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f9c1b7bb9b
* lib/table.[ch]
- Add a macro (ROUTE_NODE_FIELDS) that expands to all the fields
of a route_node structure.
- Add the route_table_delegate_t structure, a function vector
which allows clients to customize the behavior of one or more
tables.
The delegate currently contains the 'create_node' and
'destroy_node' functions, and hence enables a table to use an
alternative node structure. The alternative node is expected to
embed the fields of a route_node using ROUTE_NODE_FIELDS.
- Add route_table_init_with_delegate() to create a new table with
a given delegate.
- Make route_table_init() a thin wrapper around
route_table_init_with_delegate(). The delegate it passes in
simply creates/destroys route_node structures as before.
- Add a user data pointer (info) to the route_table
structure. This can be used by a client to keep per-table state.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
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* Routing Table
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* Copyright (C) 1998 Kunihiro Ishiguro
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_TABLE_H
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#define _ZEBRA_TABLE_H
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/*
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* Forward declarations.
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*/
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struct route_node;
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struct route_table;
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/*
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* route_table_delegate_t
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*
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* Function vector that can be used by a client to customize the
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* behavior of one or more route tables.
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*/
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typedef struct route_table_delegate_t_ route_table_delegate_t;
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typedef struct route_node * (*route_table_create_node_func_t)
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(route_table_delegate_t *, struct route_table *);
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typedef void (*route_table_destroy_node_func_t)
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(route_table_delegate_t *, struct route_table *, struct route_node *);
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struct route_table_delegate_t_
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{
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route_table_create_node_func_t create_node;
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route_table_destroy_node_func_t destroy_node;
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};
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/* Routing table top structure. */
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struct route_table
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{
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struct route_node *top;
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/*
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* Delegate that performs certain functions for this table.
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*/
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route_table_delegate_t *delegate;
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unsigned long count;
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/*
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* User data.
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*/
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void *info;
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};
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/*
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* Macro that defines all fields in a route node.
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*/
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#define ROUTE_NODE_FIELDS \
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/* Actual prefix of this radix. */ \
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struct prefix p; \
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\
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/* Tree link. */ \
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struct route_table *table; \
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struct route_node *parent; \
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struct route_node *link[2]; \
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\
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/* Lock of this radix */ \
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unsigned int lock; \
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\
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/* Each node of route. */ \
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void *info; \
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\
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/* Aggregation. */ \
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void *aggregate;
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/* Each routing entry. */
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struct route_node
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{
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ROUTE_NODE_FIELDS;
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#define l_left link[0]
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#define l_right link[1]
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};
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/* Prototypes. */
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extern struct route_table *route_table_init (void);
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extern struct route_table *
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route_table_init_with_delegate (route_table_delegate_t *);
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extern void route_table_finish (struct route_table *);
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extern void route_unlock_node (struct route_node *node);
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extern struct route_node *route_top (struct route_table *);
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extern struct route_node *route_next (struct route_node *);
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extern struct route_node *route_next_until (struct route_node *,
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struct route_node *);
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extern struct route_node *route_node_get (struct route_table *const,
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struct prefix *);
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extern struct route_node *route_node_lookup (const struct route_table *,
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struct prefix *);
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extern struct route_node *route_lock_node (struct route_node *node);
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extern struct route_node *route_node_match (const struct route_table *,
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const struct prefix *);
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extern struct route_node *route_node_match_ipv4 (const struct route_table *,
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const struct in_addr *);
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#ifdef HAVE_IPV6
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extern struct route_node *route_node_match_ipv6 (const struct route_table *,
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const struct in6_addr *);
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#endif /* HAVE_IPV6 */
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extern unsigned long route_table_count (const struct route_table *);
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#endif /* _ZEBRA_TABLE_H */
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