + bytesToRead sizeBytes := d.buffer[offset:newOffset] switch { case size == 29: size = 29 + uint(sizeBytes[0]) case size == 30: size = 285 + uint(uintFromBytes(0, sizeBytes)) case size > 30: size = uint(uintFromBytes(0, sizeBytes)) + 65821 } return size, newOffset } func (d *decoder) decodeFromType(dtype dataType, size uint, offset uint, result reflect.Value) (uint, error) { if result.Kind() == reflect.Ptr { result = reflect.Indirect(result) } switch dtype { case _Bool: return d.unmarshalBool(size, offset, result) case _Bytes: return d.unmarshalBytes(size, offset, result) case _Float32: return d.unmarshalFloat32(size, offset, result) case _Float64: return d.unmarshalFloat64(size, offset, result) case _Int32: return d.unmarshalInt32(size, offset, result) case _Map: return d.unmarshalMap(size, offset, result) case _Pointer: return d.unmarshalPointer(size, offset, result) case _Slice: return d.unmarshalSlice(size, offset, result) case _String: return d.unmarshalString(size, offset, result) case _Uint16: return d.unmarshalUint(size, offset, result, 16) case _Uint32: return d.unmarshalUint(size, offset, result, 32) case _Uint64: return d.unmarshalUint(size, offset, result, 64) case _Uint128: return d.unmarshalUint128(size, offset, result) default: return 0, fmt.Errorf("unknown type: %d", dtype) } } func (d *decoder) unmarshalBool(size uint, offset uint, result reflect.Value) (uint, error) { if size > 1 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (bool size of %v)", size) } value, newOffset, err := d.decodeBool(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Bool: result.SetBool(value) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalBytes(size uint, offset uint, result reflect.Value) (uint, error) { value, newOffset, err := d.decodeBytes(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Slice: result.SetBytes(value) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalFloat32(size uint, offset uint, result reflect.Value) (uint, error) { if size != 4 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (float32 size of %v)", size) } value, newOffset, err := d.decodeFloat32(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Float32, reflect.Float64: result.SetFloat(float64(value)) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalFloat64(size uint, offset uint, result reflect.Value) (uint, error) { if size != 8 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (float 64 size of %v)", size) } value, newOffset, err := d.decodeFloat64(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Float32, reflect.Float64: result.SetFloat(value) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalInt32(size uint, offset uint, result reflect.Value) (uint, error) { if size > 4 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (int32 size of %v)", size) } value, newOffset, err := d.decodeInt(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: result.SetInt(int64(value)) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalMap(size uint, offset uint, result reflect.Value) (uint, error) { switch result.Kind() { default: return 0, fmt.Errorf("trying to unmarshal a map into %v", result.Type()) case reflect.Struct: return d.decodeStruct(size, offset, result) case reflect.Map: return d.decodeMap(size, offset, result) case reflect.Interface: rv := reflect.ValueOf(make(map[string]interface{}, size)) newOffset, err := d.decodeMap(size, offset, rv) result.Set(rv) return newOffset, err } } func (d *decoder) unmarshalPointer(size uint, offset uint, result reflect.Value) (uint, error) { pointer, newOffset := d.decodePointer(size, offset) _, err := d.decode(pointer, result) return newOffset, err } func (d *decoder) unmarshalSlice(size uint, offset uint, result reflect.Value) (uint, error) { switch result.Kind() { default: return 0, fmt.Errorf("trying to unmarshal an array into %v", result.Type()) case reflect.Slice: return d.decodeSlice(size, offset, result) case reflect.Interface: a := []interface{}{} rv := reflect.ValueOf(&a).Elem() newOffset, err := d.decodeSlice(size, offset, rv) result.Set(rv) return newOffset, err } } func (d *decoder) unmarshalString(size uint, offset uint, result reflect.Value) (uint, error) { value, newOffset, err := d.decodeString(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.String: