diff --git a/src/cw/cw_type_bwstr.c b/src/cw/cw_type_bwstr.c
new file mode 100644
index 00000000..03d2df67
--- /dev/null
+++ b/src/cw/cw_type_bwstr.c
@@ -0,0 +1,140 @@
+/*
+ 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 .
+
+*/
+
+#include
+
+#include "format.h"
+#include "cw.h"
+#include "ktv.h"
+
+
+/*typedef uint16_t* bwstr_type;*/
+
+
+static uint16_t * bwstr_create(const uint8_t *data, uint16_t len)
+{
+ uint16_t * str = malloc(2+len*sizeof(uint16_t));
+ if (!str)
+ return 0;
+ *((uint16_t*)str)=len;
+ memcpy(str+2,data,len*2);
+ return str;
+}
+
+
+
+static void del ( struct cw_KTV * data )
+{
+ free ( data->val.ptr );
+}
+
+static struct cw_KTV *get ( struct cw_KTV * data, const uint8_t * src, int len )
+{
+ uint16_t * s;
+ s = bwstr_create ( src, len );
+
+ if ( !s )
+ return NULL;
+
+ data->type = &cw_type_bwstr;
+ data->val.ptr = s;
+ return data;
+}
+
+static int put ( const struct cw_KTV *data, uint8_t * dst )
+{
+ uint16_t len;
+ len = bstr16_len(data->val.ptr);
+
+ return lw_put_data ( dst, data->val.ptr+2,len*2 );
+}
+
+static int to_str ( const struct cw_KTV *data, char *dst, int max_len )
+{
+ char *d;
+ uint16_t *s;
+ const char * komma="";
+ uint16_t i;
+
+ s = (uint16_t*)data->val.ptr;
+ d = dst;
+
+ for (i=0;itype = &cw_type_bstr16;
+ data->val.ptr = s;
+ return data;
+
+}
+
+static int len (cw_KTV_t * data ){
+ return bstr16_len(data->val.ptr);
+}
+
+static void * data(cw_KTV_t * data)
+{
+ return bstr16_data(data->val.ptr);
+}
+
+static const char * get_type_name(cw_KTV_t *data)
+{
+ return CW_TYPE_BSTR16->name;
+}
+
+static int cast(cw_KTV_t * data)
+{
+ if (strcmp(data->type->name,CW_TYPE_BSTR16->name)==0)
+ return 1;
+ if (strcmp(data->type->name,CW_TYPE_STR->name)==0){
+ char *src = data->val.ptr;
+ CW_TYPE_BSTR16->from_str(data,src);
+ free(src);
+ return 1;
+ }
+ return 0;
+}
+
+
+const struct cw_Type cw_type_bwstr = {
+ "Bwstr", /* name */
+ del, /* del */
+ put, /* put */
+ get, /* get */
+ to_str, /* to_str */
+ from_str, /* from_str */
+ len, /* len */
+ data, /* data */
+ get_type_name, /* get_type_name */
+ cast /* cast */
+};
+
+
diff --git a/src/cw/cw_type_bwstr.h b/src/cw/cw_type_bwstr.h
new file mode 100644
index 00000000..b7d81c5c
--- /dev/null
+++ b/src/cw/cw_type_bwstr.h
@@ -0,0 +1,123 @@
+/*
+ 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 .
+
+*/
+
+#include
+
+#include "format.h"
+#include "cw.h"
+#include "ktv.h"
+
+
+static void del ( struct cw_KTV * data )
+{
+ free ( data->val.ptr );
+}
+
+static struct cw_KTV *get ( struct cw_KTV * data, const uint8_t * src, int len )
+{
+ uint8_t * s;
+ s = bstr16_create ( src, len );
+
+ if ( !s )
+ return NULL;
+
+ data->type = &cw_type_bstr16;
+ data->val.ptr = s;
+ return data;
+}
+
+static int put ( const struct cw_KTV *data, uint8_t * dst )
+{
+ return cw_put_bstr16 ( dst, data->val.ptr );
+}
+
+static int to_str ( const struct cw_KTV *data, char *dst, int max_len )
+{
+ char *d;
+ d = dst;
+
+ if ( format_is_utf8 ( bstr16_data ( data->val.ptr ), bstr16_len ( data->val.ptr ) ) ) {
+ d += sprintf ( d, "%.*s", bstr16_len ( data->val.ptr ),
+ bstr16_data ( data->val.ptr ) );
+
+ } else {
+ d += sprintf ( d, ".x" );
+ d += format_hex ( d, bstr16_data ( data->val.ptr ), bstr16_len ( data->val.ptr ) );
+ }
+
+ return d - dst;
+}
+
+static struct cw_KTV *from_str ( struct cw_KTV * data, const char *src )
+{
+ uint8_t * s;
+ s = bstr16_create_from_str(src);
+
+ if ( !s )
+ return NULL;
+
+ data->type = &cw_type_bstr16;
+ data->val.ptr = s;
+ return data;
+
+}
+
+static int len (cw_KTV_t * data ){
+ return bstr16_len(data->val.ptr);
+}
+
+static void * data(cw_KTV_t * data)
+{
+ return bstr16_data(data->val.ptr);
+}
+
+static const char * get_type_name(cw_KTV_t *data)
+{
+ return CW_TYPE_BSTR16->name;
+}
+
+static int cast(cw_KTV_t * data)
+{
+ return 0;
+
+ if (strcmp(data->type->name,CW_TYPE_BSTR16->name)==0)
+ return 1;
+ if (strcmp(data->type->name,CW_TYPE_STR->name)==0){
+ char *src = data->val.ptr;
+ CW_TYPE_BSTR16->from_str(data,src);
+ free(src);
+ return 1;
+ }
+ return 0;
+}
+
+
+const struct cw_Type cw_type_bwstr = {
+ "BWstr", /* name */
+ del, /* del */
+ put, /* put */
+ get, /* get */
+ to_str, /* to_str */
+ from_str, /* from_str */
+ len, /* len */
+ data, /* data */
+ get_type_name, /* get_type_name */
+ cast /* cast */
+};
+
+
diff --git a/src/cw/mavl_freeptr.c b/src/cw/mavl_freeptr.c
new file mode 100644
index 00000000..a1893433
--- /dev/null
+++ b/src/cw/mavl_freeptr.c
@@ -0,0 +1,5 @@
+#include "mavl.h"
+
+void mavl_freeptr(void *ptr){
+ free( *((void**)ptr) );
+}
diff --git a/src/cw/mavl_insert_ptr.c b/src/cw/mavl_insert_ptr.c
new file mode 100644
index 00000000..6eb46b52
--- /dev/null
+++ b/src/cw/mavl_insert_ptr.c
@@ -0,0 +1,10 @@
+#include "mavl.h"
+#include "mavltypes.h"
+
+void *mavl_insert_ptr(mavl_t tree, const void *ptr){
+ void * result;
+ result = mavl_insert(tree,&ptr,NULL);
+ if (result)
+ return *(void**)result;
+ return NULL;
+}