diff --git a/include/proto/port_range.h b/include/proto/port_range.h
new file mode 100644
index 0000000..8c63fac
--- /dev/null
+++ b/include/proto/port_range.h
@@ -0,0 +1,77 @@
+/*
+  include/proto/port_range.h
+  This file defines everything needed to manage port ranges
+
+  Copyright (C) 2000-2009 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_PORT_RANGE_H
+#define _PROTO_PORT_RANGE_H
+
+#include <types/port_range.h>
+
+/* return an available port from range <range>, or zero if none is left */
+static inline int port_range_alloc_port(struct port_range *range)
+{
+	int ret;
+
+	if (!range->avail)
+		return 0;
+	ret = range->ports[range->get];
+	range->get++;
+	if (range->get >= range->size)
+		range->get = 0;
+	range->avail--;
+	return ret;
+}
+
+/* release port <port> into port range <range>. Does nothing if <port> is zero
+ * nor if <range> is null. The caller is responsible for marking the port
+ * unused by either setting the port to zero or the range to NULL.
+ */
+static inline void port_range_release_port(struct port_range *range, int port)
+{
+	if (!port || !range)
+		return;
+
+	range->ports[range->put] = port;
+	range->avail++;
+	range->put++;
+	if (range->put >= range->size)
+		range->put = 0;
+}
+
+/* return a new initialized port range of N ports. The ports are not
+ * filled in, it's up to the caller to do it.
+ */
+static inline struct port_range *port_range_alloc_range(int n)
+{
+	struct port_range *ret;
+	ret = calloc(1, sizeof(struct port_range) +
+		     n * sizeof(((struct port_range *)0)->ports[0]));
+	ret->size = ret->avail = n;
+	return ret;
+}
+
+#endif /* _PROTO_PORT_RANGE_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */