func (this *PacketGeneric) Decompress() (err error) {
if !this.compressed {
return
}
buffer := bytes.NewReader(this.Bytes)
_, err = packet.ReadVarInt(buffer) // compression length
if err != nil {
return
}
zlibReader, err := zlib.NewReader(buffer)
if err != nil {
return
}
_, err = packet.ReadVarInt(zlibReader) // id
if err != nil {
return
}
bytes, err := ioutil.ReadAll(zlibReader)
if err != nil {
return
}
this.Bytes = bytes
this.compressed = false
return
}
func (this *PacketGeneric) SwapEntities(a int32, b int32, clientServer bool, protocol17 bool) {
if a == b {
return
}
if this.id == PACKET_CLIENT_SPAWN_OBJECT && clientServer {
this.Decompress()
buffer := bytes.NewBuffer(this.Bytes)
_, err := packet.ReadVarInt(buffer)
varIntLength := len(this.Bytes) - buffer.Len()
if err == nil && len(this.Bytes) > varIntLength+19 {
objectType := this.Bytes[varIntLength]
if objectType == 60 || objectType == 61 || objectType == 62 || objectType == 63 || objectType == 64 || objectType == 65 || objectType == 66 || objectType == 90 {
id := int32(binary.BigEndian.Uint32(this.Bytes[varIntLength+15 : varIntLength+19]))
if id == a {
binary.BigEndian.PutUint32(this.Bytes[varIntLength+15:varIntLength+19], uint32(b))
} else if id == b {
binary.BigEndian.PutUint32(this.Bytes[varIntLength+15:varIntLength+19], uint32(a))
}
}
}
} else if this.id == PACKET_CLIENT_DESTROY_ENTITIES && clientServer {
this.Decompress()
// TODO
}
this.swapEntitiesInt(a, b, clientServer, protocol17)
this.swapEntitiesVarInt(a, b, clientServer, protocol17)
}
func (this *packetServerPluginMessageCodec) Decode(reader io.Reader, util []byte) (decode packet.Packet, err error) {
packetServerPluginMessage := new(PacketServerPluginMessage)
packetServerPluginMessage.Channel, err = packet.ReadString(reader, util)
if err != nil {
return
}
dataLength, err := packet.ReadVarInt(reader, util)
if err != nil {
return
}
if dataLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Data length is below zero: %d", dataLength))
return
}
if dataLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Data length is above maximum: %d", dataLength))
return
}
packetServerPluginMessage.Data = make([]byte, dataLength)
_, err = reader.Read(packetServerPluginMessage.Data)
if err != nil {
return
}
decode = packetServerPluginMessage
return
}
func (this *PacketGeneric) SwapEntities(a int32, b int32, clientServer bool) {
if a == b {
return
}
if this.id == PACKET_CLIENT_SPAWN_OBJECT && clientServer {
buffer := bytes.NewBuffer(this.Bytes)
bufferUtil := make([]byte, packet.UTIL_BUFFER_LENGTH)
_, err := packet.ReadVarInt(buffer, bufferUtil)
varIntLength := len(this.Bytes) - buffer.Len()
if err == nil && len(this.Bytes) > varIntLength+19 {
objectType := this.Bytes[varIntLength]
if objectType == 60 || objectType == 61 || objectType == 62 || objectType == 63 || objectType == 64 || objectType == 65 || objectType == 66 || objectType == 90 {
id := int32(binary.BigEndian.Uint32(this.Bytes[varIntLength+15 : varIntLength+19]))
if id == a {
binary.BigEndian.PutUint32(this.Bytes[varIntLength+15:varIntLength+19], uint32(b))
} else if id == b {
binary.BigEndian.PutUint32(this.Bytes[varIntLength+15:varIntLength+19], uint32(a))
}
}
}
} else if this.id == PACKET_CLIENT_DESTROY_ENTITIES && clientServer {
// TODO
}
this.SwapEntitiesInt(a, b, clientServer)
this.SwapEntitiesVarInt(a, b, clientServer)
}
func (this *packetClientSetCompressionCodec) Decode(reader io.Reader) (decode packet.Packet, err error) {
packetClientSetCompression := new(PacketClientSetCompression)
packetClientSetCompression.Threshold, err = packet.ReadVarInt(reader)
if err != nil {
return
}
decode = packetClientSetCompression
return
}
func (this *packetClientLoginEncryptRequestCodec) Decode(reader io.Reader) (decode packet.Packet, err error) {
packetClientLoginEncryptRequest := new(PacketClientLoginEncryptRequest)
packetClientLoginEncryptRequest.ServerId, err = packet.ReadString(reader)
if err != nil {
return
}
publicKeyLength, err := packet.ReadVarInt(reader)
if err != nil {
return
}
if publicKeyLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Public key length is below zero: %d", publicKeyLength))
return
}
if publicKeyLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Public key length is above maximum: %d", publicKeyLength))
return
}
packetClientLoginEncryptRequest.PublicKey = make([]byte, publicKeyLength)
_, err = reader.Read(packetClientLoginEncryptRequest.PublicKey)
if err != nil {
