ripng_route.c
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上传日期:2009-11-15
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文件大小:4k
- /*
- * RIPng routes function.
- * Copyright (C) 1998 Kunihiro Ishiguro
- *
- * 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 "prefix.h"
- #include "table.h"
- #include "memory.h"
- #include "if.h"
- #include "ripngd/ripngd.h"
- #include "ripngd/ripng_route.h"
- struct ripng_aggregate *
- ripng_aggregate_new ()
- {
- struct ripng_aggregate *new;
- new = XCALLOC (MTYPE_RIPNG_AGGREGATE, sizeof (struct ripng_aggregate));
- return new;
- }
- void
- ripng_aggregate_free (struct ripng_aggregate *aggregate)
- {
- XFREE (MTYPE_RIPNG_AGGREGATE, aggregate);
- }
- /* Aggregate count increment check. */
- void
- ripng_aggregate_increment (struct route_node *child, struct ripng_info *rinfo)
- {
- struct route_node *np;
- struct ripng_aggregate *aggregate;
- for (np = child; np; np = np->parent)
- if ((aggregate = np->aggregate) != NULL)
- {
- aggregate->count++;
- rinfo->suppress++;
- }
- }
- /* Aggregate count decrement check. */
- void
- ripng_aggregate_decrement (struct route_node *child, struct ripng_info *rinfo)
- {
- struct route_node *np;
- struct ripng_aggregate *aggregate;
- for (np = child; np; np = np->parent)
- if ((aggregate = np->aggregate) != NULL)
- {
- aggregate->count--;
- rinfo->suppress--;
- }
- }
- /* RIPng routes treatment. */
- int
- ripng_aggregate_add (struct prefix *p)
- {
- struct route_node *top;
- struct route_node *rp;
- struct ripng_info *rinfo;
- struct ripng_aggregate *aggregate;
- struct ripng_aggregate *sub;
- /* Get top node for aggregation. */
- top = route_node_get (ripng->table, p);
- /* Allocate new aggregate. */
- aggregate = ripng_aggregate_new ();
- aggregate->metric = 1;
- top->aggregate = aggregate;
- /* Suppress routes match to the aggregate. */
- for (rp = route_lock_node (top); rp; rp = route_next_until (rp, top))
- {
- /* Suppress normal route. */
- if ((rinfo = rp->info) != NULL)
- {
- aggregate->count++;
- rinfo->suppress++;
- }
- /* Suppress aggregate route. This may not need. */
- if (rp != top && (sub = rp->aggregate) != NULL)
- {
- aggregate->count++;
- sub->suppress++;
- }
- }
- return 0;
- }
- /* Delete RIPng static route. */
- int
- ripng_aggregate_delete (struct prefix *p)
- {
- struct route_node *top;
- struct route_node *rp;
- struct ripng_info *rinfo;
- struct ripng_aggregate *aggregate;
- struct ripng_aggregate *sub;
- /* Get top node for aggregation. */
- top = route_node_get (ripng->table, p);
- /* Allocate new aggregate. */
- aggregate = top->aggregate;
- /* Suppress routes match to the aggregate. */
- for (rp = route_lock_node (top); rp; rp = route_next_until (rp, top))
- {
- /* Suppress normal route. */
- if ((rinfo = rp->info) != NULL)
- {
- aggregate->count--;
- rinfo->suppress--;
- }
- if (rp != top && (sub = rp->aggregate) != NULL)
- {
- aggregate->count--;
- sub->suppress--;
- }
- }
- top->aggregate = NULL;
- ripng_aggregate_free (aggregate);
- route_unlock_node (top);
- route_unlock_node (top);
- return 0;
- }