From 718f55018076a6a7e772b6ffec643a3ac98a7b99 Mon Sep 17 00:00:00 2001
From: Sudo-Ivan <ivan@quad4.io>
Date: Thu, 1 Jan 2026 00:59:24 -0600
Subject: [PATCH] feat: add KISS protocol escape functions in new kiss.go
 interface

---
 pkg/interfaces/kiss.go | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 pkg/interfaces/kiss.go

diff --git a/pkg/interfaces/kiss.go b/pkg/interfaces/kiss.go
new file mode 100644
index 0000000..6f6a5bd
--- /dev/null
+++ b/pkg/interfaces/kiss.go
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: 0BSD
+// Copyright (c) 2024-2026 Sudo-Ivan / Quad4.io
+package interfaces
+
+const (
+	KISS_FEND  = 0xC0
+	KISS_FESC  = 0xDB
+	KISS_TFEND = 0xDC
+	KISS_TFESC = 0xDD
+)
+
+func escapeKISS(data []byte) []byte {
+	escaped := make([]byte, 0, len(data)*2)
+	for _, b := range data {
+		if b == KISS_FEND {
+			escaped = append(escaped, KISS_FESC, KISS_TFEND)
+		} else if b == KISS_FESC {
+			escaped = append(escaped, KISS_FESC, KISS_TFESC)
+		} else {
+			escaped = append(escaped, b)
+		}
+	}
+	return escaped
+}
+