diff --git a/src/capwap/cw_save_file.c b/src/capwap/cw_save_file.c
index bc8523c1..6cc8a632 100644
--- a/src/capwap/cw_save_file.c
+++ b/src/capwap/cw_save_file.c
@@ -1,8 +1,39 @@
+/*
+ This file is part of libcapwap.
+
+ libcapwap is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ libcapwap is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libcapwap. If not, see .
+
+*/
+
+/**
+ *@file
+ */
+
#include
#include "file.h"
-
+/**
+ * Save data from memory to a file
+ * @param filename file to save data to
+ * @data pointer to data to save
+ * @len number of bytes to save
+ * @return number of bytes saved
+ *
+ * Use ferror to determine if an error has occured, when
+ * the return value (number of bytes written) differs from len.
+ */
int cw_save_file(const char *filename, char *data, int len)
{
FILE *outfile = fopen(filename, "wb");