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protocol/packet: don't panic, return errors
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parent
f1552830a0
commit
857250bf33
@ -178,7 +178,7 @@ func (db *DBHandler) GetPlayer(PlayerID int) (*Player, error) {
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&plr.SkywayLocationFlag, &plr.CurrentMissionID, &plr.FirstUseFlag,
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&plr.Body, &plr.EyeColor, &plr.FaceStyle, &plr.Gender, &plr.HairColor, &plr.HairStyle,
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&plr.Height, &plr.SkinColor); err != nil {
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panic(err)
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return nil, err
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}
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}
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@ -4,7 +4,6 @@ import (
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"encoding/binary"
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"fmt"
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"io"
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"log"
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"reflect"
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"strconv"
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"unicode/utf16"
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@ -25,14 +24,14 @@ func NewPacket(readWriter io.ReadWriter) Packet {
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}
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}
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func (pkt Packet) encodeStructField(field reflect.StructField, value reflect.Value) {
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log.Printf("Encoding '%s'", field.Name)
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func (pkt Packet) encodeStructField(field reflect.StructField, value reflect.Value) error {
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// log.Printf("Encoding '%s'", field.Name)
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switch field.Type.Kind() {
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case reflect.String: // all strings in fusionfall packets are encoded as utf16, we'll need to encode it
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sz, err := strconv.Atoi(field.Tag.Get("size"))
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if err != nil {
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panic(fmt.Errorf("Failed to grab string 'size' tag!!"))
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return fmt.Errorf("Failed to grab string 'size' tag!!")
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}
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buf16 := utf16.Encode([]rune(value.String()))
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@ -50,21 +49,29 @@ func (pkt Packet) encodeStructField(field reflect.StructField, value reflect.Val
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}
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// write
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binary.Write(pkt.readWriter, binary.LittleEndian, buf16)
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if err := binary.Write(pkt.readWriter, binary.LittleEndian, buf16); err != nil {
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return err
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}
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default:
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pkt.Encode(value.Addr().Interface())
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if err := pkt.Encode(value.Addr().Interface()); err != nil {
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return err
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}
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}
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// write padding bytes
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pad, err := strconv.Atoi(field.Tag.Get("pad"))
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if err == nil {
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for i := 0; i < pad; i++ {
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pkt.readWriter.Write([]byte{0})
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if _, err := pkt.readWriter.Write([]byte{0}); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (pkt Packet) Encode(data interface{}) {
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func (pkt Packet) Encode(data interface{}) error {
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rv := reflect.Indirect(reflect.ValueOf(data))
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switch rv.Kind() {
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@ -72,26 +79,34 @@ func (pkt Packet) Encode(data interface{}) {
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// walk through each struct fields
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sz := rv.NumField()
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for i := 0; i < sz; i++ {
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pkt.encodeStructField(rv.Type().Field(i), rv.Field(i))
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if err := pkt.encodeStructField(rv.Type().Field(i), rv.Field(i)); err != nil {
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return err
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}
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}
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default:
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// we pass everything else to go's binary package
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binary.Write(pkt.readWriter, binary.LittleEndian, data)
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if err := binary.Write(pkt.readWriter, binary.LittleEndian, data); err != nil {
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return err
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}
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}
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return nil
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}
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func (pkt Packet) decodeStructField(field reflect.StructField, value reflect.Value) {
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log.Printf("Decoding '%s'", field.Name)
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func (pkt Packet) decodeStructField(field reflect.StructField, value reflect.Value) error {
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// log.Printf("Decoding '%s'", field.Name)
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switch field.Type.Kind() {
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case reflect.String: // all strings in fusionfall packets are encoded as utf16, we'll need to decode it
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sz, err := strconv.Atoi(field.Tag.Get("size"))
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if err != nil {
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panic(fmt.Errorf("Failed to grab string 'size' tag!!"))
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return fmt.Errorf("Failed to grab string 'size' tag!!")
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}
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buf16 := make([]uint16, sz)
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binary.Read(pkt.readWriter, binary.LittleEndian, buf16)
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if err := binary.Read(pkt.readWriter, binary.LittleEndian, buf16); err != nil {
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return err
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}
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// find null terminator
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var realSize int
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@ -103,19 +118,25 @@ func (pkt Packet) decodeStructField(field reflect.StructField, value reflect.Val
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value.SetString(string(utf16.Decode(buf16[:realSize])))
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default:
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pkt.Decode(value.Addr().Interface())
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if err := pkt.Decode(value.Addr().Interface()); err != nil {
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return err
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}
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}
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// consume padding bytes
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pad, err := strconv.Atoi(field.Tag.Get("pad"))
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if err == nil {
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for i := 0; i < pad; i++ {
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pkt.readWriter.Read([]byte{0})
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if _, err := pkt.readWriter.Read([]byte{0}); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (pkt Packet) Decode(data interface{}) {
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func (pkt Packet) Decode(data interface{}) error {
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rv := reflect.Indirect(reflect.ValueOf(data))
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switch rv.Kind() {
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@ -123,9 +144,15 @@ func (pkt Packet) Decode(data interface{}) {
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// walk through each struct fields
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sz := rv.NumField()
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for i := 0; i < sz; i++ {
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pkt.decodeStructField(rv.Type().Field(i), rv.Field(i))
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if err := pkt.decodeStructField(rv.Type().Field(i), rv.Field(i)); err != nil {
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return err
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}
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}
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default:
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binary.Read(pkt.readWriter, binary.LittleEndian, data)
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if err := binary.Read(pkt.readWriter, binary.LittleEndian, data); err != nil {
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return err
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}
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}
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return nil
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}
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