1/* BGP routing table
2   Copyright (C) 1998, 2001 Kunihiro Ishiguro
3
4This file is part of GNU Zebra.
5
6GNU Zebra is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11GNU Zebra is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Zebra; see the file COPYING.  If not, write to the Free
18Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
1902111-1307, USA.  */
20
21#include <zebra.h>
22
23#include "prefix.h"
24#include "memory.h"
25#include "sockunion.h"
26#include "vty.h"
27
28#include "bgpd/bgpd.h"
29#include "bgpd/bgp_table.h"
30
31void
32bgp_table_lock (struct bgp_table *rt)
33{
34  rt->lock++;
35}
36
37void
38bgp_table_unlock (struct bgp_table *rt)
39{
40  assert (rt->lock > 0);
41  rt->lock--;
42
43  if (rt->lock != 0)
44    {
45      return;
46    }
47
48  route_table_finish (rt->route_table);
49  rt->route_table = NULL;
50
51  if (rt->owner)
52    {
53      peer_unlock (rt->owner);
54      rt->owner = NULL;
55    }
56
57  XFREE (MTYPE_BGP_TABLE, rt);
58}
59
60void
61bgp_table_finish (struct bgp_table **rt)
62{
63  if (*rt != NULL)
64    {
65      bgp_table_unlock(*rt);
66      *rt = NULL;
67    }
68}
69
70/*
71 * bgp_node_create
72 */
73static struct route_node *
74bgp_node_create (route_table_delegate_t *delegate, struct route_table *table)
75{
76  struct bgp_node *node;
77  node = XCALLOC (MTYPE_BGP_NODE, sizeof (struct bgp_node));
78  return bgp_node_to_rnode (node);
79}
80
81/*
82 * bgp_node_destroy
83 */
84static void
85bgp_node_destroy (route_table_delegate_t *delegate,
86		  struct route_table *table, struct route_node *node)
87{
88  struct bgp_node *bgp_node;
89  bgp_node = bgp_node_from_rnode (node);
90  XFREE (MTYPE_BGP_NODE, bgp_node);
91}
92
93/*
94 * Function vector to customize the behavior of the route table
95 * library for BGP route tables.
96 */
97route_table_delegate_t bgp_table_delegate = {
98  .create_node = bgp_node_create,
99  .destroy_node = bgp_node_destroy
100};
101
102/*
103 * bgp_table_init
104 */
105struct bgp_table *
106bgp_table_init (afi_t afi, safi_t safi)
107{
108  struct bgp_table *rt;
109
110  rt = XCALLOC (MTYPE_BGP_TABLE, sizeof (struct bgp_table));
111
112  rt->route_table = route_table_init_with_delegate (&bgp_table_delegate);
113
114  /*
115   * Set up back pointer to bgp_table.
116   */
117  rt->route_table->info = rt;
118
119  bgp_table_lock (rt);
120  rt->type = BGP_TABLE_MAIN;
121  rt->afi = afi;
122  rt->safi = safi;
123
124  return rt;
125}
126