mirror of
https://github.com/CPunch/gopenfusion.git
synced 2024-11-21 15:00:07 +00:00
can now respond to packets
This commit is contained in:
parent
34ce9a7420
commit
115005b6a3
@ -76,6 +76,15 @@ const (
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EQUIP_SLOT_HAND_EX = 7
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EQUIP_SLOT_VEHICLE = 8
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LOGIN_FAIL_DB_ERROR = 0
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LOGIN_FAIL_ID_ERROR = 1
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LOGIN_FAIL_ID_PW_MATCH_ERROR = 2
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LOGIN_FAIL_DUP_ERROR = 3
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LOGIN_FAIL_VERSION_ERROR = 6
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LOGIN_FAIL_NOT_BETA_ERROR = 7
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LOGIN_FAIL_CN_SERVICE_ERROR = 8
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LOGIN_FAIL_EULA_ERROR = 9
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WPN_EQUIP_TYPE_NONE = 0
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WPN_EQUIP_TYPE_OH_BLADE = 1
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WPN_EQUIP_TYPE_OH_CLUB = 2
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45
protocol/encrypt.go
Normal file
45
protocol/encrypt.go
Normal file
@ -0,0 +1,45 @@
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package protocol
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const (
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E_KEY = "m@rQn~W#"
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KEY_LENGTH = 8
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)
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func encrypt_byte_change_A(ERSize int, data []byte) int {
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var num, num2, num3 int
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for num+ERSize <= len(data) {
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num4 := num + num3
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num5 := num + (ERSize - 1 - num3)
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b := data[num4]
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data[num4] = data[num5]
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data[num5] = b
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num += ERSize
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num3++
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if num3 > ERSize/2 {
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num3 = 0
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}
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}
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num2 = ERSize - (num + ERSize - len(data))
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return num + num2
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}
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func xorData(buff, key []byte, size int) {
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for i := 0; i < size; i++ {
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buff[i] ^= key[i%KEY_LENGTH]
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}
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}
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func EncryptData(buff, key []byte) {
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ERSize := len(buff)%(KEY_LENGTH/2+1)*2 + KEY_LENGTH
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xorData(buff, key, len(buff))
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encrypt_byte_change_A(ERSize, buff)
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}
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func DecryptData(buff, key []byte) {
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ERSize := len(buff)%(KEY_LENGTH/2+1)*2 + KEY_LENGTH
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size := encrypt_byte_change_A(ERSize, buff)
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xorData(buff, key, size)
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}
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@ -23,8 +23,12 @@ type Packet struct {
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const PACK_ALIGN = 4
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func NewPacket(sz int) *Packet {
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newBuf := make([]byte, sz)
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return &Packet{ByteOrder: binary.LittleEndian, Buf: newBuf}
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pkt := &Packet{
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ByteOrder: binary.LittleEndian,
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Buf: make([]byte, sz),
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cursor: 0,
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}
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return pkt
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}
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func (pkt *Packet) ResetCursor() {
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@ -44,6 +48,10 @@ func (pkt *Packet) writeRaw(data []byte) {
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func (pkt *Packet) Write(data []byte) {
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pkt.writeRaw(data)
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if len(pkt.Buf) > CN_PACKET_BUFFER_SIZE {
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panic(fmt.Errorf("Failed to write to packet, invalid size!"))
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}
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}
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func (pkt *Packet) writeByte(data byte) {
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@ -59,7 +67,7 @@ func (pkt *Packet) readRaw(sz int) []byte {
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func (pkt *Packet) Read(sz int) []byte {
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if sz > len(pkt.Buf) {
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panic("Failed to read from packet, invalid size!")
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panic(fmt.Errorf("Failed to read from packet, invalid size!"))
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}
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return pkt.readRaw(sz)
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@ -70,6 +78,8 @@ func (pkt *Packet) readByte() byte {
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}
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func (pkt *Packet) encodeStructField(field reflect.StructField, value reflect.Value) {
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log.Printf("Encoding '%s', current cursor: %d", field.Name, len(pkt.Buf))
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switch field.Type.Kind() {
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case reflect.String: // all strings in fusionfall packets are encoded as utf16, we'll need to encode it
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sz, err := strconv.Atoi(field.Tag.Get("size"))
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@ -77,24 +87,34 @@ func (pkt *Packet) encodeStructField(field reflect.StructField, value reflect.Va
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panic(fmt.Errorf("Failed to grab string 'size' tag!!"))
