366 lines
8.6 KiB
Go
366 lines
8.6 KiB
Go
package utils
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import (
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"context"
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"net"
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"os"
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"strings"
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"sync"
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"time"
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"github.com/bedrock-tool/bedrocktool/locale"
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"github.com/sandertv/gophertunnel/minecraft"
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"github.com/sandertv/gophertunnel/minecraft/protocol"
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"github.com/sandertv/gophertunnel/minecraft/protocol/login"
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"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
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"github.com/sandertv/gophertunnel/minecraft/resource"
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"github.com/sirupsen/logrus"
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)
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var DisconnectReason = "Connection lost"
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type dummyProto struct {
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id int32
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ver string
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}
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func (p dummyProto) ID() int32 { return p.id }
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func (p dummyProto) Ver() string { return p.ver }
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func (p dummyProto) Packets() packet.Pool { return packet.NewPool() }
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func (p dummyProto) ConvertToLatest(pk packet.Packet, _ *minecraft.Conn) []packet.Packet {
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return []packet.Packet{pk}
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}
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func (p dummyProto) ConvertFromLatest(pk packet.Packet, _ *minecraft.Conn) []packet.Packet {
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return []packet.Packet{pk}
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}
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type (
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PacketFunc func(header packet.Header, payload []byte, src, dst net.Addr)
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PacketCallback func(pk packet.Packet, toServer bool, timeReceived time.Time) (packet.Packet, error)
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ClientConnectCallback func(hasClient bool)
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ConnectCallback func(err error) bool
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IngameCommand struct {
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Exec func(cmdline []string) bool
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Cmd protocol.Command
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}
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)
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type ProxyContext struct {
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Server *minecraft.Conn
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Client *minecraft.Conn
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Listener *minecraft.Listener
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commands map[string]IngameCommand
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AlwaysGetPacks bool
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WithClient bool
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IgnoreDisconnect bool
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CustomClientData *login.ClientData
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// called for every packet
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PacketFunc PacketFunc
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// called after client connected
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OnClientConnect ClientConnectCallback
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// called after game started
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ConnectCB ConnectCallback
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// called on every packet after login
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PacketCB PacketCallback
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}
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func NewProxy() (*ProxyContext, error) {
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p := &ProxyContext{
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commands: make(map[string]IngameCommand),
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WithClient: true,
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IgnoreDisconnect: false,
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}
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if Options.PathCustomUserData != "" {
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if err := p.LoadCustomUserData(Options.PathCustomUserData); err != nil {
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return nil, err
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}
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}
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return p, nil
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}
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func (p *ProxyContext) AddCommand(cmd IngameCommand) {
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p.commands[cmd.Cmd.Name] = cmd
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}
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type CustomClientData struct {
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// skin things
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CapeFilename string
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SkinFilename string
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SkinGeometryFilename string
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SkinID string
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PlayFabID string
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PersonaSkin bool
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PremiumSkin bool
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TrustedSkin bool
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ArmSize string
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SkinColour string
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// misc
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IsEditorMode bool
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LanguageCode string
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DeviceID string
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}
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func (p *ProxyContext) LoadCustomUserData(path string) error {
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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var customData CustomClientData
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err = json.NewDecoder(f).Decode(&customData)
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if err != nil {
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return err
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}
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p.CustomClientData = &login.ClientData{
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SkinID: customData.SkinID,
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PlayFabID: customData.PlayFabID,
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PersonaSkin: customData.PersonaSkin,
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PremiumSkin: customData.PremiumSkin,
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TrustedSkin: customData.TrustedSkin,
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ArmSize: customData.ArmSize,
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SkinColour: customData.SkinColour,
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}
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if customData.SkinFilename != "" {
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img, err := loadPng(customData.SkinFilename)
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if err != nil {
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return err
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}
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p.CustomClientData.SkinData = base64.RawStdEncoding.EncodeToString(img.Pix)
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p.CustomClientData.SkinImageWidth = img.Rect.Dx()
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p.CustomClientData.SkinImageHeight = img.Rect.Dy()
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}
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if customData.CapeFilename != "" {
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img, err := loadPng(customData.CapeFilename)
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if err != nil {
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return err
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}
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p.CustomClientData.CapeData = base64.RawStdEncoding.EncodeToString(img.Pix)
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p.CustomClientData.CapeImageWidth = img.Rect.Dx()
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p.CustomClientData.CapeImageHeight = img.Rect.Dy()
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}
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if customData.SkinGeometryFilename != "" {
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data, err := os.ReadFile(customData.SkinGeometryFilename)
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if err != nil {
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return err
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}
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p.CustomClientData.SkinGeometry = base64.RawStdEncoding.EncodeToString(data)
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}
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p.CustomClientData.DeviceID = customData.DeviceID
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return nil
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}
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func (p *ProxyContext) ClientWritePacket(pk packet.Packet) error {
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if p.Client == nil {
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return nil
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}
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return p.Client.WritePacket(pk)
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}
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func (p *ProxyContext) SendMessage(text string) {
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p.ClientWritePacket(&packet.Text{
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TextType: packet.TextTypeSystem,
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Message: "§8[§bBedrocktool§8]§r " + text,
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})
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}
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func (p *ProxyContext) SendPopup(text string) {
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p.ClientWritePacket(&packet.Text{
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TextType: packet.TextTypePopup,
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Message: text,
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})
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}
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func (p *ProxyContext) CommandHandlerPacketCB(pk packet.Packet, toServer bool, _ time.Time) (packet.Packet, error) {
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switch _pk := pk.(type) {
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case *packet.CommandRequest:
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cmd := strings.Split(_pk.CommandLine, " ")
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name := cmd[0][1:]
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if h, ok := p.commands[name]; ok {
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if h.Exec(cmd[1:]) {
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pk = nil
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}
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}
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case *packet.AvailableCommands:
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cmds := make([]protocol.Command, len(p.commands))
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for _, ic := range p.commands {
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cmds = append(cmds, ic.Cmd)
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}
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pk = &packet.AvailableCommands{
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Constraints: _pk.Constraints,
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Commands: append(_pk.Commands, cmds...),
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}
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}
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return pk, nil
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}
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func (p *ProxyContext) proxyLoop(ctx context.Context, toServer bool, packetCBs []PacketCallback) error {
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var c1, c2 *minecraft.Conn
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if toServer {
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c1 = p.Client
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c2 = p.Server
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} else {
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c1 = p.Server
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c2 = p.Client
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}
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for {
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if ctx.Err() != nil {
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return ctx.Err()
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}
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pk, err := c1.ReadPacket()
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if err != nil {
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return err
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}
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for _, packetCB := range packetCBs {
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pk, err = packetCB(pk, toServer, time.Now())
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if err != nil {
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return err
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}
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}
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if pk != nil && c2 != nil {
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if err := c2.WritePacket(pk); err != nil {
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if disconnect, ok := errors.Unwrap(err).(minecraft.DisconnectError); ok {
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DisconnectReason = disconnect.Error()
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}
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return err
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}
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}
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}
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}
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func (p *ProxyContext) Run(ctx context.Context, serverAddress string) (err error) {
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if strings.HasPrefix(serverAddress, "PCAP!") {
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return createReplayConnection(ctx, serverAddress[5:], p)
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}
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GetTokenSource() // ask for login before listening
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var cdp *login.ClientData = nil
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if p.WithClient {
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var packs []*resource.Pack
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if Options.Preload {
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logrus.Info(locale.Loc("preloading_packs", nil))
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var serverConn *minecraft.Conn
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serverConn, err = connectServer(ctx, serverAddress, nil, true, nil)
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if err != nil {
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err = fmt.Errorf(locale.Loc("failed_to_connect", locale.Strmap{"Address": serverAddress, "Err": err}))
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return
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}
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serverConn.Close()
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packs = serverConn.ResourcePacks()
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logrus.Infof(locale.Locm("pack_count_loaded", locale.Strmap{"Count": len(packs)}, len(packs)))
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}
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_status := minecraft.NewStatusProvider("Server")
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p.Listener, err = minecraft.ListenConfig{
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StatusProvider: _status,
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ResourcePacks: packs,
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AcceptedProtocols: []minecraft.Protocol{
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//dummyProto{id: 567, ver: "1.19.60"},
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},
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}.Listen("raknet", ":19132")
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if err != nil {
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return err
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}
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go func() {
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<-ctx.Done()
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if p.Client != nil {
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p.Listener.Disconnect(p.Client, DisconnectReason)
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}
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p.Listener.Close()
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}()
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logrus.Infof(locale.Loc("listening_on", locale.Strmap{"Address": p.Listener.Addr()}))
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logrus.Infof(locale.Loc("help_connect", nil))
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c, err := p.Listener.Accept()
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if err != nil {
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return err
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}
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p.Client = c.(*minecraft.Conn)
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cd := p.Client.ClientData()
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cdp = &cd
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}
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if p.OnClientConnect != nil {
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p.OnClientConnect(p.WithClient)
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}
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if p.CustomClientData != nil {
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cdp = p.CustomClientData
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}
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p.Server, err = connectServer(ctx, serverAddress, cdp, p.AlwaysGetPacks, p.PacketFunc)
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if err != nil {
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if p.ConnectCB != nil {
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if p.ConnectCB(err) {
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err = nil
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}
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}
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err = fmt.Errorf(locale.Loc("failed_to_connect", locale.Strmap{"Address": serverAddress, "Err": err}))
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return err
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}
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defer p.Server.Close()
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// spawn and start the game
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if err = spawnConn(ctx, p.Client, p.Server); err != nil {
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err = fmt.Errorf(locale.Loc("failed_to_spawn", locale.Strmap{"Err": err}))
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return err
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}
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if p.ConnectCB != nil {
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if !p.ConnectCB(nil) {
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return errors.New("Cancelled")
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}
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}
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wg := sync.WaitGroup{}
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var cbs []PacketCallback
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cbs = append(cbs, p.CommandHandlerPacketCB)
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if p.PacketCB != nil {
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cbs = append(cbs, p.PacketCB)
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}
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// server to client
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wg.Add(1)
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go func() {
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defer wg.Done()
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if err := p.proxyLoop(ctx, false, cbs); err != nil {
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logrus.Error(err)
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return
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}
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}()
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// client to server
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if p.Client != nil {
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wg.Add(1)
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go func() {
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defer wg.Done()
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if err := p.proxyLoop(ctx, true, cbs); err != nil {
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logrus.Error(err)
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return
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}
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}()
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}
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wg.Wait()
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return err
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}
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