solidDoWant
73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
package mcproto
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import (
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"bytes"
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"strings"
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"github.com/pkg/errors"
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)
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const invalidPacketDataBytesMsg = "data should be byte slice from Packet.Data"
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// DecodeHandshake takes the Packet.Data bytes and decodes a Handshake message from it
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func DecodeHandshake(data interface{}) (*Handshake, error) {
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dataBytes, ok := data.([]byte)
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if !ok {
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return nil, errors.New(invalidPacketDataBytesMsg)
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}
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handshake := &Handshake{}
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buffer := bytes.NewBuffer(dataBytes)
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var err error
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handshake.ProtocolVersion, err = ReadVarInt(buffer)
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if err != nil {
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return nil, err
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}
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handshake.ServerAddress, err = ReadString(buffer)
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if err != nil {
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return nil, err
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}
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// Forge Mod Loader adds some data after the server address. Truncate it.
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handshake.ServerAddress, _, _ = strings.Cut(handshake.ServerAddress, string(rune(0)))
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handshake.ServerPort, err = ReadUnsignedShort(buffer)
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if err != nil {
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return nil, err
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}
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nextState, err := ReadVarInt(buffer)
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if err != nil {
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return nil, err
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}
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handshake.NextState = State(nextState)
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return handshake, nil
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}
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// DecodeLoginStart takes the Packet.Data bytes and decodes a LoginStart message from it
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func DecodeLoginStart(data interface{}) (*LoginStart, error) {
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dataBytes, ok := data.([]byte)
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if !ok {
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return nil, errors.New(invalidPacketDataBytesMsg)
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}
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loginStart := &LoginStart{}
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buffer := bytes.NewBuffer(dataBytes)
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var err error
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loginStart.Name, err = ReadString(buffer)
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if err != nil {
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return loginStart, errors.Wrap(err, "failed to read username")
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}
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loginStart.PlayerUuid, err = ReadUuid(buffer)
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if err != nil {
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return loginStart, errors.Wrap(err, "failed to read player uuid")
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}
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return loginStart, nil
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}
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