result.SetString(value) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalUint(size uint, offset uint, result reflect.Value, uintType uint) (uint, error) { if size > uintType/8 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (uint%v size of %v)", uintType, size) } value, newOffset, err := d.decodeUint(size, offset) if err != nil { return 0, err } switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: result.SetUint(value) return newOffset, nil case reflect.Interface: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) unmarshalUint128(size uint, offset uint, result reflect.Value) (uint, error) { if size > 16 { return 0, fmt.Errorf("the MaxMind DB file's data section contains bad data (uint128 size of %v)", size) } value, newOffset, err := d.decodeUint128(size, offset) if err != nil { return 0, err } // XXX - this should allow *big.Int rather than just bigInt // Currently this is reported as invalid switch result.Kind() { default: return newOffset, fmt.Errorf("trying to unmarshal %v into %v", value, result.Type()) case reflect.Struct: result.Set(reflect.ValueOf(*value)) return newOffset, nil case reflect.Interface, reflect.Ptr: result.Set(reflect.ValueOf(value)) return newOffset, nil } } func (d *decoder) decodeBool(size uint, offset uint) (bool, uint, error) { return size != 0, offset, nil } func (d *decoder) decodeBytes(size uint, offset uint) ([]byte, uint, error) { newOffset := offset + size bytes := make([]byte, size) copy(bytes, d.buffer[offset:newOffset]) return bytes, newOffset, nil } func (d *decoder) decodeFloat64(size uint, offset uint) (float64, uint, error) { newOffset := offset + size var dbl float64 binary.Read(bytes.NewBuffer(d.buffer[offset:newOffset]), binary.BigEndian, &dbl) return dbl, newOffset, nil } func (d *decoder) decodeFloat32(size uint, offset uint) (float32, uint, error) { newOffset := offset + size var flt float32 binary.Read(bytes.NewBuffer(d.buffer[offset:newOffset]), binary.BigEndian, &flt) return flt, newOffset, nil } func (d *decoder) decodeInt(size uint, offset uint) (int, uint, error) { newOffset := offset + size intBytes := d.buffer[offset:newOffset] if size != 4 { pad := make([]byte, 4-size) intBytes = append(pad, intBytes...) } var val int32 binary.Read(bytes.NewBuffer(intBytes), binary.BigEndian, &val) return int(val), newOffset, nil } func (d *decoder) decodeMap(size uint, offset uint, result reflect.Value) (uint, error) { if result.IsNil() { result.Set(reflect.MakeMap(result.Type())) } for i := uint(0); i < size; i++ { var key string var err error key, offset, err = d.decodeKeyString(offset) if err != nil { return 0, err } value := reflect.New(result.Type().Elem()) offset, err = d.decode(offset, value) if err != nil { return 0, err } result.SetMapIndex(reflect.ValueOf(key), value.Elem()) } return offset, nil } func (d *decoder) decodePointer(size uint, offset uint) (uint, uint) { pointerSize := ((size >> 3) & 0x3) + 1 newOffset := offset + pointerSize pointerBytes := d.buffer[offset:newOffset] var prefix uint64 if pointerSize == 4 { prefix = 0 } else { prefix = uint64(size & 0x7) } unpacked := uint(uintFromBytes(prefix, pointerBytes)) var pointerValueOffset uint switch pointerSize { case 1: pointerValueOffset = 0 case 2: pointerValueOffset = 2048 case 3: pointerValueOffset = 526336 case 4: pointerValueOffset = 0 } pointer := unpacked + d.pointerBase + pointerValueOffset return pointer, newOffset } func (d *decoder) decodeSlice(size uint, offset uint, result reflect.Value) (uint, error) { result.Set(reflect.MakeSlice(result.Type(), int(size), int(size))) for i := 0; i < int(size); i++ { var err error offset, err = d.decode(offset, result.Index(i)) if err != nil { return 0, err } } return offset, nil } func (d *decoder) decodeString(size uint, offset uint) (string, uint, error) { newOffset := offset + size return string(d.buffer[offset:newOffset]), newOffset, nil } func (d *decoder) decodeStruct(size uint, offset uint, result reflect.Value) (uint, error) { resultType := result.Type() numFields := resultType.NumField() fields := make(map[string]reflect.Value, numFields) for i := 0; i < numFields; i++ { fieldType := resultType.Field(i) fieldName := fieldType.Name tag := fieldType.Tag.Get("maxminddb") if tag != "" { fieldName = tag } fields[fieldName] = result.Field(i) } for