ospf6d: Datastructure modification for GR helper functionality.

Description:
	Adding GR helper specific datastructures.

Signed-off-by: Rajesh Girada <rgirada@vmware.com>

3 files changed, 89 insertions, 1 deletions

diff --git a/ospf6d/ospf6_lsa.h b/ospf6d/ospf6_lsa.h
index 4c95ee69bd..a8ed9132dd 100644
--- a/ospf6d/ospf6_lsa.h
+++ b/ospf6d/ospf6_lsa.h
@@ -70,7 +70,8 @@
 #define OSPF6_LSTYPE_TYPE_7           0x2007
 #define OSPF6_LSTYPE_LINK             0x0008
 #define OSPF6_LSTYPE_INTRA_PREFIX     0x2009
-#define OSPF6_LSTYPE_SIZE             0x000a
+#define OSPF6_LSTYPE_GRACE_LSA	      0x000b
+#define OSPF6_LSTYPE_SIZE             0x000c
 
 /* Masks for LS Type : RFC 2740 A.4.2.1 "LS type" */
 #define OSPF6_LSTYPE_UBIT_MASK        0x8000
@@ -146,6 +147,9 @@ struct ospf6_lsa {
 
 	/* lsa instance */
 	struct ospf6_lsa_header *header;
+
+	/*For topo chg detection in HELPER role*/
+	bool tobe_acknowledged;
 };
 
 #define OSPF6_LSA_HEADERONLY 0x01
@@ -210,6 +214,14 @@ extern vector ospf6_lsa_handler_vector;
 		continue;                                                      \
 	}
 
+#define CHECK_LSA_TOPO_CHG_ELIGIBLE(type)		\
+	((type == OSPF6_LSTYPE_ROUTER)			\
+	 || (type == OSPF6_LSTYPE_NETWORK)		\
+	 || (type == OSPF6_LSTYPE_INTER_PREFIX)		\
+	 || (type == OSPF6_LSTYPE_INTER_ROUTER)		\
+	 || (type == OSPF6_LSTYPE_AS_EXTERNAL)		\
+	 || (type == OSPF6_LSTYPE_TYPE_7)		\
+	 || (type == OSPF6_LSTYPE_INTRA_PREFIX))
 
 /* Function Prototypes */
 extern const char *ospf6_lstype_name(uint16_t type);
diff --git a/ospf6d/ospf6_neighbor.h b/ospf6d/ospf6_neighbor.h
index 729b1d2e85..a229897226 100644
--- a/ospf6d/ospf6_neighbor.h
+++ b/ospf6d/ospf6_neighbor.h
@@ -32,6 +32,38 @@ extern unsigned char conf_debug_ospf6_neighbor;
 #define IS_OSPF6_DEBUG_NEIGHBOR(level)                                         \
 	(conf_debug_ospf6_neighbor & OSPF6_DEBUG_NEIGHBOR_##level)
 
+struct ospf6_helper_info {
+
+	/* Grace interval received from
+	 * Restarting Router.
+	 */
+	uint32_t recvd_grace_period;
+
+	/* Grace interval used for grace
+	 * gracetimer.
+	 */
+	uint32_t actual_grace_period;
+
+	/* Grace timer,This Router acts as
+	 * helper until this timer until
+	 * this timer expires.
+	 */
+	struct thread *t_grace_timer;
+
+	/* Helper status */
+	uint32_t gr_helper_status;
+
+	/* Helper exit reason*/
+	uint32_t helper_exit_reason;
+
+	/* Planned/Unplanned restart*/
+	uint32_t gr_restart_reason;
+
+
+	/* Helper rejected reason */
+	uint32_t rejected_reason;
+};
+
 /* Neighbor structure */
 struct ospf6_neighbor {
 	/* Neighbor Router ID String */
@@ -104,6 +136,9 @@ struct ospf6_neighbor {
 
 	/* BFD information */
 	struct bfd_session_params *bfd_session;
+
+	/* ospf6 graceful restart HELPER info */
+	struct ospf6_helper_info gr_helper_info;
 };
 
 /* Neighbor state */
diff --git a/ospf6d/ospf6_top.h b/ospf6d/ospf6_top.h
index fe02cd3f84..58ecf08495 100644
--- a/ospf6d/ospf6_top.h
+++ b/ospf6d/ospf6_top.h
@@ -60,6 +60,43 @@ struct ospf6_redist {
 #define ROUTEMAP(R) (R->route_map.map)
 };
 
+struct ospf6_gr_helper {
+	/* Gracefull restart Helper supported configs*/
+	/* Supported grace interval*/
+	uint32_t supported_grace_time;
+
+	/* Helper support
+	 * Supported : True
+	 * Not Supported : False.
+	 */
+	bool is_helper_supported;
+
+	/* Support for strict LSA check.
+	 * if it is set,Helper aborted
+	 * upon a TOPO change.
+	 */
+	bool strict_lsa_check;
+
+	/* Support as HELPER only for
+	 * planned restarts.
+	 */
+	bool only_planned_restart;
+
+	/* This list contains the advertisement
+	 * routerids for which Helper support is
+	 * enabled.
+	 */
+	struct hash *enable_rtr_list;
+
+	/* HELPER for number of active
+	 * RESTARTERs.
+	 */
+	int active_restarter_cnt;
+
+	/* last HELPER exit reason */
+	uint32_t last_exit_reason;
+};
+
 /* OSPFv3 top level data structure */
 struct ospf6 {
 	/* The relevant vrf_id */
@@ -154,6 +191,10 @@ struct ospf6 {
 	 * to support ECMP.
 	 */
 	uint16_t max_multipath;
+
+	/*ospf6 Graceful restart helper info */
+	struct ospf6_gr_helper ospf6_helper_cfg;
+
 	/* Count of NSSA areas */
 	uint8_t anyNSSA;
 	struct thread *t_abr_task; /* ABR task timer. */