void
ospf_abr_nssa_task (struct ospf *ospf) /* called only if any_nssa */
{
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("Check for NSSA-ABR Tasks():");
if (! IS_OSPF_ABR (ospf))
return;
if (! ospf->anyNSSA)
return;
/* Each area must confirm TranslatorRole */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): Start");
/* For all Global Entries flagged "local-translate", unset APPROVED */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): unapprove translates");
ospf_abr_unapprove_translates (ospf);
/* RESET all Ranges in every Area, same as summaries */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): NSSA initialize aggregates");
/* ospf_abr_prepare_aggregates (); TURNED OFF just for now */
/* For all NSSAs, Type-7s, translate to 5's, INSTALL/FLOOD, or
Aggregate as Type-7 */
/* Install or Approve in Type-5 Global LSDB */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): process translates");
ospf_abr_process_nssa_translates (ospf);
/* Translate/Send any "ranged" aggregates, and also 5-Install and
Approve */
/* Scan Type-7's for aggregates, translate to Type-5's,
Install/Flood/Approve */
if (IS_DEBUG_OSPF_NSSA)
zlog_info("ospf_abr_nssa_task(): send NSSA aggregates");
/* ospf_abr_send_nssa_aggregates (); TURNED OFF FOR NOW */
/* Send any NSSA defaults as Type-5 */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): announce nssa defaults");
ospf_abr_announce_nssa_defaults (ospf);
/* Flush any unapproved previous translates from Global Data Base */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): remove unapproved translates");
ospf_abr_remove_unapproved_translates (ospf);
ospf_abr_manage_discard_routes (ospf); /* same as normal...discard */
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_nssa_task(): Stop");
}
/* This is the function taking care about ABR stuff, i.e.
summary-LSA origination and flooding. */
void
ospf_abr_task (struct ospf *ospf)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): Start");
if (ospf->new_table == NULL || ospf->new_rtrs == NULL)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): Routing tables are not yet ready");
return;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): unapprove summaries");
ospf_abr_unapprove_summaries (ospf);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): prepare aggregates");
ospf_abr_prepare_aggregates (ospf);
if (IS_OSPF_ABR (ospf))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): process network RT");
ospf_abr_process_network_rt (ospf, ospf->new_table);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): process router RT");
ospf_abr_process_router_rt (ospf, ospf->new_rtrs);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): announce aggregates");
ospf_abr_announce_aggregates (ospf);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): announce stub defaults");
ospf_abr_announce_stub_defaults (ospf);
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): remove unapproved summaries");
ospf_abr_remove_unapproved_summaries (ospf);
ospf_abr_manage_discard_routes (ospf);
#ifdef HAVE_NSSA
ospf_abr_nssa_task (ospf); /* if nssa-abr, then scan Type-7 LSDB */
#endif /* HAVE_NSSA */
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_task(): Stop");
}
void
ospf_abr_announce_stub_defaults (struct ospf *ospf)
{
listnode node;
struct ospf_area *area;
struct prefix_ipv4 p;
if (! IS_OSPF_ABR (ospf))
return;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_stub_defaults(): Start");
p.family = AF_INET;
p.prefix.s_addr = OSPF_DEFAULT_DESTINATION;
p.prefixlen = 0;
for (node = listhead (ospf->areas); node; nextnode (node))
{
area = getdata (node);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_stub_defaults(): looking at area %s",
inet_ntoa (area->area_id));
#ifdef HAVE_NSSA
if (area->external_routing != OSPF_AREA_STUB)
#else /* ! HAVE_NSSA */
if (area->external_routing == OSPF_AREA_DEFAULT)
#endif /* HAVE_NSSA */
continue;
if (OSPF_IS_AREA_BACKBONE (area))
continue; /* Sanity Check */
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_stub_defaults(): "
"announcing 0.0.0.0/0 to this area");
ospf_abr_announce_network_to_area (&p, area->default_cost, area);
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_stub_defaults(): Stop");
}
void
ospf_abr_announce_nssa_defaults (struct ospf *ospf) /* By ABR-Translator */
{
listnode node;
struct ospf_area *area;
struct prefix_ipv4 p;
if (! IS_OSPF_ABR (ospf))
return;
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_announce_stub_defaults(): Start");
p.family = AF_INET;
p.prefix.s_addr = OSPF_DEFAULT_DESTINATION;
p.prefixlen = 0;
for (node = listhead (ospf->areas); node; nextnode (node))
{
area = getdata (node);
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_announce_nssa_defaults(): looking at area %s",
inet_ntoa (area->area_id));
if (area->external_routing != OSPF_AREA_NSSA)
continue;
if (OSPF_IS_AREA_BACKBONE (area))
continue; /* Sanity Check */
/* if (!TranslatorRole continue V 1.0 look for "always" conf */
if (area->NSSATranslator)
{
if (IS_DEBUG_OSPF_NSSA)
zlog_info ("ospf_abr_announce_nssa_defaults(): "
"announcing 0.0.0.0/0 to this nssa");
/* ospf_abr_announce_nssa_asbr_to_as (&p, area->default_cost, area); */
}
}
}
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;
}