i := uint(0); i < size; i++ { var key string var err error key, offset, err = d.decodeKeyString(offset) if err != nil { return 0, err } field, ok := fields[key] if !ok { offset = d.nextValueOffset(offset, 1) continue } offset, err = d.decode(offset, field) if err != nil { return 0, err } } return offset, nil } func (d *decoder) decodeUint(size uint, offset uint) (uint64, uint, error) { newOffset := offset + size val := uintFromBytes(0, d.buffer[offset:newOffset]) return val, newOffset, nil } func (d *decoder) decodeUint128(size uint, offset uint) (*big.Int, uint, error) { newOffset := offset + size val := new(big.Int) val.SetBytes(d.buffer[offset:newOffset]) return val, newOffset, nil } func uintFromBytes(prefix uint64, uintBytes []byte) uint64 { val := prefix for _, b := range uintBytes { val = (val << 8) | uint64(b) } return val } func (d *decoder) decodeKeyString(offset uint) (string, uint, error) { typeNum, size, newOffset := d.decodeCtrlData(offset) if typeNum == _Pointer { pointer, ptrOffset := d.decodePointer(size, newOffset) key, _, err := d.decodeKeyString(pointer) return key, ptrOffset, err } if typeNum != _String { return "", 0, fmt.Errorf("unexpected type when decoding string: %v", typeNum) } return d.decodeString(size, newOffset) } // This function is used to skip ahead to the next value without decoding // the one at the offset passed in. The size bits have different meanings for // different data types func (d *decoder) nextValueOffset(offset uint, numberToSkip uint) uint { if numberToSkip == 0 { return offset } typeNum, size, offset := d.decodeCtrlData(offset) switch typeNum { case _Pointer: _, offset = d.decodePointer(size, offset) case _Map: numberToSkip += 2 * size case _Slice: numberToSkip += size case _Bool: default: offset += size } return d.nextValueOffset(offset, numberToSkip-1) } maxminddb-golang-0.2.0/decoder_test.go000066400000000000000000000151461243276270500177330ustar00rootroot00000000000000package maxminddb import ( "encoding/hex" "math/big" "os" "reflect" "strings" "testing" ) func TestBool(t *testing.T) { bools := map[string]interface{}{ "0007": false, "0107": true, } validateDecoding(t, bools) } func TestDouble(t *testing.T) { doubles := map[string]interface{}{ "680000000000000000": 0.0, "683FE0000000000000": 0.5, "68400921FB54442EEA": 3.14159265359, "68405EC00000000000": 123.0, "6841D000000007F8F4": 1073741824.12457, "68BFE0000000000000": -0.5, "68C00921FB54442EEA": -3.14159265359, "68C1D000000007F8F4": -1073741824.12457, } validateDecoding(t, doubles) } func TestFloat(t *testing.T) { floats := map[string]interface{}{ "040800000000": float32(0.0), "04083F800000": float32(1.0), "04083F8CCCCD": float32(1.1), "04084048F5C3": float32(3.14), "0408461C3FF6": float32(9999.99), "0408BF800000": float32(-1.0), "0408BF8CCCCD": float32(-1.1), "0408C048F5C3": -float32(3.14), "0408C61C3FF6": float32(-9999.99), } validateDecoding(t, floats) } func TestInt32(t *testing.T) { int32 := map[string]interface{}{ "0001": 0, "0401ffffffff": -1, "0101ff": 255, "0401ffffff01": -255, "020101f4": 500, "0401fffffe0c": -500, "0201ffff": 65535, "0401ffff0001": -65535, "0301ffffff": 16777215, "0401ff000001": -16777215, "04017fffffff": 2147483647, "040180000001": -2147483647, } validateDecoding(t, int32) } func TestMap(t *testing.T) { maps := map[string]interface{}{ "e0": map[string]interface{}{}, "e142656e43466f6f": map[string]interface{}{"en": "Foo"}, "e242656e43466f6f427a6843e4baba": map[string]interface{}{"en": "Foo", "zh": "人"}, "e1446e616d65e242656e43466f6f427a6843e4baba": map[string]interface{}{"name": map[string]interface{}{"en": "Foo", "zh": "人"}}, "e1496c616e677561676573020442656e427a68": map[string]interface{}{"languages": []interface{}{"en", "zh"}}, } validateDecoding(t, maps) } func TestSlice(t *testing.T) { slice := map[string]interface{}{ "0004": []interface{}{}, "010443466f6f": []interface{}{"Foo"}, "020443466f6f43e4baba": []interface{}{"Foo", "人"}, } validateDecoding(t, slice) } var testStrings = makeTestStrings() func makeTestStrings() map[string]interface{} { str := map[string]interface{}{ "40": "", "4131": "1", "43E4BABA": "人", "5b313233343536373839303132333435363738393031323334353637": "123456789012345678901234567", "5c31323334353637383930313233343536373839303132333435363738": "1234567890123456789012345678", "5d003132333435363738393031323334353637383930313233343536373839": "12345678901234567890123456789", "5d01313233343536373839303132333435363738393031323334353637383930": "123456789012345678901234567890", } for k, v := range map[string]int{"5e00d7": 500, "5e06b3": 2000, "5f001053": 70000} { key := k + strings.Repeat("78", v) str[key] = strings.Repeat("x", v) } return str } func TestString(t *testing.T) { validateDecoding(t, testStrings) } func TestByte(t *testing.T) { b := make(map[string]interface{}) for key, val := range testStrings { oldCtrl, _ := hex.DecodeString(key[0:2]) newCtrl := []byte{oldCtrl[0] ^ 0xc0} key = strings.Replace(key, hex.EncodeToString(oldCtrl), hex.EncodeToString(newCtrl), 1) b[key] = []byte(val.(string)) } validateDecoding(t, b) } func TestUint16(t *testing.T) { uint16 := map[string]interface{}{ "a0": uint64(0), "a1ff": uint64(255), "a201f4": uint64(500), "a22a78": uint64(10872), "a2ffff": uint64(65535), } validateDecoding(t, uint16) } func TestUint32(t *testing.T) { uint32 := map[string]interface{}{ "c0": uint64(0), "c1ff": uint64(255), "c201f4": uint64(500), "c22a78": uint64(10872), "c2ffff": uint64(65535), "c3ffffff": uint64(16777215), "c4ffffffff": uint64(4294967295), } validateDecoding(t, uint32) } func TestUint64(t *testing.T) { ctrlByte := "02" bits := uint64(64) uints := map[string]interface{}{ "00" + ctrlByte: uint64(0), "02" + ctrlByte + "01f4": uint64(500), "02" + ctrlByte + "2a78": uint64(10872), } for i := uint64(0); i <= bits/8; i++ { expected := uint64((1 << (8 * i)) - 1) input := hex.EncodeToString([]byte{byte(i)}) + ctrlByte + strings.Repeat("ff", int(i)) uints[input] = expected } validateDecoding(t, uints) } // Dedup with above somehow func TestUint128(t *testing.T) { ctrlByte := "03" bits := uint(128) uints := map[string]interface{}{ "00" + ctrlByte: big.NewInt(0), "02" + ctrlByte + "01f4": big.NewInt(500), "02" + ctrlByte + "2a78": big.NewInt(10872), } for i := uint(1); i <= bits/8; i++ { expected := powBigInt(big.NewInt(2), 8*i) expected = expected.Sub(expected, big.NewInt(1)) input := hex.EncodeToString([]byte{byte(i)}) + ctrlByte + strings.Repeat("ff", int(i)) uints[input] = expected } validateDecoding(t, uints) } // No pow or bit shifting for big int, apparently :-( // This is _not_ meant to be a comprehensive power function func powBigInt(bi *big.Int, pow uint) *big.Int { newInt := big.NewInt(1) for i := uint(0); i < pow; i++ { newInt.Mul(newInt, bi) } return newInt } func validateDecoding(t *testing.T, tests map[string]interface{}) { for inputStr, expected := range tests { inputBytes, _ := hex.DecodeString(inputStr) d := decoder{inputBytes, 0} var result interface{} _, err := d.decode(0, reflect.ValueOf(&result)) if err != nil { t.Error(err) } if !reflect.DeepEqual(result, expected) { // A big case statement would produce nicer errors t.Errorf("Output was incorrect: %s %s", inputStr, expected) } } } func TestPointers(t *testing.T) { mapFile, err := os.Open("test-data/test-data/maps-with-pointers.raw") if err != nil { t.Error(err) } defer mapFile.Close() stats, err := mapFile.Stat() if err != nil { t.Error(err) } mmap, err := mmap(int(mapFile.Fd()), int(stats.Size())) if err != nil { t.Error(err) } defer munmap(mmap) d := decoder{mmap, 0} expected := map[uint]map[string]string{ 0: map[string]string{"long_key": "long_value1"}, 22: map[string]string{"long_key": "long_value2"}, 37: map[string]string{"long_key2": "long_value1"}, 50: map[string]string{"long_key2": "long_value2"}, 55: map[string]string{"long_key": "long_value1"}, 57: map[string]string{"long_key2": "long_value2"}, } for offset, expectedValue := range expected { var actual map[string]string _, err := d.decode(offset, reflect.ValueOf(&actual)) if err != nil { t.Error(err) } if !reflect.DeepEqual(actual, expectedValue) { t.Errorf("Decode for pointer at %d failed", offset) } } } maxminddb-golang-0.2.0/example_test.go000066400000000000000000000017721243276270500177610ustar00rootroot00000000000000package maxminddb_test import ( "fmt" "log" "net" "github.com/oschwald/maxminddb-golang" ) type onlyCountry struct { Country struct { IsoCode string `maxminddb:"iso_code"` } `maxminddb:"country"` } // This example shows how to decode to a struct func ExampleReader_Lookup_struct() { db, err := maxminddb.Open("test-data/test-data/GeoIP2-City-Test.mmdb") if err != nil { log.Fatal(err) } defer db.Close() ip := net.ParseIP("81.2.69.142") var record onlyCountry // Or any appropriate struct err = db.Lookup(ip, &record) if err != nil { log.Fatal(err) } fmt.Print(record.Country.IsoCode) // Output: // GB } // This example demonstrates how to decode to an interface{} func ExampleReader_Lookup_interface() { db, err := maxminddb.Open("test-data/test-data/GeoIP2-City-Test.mmdb") if err != nil { log.Fatal(err) } defer db.Close() ip := net.ParseIP("81.2.69.142") var record interface{} err = db.Lookup(ip, &record) if err != nil { log.Fatal(err) } fmt.Printf("%v", record) } maxminddb-golang-0.2.0/reader.go000066400000000000000000000152141243276270500165250ustar00rootroot00000000000000package maxminddb import ( "bytes" "errors" "fmt" "net" "os" "reflect" ) const dataSectionSeparatorSize = 16 var metadataStartMarker = []byte("\xAB\xCD\xEFMaxMind.com") // Reader holds the data corresponding to the MaxMind DB file. Its only public // field is Metadata, which contains the metadata from the MaxMind DB file. type Reader struct { hasMappedFile bool buffer []byte decoder decoder Metadata Metadata ipv4Start uint } // Metadata holds the metadata decoded from the MaxMind DB file. In particular // in has the format version, the build time as Unix epoch time, the database // type and description, the IP version supported, and a slice of the natural // languages included. type Metadata struct { BinaryFormatMajorVersion uint `maxminddb:"binary_format_major_version"` BinaryFormatMinorVersion uint `maxminddb:"binary_format_minor_version"` BuildEpoch uint `maxminddb:"build_epoch"` DatabaseType string `maxminddb:"database_type"` Description map[string]string `maxminddb:"description"` IPVersion uint `maxminddb:"ip_version"` Languages []string `maxminddb:"languages"` NodeCount uint `maxminddb:"node_count"` RecordSize uint `maxminddb:"record_size"` } // Open takes a string path to a MaxMind DB file and returns a Reader // structure or an error. The database file is opened using a memory map. Use // the Close method on the Reader object to return the resources to the // system. func Open(file string) (*Reader, error) { mapFile, err := os.Open(file) if err != nil { return nil, err } defer mapFile.Close() stats, err := mapFile.Stat() if err != nil { return nil, err } fileSize := int(stats.Size()) mmap, err := mmap(int(mapFile.Fd()), fileSize) if err != nil { return nil, err } reader, err := FromBytes(mmap) if err != nil { munmap(mmap) return nil, err } reader.hasMappedFile = true return reader, nil } // FromBytes takes a byte slice corresponding to a MaxMind DB file and returns // a Reader structure or an error. func FromBytes(buffer []byte) (*Reader, error) { metadataStart := bytes.LastIndex(buffer, metadataStartMarker) if metadataStart == -1 { return nil, fmt.Errorf("error opening database file: invalid MaxMind DB file") } metadataStart += len(metadataStartMarker) metadataDecoder := decoder{buffer, uint(metadataStart)} var metadata Metadata rvMetdata := reflect.ValueOf(&metadata) _, err := metadataDecoder.decode(uint(metadataStart), rvMetdata) if err != nil { return nil, err } searchTreeSize := metadata.NodeCount * metadata.RecordSize / 4 decoder := decoder{buffer, searchTreeSize + dataSectionSeparatorSize} reader := &Reader{buffer: buffer, decoder: decoder, Metadata: metadata, ipv4Start: 0} reader.ipv4Start, err = reader.startNode() return reader, err } func (r *Reader) startNode() (uint, error) { if r.Metadata.IPVersion != 6 { return 0, nil } nodeCount := r.Metadata.NodeCount node := uint(0) var err error for i := 0; i < 96 && node < nodeCount; i++ { node, err = r.readNode(node, 0) if err != nil { return 0, err } } return node, err } // Lookup takes an IP address as a net.IP structure and a pointer to the // result value to decode into. The result value pointed to must be a data // value that corresponds to a record in the database. This may include a // struct representation of the data, a map capable of holding the data or an // empty interface{} value. // // If result is a pointer to a struct, the struct need not include a field // for every value that may be in the database. If a field is not present in // the structure, the decoder will not