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}
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sz *= 2
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buf16 := utf16.Encode([]rune(value.String()))
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buf := *(*[]byte)(unsafe.Pointer(&buf16))
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// len(buf16) needs to be the same size as sz
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if len(buf16) > sz {
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// len(buf) needs to be the same size as sz
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if len(buf) > sz {
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// truncate
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buf16 = buf16[:sz]
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buf = buf[:sz]
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} else {
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// grow
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for len(buf16) < sz {
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buf16 = append(buf16, 0)
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for len(buf) < sz {
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buf = append(buf, 0)
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}
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}
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buf := *(*[]byte)(unsafe.Pointer(&buf16))
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log.Printf("sending %d", len(buf))
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pkt.Write(buf)
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default:
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pkt.Encode(value.Addr().Interface())
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}
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// write padding bytes
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pad, err := strconv.Atoi(field.Tag.Get("pad"))
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if err == nil {
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for i := 0; i < pad; i++ {
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pkt.writeByte(0)
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}
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}
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}
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func (pkt *Packet) Encode(data interface{}) {
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@ -150,14 +170,6 @@ func (pkt *Packet) Encode(data interface{}) {
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func (pkt *Packet) decodeStructField(field reflect.StructField, value reflect.Value) {
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log.Printf("Decoding '%s', current cursor: %d", field.Name, pkt.cursor)
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// read padding bytes
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offset, err := strconv.Atoi(field.Tag.Get("offset"))
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if err == nil {
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for pkt.cursor < offset {
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pkt.readByte()
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}
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}
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switch field.Type.Kind() {
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case reflect.String: // all strings in fusionfall packets are encoded as utf16, we'll need to decode it
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sz, err := strconv.Atoi(field.Tag.Get("size"))
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@ -186,6 +198,14 @@ func (pkt *Packet) decodeStructField(field reflect.StructField, value reflect.Va
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default:
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pkt.Decode(value.Addr().Interface())
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}
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// read padding bytes
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pad, err := strconv.Atoi(field.Tag.Get("pad"))
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if err == nil {
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for i := 0; i < pad; i++ {
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pkt.readByte()
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}
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}
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}
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func (pkt *Packet) Decode(data interface{}) {
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@ -10,3 +10,8 @@ type SP_CL2LS_REQ_LOGIN struct {
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Cookie_TEGid [64]uint8
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Cookie_authid [255]uint8
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}
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type SP_LS2CL_REP_LOGIN_FAIL struct {
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ErrorCode int32
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ID string `size:"33" pad:"2"`
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}
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91
server/client.go
Normal file
91
server/client.go
Normal file
@ -0,0 +1,91 @@
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package main
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import (
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"encoding/binary"
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"fmt"
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"log"
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"net"
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"github.com/CPunch/GoFusion/protocol"
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)
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type Client struct {
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server *Server
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conn net.Conn
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key []byte
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}
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func newClient(server *Server, conn net.Conn, key []byte) *Client {
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return &Client{
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server: server,
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conn: conn,
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key: key,
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}
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}
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func (client *Client) Send(data interface{}, typeID uint32) {
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tmp := make([]byte, 4)
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// encode
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pkt := protocol.NewPacket(0)
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pkt.Encode(data)
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// write packet size
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log.Printf("Sending %#v, sizeof: %d", data, len(pkt.Buf))
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binary.LittleEndian.PutUint32(tmp, uint32(len(pkt.Buf)+4))
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if _, err := client.conn.Write(tmp); err != nil {
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panic(fmt.Errorf("[FATAL] failed to write packet size! %v", err))
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}
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// prepend the typeID to the packet body
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binary.LittleEndian.PutUint32(tmp, uint32(typeID))
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pkt.Buf = append(tmp, pkt.Buf...)
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// encrypt body
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protocol.EncryptData(pkt.Buf[:], client.key)
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// write packet body
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if _, err := client.conn.Write(pkt.Buf); err != nil {
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panic(fmt.Errorf("[FATAL] failed to write packet body! %v", err))
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}
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log.Printf("sent!")
