1 files changed, 63 insertions, 0 deletions
diff --git a/src/include/dlist.h b/src/include/dlist.h
new file mode 100644
index 0000000..c1bc1d5
--- /dev/null
+++ b/src/include/dlist.h
@@ -0,0 +1,63 @@
+/*
+ *   This program 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 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ *
+ * @file dlist.h
+ * @brief doubly linked lists
+ *
+ * @copyright 2023 Network RADIUS SAS (legal@networkradius.com)
+ */
+
+#ifndef RADIUS_DLIST_H
+#define RADIUS_DLIST_H
+
+RCSIDH(dlist_h, "$Id$")
+
+/*
+ *	We have an internal cache, keyed by (mac + ssid).
+ *
+ *	It returns the PMK and PSK for the user.
+ */
+typedef struct fr_dlist_s fr_dlist_t;
+
+struct fr_dlist_s {
+	fr_dlist_t	*prev;
+	fr_dlist_t	*next;
+};
+
+static inline void fr_dlist_entry_init(fr_dlist_t *entry)
+{
+	entry->prev = entry->next = entry;
+}
+
+static inline CC_HINT(nonnull) void fr_dlist_entry_unlink(fr_dlist_t *entry)
+{
+	entry->prev->next = entry->next;
+	entry->next->prev = entry->prev;
+	entry->prev = entry->next = entry;
+}
+
+static inline CC_HINT(nonnull) void fr_dlist_insert_tail(fr_dlist_t *head, fr_dlist_t *entry)
+{
+	entry->next = head;
+	entry->prev = head->prev;
+	head->prev->next = entry;
+	head->prev = entry;
+}
+
+#endif	/* RADIUS_DLIST_H */