/* $OpenBSD: area.c,v 1.9 2009/01/07 21:16:36 claudio Exp $ */ /* * Copyright (c) 2004, 2005 Esben Norby * * 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 #include #include #include #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); SIMPLEQ_INIT(&area->redist_list); return (area); } int area_del(struct area *area) { struct iface *iface = NULL; struct vertex *v, *nv; struct rde_nbr *n; struct redistribute *r; /* 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); } while ((r = SIMPLEQ_FIRST(&area->redist_list)) != NULL) { SIMPLEQ_REMOVE_HEAD(&area->redist_list, entry); free(r); } 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("area_track: 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); } u_int8_t area_ospf_options(struct area *area) { u_int8_t opt = 0; if (area && !area->stub) opt |= OSPF_OPTION_E; return (opt); }