add RAW framer for passthrough

internal/framer/framer.go

@@ -21,6 +21,8 @@ func GetFramer(framingType string) (Framer, error) {
 		return NewByteSeparatorFramer([]byte{'\r', '\n'}), nil
 	case "SLIP":
 		return NewSlipFramer(), nil
+	case "RAW":
+		return NewRawFramer(), nil
 	default:
 		return nil, fmt.Errorf("unknown framing method: %s", framingType)
 	}

internal/framer/raw.go

@@ -0,0 +1,23 @@
+package framer
+
+type RawFramer struct{}
+
+func NewRawFramer() *RawFramer {
+	return &RawFramer{}
+}
+
+func (rf *RawFramer) Decode(data []byte) [][]byte {
+	return [][]byte{data}
+}
+
+func (rf *RawFramer) Encode(data []byte) []byte {
+	return data
+}
+
+func (rf *RawFramer) Clear() {
+	// NOTE(jwetzell): no internal state to clear
+}
+
+func (rf *RawFramer) Buffer() []byte {
+	return []byte{}
+}