Geoff Bourne
cc590524c4
Also * Added decode of LoginStart message * Add metrics backend constants * Updated usage section * Documented MaxFrameLength
83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
package mcproto
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import (
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"fmt"
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"github.com/google/uuid"
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)
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type Frame struct {
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Length int
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Payload []byte
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}
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type State int
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/*
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Handshaking -> Status
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Handshaking -> Login -> ...
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*/
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const (
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StateHandshaking State = 0
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StateStatus State = 1
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StateLogin State = 2
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)
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var trimLimit = 64
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func trimBytes(data []byte) ([]byte, string) {
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if len(data) < trimLimit {
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return data, ""
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} else {
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return data[:trimLimit], "..."
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}
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}
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func (f *Frame) String() string {
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trimmed, cont := trimBytes(f.Payload)
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return fmt.Sprintf("Frame:[len=%d, payload=%#X%s]", f.Length, trimmed, cont)
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}
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type Packet struct {
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Length int
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PacketID int
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// Data is either a byte slice of raw content or a decoded message
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Data interface{}
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}
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func (p *Packet) String() string {
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if dataBytes, ok := p.Data.([]byte); ok {
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trimmed, cont := trimBytes(dataBytes)
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return fmt.Sprintf("Frame:[len=%d, packetId=%d, data=%#X%s]", p.Length, p.PacketID, trimmed, cont)
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} else {
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return fmt.Sprintf("Frame:[len=%d, packetId=%d, data=%+v]", p.Length, p.PacketID, p.Data)
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}
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}
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const (
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PacketIdHandshake = 0x00
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PacketIdLogin = 0x00 // during StateLogin
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PacketIdLegacyServerListPing = 0xFE
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)
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type Handshake struct {
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ProtocolVersion int
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ServerAddress string
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ServerPort uint16
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NextState State
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}
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type LoginStart struct {
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Name string
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PlayerUuid uuid.UUID
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}
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type LegacyServerListPing struct {
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ProtocolVersion int
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ServerAddress string
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ServerPort uint16
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}
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type ByteReader interface {
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ReadByte() (byte, error)
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}
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