Can correctly accept faketls messages

mtglib/internal/faketls/record/init.go

@@ -0,0 +1,66 @@
+package record
+
+import "fmt"
+
+type Type uint8
+
+const (
+	TypeChangeCipherSpec Type = 0x14
+	TypeHandshake        Type = 0x16
+	TypeApplicationData  Type = 0x17
+)
+
+func (t Type) String() string {
+	switch t {
+	case TypeChangeCipherSpec:
+		return "changeCipher(0x14)"
+	case TypeHandshake:
+		return "handshake(0x16)"
+	case TypeApplicationData:
+		return "applicationData(0x17)"
+	}
+
+	return fmt.Sprintf("unknown(%#x)", byte(t))
+}
+
+func (t Type) Valid() error {
+	switch t {
+	case TypeChangeCipherSpec, TypeHandshake, TypeApplicationData:
+		return nil
+	}
+
+	return fmt.Errorf("unknown type %#x", byte(t))
+}
+
+type Version uint16
+
+const (
+	Version10 Version = 769 // 0x03 0x01
+	Version11 Version = 770 // 0x03 0x02
+	Version12 Version = 771 // 0x03 0x03
+	Version13 Version = 772 // 0x03 0x04
+)
+
+func (v Version) String() string {
+	switch v {
+	case Version10:
+		return "tls1.0"
+	case Version11:
+		return "tls1.1"
+	case Version12:
+		return "tls1.2"
+	case Version13:
+		return "tls1.3"
+	}
+
+	return fmt.Sprintf("tls(%d)", uint16(v))
+}
+
+func (v Version) Valid() error {
+	switch v {
+	case Version10, Version11, Version12, Version13:
+		return nil
+	}
+
+	return fmt.Errorf("unknown version %d", uint16(v))
+}