Merge pull request #8935 from rgirada/ospfv3_gr_helper

ospf6d: Support for ospfv3  graceful restart  helper functionality

1 files changed, 61 insertions, 0 deletions

diff --git a/ospf6d/ospf6_flood.c b/ospf6d/ospf6_flood.c
index 5a4dd72b6..f13ed3e3b 100644
--- a/ospf6d/ospf6_flood.c
+++ b/ospf6d/ospf6_flood.c
@@ -41,6 +41,7 @@
 
 #include "ospf6_flood.h"
 #include "ospf6_nssa.h"
+#include "ospf6_gr.h"
 
 unsigned char conf_debug_ospf6_flooding;
 
@@ -323,6 +324,22 @@ void ospf6_install_lsa(struct ospf6_lsa *lsa)
 
 	/* actually install */
 	lsa->installed = now;
+
+	/* Topo change handling */
+	if (CHECK_LSA_TOPO_CHG_ELIGIBLE(ntohs(lsa->header->type))) {
+
+		/* check if it is new lsa ? or existing lsa got modified ?*/
+		if (!old || OSPF6_LSA_IS_CHANGED(old, lsa)) {
+			struct ospf6 *ospf6;
+
+			ospf6 = ospf6_get_by_lsdb(lsa);
+
+			assert(ospf6);
+
+			ospf6_helper_handle_topo_chg(ospf6, lsa);
+		}
+	}
+
 	ospf6_lsdb_add(lsa, lsa->lsdb);
 
 	if (ntohs(lsa->header->type) == OSPF6_LSTYPE_TYPE_7) {
@@ -1016,6 +1033,50 @@ void ospf6_receive_lsa(struct ospf6_neighbor *from,
 		    != from->ospf6_if->area->ospf6->router_id)
 			ospf6_flood(from, new);
 
+		/* Received Grace-LSA */
+		if (IS_GRACE_LSA(new)) {
+			struct ospf6 *ospf6;
+
+			ospf6 = ospf6_get_by_lsdb(new);
+
+			assert(ospf6);
+
+			if (OSPF6_LSA_IS_MAXAGE(new)) {
+
+				if (IS_DEBUG_OSPF6_GR)
+					zlog_debug(
+						"%s, Received a maxage GraceLSA from router %pI4",
+						__func__,
+						&new->header->adv_router);
+				if (old) {
+					ospf6_process_maxage_grace_lsa(
+						ospf6, new, from);
+				} else {
+					if (IS_DEBUG_OSPF6_GR)
+						zlog_debug(
+							"%s, GraceLSA doesn't exist in lsdb, so discarding GraceLSA",
+							__func__);
+					return;
+				}
+			} else {
+
+				if (IS_DEBUG_OSPF6_GR)
+					zlog_debug(
+						"%s, Received a GraceLSA from router %pI4",
+						__func__,
+						&new->header->adv_router);
+
+				if (ospf6_process_grace_lsa(ospf6, new, from)
+				    == OSPF6_GR_NOT_HELPER) {
+					if (IS_DEBUG_OSPF6_GR)
+						zlog_debug(
+							"%s, Not moving to HELPER role, So dicarding GraceLSA",
+							__func__);
+					return;
+				}
+			}
+		}
+
 		/* (d), installing lsdb, which may cause routing
 			table calculation (replacing database copy) */
 		ospf6_install_lsa(new);