ospf6d/ospf6_hook.c

   1 /*
   2  * Copyright (C) 2001 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "log.h"
  25 #include "memory.h"
  26
  27 #include "ospf6_hook.h"
  28
  29 struct ospf6_hook_master neighbor_hook;
  30 struct ospf6_hook_master interface_hook;
  31 struct ospf6_hook_master area_hook;
  32 struct ospf6_hook_master top_hook;
  33 struct ospf6_hook_master database_hook;
  34 struct ospf6_hook_master intra_topology_hook;
  35 struct ospf6_hook_master inter_topology_hook;
  36 struct ospf6_hook_master route_hook;
  37 struct ospf6_hook_master redistribute_hook;
  38
  39 static struct ospf6_hook *
  40 ospf6_hook_create ()
  41 {
  42   struct ospf6_hook *new;
  43   new = XMALLOC (MTYPE_OSPF6_OTHER, sizeof (struct ospf6_hook));
  44   if (new == NULL)
  45     return NULL;
  46   memset (new, 0, sizeof (struct ospf6_hook));
  47   return new;
  48 }
  49
  50 static void
  51 ospf6_hook_delete (struct ospf6_hook *hook)
  52 {
  53   XFREE (MTYPE_OSPF6_OTHER, hook);
  54 }
  55
  56 static int
  57 ospf6_hook_issame (struct ospf6_hook *hook1, struct ospf6_hook *hook2)
  58 {
  59   if (hook1->name && hook2->name &&
  60       strcmp (hook1->name, hook2->name) != 0)
  61     return 0;
  62   if (hook1->hook_add != hook2->hook_add)
  63     return 0;
  64   if (hook1->hook_change != hook2->hook_change)
  65     return 0;
  66   if (hook1->hook_remove != hook2->hook_remove)
  67     return 0;
  68   return 1;
  69 }
  70
  71 void
  72 ospf6_hook_register (struct ospf6_hook *hook,
  73                      struct ospf6_hook_master *master)
  74 {
  75   struct ospf6_hook *new;
  76
  77   new = ospf6_hook_create ();
  78
  79   if (hook->name)
  80     new->name = strdup (hook->name);
  81   new->hook_add = hook->hook_add;
  82   new->hook_change = hook->hook_change;
  83   new->hook_remove = hook->hook_remove;
  84
  85   new->prev = master->tail;
  86   if (master->tail)
  87     master->tail->next = new;
  88
  89   master->tail = new;
  90   if (! master->head)
  91     master->head = new;
  92
  93   master->count++;
  94
  95   if (IS_OSPF6_DUMP_HOOK)
  96     {
  97       zlog_info ("HOOK: Register hook%s%s%s%s",
  98                  (hook->name ? " " : ""),
  99                  (hook->name ? hook->name : ""),
 100                  (master->name ? " to " : ""),
 101                  (master->name ? master->name : ""));
 102     }
 103 }
 104
 105 void
 106 ospf6_hook_unregister (struct ospf6_hook *req,
 107                        struct ospf6_hook_master *master)
 108 {
 109   struct ospf6_hook *hook;
 110
 111   for (hook = master->head; hook; hook = hook->next)
 112     {
 113       if (ospf6_hook_issame (hook, req))
 114         break;
 115     }
 116   if (! hook)
 117     return;
 118
 119   if (hook->prev)
 120     hook->prev->next = hook->next;
 121   if (hook->next)
 122     hook->next->prev = hook->prev;
 123   if (master->head == hook)
 124     master->head = hook->next;
 125   if (master->tail == hook)
 126     master->tail = hook->prev;
 127
 128   master->count--;
 129
 130   if (IS_OSPF6_DUMP_HOOK)
 131     {
 132       zlog_info ("HOOK: Unregister hook%s%s%s%s",
 133                  (hook->name ? " " : ""),
 134                  (hook->name ? hook->name : ""),
 135                  (master->name ? " to " : ""),
 136                  (master->name ? master->name : ""));
 137     }
 138
 139   if (hook->name)
 140     free (hook->name);
 141   ospf6_hook_delete (hook);
 142 }
 143
 144 void
 145 ospf6_hook_unregister_all (struct ospf6_hook_master *master)
 146 {
 147   struct ospf6_hook *hook, *next;
 148
 149   for (hook = master->head; hook; hook = next)
 150     {
 151       next = hook->next;
 152       ospf6_hook_delete (hook);
 153     }
 154
 155   master->head = NULL;
 156   master->tail = NULL;
 157   master->count = 0;
 158 }
 159
 160
 161 void
 162 ospf6_hook_init ()
 163 {
 164   neighbor_hook.name       =      "Neighbor Hooklist";
 165   interface_hook.name      =     "Interface Hooklist";
 166   area_hook.name           =          "Area Hooklist";
 167   top_hook.name            =           "Top Hooklist";
 168   database_hook.name       =      "Database Hooklist";
 169   intra_topology_hook.name = "IntraTopology Hooklist";
 170   inter_topology_hook.name = "InterTopology Hooklist";
 171   route_hook.name          =         "Route Hooklist";
 172 }
 173
 174