diff --git a/ospf6d/ospf6_hook.c b/ospf6d/ospf6_hook.c
new file mode 100644
index 0000000..fc9e185
--- /dev/null
+++ b/ospf6d/ospf6_hook.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2001 Yasuhiro Ohara
+ *
+ * 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.  
+ */
+
+#include <zebra.h>
+
+#include "log.h"
+#include "memory.h"
+
+#include "ospf6_hook.h"
+
+struct ospf6_hook_master neighbor_hook;
+struct ospf6_hook_master interface_hook;
+struct ospf6_hook_master area_hook;
+struct ospf6_hook_master top_hook;
+struct ospf6_hook_master database_hook;
+struct ospf6_hook_master intra_topology_hook;
+struct ospf6_hook_master inter_topology_hook;
+struct ospf6_hook_master route_hook;
+struct ospf6_hook_master redistribute_hook;
+
+static struct ospf6_hook *
+ospf6_hook_create ()
+{
+  struct ospf6_hook *new;
+  new = XMALLOC (MTYPE_OSPF6_OTHER, sizeof (struct ospf6_hook));
+  if (new == NULL)
+    return NULL;
+  memset (new, 0, sizeof (struct ospf6_hook));
+  return new;
+}
+
+static void
+ospf6_hook_delete (struct ospf6_hook *hook)
+{
+  XFREE (MTYPE_OSPF6_OTHER, hook);
+}
+
+static int
+ospf6_hook_issame (struct ospf6_hook *hook1, struct ospf6_hook *hook2)
+{
+  if (hook1->name && hook2->name &&
+      strcmp (hook1->name, hook2->name) != 0)
+    return 0;
+  if (hook1->hook_add != hook2->hook_add)
+    return 0;
+  if (hook1->hook_change != hook2->hook_change)
+    return 0;
+  if (hook1->hook_remove != hook2->hook_remove)
+    return 0;
+  return 1;
+}
+
+void
+ospf6_hook_register (struct ospf6_hook *hook,
+                     struct ospf6_hook_master *master)
+{
+  struct ospf6_hook *new;
+
+  new = ospf6_hook_create ();
+
+  if (hook->name)
+    new->name = strdup (hook->name);
+  new->hook_add = hook->hook_add;
+  new->hook_change = hook->hook_change;
+  new->hook_remove = hook->hook_remove;
+
+  new->prev = master->tail;
+  if (master->tail)
+    master->tail->next = new;
+
+  master->tail = new;
+  if (! master->head)
+    master->head = new;
+
+  master->count++;
+
+  if (IS_OSPF6_DUMP_HOOK)
+    {
+      zlog_info ("HOOK: Register hook%s%s%s%s",
+                 (hook->name ? " " : ""),
+                 (hook->name ? hook->name : ""),
+                 (master->name ? " to " : ""),
+                 (master->name ? master->name : ""));
+    }
+}
+
+void
+ospf6_hook_unregister (struct ospf6_hook *req,
+                       struct ospf6_hook_master *master)
+{
+  struct ospf6_hook *hook;
+
+  for (hook = master->head; hook; hook = hook->next)
+    {
+      if (ospf6_hook_issame (hook, req))
+        break;
+    }
+  if (! hook)
+    return;
+
+  if (hook->prev)
+    hook->prev->next = hook->next;
+  if (hook->next)
+    hook->next->prev = hook->prev;
+  if (master->head == hook)
+    master->head = hook->next;
+  if (master->tail == hook)
+    master->tail = hook->prev;
+
+  master->count--;
+
+  if (IS_OSPF6_DUMP_HOOK)
+    {
+      zlog_info ("HOOK: Unregister hook%s%s%s%s",
+                 (hook->name ? " " : ""),
+                 (hook->name ? hook->name : ""),
+                 (master->name ? " to " : ""),
+                 (master->name ? master->name : ""));
+    }
+
+  if (hook->name)
+    free (hook->name);
+  ospf6_hook_delete (hook);
+}
+
+void
+ospf6_hook_unregister_all (struct ospf6_hook_master *master)
+{
+  struct ospf6_hook *hook, *next;
+
+  for (hook = master->head; hook; hook = next)
+    {
+      next = hook->next;
+      ospf6_hook_delete (hook);
+    }
+
+  master->head = NULL;
+  master->tail = NULL;
+  master->count = 0;
+}
+
+
+void
+ospf6_hook_init ()
+{
+  neighbor_hook.name       =      "Neighbor Hooklist";
+  interface_hook.name      =     "Interface Hooklist";
+  area_hook.name           =          "Area Hooklist";
+  top_hook.name            =           "Top Hooklist";
+  database_hook.name       =      "Database Hooklist";
+  intra_topology_hook.name = "IntraTopology Hooklist";
+  inter_topology_hook.name = "InterTopology Hooklist";
+  route_hook.name          =         "Route Hooklist";
+}
+
+