197 lines
4.3 KiB
Go
197 lines
4.3 KiB
Go
package main
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import (
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"bufio"
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"context"
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"encoding/json"
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"fmt"
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"log"
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"net"
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"os"
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"regexp"
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"strings"
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"github.com/sandertv/gophertunnel/minecraft"
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"github.com/sandertv/gophertunnel/minecraft/auth"
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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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"golang.org/x/oauth2"
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)
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func send_popup(conn *minecraft.Conn, text string) {
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conn.WritePacket(&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 get_token() oauth2.Token {
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var token oauth2.Token
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if _, err := os.Stat(TOKEN_FILE); err == nil {
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f, err := os.Open(TOKEN_FILE)
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if err != nil {
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panic(err)
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}
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defer f.Close()
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if err := json.NewDecoder(f).Decode(&token); err != nil {
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panic(err)
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}
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} else {
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token, err := auth.RequestLiveToken()
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if err != nil {
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panic(err)
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}
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buf, err := json.Marshal(token)
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if err != nil {
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panic(err)
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}
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os.WriteFile(TOKEN_FILE, buf, 0666)
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}
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return token
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}
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func server_input(server string) (address, name string, err error) {
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if server == "" { // no arg provided, interactive input
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fmt.Printf("Enter Server: ")
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reader := bufio.NewReader(os.Stdin)
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server, _ = reader.ReadString('\n')
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r, _ := regexp.Compile(`[\n\r]`)
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server = string(r.ReplaceAll([]byte(server), []byte("")))
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}
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if strings.HasPrefix(server, "realm:") { // for realms use api to get ip address
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name, address, err = get_realm(strings.Split(server, ":")[1])
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if err != nil {
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return "", "", err
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}
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} else {
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// if an actual server address if given
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// add port if necessary
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address = server
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if len(strings.Split(address, ":")) == 1 {
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address += ":19132"
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}
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name = server_url_to_name(address)
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}
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return address, name, nil
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}
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func server_url_to_name(server string) string {
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host, _, err := net.SplitHostPort(server)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Invalid server: %s\n", err)
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os.Exit(1)
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}
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return host
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}
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func connect_server(ctx context.Context, address string, ClientData *login.ClientData) (serverConn *minecraft.Conn, err error) {
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var packet_func func(header packet.Header, payload []byte, src, dst net.Addr) = nil
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if G_debug {
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packet_func = PacketLogger
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}
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cd := login.ClientData{}
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if ClientData != nil {
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cd = *ClientData
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}
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fmt.Printf("Connecting to %s\n", address)
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serverConn, err = minecraft.Dialer{
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TokenSource: G_src,
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ClientData: cd,
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PacketFunc: packet_func,
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}.DialContext(ctx, "raknet", address)
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if err != nil {
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return nil, err
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}
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return serverConn, nil
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}
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func spawn_conn(ctx context.Context, clientConn *minecraft.Conn, serverConn *minecraft.Conn) error {
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errs := make(chan error, 2)
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go func() {
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errs <- clientConn.StartGame(serverConn.GameData())
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}()
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go func() {
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errs <- serverConn.DoSpawn()
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}()
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// wait for both to finish
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for i := 0; i < 2; i++ {
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select {
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case err := <-errs:
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if err != nil {
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return fmt.Errorf("failed to start game: %s", err)
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}
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case <-ctx.Done():
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return fmt.Errorf("connection cancelled")
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}
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}
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return nil
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}
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func create_proxy(ctx context.Context, server_address string) (l *minecraft.Listener, clientConn, serverConn *minecraft.Conn, err error) {
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_status := minecraft.NewStatusProvider("Server")
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listener, err := minecraft.ListenConfig{
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StatusProvider: _status,
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}.Listen("raknet", ":19132")
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if err != nil {
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return nil, nil, nil, err
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}
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l = listener
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fmt.Printf("Listening on %s\n", listener.Addr())
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c, err := listener.Accept()
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if err != nil {
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log.Fatal(err)
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}
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clientConn = c.(*minecraft.Conn)
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cd := clientConn.ClientData()
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serverConn, err = connect_server(ctx, server_address, &cd)
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if err != nil {
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return nil, nil, nil, fmt.Errorf("failed to connect to %s: %s", server_address, err)
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}
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if err := spawn_conn(ctx, clientConn, serverConn); err != nil {
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return nil, nil, nil, fmt.Errorf("failed to spawn: %s", err)
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}
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G_exit = append(G_exit, func() {
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serverConn.Close()
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listener.Disconnect(clientConn, "Closing")
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clientConn.Close()
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listener.Close()
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})
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return l, clientConn, serverConn, nil
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}
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var PrivateIPNetworks = []net.IPNet{
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{
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IP: net.ParseIP("10.0.0.0"),
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Mask: net.CIDRMask(8, 32),
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},
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{
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IP: net.ParseIP("172.16.0.0"),
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Mask: net.CIDRMask(12, 32),
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},
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{
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IP: net.ParseIP("192.168.0.0"),
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Mask: net.CIDRMask(16, 32),
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},
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}
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func IPPrivate(ip net.IP) bool {
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for _, ipNet := range PrivateIPNetworks {
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if ipNet.Contains(ip) {
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return true
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}
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}
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return false
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}
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