diff --git a/include/proto/hdr_idx.h b/include/proto/hdr_idx.h
new file mode 100644
index 0000000..881a3eb
--- /dev/null
+++ b/include/proto/hdr_idx.h
@@ -0,0 +1,62 @@
+/*
+  include/proto/hdr_idx.h
+  This file defines function prototypes for fast header indexation.
+
+  Copyright (C) 2000-2006 Willy Tarreau - w@1wt.eu
+  
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation, version 2.1
+  exclusively.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef _PROTO_HDR_IDX_H
+#define _PROTO_HDR_IDX_H
+
+#include <common/config.h>
+#include <types/hdr_idx.h>
+
+/*
+ * Initialize the list pointers.
+ * list->size must already be set. If list->size is set and list->v is
+ * non-null, list->v is also initialized..
+ */
+static inline void hdr_idx_init(struct hdr_idx *list)
+{
+	if (list->size && list->v) {
+		register struct hdr_idx_elem e = { .len=0, .cr=0, .next=0};
+		list->v[0] = e;
+	}
+	list->tail = 0;
+	list->used = list->last = 1;
+}
+
+/*
+ * Add a header entry to <list> after element <after>. <after> is ignored when
+ * the list is empty or full. Common usage is to set <after> to list->tail.
+ *
+ * Returns the position of the new entry in the list (from 1 to size-1), or 0
+ * if the array is already full. An effort is made to fill the array linearly,
+ * but once the last entry has been used, we have to search for unused blocks,
+ * which takes much more time. For this reason, it's important to size is
+ * appropriately.
+ */
+int hdr_idx_add(int len, int cr, struct hdr_idx *list, int after);
+
+#endif /* _PROTO_HDR_IDX_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */