diff --git a/src/capwap/avliter_next.c b/src/capwap/avliter_next.c
new file mode 100644
index 00000000..e6f48abc
--- /dev/null
+++ b/src/capwap/avliter_next.c
@@ -0,0 +1,43 @@
+#include "avltree.h"
+
+
+void * avliter_next(avliter_t *i)
+{
+
+	while ( i->stack_ptr) {
+		i->stack_ptr--;
+		i->cur=i->stack[i->stack_ptr];
+			
+		if (!i->cur)
+			continue;
+
+		if ((i->stack_ptr)&1) {
+			return i->cur->data;
+		}
+		break;		
+
+	}
+
+
+	if (!i->cur){
+		return NULL;
+	}
+
+	while(i->cur->left) {
+		/* push right branch */
+		i->stack[i->stack_ptr++]=i->cur->right;
+		
+		/* push node */
+		i->stack[i->stack_ptr++]=i->cur;
+
+
+		i->cur=i->cur->left;
+
+	}
+
+	i->stack[i->stack_ptr++]=i->cur->right;
+
+	return i->cur->data;
+}
+
+