decode that field, reducing the time // required to decode the record. // // Currently the decoder expect most data types to correspond exactly (e.g., // a uint64 database type must be decoded into a uint64 Go type). In the // future, this may be made more flexible. func (r *Reader) Lookup(ipAddress net.IP, result interface{}) error { if ipAddress == nil { return errors.New("ipAddress passed to Lookup cannot be nil") } ipV4Address := ipAddress.To4() if ipV4Address != nil { ipAddress = ipV4Address } if len(ipAddress) == 16 && r.Metadata.IPVersion == 4 { return fmt.Errorf("error looking up '%s': you attempted to look up an IPv6 address in an IPv4-only database", ipAddress.String()) } pointer, err := r.findAddressInTree(ipAddress) if pointer == 0 { return err } rv := reflect.ValueOf(result) if rv.Kind() != reflect.Ptr || rv.IsNil() { return errors.New("result param for Lookup must be a pointer") } return r.resolveDataPointer(pointer, rv) } func (r *Reader) findAddressInTree(ipAddress net.IP) (uint, error) { bitCount := uint(len(ipAddress) * 8) var node uint if bitCount == 32 { node = r.ipv4Start } nodeCount := r.Metadata.NodeCount for i := uint(0); i < bitCount && node < nodeCount; i++ { bit := uint(1) & (uint(ipAddress[i>>3]) >> (7 - (i % 8))) var err error node, err = r.readNode(node, bit) if err != nil { return 0, err } } if node == nodeCount { // Record is empty return 0, nil } else if node > nodeCount { return node, nil } return 0, errors.New("invalid node in search tree") } func (r *Reader) readNode(nodeNumber uint, index uint) (uint, error) { RecordSize := r.Metadata.RecordSize baseOffset := nodeNumber * RecordSize / 4 var nodeBytes []byte var prefix uint64 switch RecordSize { case 24: offset := baseOffset + index*3 nodeBytes = r.buffer[offset : offset+3] case 28: prefix = uint64(r.buffer[baseOffset+3]) if index != 0 { prefix &= 0x0F } else { prefix = (0xF0 & prefix) >> 4 } offset := baseOffset + index*4 nodeBytes = r.buffer[offset : offset+3] case 32: offset := baseOffset + index*4 nodeBytes = r.buffer[offset : offset+4] default: return 0, fmt.Errorf("unknown record size: %d", RecordSize) } return uint(uintFromBytes(prefix, nodeBytes)), nil } func (r *Reader) resolveDataPointer(pointer uint, result reflect.Value) error { nodeCount := r.Metadata.NodeCount searchTreeSize := r.Metadata.RecordSize * nodeCount / 4 resolved := pointer - nodeCount + searchTreeSize if resolved > uint(len(r.buffer)) { return errors.New("the MaxMind DB file's search tree is corrupt") } _, err := r.decoder.decode(resolved, result) return err } // Close unmaps the database file from virtual memory and returns the // resources to the system. If called on a Reader opened using FromBytes, // this method does nothing. func (r *Reader) Close() { if r.hasMappedFile { munmap(r.buffer) r.hasMappedFile = false } } maxminddb-golang-0.2.0/reader_test.go000066400000000000000000000254021243276270500175640ustar00rootroot00000000000000package maxminddb import ( "errors" "fmt" "io/ioutil" "math/big" "math/rand" "net" "testing" "time" . "launchpad.net/gocheck" ) func TestMaxMindDbReader(t *testing.T) { TestingT(t) } type MySuite struct{} var _ = Suite(&MySuite{}) func (s *MySuite) TestReader(c *C) { for _, recordSize := range []uint{24, 28, 32} { for _, ipVersion := range []uint{4, 6} { fileName := fmt.Sprintf("test-data/test-data/MaxMind-DB-test-ipv%d-%d.mmdb", ipVersion, recordSize) reader, err := Open(fileName) if err != nil { c.Logf("unexpected error while opening database: %v", err) c.Fail() } checkMetadata(c, reader, ipVersion, recordSize) if ipVersion == 4 { checkIpv4(c, reader) } else { checkIpv6(c, reader) } } } } func (s *MySuite) TestReaderBytes(c *C) { for _, recordSize := range []uint{24, 28, 32} { for _, ipVersion := range []uint{4, 6} { fileName := fmt.Sprintf("test-data/test-data/MaxMind-DB-test-ipv%d-%d.mmdb", ipVersion, recordSize) bytes, _ := ioutil.ReadFile(fileName) reader, err := FromBytes(bytes) if err != nil { c.Logf("unexpected error while opening bytes: %v", err) c.Fail() } checkMetadata(c, reader, ipVersion, recordSize) if ipVersion == 4 { checkIpv4(c, reader) } else { checkIpv6(c, reader) } } } } func (s *MySuite) TestDecodingToInterface(c *C) { reader, err := Open("test-data/test-data/MaxMind-DB-test-decoder.mmdb") if err != nil { c.Logf("unexpected error while opening database: %v", err) c.Fail() } var recordInterface interface{} err = reader.Lookup(net.ParseIP("::1.1.1.0"), &recordInterface) if err != nil { c.Logf("unexpected error while doing lookup: %v", err) c.Fail() } record := recordInterface.