return
}
verifyTokenLength, err := packet.ReadVarInt(reader)
if err != nil {
return
}
if verifyTokenLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Verify token length is below zero: %d", verifyTokenLength))
return
}
if verifyTokenLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Verify token length is above maximum: %d", verifyTokenLength))
return
}
packetClientLoginEncryptRequest.VerifyToken = make([]byte, verifyTokenLength)
_, err = reader.Read(packetClientLoginEncryptRequest.VerifyToken)
if err != nil {
return
}
decode = packetClientLoginEncryptRequest
return
}
func (this *PacketServerHandshakeCodec) Decode(reader io.Reader, util []byte) (decode packet.Packet, err error) {
packetServerHandshake := &PacketServerHandshake{}
packetServerHandshake.ProtocolVersion, err = packet.ReadVarInt(reader, util)
if err != nil {
return
}
packetServerHandshake.ServerAddress, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetServerHandshake.ServerPort, err = packet.ReadUint16(reader, util)
if err != nil {
return
}
packetServerHandshake.State, err = packet.ReadVarInt(reader, util)
if err != nil {
return
}
return packetServerHandshake, nil
}
func (this *packetServerHandshakeCodec) Decode(reader io.Reader) (decode packet.Packet, err error) {
packetServerHandshake := new(PacketServerHandshake)
packetServerHandshake.ProtocolVersion, err = packet.ReadVarInt(reader)
if err != nil {
return
}
packetServerHandshake.ServerAddress, err = packet.ReadString(reader)
if err != nil {
return
}
packetServerHandshake.ServerPort, err = packet.ReadUint16(reader)
if err != nil {
return
}
packetServerHandshake.State, err = packet.ReadVarInt(reader)
if err != nil {
return
}
decode = packetServerHandshake
return
}
func (this *packetServerLoginEncryptResponseCodec) Decode(reader io.Reader, util []byte) (decode packet.Packet, err error) {
packetServerLoginEncryptResponse := new(PacketServerLoginEncryptResponse)
sharedSecretLength, err := packet.ReadVarInt(reader, util)
if err != nil {
return
}
if sharedSecretLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Shared secret length is below zero: %d", sharedSecretLength))
return
}
if sharedSecretLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Shared secret length is above maximum: %d", sharedSecretLength))
return
}
packetServerLoginEncryptResponse.SharedSecret = make([]byte, sharedSecretLength)
_, err = reader.Read(packetServerLoginEncryptResponse.SharedSecret)
if err != nil {
return
}
verifyTokenLength, err := packet.ReadVarInt(reader, util)
if err != nil {
return
}
if verifyTokenLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Verify token length is below zero: %d", verifyTokenLength))
return
}
if verifyTokenLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Verify token length is above maximum: %d", verifyTokenLength))
return
}
packetServerLoginEncryptResponse.VerifyToken = make([]byte, verifyTokenLength)
_, err = reader.Read(packetServerLoginEncryptResponse.VerifyToken)
if err != nil {
return
}
decode = packetServerLoginEncryptResponse
return
}
func (this *PacketGeneric) swapEntitiesVarInt(a int32, b int32, clientServer bool, protocol17 bool) {
var positions []bool
if clientServer {
if protocol17 {
positions = PlayPacketClientEntityVarIntPositions17
} else {
positions = PlayPacketClientEntityVarIntPositions
}
} else {
if protocol17 {
positions = PlayPacketServerEntityVarIntPositions17
} else {
positions = PlayPacketServerEntityVarIntPositions
}
}
if this.id < 0 {
return
}
if this.id >= len(positions) {
return
}
if positions[this.id] == false {
return
}
this.Decompress()
// Read the old Id
buffer := bytes.NewBuffer(this.Bytes)
bufferUtil := make([]byte, packet.UTIL_BUFFER_LENGTH)
id, err := packet.ReadVarInt(buffer, bufferUtil)
if err != nil {
return
}
// Check the Id
var newId int
if id == int(a) {
newId = int(b)
} else if id == int(b) {
newId = int(a)
} else {
return
}
// Apply the new Id
newBuffer := new(bytes.Buffer)
err = packet.WriteVarInt(newBuffer, bufferUtil, newId)
if err != nil {
return
}
buffer.WriteTo(newBuffer)
this.Bytes = newBuffer.Bytes()
}
func (this *packetClientPlayerListCodec) Decode(reader io.Reader) (decode packet.Packet, err error) {
packetClientPlayerList := new(PacketClientPlayerList)
packetClientPlayerList.Action, err = packet.ReadVarInt(reader)
if err != nil {
return
}
itemLength, err := packet.ReadVarInt(reader)
if err != nil {
return
}
if itemLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Item length is below zero: %d", itemLength))
return
}
if itemLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Item length is above maximum: %d", itemLength))
return
}
packetClientPlayerList.Items = make([]PacketClientPlayerListItem, itemLength)
for i, _ := range packetClientPlayerList.Items {
item := &packetClientPlayerList.Items[i]
item.UUID, err = packet.ReadUUID(reader)
if err != nil {
return
}
switch packetClientPlayerList.Action {
case PACKET_CLIENT_PLAYER_LIST_ACTION_ADD:
addPlayer := PacketClientPlayerListAddPlayer{}
addPlayer.Name, err = packet.ReadString(reader)
if err != nil {
return
}
var propertiesLength int
propertiesLength, err = packet.ReadVarInt(reader)
if err != nil {
return
}
if propertiesLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Properties length is below zero: %d", propertiesLength))
return
}
if propertiesLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Properties length is above maximum: %d", propertiesLength))
return
}
addPlayer.Properties = make([]PacketClientPlayerListAddPlayerProperty, propertiesLength)
for j, _ := range addPlayer.Properties {
property := &addPlayer.Properties[j]
property.Name, err = packet.ReadString(reader)
if err != nil {
return
}
property.Value, err = packet.ReadString(reader)
if err != nil {
return
}
var signed bool
signed, err = packet.ReadBool(reader)
if err != nil {
return
}
if signed {
property.Signature, err = packet.ReadString(reader)
if err != nil {
return
}
}
}
addPlayer.Gamemode, err = packet.ReadVarInt(reader)
if err != nil {
return
}
addPlayer.Latency, err = packet.ReadVarInt(reader)
if err != nil {
return
}
var hasDisplayName bool
hasDisplayName, err = packet.ReadBool(reader)
if err != nil {
return
}
if hasDisplayName {
addPlayer.DisplayName, err = packet.ReadString(reader)
if err != nil {
return
}
}
item.Info = addPlayer
case PACKET_CLIENT_PLAYER_LIST_ACTION_UPDATE_GAMEMODE:
updateGamemode := PacketClientPlayerListUpdateGamemode{}
updateGamemode.Gamemode, err = packet.ReadVarInt(reader)
if err != nil {
return
}
item.Info = updateGamemode
case PACKET_CLIENT_PLAYER_LIST_ACTION_UPDATE_LATENCY:
updateLatency := PacketClientPlayerListUpdateLatency{}
updateLatency.Latency, err = packet.ReadVarInt(reader)
if err != nil {
return
}
item.Info = updateLatency
case PACKET_CLIENT_PLAYER_LIST_ACTION_UPDATE_DISPLAY_NAME:
updateDisplayName := PacketClientPlayerListUpdateDisplayName{}
var hasDisplayName bool
hasDisplayName, err = packet.ReadBool(reader)
if err != nil {
return
}
if hasDisplayName {
updateDisplayName.DisplayName, err = packet.ReadString(reader)
if err != nil {
return
}
}
item.Info = updateDisplayName
case PACKET_CLIENT_PLAYER_LIST_ACTION_REMOVE:
// no payload
default:
err = errors.New(fmt.Sprintf("Decode, PacketClientPlayerList action is not valid: %d", packetClientPlayerList.Action))
}
}
decode = packetClientPlayerList
return
}
func (this *packetClientTeamsCodec) Decode(reader io.Reader, util []byte) (decode packet.Packet, err error) {
packetClientTeams := new(PacketClientTeams)
packetClientTeams.Name, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetClientTeams.Action, err = packet.ReadInt8(reader, util)
if err != nil {
return
}
if packetClientTeams.Action == 0 || packetClientTeams.Action == 2 {
packetClientTeams.DisplayName, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetClientTeams.Prefix, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetClientTeams.Suffix, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetClientTeams.FriendlyFire, err = packet.ReadInt8(reader, util)
if err != nil {
return
}
packetClientTeams.NameTagVisibility, err = packet.ReadString(reader, util)
if err != nil {
return
}
packetClientTeams.Color, err = packet.ReadInt8(reader, util)
if err != nil {
return
}
}
if packetClientTeams.Action == 0 || packetClientTeams.Action == 3 || packetClientTeams.Action == 4 {
var playersLength int
playersLength, err = packet.ReadVarInt(reader, util)
if err != nil {
return
}
if playersLength < 0 {
err = errors.New(fmt.Sprintf("Decode, Players length is below zero: %d", playersLength))
return
}
if playersLength > 65535 {
err = errors.New(fmt.Sprintf("Decode, Players length is above maximum: %d", playersLength))
return
}
packetClientTeams.Players = make([]string, playersLength)
for i := 0; i < playersLength; i++ {
packetClientTeams.Players[i], err = packet.ReadString(reader, util)
if err != nil {
return
}
}
}
decode = packetClientTeams
return
}
