static int process_summary_lsa (struct ospf_area *area, struct route_table *rt, struct route_table *rtrs, struct ospf_lsa *lsa) { struct ospf *ospf = area->ospf; struct ospf_area_range *range; struct ospf_route *abr_or, *new_or; struct summary_lsa *sl; struct prefix_ipv4 p, abr; u_int32_t metric; if (lsa == NULL) return 0; sl = (struct summary_lsa *) lsa->data; if (IS_DEBUG_OSPF_EVENT) zlog_debug ("process_summary_lsa(): LS ID: %s", inet_ntoa (sl->header.id)); metric = GET_METRIC (sl->metric); if (metric == OSPF_LS_INFINITY) return 0; if (IS_LSA_MAXAGE (lsa)) return 0; if (ospf_lsa_is_self_originated (area->ospf, lsa)) return 0; p.family = AF_INET; p.prefix = sl->header.id; if (sl->header.type == OSPF_SUMMARY_LSA) p.prefixlen = ip_masklen (sl->mask); else p.prefixlen = IPV4_MAX_BITLEN; apply_mask_ipv4 (&p); if (sl->header.type == OSPF_SUMMARY_LSA && (range = ospf_area_range_match_any (ospf, &p)) && ospf_area_range_active (range)) return 0; /* XXX: This check seems dubious to me. If an ABR has already decided * to consider summaries received in this area, then why would one wish * to exclude default? */ if (IS_OSPF_ABR(ospf) && ospf->abr_type != OSPF_ABR_STAND && area->external_routing != OSPF_AREA_DEFAULT && p.prefix.s_addr == OSPF_DEFAULT_DESTINATION && p.prefixlen == 0) return 0; /* Ignore summary default from a stub area */ abr.family = AF_INET; abr.prefix = sl->header.adv_router; abr.prefixlen = IPV4_MAX_BITLEN; apply_mask_ipv4 (&abr); abr_or = ospf_find_abr_route (rtrs, &abr, area); if (abr_or == NULL) return 0; new_or = ospf_route_new (); new_or->type = OSPF_DESTINATION_NETWORK; new_or->id = sl->header.id; new_or->mask = sl->mask; new_or->u.std.options = sl->header.options; new_or->u.std.origin = (struct lsa_header *) sl; new_or->cost = abr_or->cost + metric; new_or->u.std.area_id = area->area_id; new_or->u.std.external_routing = area->external_routing; new_or->path_type = OSPF_PATH_INTER_AREA; if (sl->header.type == OSPF_SUMMARY_LSA) ospf_ia_network_route (ospf, rt, &p, new_or, abr_or); else { new_or->type = OSPF_DESTINATION_ROUTER; new_or->u.std.flags = ROUTER_LSA_EXTERNAL; ospf_ia_router_route (ospf, rtrs, &p, new_or, abr_or); } return 0; }
int process_summary_lsa (struct ospf_lsa *l, void *v, int i) { struct ospf_area_range *range; struct ospf_route *abr_or, *new_or; struct summary_lsa *sl; struct prefix_ipv4 p, abr; u_int32_t metric; struct ia_args *args; if (l == NULL) return 0; args = (struct ia_args *) v; sl = (struct summary_lsa *) l->data; if (IS_DEBUG_OSPF_EVENT) zlog_info ("process_summary_lsa(): LS ID: %s", inet_ntoa (sl->header.id)); metric = GET_METRIC (sl->metric); if (metric == OSPF_LS_INFINITY) return 0; if (IS_LSA_MAXAGE (l)) return 0; if (ospf_lsa_is_self_originated (l)) return 0; p.family = AF_INET; p.prefix = sl->header.id; if (sl->header.type == OSPF_SUMMARY_LSA) p.prefixlen = ip_masklen (sl->mask); else p.prefixlen = IPV4_MAX_BITLEN; apply_mask_ipv4 (&p); if (sl->header.type == OSPF_SUMMARY_LSA && (range = ospf_area_range_match_any (ospf_top, &p)) && ospf_area_range_active (range)) return 0; if (ospf_top->abr_type != OSPF_ABR_STAND && args->area->external_routing != OSPF_AREA_DEFAULT && p.prefix.s_addr == OSPF_DEFAULT_DESTINATION && p.prefixlen == 0) return 0; /* Ignore summary default from a stub area */ abr.family = AF_INET; abr.prefix = sl->header.adv_router; abr.prefixlen = IPV4_MAX_BITLEN; apply_mask_ipv4 (&abr); abr_or = ospf_find_abr_route (args->rtrs, &abr, args->area); if (abr_or == NULL) return 0; new_or = ospf_route_new (); new_or->type = OSPF_DESTINATION_NETWORK; new_or->id = sl->header.id; new_or->mask = sl->mask; new_or->u.std.options = sl->header.options; new_or->u.std.origin = (struct lsa_header *) sl; new_or->cost = abr_or->cost + metric; new_or->u.std.area_id = args->area->area_id; #ifdef HAVE_NSSA new_or->u.std.external_routing = args->area->external_routing; #endif /* HAVE_NSSA */ new_or->path_type = OSPF_PATH_INTER_AREA; if (sl->header.type == OSPF_SUMMARY_LSA) ospf_ia_network_route (args->rt, &p, new_or, abr_or); else { new_or->type = OSPF_DESTINATION_ROUTER; new_or->u.std.flags = ROUTER_LSA_EXTERNAL; ospf_ia_router_route (args->rtrs, &p, new_or, abr_or); } return 0; }