Initial revision
diff --git a/ospf6d/ospf6_damp.h b/ospf6d/ospf6_damp.h
new file mode 100644
index 0000000..19bdbc7
--- /dev/null
+++ b/ospf6d/ospf6_damp.h
@@ -0,0 +1,109 @@
+/*
+ * OSPF flap dampening by Manav Bhatia
+ * Copyright (C) 2002
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+/*
+ * Flap Damping (target e.g. link/route)
+ */
+
+#define HAVE_OSPF6_DAMP
+
+typedef enum
+{
+ OFF,
+ ON,
+} onoff_t;
+
+typedef enum
+{
+ event_none,
+ event_up,
+ event_down,
+} damp_event_t;
+
+/* Structure maintained per target basis */
+struct ospf6_damp_info
+{
+ /* identifier to decide which target */
+ u_short type;
+ struct prefix name;
+
+ /* do we damping this info */
+ onoff_t damping;
+
+ u_int penalty;
+ u_int flap;
+ time_t t_start; /* First flap (down event) time */
+ time_t t_updated; /* Last time the penalty was updated */
+
+ /* index and double-link for reuse list */
+ int index;
+ struct ospf6_damp_info *next;
+ struct ospf6_damp_info *prev;
+
+ /* the last event that we are avoiding */
+ int (*event) (void *target);
+ void *target;
+ damp_event_t event_type;
+ damp_event_t target_status;
+};
+
+#define OSPF6_DAMP_TYPE_ROUTE 0
+#define OSPF6_DAMP_TYPE_MAX 1
+
+/* Global Configuration Parameters */
+struct ospf6_damp_config
+{
+ /* is damping enabled ? */
+ onoff_t enabled;
+
+ /* configurable parameters */
+ u_int half_life;
+ u_int suppress;
+ u_int reuse;
+ u_int t_hold; /* Maximum hold down time */
+
+ /* Non configurable parameters */
+ u_int delta_t;
+ u_int delta_reuse;
+ u_int default_penalty;
+ u_int ceiling; /* Max value a penalty can attain */
+ double scale_factor;
+
+ int decay_array_size; /* Calculated using config parameters */
+ double *decay_array; /* Storage for decay values */
+
+ int reuse_index_array_size; /* Size of reuse index array */
+ int *reuse_index_array;
+
+ int reuse_list_size; /* Number of reuse lists */
+ struct ospf6_damp_info **reuse_list_array;
+};
+
+int ospf6_damp_reuse_timer (struct thread *);
+void ospf6_damp_event_up (u_short type, struct prefix *name,
+ int (*exec_up) (void *), void *target);
+void ospf6_damp_event_down (u_short type, struct prefix *name,
+ int (*exec_down) (void *), void *target);
+
+void ospf6_damp_config_write (struct vty *);
+void ospf6_damp_init ();
+