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}
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func (client *Client) ClientHandler() {
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defer func() {
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client.conn.Close()
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client.server.unregister <- client
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}()
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tmp := make([]byte, 4)
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for {
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// read packet size
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if _, err := client.conn.Read(tmp); err != nil {
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panic(fmt.Errorf("[FATAL] failed to read packet size! %v", err))
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}
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sz := int(binary.LittleEndian.Uint32(tmp))
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// read packet body
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pkt := protocol.NewPacket(sz)
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if _, err := client.conn.Read(pkt.Buf); err != nil {
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panic(fmt.Errorf("[FATAL] failed to read packet body! %v", err))
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}
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// decrypt && grab typeID
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protocol.DecryptData(pkt.Buf[:], client.key)
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typeID := int(binary.LittleEndian.Uint32(pkt.Read(4)))
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log.Printf("Got packet ID: %x, with a sizeof: %d\n", typeID, len(pkt.Buf))
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pkt.ResetCursor()
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switch typeID {
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case protocol.P_CL2LS_REQ_LOGIN:
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var loginPkt protocol.SP_CL2LS_REQ_LOGIN
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pkt.Decode(&loginPkt)
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log.Printf("Got packet: %#v", loginPkt)
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client.Send(&protocol.SP_LS2CL_REP_LOGIN_FAIL{ErrorCode: protocol.LOGIN_FAIL_VERSION_ERROR, ID: loginPkt.ID}, protocol.P_LS2CL_REP_LOGIN_FAIL)
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default:
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log.Printf("[WARN] unsupported packet ID: %x\n", typeID)
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}
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}
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}
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109
server/server.go
109
server/server.go
@ -1,7 +1,6 @@
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package main
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import (
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"encoding/binary"
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"fmt"
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"log"
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"net"
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@ -9,93 +8,49 @@ import (
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"github.com/CPunch/GoFusion/protocol"
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)
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const (
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E_KEY = "m@rQn~W#"
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KEY_LENGTH = 8
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)
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func encrypt_byte_change_A(ERSize int, data []byte) int {
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var num, num2, num3 int
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for num+ERSize <= len(data) {
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num4 := num + num3
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num5 := num + (ERSize - 1 - num3)
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b := data[num4]
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data[num4] = data[num5]
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data[num5] = b
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num += ERSize
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num3++
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if num3 > ERSize/2 {
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num3 = 0
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}
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}
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num2 = ERSize - (num + ERSize - len(data))
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return num + num2
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type Server struct {
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listener net.Listener
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clients map[*Client]bool
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unregister chan *Client
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}
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func xorData(buff, key []byte, size int) {
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for i := 0; i < size; i++ {
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buff[i] ^= key[i%KEY_LENGTH]
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func newServer() *Server {
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listener, err := net.Listen("tcp", ":23000")
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if err != nil {
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log.Fatal(err)
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}
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return &Server{
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listener: listener,
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clients: make(map[*Client]bool),
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unregister: make(chan *Client),
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}
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}
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func decryptData(buff, key []byte) {
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ERSize := len(buff)%(KEY_LENGTH/2+1)*2 + KEY_LENGTH
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size := encrypt_byte_change_A(ERSize, buff)
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xorData(buff, key, size)
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}
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func (server *Server) Start() {
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log.Print("Server hosted on 127.0.0.1:23000")
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func handle(conn net.Conn) {
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defer func() {
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conn.Close()
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}()
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tmp := make([]byte, 4)
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for {
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// grab packet size
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if _, err := conn.Read(tmp); err != nil {
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panic(fmt.Errorf("[FATAL] failed to read packet size! %v", err))
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}
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sz := int(binary.LittleEndian.Uint32(tmp))
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pkt := protocol.NewPacket(sz)
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if _, err := conn.Read(pkt.Buf); err != nil {
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panic(fmt.Errorf("[FATAL] failed to read packet body! %v", err))
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}
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decryptData(pkt.Buf, []byte(E_KEY))
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typeID := int(binary.LittleEndian.Uint32(pkt.Read(4)))
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sizeof := len(pkt.Buf)
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log.Printf("Got packet ID: %x\n", typeID)
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pkt.ResetCursor()
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switch typeID {
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case protocol.P_CL2LS_REQ_LOGIN:
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var loginPkt protocol.SP_CL2LS_REQ_LOGIN
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pkt.Decode(&loginPkt)
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log.Printf("Got packet: %#v, with a sizeof: %d", loginPkt, sizeof)
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select {
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case client := <-server.unregister:
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delete(server.clients, client)
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fmt.Printf("Client %p disconnected\n", client)
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default:
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log.Printf("[WARN] unsupported packet ID: %x\n", typeID)
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conn, err := server.listener.Accept()
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if err != nil {
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log.Println("Connection error: ", err)
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return
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}
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client := newClient(server, conn, []byte(protocol.E_KEY))
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server.clients[client] = true
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go client.ClientHandler()
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fmt.Printf("Client %p connected\n", client)
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}
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}
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}
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func main() {
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server, err := net.Listen("tcp", ":23000")
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if err != nil {
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log.Fatal(err)
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}
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log.Print("Server hosted on 127.0.0.1:23000")
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for {
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conn, err := server.Accept()
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if err != nil {
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log.Println("Connection error: ", err)
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return
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}
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go handle(conn)
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}
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server := newServer()
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server.Start()
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}
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Loading…
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Block a user