(map[string]interface{}) c.Assert(record["array"], DeepEquals, []interface{}{uint64(1), uint64(2), uint64(3)}) c.Assert(record["boolean"], Equals, true) c.Assert(record["bytes"], DeepEquals, []byte{0x00, 0x00, 0x00, 0x2a}) c.Assert(record["double"], Equals, 42.123456) c.Assert(record["float"], Equals, float32(1.1)) c.Assert(record["int32"], Equals, -268435456) c.Assert(record["map"], DeepEquals, map[string]interface{}{ "mapX": map[string]interface{}{ "arrayX": []interface{}{uint64(7), uint64(8), uint64(9)}, "utf8_stringX": "hello", }}) c.Assert(record["uint16"], Equals, uint64(100)) c.Assert(record["uint32"], Equals, uint64(268435456)) c.Assert(record["uint64"], Equals, uint64(1152921504606846976)) c.Assert(record["utf8_string"], Equals, "unicode! ☯ - ♫") bigInt := new(big.Int) bigInt.SetString("1329227995784915872903807060280344576", 10) c.Assert(record["uint128"], DeepEquals, bigInt) } type TestType struct { Array []uint `maxminddb:"array"` Boolean bool `maxminddb:"boolean"` Bytes []byte `maxminddb:"bytes"` Double float64 `maxminddb:"double"` Float float32 `maxminddb:"float"` Int32 int32 `maxminddb:"int32"` Map map[string]interface{} `maxminddb:"map"` Uint16 uint16 `maxminddb:"uint16"` Uint32 uint32 `maxminddb:"uint32"` Uint64 uint64 `maxminddb:"uint64"` Uint128 big.Int `maxminddb:"uint128"` Utf8String string `maxminddb:"utf8_string"` } func (s *MySuite) TestDecoder(c *C) { reader, err := Open("test-data/test-data/MaxMind-DB-test-decoder.mmdb") if err != nil { c.Logf("unexpected error while opening database: %v", err) c.Fail() } var result TestType err = reader.Lookup(net.ParseIP("::1.1.1.0"), &result) if err != nil { c.Log(err) c.Fail() } c.Assert(result.Array, DeepEquals, []uint{uint(1), uint(2), uint(3)}) c.Assert(result.Boolean, Equals, true) c.Assert(result.Bytes, DeepEquals, []byte{0x00, 0x00, 0x00, 0x2a}) c.Assert(result.Double, Equals, 42.123456) c.Assert(result.Float, Equals, float32(1.1)) c.Assert(result.Int32, Equals, int32(-268435456)) c.Assert(result.Map, DeepEquals, map[string]interface{}{ "mapX": map[string]interface{}{ "arrayX": []interface{}{uint64(7), uint64(8), uint64(9)}, "utf8_stringX": "hello", }}) c.Assert(result.Uint16, Equals, uint16(100)) c.Assert(result.Uint32, Equals, uint32(268435456)) c.Assert(result.Uint64, Equals, uint64(1152921504606846976)) c.Assert(result.Utf8String, Equals, "unicode! ☯ - ♫") bigInt := new(big.Int) bigInt.SetString("1329227995784915872903807060280344576", 10) c.Assert(&result.Uint128, DeepEquals, bigInt) reader.Close() } func (s *MySuite) TestIpv6inIpv4(c *C) { reader, err := Open("test-data/test-data/MaxMind-DB-test-ipv4-24.mmdb") if err != nil { c.Logf("unexpected error while opening database: %v", err) c.Fail() } var result TestType err = reader.Lookup(net.ParseIP("2001::"), &result) var emptyResult TestType c.Assert(result, DeepEquals, emptyResult) expected := errors.New("error looking up '2001::': you attempted to look up an IPv6 address in an IPv4-only database") c.Assert(err, DeepEquals, expected) reader.Close() } func (s *MySuite) TestBrokenDatabase(c *C) { reader, err := Open("test-data/test-data/GeoIP2-City-Test-Broken-Double-Format.mmdb") if err != nil { c.Logf("unexpected error while opening database: %v", err) c.Fail() } var result interface{} err = reader.Lookup(net.ParseIP("2001:220::"), &result) expected := errors.New("the MaxMind DB file's data section contains bad data (float 64 size of 2)") c.Assert(err, DeepEquals, expected) reader.Close() } func (s *MySuite) TestMissingDatabase(c *C) { reader, err := Open("file-does-not-exist.mmdb") if reader != nil { c.Log("received reader when doing lookups on DB that doesn't exist") c.Fail() } c.Assert(err, ErrorMatches, "open file-does-not-exist.mmdb.