support CPE

2 files changed, 29 insertions, 7 deletions

diff --git a/classic/cpe.go b/classic/cpe.go
new file mode 100644
index 0000000..222ec74
--- /dev/null
+++ b/classic/cpe.go
@@ -0,0 +1,17 @@
+package classic
+
+type ExtInfo struct {
+	AppName String
+	ExtensionCount int16
+}
+func (e *ExtInfo) PacketId() byte {
+	return 0x10
+}
+
+type ExtEntry struct {
+	ExtName String
+	Version int32
+}
+func (e *ExtEntry) PacketId() byte {
+	return 0x11
+}
diff --git a/classic/packets.go b/classic/packets.go
index c1f650e..48ea80d 100644
--- a/classic/packets.go
+++ b/classic/packets.go
@@ -21,6 +21,10 @@ const (
 	NonOpUser = 0x00
 	OpUser = 0x64
 )
+const (
+	NoCpe = 0x00
+	UseCpe = 0x42
+)
 
 type PlayerId struct {
 	Version byte
@@ -161,7 +165,7 @@ func (p *UpdateUserType) PacketId() byte {
 	return 0x0f
 }
 
-func createPacketType(packetId byte, client bool) Packet {
+func createPacketType(packetId byte, client bool, ext map[string]bool) Packet {
 	switch packetId {
 	case 0x00:
 		if client {
@@ -188,7 +192,8 @@ func createPacketType(packetId byte, client bool) Packet {
 	}
 }
 
-func readPacket(rd io.Reader, client bool) (Packet, error) {
+func readPacket(
+		rd io.Reader, client bool, ext map[string]bool) (Packet, error) {
 	var b [1]byte
 	_, err := io.ReadFull(rd, b[:])
 	if err != nil {
@@ -196,7 +201,7 @@ func readPacket(rd io.Reader, client bool) (Packet, error) {
 	}
 	packetId := b[0]
 
-	packet := createPacketType(packetId, client)
+	packet := createPacketType(packetId, client, ext)
 	if packet == nil {
 		return nil, fmt.Errorf("Unknown packet type: 0x%02x", packetId)
 	}
@@ -207,12 +212,12 @@ func readPacket(rd io.Reader, client bool) (Packet, error) {
 	return packet, nil
 }
 
-func SReadPacket(rd io.Reader) (Packet, error) {
-	return readPacket(rd, false)
+func SReadPacket(rd io.Reader, ext map[string]bool) (Packet, error) {
+	return readPacket(rd, false, ext)
 }
 
-func CReadPacket(rd io.Reader) (Packet, error) {
-	return readPacket(rd, true)
+func CReadPacket(rd io.Reader, ext map[string]bool) (Packet, error) {
+	return readPacket(rd, true, ext)
 }
 
 func WritePacket(wr io.Writer, packet Packet) error {