ospf6d: spf calculation w/ multiple router lsas

An OSPFv3 enabled Router can originate or receive
multiple Link State-IDs for Router LSAs.
As per RFC 5340 A 4.3, more than one Router LSAs,
from given Vertex is considered (as concatenated)
single large Router LSA.

Created hidden show command to simulate concatenated
large LSA from advertising/self Router LSAs.

Ticket:CM-19329
Reviewed By:
Testing Done:
Simulate 160 subinterfaces between R1 === R2--R3,
This triggers R1 and R2 to generate multiple link state
IDs for Router LSAs. During SPF calculation only aggregated
single router LSA processed and SPF tree formed.

Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>

ospf6d/ospf6_area.c

@@ -221,6 +221,7 @@ struct ospf6_area *ospf6_area_create(u_int32_t area_id, struct ospf6 *o, int df)
 	oa->lsdb->hook_add = ospf6_area_lsdb_hook_add;
 	oa->lsdb->hook_remove = ospf6_area_lsdb_hook_remove;
 	oa->lsdb_self = ospf6_lsdb_create(oa);
+	oa->temp_router_lsa_lsdb = ospf6_lsdb_create(oa);
 
 	oa->spf_table = OSPF6_ROUTE_TABLE_CREATE(AREA, SPF_RESULTS);
 	oa->spf_table->scope = oa;
@@ -279,6 +280,7 @@ void ospf6_area_delete(struct ospf6_area *oa)
 
 	ospf6_lsdb_delete(oa->lsdb);
 	ospf6_lsdb_delete(oa->lsdb_self);
+	ospf6_lsdb_delete(oa->temp_router_lsa_lsdb);
 
 	ospf6_spf_table_finish(oa->spf_table);
 	ospf6_route_table_delete(oa->spf_table);

ospf6d/ospf6_area.h

@@ -55,6 +55,7 @@ struct ospf6_area {
 
 	struct ospf6_lsdb *lsdb;
 	struct ospf6_lsdb *lsdb_self;
+	struct ospf6_lsdb *temp_router_lsa_lsdb;
 
 	struct ospf6_route_table *spf_table;
 	struct ospf6_route_table *route_table;

ospf6d/ospf6_lsa.c

@@ -191,7 +191,7 @@ int ospf6_lsa_is_changed(struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2)
 
 /* ospf6 age functions */
 /* calculate birth */
-static void ospf6_lsa_age_set(struct ospf6_lsa *lsa)
+void ospf6_lsa_age_set(struct ospf6_lsa *lsa)
 {
 	struct timeval now;
 

ospf6d/ospf6_lsa.h

@@ -252,5 +252,6 @@ extern void ospf6_lsa_terminate(void);
 
 extern int config_write_ospf6_debug_lsa(struct vty *vty);
 extern void install_element_ospf6_debug_lsa(void);
+extern void ospf6_lsa_age_set(struct ospf6_lsa *lsa);
 
 #endif /* OSPF6_LSA_H */