diff --git a/src/capwap/bstr_to_str.c b/src/capwap/bstr_to_str.c
new file mode 100644
index 00000000..690e5f76
--- /dev/null
+++ b/src/capwap/bstr_to_str.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "bstr.h"
+#include "cw_util.h"
+
+int bstr_to_str(char *dst, bstr_t str,char * def)
+{
+	if (!str){
+		if (!def) 
+			return 0;
+		return sprintf(dst,"%s",def);
+	}
+
+	int printable = cw_is_printable(bstr_data(str),bstr_len(str));
+	int l=bstr_len(str);
+
+	if (printable){
+		memcpy((char*)dst,bstr_data(str),l);
+		*(dst+l)=0;
+		return l;
+	}
+
+	int i;
+	int c=0;
+	char *s = dst; 
+	for (i=0; i<l; i++){
+		if (!c){
+
+			s += sprintf(s,"%02X",bstr_data(str)[i]);
+			c=1;
+		}
+		else
+			s += sprintf(s,",%02X",bstr_data(str)[i]);
+	}	
+
+	return s-dst;
+}