void
ospf_abr_announce_network (struct ospf *ospf,
struct route_node *n, struct ospf_route *or)
{
struct ospf_area_range *range;
struct ospf_area *area, *or_area;
struct prefix_ipv4 *p;
listnode node;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): Start");
p = (struct prefix_ipv4 *) &n->p;
or_area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id);
assert (or_area);
for (node = listhead (ospf->areas); node; nextnode (node))
{
area = getdata (node);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): looking at area %s",
inet_ntoa (area->area_id));
if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id))
continue;
if (ospf_abr_nexthops_belong_to_area (or, area))
continue;
if (!ospf_abr_should_accept (&n->p, area))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"prefix %s/%d was denied by import-list",
inet_ntoa (p->prefix), p->prefixlen);
continue;
}
if (!ospf_abr_plist_in_check (area, or, &n->p))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"prefix %s/%d was denied by prefix-list",
inet_ntoa (p->prefix), p->prefixlen);
continue;
}
if (area->external_routing != OSPF_AREA_DEFAULT && area->no_summary)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"area %s is stub and no_summary",
inet_ntoa (area->area_id));
continue;
}
if (or->path_type == OSPF_PATH_INTER_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): this is "
"inter-area route to %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
if (!OSPF_IS_AREA_BACKBONE (area))
ospf_abr_announce_network_to_area (p, or->cost, area);
}
if (or->path_type == OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"this is intra-area route to %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
if ((range = ospf_area_range_match (or_area, p)) &&
!ospf_area_is_transit (area))
ospf_abr_update_aggregate (range, or);
else
ospf_abr_announce_network_to_area (p, or->cost, area);
}
}
}
void
ospf_ia_routing (struct ospf *ospf,
struct route_table *rt,
struct route_table *rtrs)
{
struct ospf_area * area;
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing():start");
if (IS_OSPF_ABR (ospf))
{
struct listnode *node;
struct ospf_area *area;
switch (ospf->abr_type)
{
case OSPF_ABR_STAND:
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing():Standard ABR");
if ((area = ospf->backbone))
{
struct listnode *node;
if (IS_DEBUG_OSPF_EVENT)
{
zlog_debug ("ospf_ia_routing():backbone area found");
zlog_debug ("ospf_ia_routing():examining summaries");
}
OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area))
if (area != ospf->backbone)
if (ospf_area_is_transit (area))
OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
}
else
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing():backbone area NOT found");
break;
case OSPF_ABR_IBM:
case OSPF_ABR_CISCO:
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing():Alternative Cisco/IBM ABR");
area = ospf->backbone; /* Find the BB */
/* If we have an active BB connection */
if (area && ospf_act_bb_connection (ospf))
{
if (IS_DEBUG_OSPF_EVENT)
{
zlog_debug ("ospf_ia_routing(): backbone area found");
zlog_debug ("ospf_ia_routing(): examining BB summaries");
}
OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area))
if (area != ospf->backbone)
if (ospf_area_is_transit (area))
OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
}
else
{ /* No active BB connection--consider all areas */
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing(): "
"Active BB connection not found");
for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area))
OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
}
break;
case OSPF_ABR_SHORTCUT:
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_routing():Alternative Shortcut");
area = ospf->backbone; /* Find the BB */
/* If we have an active BB connection */
if (area && ospf_act_bb_connection (ospf))
{
if (IS_DEBUG_OSPF_EVENT)
{
zlog_debug ("ospf_ia_routing(): backbone area found");
zlog_debug ("ospf_ia_routing(): examining BB summaries");
}
OSPF_EXAMINE_SUMMARIES_ALL (area, rt, rtrs);
}
for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area))
if (area != ospf->backbone)
if (ospf_area_is_transit (area) ||
((area->shortcut_configured != OSPF_SHORTCUT_DISABLE) &&
((ospf->backbone == NULL) ||
((area->shortcut_configured == OSPF_SHORTCUT_ENABLE) &&
area->shortcut_capability))))
OSPF_EXAMINE_TRANSIT_SUMMARIES_ALL (area, rt, rtrs);
break;
default:
break;
}
void
ospf_abr_announce_aggregates (struct ospf *ospf)
{
struct ospf_area *area, *ar;
struct ospf_area_range *range;
struct route_node *rn;
struct prefix_ipv4 p;
listnode node, n;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates(): Start");
for (node = listhead (ospf->areas); node; nextnode (node))
{
area = getdata (node);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates(): looking at area %s",
inet_ntoa (area->area_id));
for (rn = route_top (area->ranges); rn; rn = route_next (rn))
if ((range = rn->info))
{
if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates():"
" discarding suppress-ranges");
continue;
}
p.family = AF_INET;
p.prefix = range->addr;
p.prefixlen = range->masklen;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates():"
" this is range: %s/%d",
inet_ntoa (p.prefix), p.prefixlen);
if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
{
p.family = AF_INET;
p.prefix = range->subst_addr;
p.prefixlen = range->subst_masklen;
}
if (range->specifics)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates(): active range");
for (n = listhead (ospf->areas); n; nextnode (n))
{
ar = getdata (n);
if (ar == area)
continue;
/* We do not check nexthops here, because
intra-area routes can be associated with
one area only */
/* backbone routes are not summarized
when announced into transit areas */
if (ospf_area_is_transit (ar) &&
OSPF_IS_AREA_BACKBONE (area))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates(): Skipping "
"announcement of BB aggregate into"
" a transit area");
continue;
}
ospf_abr_announce_network_to_area (&p, range->cost, ar);
}
}
}
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_aggregates(): Stop");
}
