1 files changed, 15 insertions, 0 deletions
diff --git a/protocal/checksum.go b/protocal/checksum.go
new file mode 100644
index 0000000..ce096ff
--- /dev/null
+++ b/protocal/checksum.go
@@ -0,0 +1,15 @@
+// +build !windows
+
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2020 jet tsang zeon-git. All Rights Reserved.
+ */
+package protocal
+
+func CheckSum(checksum []byte) uint8 {
+	var sum uint16 = 0
+	for _, v := range checksum {
+		sum += uint16(v)
+	}
+	return (uint8)(^sum)
+}