diff --git a/src/capwap/strheap.c b/src/capwap/strheap.c
new file mode 100644
index 00000000..dc9612f3
--- /dev/null
+++ b/src/capwap/strheap.c
@@ -0,0 +1,37 @@
+
+#include "strheap.h"
+
+
+static int cmp(const void *v1,const void*v2)
+{
+	return ((struct cw_str *)v1)->id - ((struct cw_str *)v2)->id;
+}
+
+static void del(void* d)
+{
+	return;
+}
+
+cw_strheap_t cw_strheap_create()
+{
+	return avltree_create(cmp,del);	
+}
+
+const char * cw_strheap_add(cw_strheap_t t, struct cw_str *s)
+{
+	avltree_del(t,s);
+	return avltree_add(t,s);
+}
+
+int cw_strheap_register_strings(cw_strheap_t h, struct cw_str *s) 
+{
+	int n=0;
+	while ( s->id!=0){
+		cw_strheap_add(h,s);
+		s++;
+		n++;
+	}
+	cw_strheap_add(h,s);
+	return n+1;
+}
+
diff --git a/src/capwap/strheap.h b/src/capwap/strheap.h
new file mode 100644
index 00000000..cc0397b0
--- /dev/null
+++ b/src/capwap/strheap.h
@@ -0,0 +1,30 @@
+#ifndef __STRHEAP_H
+#define __STRHEAP_H
+
+#include <stdint.h>
+
+#include "avltree.h"
+
+
+typedef struct avltree * cw_strheap_t;
+
+struct cw_str {
+	uint32_t id;
+	const char *str;
+};
+
+extern cw_strheap_t cw_strheap_create();
+extern int cw_strheap_register_strings(cw_strheap_t h, struct cw_str *s);
+
+static inline const char * cw_strheap_get(cw_strheap_t h, int id) {
+	struct cw_str s, *rc;
+	s.id=id;
+	rc = avltree_get(h,&s);
+	if (rc)
+		return rc->str;
+	return cw_strheap_get(h,0);
+}
+
+
+
+#endif