1 files changed, 109 insertions, 0 deletions
diff --git a/ospf6d/ospf6_damp.h b/ospf6d/ospf6_damp.h
new file mode 100644
index 00000000..19bdbc7a
--- /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 ();
+