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/* $OpenBSD: area.c,v 1.6 2007/06/13 17:23:36 claudio Exp $ */
/*
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/tree.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <stdlib.h>
#include "ospf.h"
#include "ospfd.h"
#include "ospfe.h"
#include "rde.h"
#include "log.h"
struct area *
area_new(void)
{
struct area *area = NULL;
if ((area = calloc(1, sizeof(*area))) == NULL)
errx(1, "area_new: calloc");
LIST_INIT(&area->iface_list);
LIST_INIT(&area->nbr_list);
RB_INIT(&area->lsa_tree);
return (area);
}
int
area_del(struct area *area)
{
struct iface *iface = NULL;
struct vertex *v, *nv;
struct rde_nbr *n;
/* area is removed so neutralize the demotion done by the area */
if (area->active == 0)
ospfe_demote_area(area, 1);
/* clean lists */
while ((iface = LIST_FIRST(&area->iface_list)) != NULL) {
LIST_REMOVE(iface, entry);
if_del(iface);
}
while ((n = LIST_FIRST(&area->nbr_list)) != NULL)
rde_nbr_del(n);
for (v = RB_MIN(lsa_tree, &area->lsa_tree); v != NULL; v = nv) {
nv = RB_NEXT(lsa_tree, &area->lsa_tree, v);
vertex_free(v);
}
free(area);
return (0);
}
struct area *
area_find(struct ospfd_conf *conf, struct in_addr area_id)
{
struct area *area;
LIST_FOREACH(area, &conf->area_list, entry) {
if (area->id.s_addr == area_id.s_addr) {
return (area);
}
}
return (NULL);
}
void
area_track(struct area *area, int state)
{
int old = area->active;
if (state & NBR_STA_FULL)
area->active++;
else if (area->active == 0)
fatalx("king bula sez: area already inactive");
else
area->active--;
if (area->active == 0 || old == 0)
ospfe_demote_area(area, old == 0);
}
int
area_border_router(struct ospfd_conf *conf)
{
struct area *area;
int active = 0;
LIST_FOREACH(area, &conf->area_list, entry)
if (area->active > 0)
active++;
return (active > 1);
}
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