diff --git a/src/cw/bstr16_create_from_cfgstr.c b/src/cw/bstr16_create_from_cfgstr.c
new file mode 100644
index 00000000..262f19eb
--- /dev/null
+++ b/src/cw/bstr16_create_from_cfgstr.c
@@ -0,0 +1,89 @@
+/*
+ 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 Foobar. If not, see .
+
+*/
+
+/**
+ * @file
+ * @brief bstr_create_from_cfgstr function
+ */
+
+#include
+#include
+#include
+
+#include "bstr.h"
+
+
+/**
+ * Create a bstr16_t string from a string read from config file.
+ *
+ * @param s String from config file.
+ * @return The create bstr_t string.
+ *
+ * The string from config file is an ASCII-text which is interpreted
+ * as hexadecimal string if it starts with ".x"
+ *
+ * @see bstr16_t
+ */
+uint8_t * bstr16_create_from_cfgstr(const char * s)
+{
+ int l = strlen(s);
+
+
+ if (s[0]!='.')
+ return bstr16_create((uint8_t*)s,l);
+
+ if (l<=2)
+ return bstr16_create((uint8_t*)s,l);
+
+ if (s[1]=='.')
+ return bstr16_create((uint8_t*)s+1,l-1);
+
+ if (s[1]=='x'){
+ uint8_t * ns=0;
+ int len=0;
+
+ int ch,cl;
+ const char *ss = s+2;
+ int rc ;
+ do {
+ rc = sscanf(ss,"%01X",&ch);
+ if (rc!=1)
+ break;
+ ss++;
+ rc = sscanf(ss,"%01X",&cl);
+ if (rc!=1)
+ cl=0;
+ ss++;
+ int c=(ch<<4) | cl;
+
+ len++;
+ ns = realloc(ns,len);
+ ns[len-1]=c;
+
+
+ }while (rc==1);
+
+
+ return bstr16_create(ns,len);
+
+ }
+
+ return NULL;
+}
+
+