*") } func (s *MySuite) TestNonDatabase(c *C) { reader, err := Open("README.md") if reader != nil { c.Log("received reader when doing lookups on DB that doesn't exist") c.Fail() } c.Assert(err.Error(), Equals, "error opening database file: invalid MaxMind DB file") } func (s *MySuite) TestDecodingToNonPointer(c *C) { reader, _ := Open("test-data/test-data/MaxMind-DB-test-decoder.mmdb") var recordInterface interface{} err := reader.Lookup(net.ParseIP("::1.1.1.0"), recordInterface) c.Assert(err.Error(), Equals, "result param for Lookup must be a pointer") reader.Close() } func (s *MySuite) TestNilLookup(c *C) { reader, _ := Open("test-data/test-data/MaxMind-DB-test-decoder.mmdb") var recordInterface interface{} err := reader.Lookup(nil, recordInterface) c.Assert(err.Error(), Equals, "ipAddress passed to Lookup cannot be nil") reader.Close() } func checkMetadata(c *C, reader *Reader, ipVersion uint, recordSize uint) { metadata := reader.Metadata c.Assert(metadata.BinaryFormatMajorVersion, Equals, uint(2)) c.Assert(metadata.BinaryFormatMinorVersion, Equals, uint(0)) c.Assert(metadata.BuildEpoch, FitsTypeOf, uint(0)) c.Assert(metadata.DatabaseType, Equals, "Test") c.Assert(metadata.Description, DeepEquals, map[string]string{ "en": "Test Database", "zh": "Test Database Chinese", }) c.Assert(metadata.IPVersion, Equals, ipVersion) c.Assert(metadata.Languages, DeepEquals, []string{"en", "zh"}) if ipVersion == 4 { c.Assert(metadata.NodeCount, Equals, uint(37)) } else { c.Assert(metadata.NodeCount, Equals, uint(160)) } c.Assert(metadata.RecordSize, Equals, recordSize) } func checkIpv4(c *C, reader *Reader) { for i := uint(0); i < 6; i++ { address := fmt.Sprintf("1.1.1.%d", uint(1)<>24, (0x00FF0000&num)>>16, (0x0000FF00&num)>>8, 0x000000FF&num)) err := db.Lookup(ip, &result) if err != nil { b.Fatal(err) } } db.Close() } func BenchmarkCountryCode(b *testing.B) { db, err := Open("GeoLite2-City.mmdb") if err != nil { b.Fatal(err) } type MinCountry struct { Country struct { IsoCode string `maxminddb:"iso_code"` } `maxminddb:"country"` } r := rand.New(rand.NewSource(time.Now().UnixNano())) var result MinCountry for i := 0; i < b.N; i++ { num := r.Uint32() ip := net.ParseIP(fmt.Sprintf("%d.%d.%d.%d", (0xFF000000&num)>>24, (0x00FF0000&num)>>16, (0x0000FF00&num)>>8, 0x000000FF&num)) err := db.Lookup(ip, &result) if err != nil { b.Fatal(err) } } db.Close() } maxminddb-golang-0.2.0/reader_unix.go000066400000000000000000000004051243276270500175640ustar00rootroot00000000000000// +build !windows package maxminddb import ( "syscall" ) func mmap(fd int, length int) (data []byte, err error) { return syscall.Mmap(fd, 0, length, syscall.PROT_READ, syscall.MAP_SHARED) } func munmap(b []byte) (err error) { return syscall.Munmap(b) } maxminddb-golang-0.2.0/reader_windows.go000066400000000000000000000033151243276270500202760ustar00rootroot00000000000000// Windows support largely borrowed from mmap-go. // // Copyright 2011 Evan Shaw. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package maxminddb import ( "errors" "os" "reflect" "sync" "syscall" "unsafe" ) type MMap []byte // Windows var handleLock sync.Mutex var handleMap = map[uintptr]syscall.Handle{} func mmap(fd int, length int) (data []byte, err error) { h, errno := syscall.CreateFileMapping(syscall.Handle(fd), nil, uint32(syscall.PAGE_READONLY), 0, uint32(length), nil) if h == 0 { return nil, os.NewSyscallError("CreateFileMapping", errno) } addr, errno := syscall.MapViewOfFile(h, uint32(syscall.FILE_MAP_READ), 0, 0, uintptr(length)) if addr == 0 { return nil, os.NewSyscallError("MapViewOfFile", errno) } handleLock.Lock() handleMap[addr] = h handleLock.Unlock() m := MMap{} dh := m.header() dh.Data = addr dh.Len = length dh.Cap = dh.Len return m, nil } func (m *MMap) header() *reflect.SliceHeader { return (*reflect.SliceHeader)(unsafe.Pointer(m)) } func flush(addr, len uintptr) error { errno := syscall.FlushViewOfFile(addr, len) return os.NewSyscallError("FlushViewOfFile", errno) } func munmap(b []byte) (err error) { m := MMap(b) dh := m.header() addr := dh.Data length := uintptr(dh.Len) flush(addr, length) err = syscall.UnmapViewOfFile(addr) if err != nil { return err } handleLock.Lock() defer handleLock.Unlock() handle, ok := handleMap[addr] if !ok { // should be impossible; we would've errored above return errors.New("unknown base address") } delete(handleMap, addr) e := syscall.CloseHandle(syscall.Handle(handle)) return os.NewSyscallError("CloseHandle", e) } maxminddb-golang-0.2.0/test-data/000077500000000000000000000000001243276270500166175ustar00rootroot00000000000000