check versions

cart-packet-queue.go

@@ -12,6 +12,8 @@ type CartPacketQueue struct {
 	expectedPackages map[uint32]*CartListener
 }
 
+const CurrentPacketVersion = 2
+
 type CartListener map[CartId]chan []byte
 
 func NewCartPacketQueue(connection net.Conn) *CartPacketQueue {
@@ -36,6 +38,14 @@ func (p *CartPacketQueue) HandleConnection(connection net.Conn) error {
 			log.Printf("Error receiving packet: %v\n", err)
 			return err
 		}
+		if packet.Version != CurrentPacketVersion {
+			log.Printf("Error receiving packet: %v\n", err)
+			continue
+		}
+		if packet.DataLength == 0 {
+			go p.HandleData(packet.MessageType, packet.Id, []byte{})
+			continue
+		}
 		data, err := GetPacketData(connection, packet.DataLength)
 		if err != nil {
 			log.Printf("Error receiving packet data: %v\n", err)

packet-queue.go

@@ -52,13 +52,22 @@ func (p *PacketQueue) HandleConnection(connection net.Conn) error {
 			log.Printf("Error receiving packet: %v\n", err)
 			return err
 		}
+		if packet.Version != CurrentPacketVersion {
+			log.Printf("Error receiving packet: %v\n", err)
+			continue
+		}
+		if packet.DataLength == 0 {
+			go p.HandleData(packet.MessageType, []byte{})
+			continue
+		}
 		data, err := GetPacketData(connection, packet.DataLength)
 		if err != nil {
 			log.Printf("Error receiving packet data: %v\n", err)
-			return err
-		}
+			//return err
+		} else {
 			go p.HandleData(packet.MessageType, data)
 		}
+	}
 }
 
 func (p *PacketQueue) HandleData(t uint32, data []byte) {

tcp-cart-mux-server.go

@@ -73,7 +73,7 @@ func (m *TCPCartServerMux) handleFunction(connection net.Conn, messageType uint3
 			return true, err
 		}
 		err = binary.Write(connection, binary.LittleEndian, CartPacket{
-			Version:     1,
+			Version:     CurrentPacketVersion,
 			MessageType: responseType,
 			DataLength:  uint64(len(responseData)),
 			Id:          id,

tcp-client.go

@@ -75,7 +75,7 @@ func (m *TCPClient) SendPacket(messageType uint32, data []byte) error {
 		return err
 	}
 	err = binary.Write(m.Conn, binary.LittleEndian, Packet{
-		Version:     1,
+		Version:     CurrentPacketVersion,
 		MessageType: messageType,
 		DataLength:  uint64(len(data)),
 	})

tcp-mux-server.go

@@ -73,7 +73,7 @@ func (m *TCPServerMux) handleFunction(connection net.Conn, messageType uint32, d
 			return true, err
 		}
 		err = binary.Write(connection, binary.LittleEndian, Packet{
-			Version:     1,
+			Version:     CurrentPacketVersion,
 			MessageType: responseType,
 			DataLength:  uint64(len(responseData)),
 		})