diff options
Diffstat (limited to 'ospf6d/ospf6_nssa.c')
| -rw-r--r-- | ospf6d/ospf6_nssa.c | 96 |
1 files changed, 90 insertions, 6 deletions
diff --git a/ospf6d/ospf6_nssa.c b/ospf6d/ospf6_nssa.c index abaa16f411..2339d339f7 100644 --- a/ospf6d/ospf6_nssa.c +++ b/ospf6d/ospf6_nssa.c @@ -368,6 +368,11 @@ static void ospf6_abr_task(struct ospf6 *ospf6) if (IS_OSPF6_DEBUG_ABR) zlog_debug("%s : announce stub defaults", __func__); ospf6_abr_defaults_to_stub(ospf6); + + if (IS_OSPF6_DEBUG_ABR) + zlog_debug("%s : announce NSSA Type-7 defaults", + __func__); + ospf6_abr_nssa_type_7_defaults(ospf6); } if (IS_OSPF6_DEBUG_ABR) @@ -872,6 +877,83 @@ static void ospf6_abr_remove_unapproved_translates(struct ospf6 *ospf6) zlog_debug("ospf_abr_remove_unapproved_translates(): Stop"); } +static void ospf6_abr_nssa_type_7_default_create(struct ospf6 *ospf6, + struct ospf6_area *oa) +{ + struct ospf6_route *def; + int metric; + int metric_type; + + if (IS_OSPF6_DEBUG_NSSA) + zlog_debug("Announcing Type-7 default route into NSSA area %s", + oa->name); + + def = ospf6_route_create(ospf6); + def->type = OSPF6_DEST_TYPE_NETWORK; + def->prefix.family = AF_INET6; + def->prefix.prefixlen = 0; + memset(&def->prefix.u.prefix6, 0, sizeof(struct in6_addr)); + def->type = OSPF6_DEST_TYPE_NETWORK; + def->path.subtype = OSPF6_PATH_SUBTYPE_DEFAULT_RT; + if (CHECK_FLAG(ospf6->flag, OSPF6_FLAG_ABR)) + def->path.area_id = ospf6->backbone->area_id; + else + def->path.area_id = oa->area_id; + + /* Compute default route type and metric. */ + if (oa->nssa_default_originate.metric_value != -1) + metric = oa->nssa_default_originate.metric_value; + else + metric = DEFAULT_DEFAULT_ALWAYS_METRIC; + if (oa->nssa_default_originate.metric_type != -1) + metric_type = oa->nssa_default_originate.metric_type; + else + metric_type = DEFAULT_METRIC_TYPE; + def->path.metric_type = metric_type; + def->path.cost = metric; + if (metric_type == 1) + def->path.type = OSPF6_PATH_TYPE_EXTERNAL1; + else + def->path.type = OSPF6_PATH_TYPE_EXTERNAL2; + + ospf6_nssa_lsa_originate(def, oa, false); + ospf6_route_delete(def); +} + +static void ospf6_abr_nssa_type_7_default_delete(struct ospf6 *ospf6, + struct ospf6_area *oa) +{ + struct ospf6_lsa *lsa; + + lsa = ospf6_lsdb_lookup(htons(OSPF6_LSTYPE_TYPE_7), 0, + oa->ospf6->router_id, oa->lsdb); + if (lsa && !OSPF6_LSA_IS_MAXAGE(lsa)) { + if (IS_OSPF6_DEBUG_NSSA) + zlog_debug( + "Withdrawing Type-7 default route from area %s", + oa->name); + + ospf6_lsa_purge(lsa); + } +} + +/* NSSA Type-7 default route. */ +void ospf6_abr_nssa_type_7_defaults(struct ospf6 *ospf6) +{ + struct listnode *node; + struct ospf6_area *oa; + + for (ALL_LIST_ELEMENTS_RO(ospf6->area_list, node, oa)) { + if (IS_AREA_NSSA(oa) && oa->nssa_default_originate.enabled + && (IS_OSPF6_ABR(ospf6) + || (IS_OSPF6_ASBR(ospf6) + && ospf6->nssa_default_import_check.status))) + ospf6_abr_nssa_type_7_default_create(ospf6, oa); + else + ospf6_abr_nssa_type_7_default_delete(ospf6, oa); + } +} + static void ospf6_abr_nssa_task(struct ospf6 *ospf6) { /* called only if any_nssa */ @@ -1173,7 +1255,7 @@ static void ospf6_check_and_originate_type7_lsa(struct ospf6_area *area) /* This means the Type-5 LSA was originated for this route */ if (route->path.origin.id != 0 && info->type != DEFAULT_ROUTE) - ospf6_nssa_lsa_originate(route, area); + ospf6_nssa_lsa_originate(route, area, true); } /* Loop through the aggregation table to originate type-7 LSAs @@ -1193,7 +1275,7 @@ static void ospf6_check_and_originate_type7_lsa(struct ospf6_area *area) "Originating Type-7 LSAs for area %s", area->name); - ospf6_nssa_lsa_originate(aggr->route, area); + ospf6_nssa_lsa_originate(aggr->route, area, true); } } @@ -1287,7 +1369,7 @@ static struct in6_addr *ospf6_get_nssa_fwd_addr(struct ospf6_area *oa) } void ospf6_nssa_lsa_originate(struct ospf6_route *route, - struct ospf6_area *area) + struct ospf6_area *area, bool p_bit) { char buffer[OSPF6_MAX_LSASIZE]; struct ospf6_lsa_header *lsa_header; @@ -1318,7 +1400,7 @@ void ospf6_nssa_lsa_originate(struct ospf6_route *route, UNSET_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_E); /* external route tag */ - if (info->tag) + if (info && info->tag) SET_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_T); else UNSET_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_T); @@ -1333,7 +1415,8 @@ void ospf6_nssa_lsa_originate(struct ospf6_route *route, as_external_lsa->prefix.prefix_options = route->prefix_options; /* Set the P bit */ - as_external_lsa->prefix.prefix_options |= OSPF6_PREFIX_OPTION_P; + if (p_bit) + as_external_lsa->prefix.prefix_options |= OSPF6_PREFIX_OPTION_P; /* don't use refer LS-type */ as_external_lsa->prefix.prefix_refer_lstype = htons(0); @@ -1354,7 +1437,8 @@ void ospf6_nssa_lsa_originate(struct ospf6_route *route, UNSET_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_F); /* External Route Tag */ - if (CHECK_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_T)) { + if (info + && CHECK_FLAG(as_external_lsa->bits_metric, OSPF6_ASBR_BIT_T)) { route_tag_t network_order = htonl(info->tag); memcpy(p, &network_order, sizeof(network_order)); |