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/* $OpenBSD: area.c,v 1.4 2008/12/28 20:08:31 claudio Exp $ */ |
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/* |
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* Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/tree.h> |
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#include <err.h> |
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#include <stdlib.h> |
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#include "ospf6.h" |
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#include "ospf6d.h" |
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#include "ospfe.h" |
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#include "rde.h" |
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#include "log.h" |
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struct area * |
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area_new(void) |
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{ |
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struct area *area = NULL; |
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if ((area = calloc(1, sizeof(*area))) == NULL) |
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errx(1, "area_new: calloc"); |
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LIST_INIT(&area->iface_list); |
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LIST_INIT(&area->nbr_list); |
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RB_INIT(&area->lsa_tree); |
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return (area); |
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} |
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int |
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area_del(struct area *area) |
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{ |
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struct iface *iface = NULL; |
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struct vertex *v, *nv; |
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struct rde_nbr *n; |
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/* area is removed so neutralize the demotion done by the area */ |
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if (area->active == 0) |
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ospfe_demote_area(area, 1); |
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/* clean lists */ |
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while ((iface = LIST_FIRST(&area->iface_list)) != NULL) { |
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LIST_REMOVE(iface, entry); |
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if_del(iface); |
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} |
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while ((n = LIST_FIRST(&area->nbr_list)) != NULL) |
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rde_nbr_del(n); |
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for (v = RB_MIN(lsa_tree, &area->lsa_tree); v != NULL; v = nv) { |
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nv = RB_NEXT(lsa_tree, &area->lsa_tree, v); |
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vertex_free(v); |
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} |
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free(area); |
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return (0); |
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} |
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struct area * |
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area_find(struct ospfd_conf *conf, struct in_addr area_id) |
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{ |
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struct area *area; |
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LIST_FOREACH(area, &conf->area_list, entry) { |
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if (area->id.s_addr == area_id.s_addr) { |
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return (area); |
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} |
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} |
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return (NULL); |
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} |
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void |
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area_track(struct area *area, int state) |
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{ |
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int old = area->active; |
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if (state & NBR_STA_FULL) |
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area->active++; |
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else if (area->active == 0) |
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fatalx("area_track: area already inactive"); |
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else |
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area->active--; |
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if (area->active == 0 || old == 0) |
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ospfe_demote_area(area, old == 0); |
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} |
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int |
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area_border_router(struct ospfd_conf *conf) |
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{ |
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struct area *area; |
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int active = 0; |
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LIST_FOREACH(area, &conf->area_list, entry) |
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if (area->active > 0) |
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active++; |
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return (active > 1); |
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} |
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u_int32_t |
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area_ospf_options(struct area *area) |
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{ |
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u_int32_t opt = OSPF_OPTION_V6 | OSPF_OPTION_R; |
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if (area && !area->stub) |
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opt |= OSPF_OPTION_E; |
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return opt; |
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} |