fix: possible packet issues

pkg/protocol/packet/login/server/codecs.go

@@ -64,7 +64,7 @@ func (c *LoginCustomQueryAnswer) ReadFrom(r io.Reader) (n int64, err error) {
 		return n, err
 	}
 	if c.HasData {
-		temp, err = (*packet.ByteArray)(&c.Data).ReadFrom(r)
+		temp, err = (*packet.PluginMessageData)(&c.Data).ReadFrom(r)
 		n += temp
 		if err != nil {
 			return n, err
@@ -86,7 +86,7 @@ func (c LoginCustomQueryAnswer) WriteTo(w io.Writer) (n int64, err error) {
 		return n, err
 	}
 	if c.HasData {
-		temp, err = (*packet.ByteArray)(&c.Data).WriteTo(w)
+		temp, err = (*packet.PluginMessageData)(&c.Data).WriteTo(w)
 		n += temp
 		if err != nil {
 			return n, err

pkg/protocol/packet/login/server/custom_query_answer.go

@@ -7,7 +7,7 @@ type LoginCustomQueryAnswer struct {
 	MessageID int32 `mc:"VarInt"`
 	HasData   bool
 	//opt:optional:HasData
-	Data []byte `mc:"ByteArray"`
+	Data []byte `mc:"PluginMessageData"`
 }
 
 func (*LoginCustomQueryAnswer) PacketID() packetid.ServerboundPacketID {

pkg/protocol/packet/login/server/packet.go

@@ -17,3 +17,11 @@ var packetRegistry = make(map[packetid.ServerboundPacketID]serverPacketCreator)
 func registerPacket(id packetid.ServerboundPacketID, creator serverPacketCreator) {
 	packetRegistry[id] = creator
 }
+
+func CreatePacket(id packetid.ServerboundPacketID) (ServerboundPacket, bool) {
+	creator, ok := packetRegistry[id]
+	if !ok {
+		return nil, false
+	}
+	return creator(), true
+}