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Packet93Layer.go
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Packet93Layer.go
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package peer
import "fmt"
// Packet93Layer represents ID_DICTIONARY_FORMAT - server -> client
// Response to ID_PROTOCOL_SYNC (Packet90Layer)
type Packet93Layer struct {
ProtocolSchemaSync bool
// Use dictionary compression?
APIDictionaryCompression bool
// Flags set by the server
Params map[string]bool
}
func (thisStream *extendedReader) DecodePacket93Layer(reader PacketReader, layers *PacketLayers) (RakNetPacket, error) {
layer := &Packet93Layer{}
layer.Params = make(map[string]bool)
flags, err := thisStream.ReadByte()
if err != nil {
return layer, err
}
layer.ProtocolSchemaSync = flags&1 == 1
layer.APIDictionaryCompression = flags&2 == 2
if err != nil {
return layer, err
}
numParams, err := thisStream.readUint16BE()
if err != nil {
return layer, err
}
var i uint16
for i = 0; i < numParams; i++ {
nameLen, err := thisStream.readUint16BE()
if err != nil {
return layer, err
}
name, err := thisStream.readString(int(nameLen))
if err != nil {
return layer, err
}
valueLen, err := thisStream.readUint16BE()
if err != nil {
return layer, err
}
value, err := thisStream.readString(int(valueLen))
if err != nil {
return layer, err
}
layer.Params[string(name)] = string(value) == "true"
}
return layer, nil
}
// Serialize implements RakNetPacket.Serialize
func (layer *Packet93Layer) Serialize(writer PacketWriter, stream *extendedWriter) error {
var err error
var flags byte
if layer.ProtocolSchemaSync {
flags |= 1
}
if layer.APIDictionaryCompression {
flags |= 2
}
err = stream.WriteByte(flags)
if err != nil {
return err
}
err = stream.writeUint16BE(uint16(len(layer.Params)))
if err != nil {
return err
}
for name, value := range layer.Params {
err = stream.writeUint16BE(uint16(len(name)))
if err != nil {
return err
}
err = stream.writeASCII(name)
if err != nil {
return err
}
encodedValue := fmt.Sprintf("%v", value)
err = stream.writeUint16BE(uint16(len(encodedValue)))
if err != nil {
return err
}
err = stream.writeASCII(encodedValue)
if err != nil {
return err
}
}
return err
}
func (layer *Packet93Layer) String() string {
return fmt.Sprintf("ID_DICTIONARY_FORMAT: %d flags", len(layer.Params))
}
// TypeString implements RakNetPacket.TypeString()
func (Packet93Layer) TypeString() string {
return "ID_DICTIONARY_FORMAT"
}
// Type implements RakNetPacket.Type()
func (Packet93Layer) Type() byte {
return 0x93
}