Initial commit

target/linux/ath79/generic/base-files/lib/functions/k2t.sh

@@ -0,0 +1,54 @@
+#
+# Copyright (C) 2018 Weijie Gao <hackpascal@gmail.com>
+#
+# Helper function to extract mac addresses from mtd part for Phicomm K2T
+#
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+. /usr/share/libubox/jshn.sh
+
+k2t_config_load() {
+	local mtd_blk=$(find_mtd_part config)
+
+	if [ -z "$mtd_blk" ]; then
+		echo "k2t_config_load: no mtd part named config" >&2
+		exit 1
+	fi
+
+	local json_size=$(dd if=$mtd_blk bs=1 count=8 2>/dev/null)
+
+	json_size="0x$json_size"
+	json_size=$((json_size))
+
+	if [ "$?" -ne 0 ]; then
+		echo "k2t_config_load: invalid json data size" >&2
+		exit 2
+	fi
+
+	if [ "$json_size" -eq 0 ]; then
+		echo "k2t_config_load: empty json data" >&2
+		exit 3
+	fi
+
+	local json_data=$(dd if=$mtd_blk bs=1 skip=8 count=$json_size 2>/dev/null)
+
+	json_load "$json_data"
+}
+
+k2t_get_mac() {
+	local old_ns
+
+	json_set_namespace "k2t" old_ns
+
+	if k2t_config_load; then
+		json_select "this_dev_info"
+		json_get_var val "$1"
+		json_select ..
+	fi
+
+	json_set_namespace old_ns
+
+	echo $val
+}
+