兼容tls1.2握手

增加稳定性

shadow/tls_util.go

@@ -22,10 +22,11 @@ const (
 )
 
 type TLSHeader struct {
-	Type          uint8
-	Version       uint16
-	Length        int
-	HandshakeType uint8
+	Type                 uint8
+	Version              uint16
+	Length               int
+	HandshakeType        uint8
+	ChangeCipherSpecNext uint8
 }
 
 func (t *TLSHeader) toString() string {
@@ -47,6 +48,14 @@ func (t *TLSHeader) toString() string {
 		break
 	case ChangeCipherSpec:
 		desc += "Type=ChangeCipherSpec;"
+		switch t.ChangeCipherSpecNext {
+		case Handshake:
+			desc += "ChangeCipherSpecNext=Handshake;"
+			break
+		case AppData:
+			desc += "ChangeCipherSpecNext=AppData;"
+			break
+		}
 		break
 	case EncryptedAlert:
 		desc += "Type=EncryptedAlert;"
@@ -83,5 +92,8 @@ func ParseAndVerifyTLSHeader(data []byte) *TLSHeader {
 			return nil
 		}
 	}
+	if header.Type == ChangeCipherSpec {
+		header.ChangeCipherSpecNext = data[6]
+	}
 	return header
 }