void
ospf_abr_process_network_rt (struct ospf *ospf,
struct route_table *rt)
{
struct ospf_area *area;
struct ospf_route *or;
struct route_node *rn;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): Start");
for (rn = route_top (rt); rn; rn = route_next (rn))
{
if ((or = rn->info) == NULL)
continue;
if (!(area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id)))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): area %s no longer exists",
inet_ntoa (or->u.std.area_id));
continue;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): this is a route to %s/%d",
inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen);
if (or->path_type >= OSPF_PATH_TYPE1_EXTERNAL)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): "
"this is an External router, skipping");
continue;
}
if (or->cost >= OSPF_LS_INFINITY)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this route's cost is infinity, skipping");
continue;
}
if (or->type == OSPF_DESTINATION_DISCARD)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this is a discard entry, skipping");
continue;
}
if (or->path_type == OSPF_PATH_INTRA_AREA &&
!ospf_abr_should_announce (ospf, &rn->p, or))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): denied by export-list");
continue;
}
if (or->path_type == OSPF_PATH_INTRA_AREA &&
!ospf_abr_plist_out_check (area, or, &rn->p))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): denied by prefix-list");
continue;
}
if ((or->path_type == OSPF_PATH_INTER_AREA) &&
!OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this is route is not backbone one, skipping");
continue;
}
if ((ospf->abr_type == OSPF_ABR_CISCO) ||
(ospf->abr_type == OSPF_ABR_IBM))
if (!ospf_act_bb_connection (ospf) &&
or->path_type != OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): ALT ABR: "
"No BB connection, skip not intra-area routes");
continue;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): announcing");
ospf_abr_announce_network (ospf, rn, or);
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): Stop");
}
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_process_router_rt (struct ospf *ospf, struct route_table *rt)
{
struct ospf_route *or;
struct route_node *rn;
struct list *l;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): Start");
for (rn = route_top (rt); rn; rn = route_next (rn))
{
listnode node;
char flag = 0;
struct ospf_route *best = NULL;
if (rn->info == NULL)
continue;
l = rn->info;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): this is a route to %s",
inet_ntoa (rn->p.u.prefix4));
for (node = listhead (l); node; nextnode (node))
{
or = getdata (node);
if (or == NULL)
continue;
if (!ospf_area_lookup_by_area_id (ospf, or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): area %s no longer exists",
inet_ntoa (or->u.std.area_id));
continue;
}
if (!CHECK_FLAG (or->u.std.flags, ROUTER_LSA_EXTERNAL))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This is not an ASBR, skipping");
continue;
}
if (!flag)
{
best = ospf_find_asbr_route (ospf, rt,
(struct prefix_ipv4 *) &rn->p);
flag = 1;
}
if (best == NULL)
continue;
if (or != best)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route is not the best among possible, skipping");
continue;
}
if (or->path_type == OSPF_PATH_INTER_AREA &&
!OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route is not a backbone one, skipping");
continue;
}
if (or->cost >= OSPF_LS_INFINITY)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route has LS_INFINITY metric, skipping");
continue;
}
if (ospf->abr_type == OSPF_ABR_CISCO
|| ospf->abr_type == OSPF_ABR_IBM)
if (!ospf_act_bb_connection (ospf)
&& or->path_type != OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): ALT ABR: "
"No BB connection, skip not intra-area routes");
continue;
}
ospf_abr_announce_rtr (ospf, (struct prefix_ipv4 *) &rn->p, or);
}
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): Stop");
}
