From: Karen Schoener <karen@voltanet.io>
Date: Wed, 24 Mar 2021 16:49:59 +0000 (-0400)
Subject: ospf6d: Do not flood unknown LSAs if U-bit is clear
X-Git-Tag: base_8.0~223^2
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=0889da248b248a8e6912683f4dd3e4c9b1ccfba3;p=mirror%2Ffrr.git

ospf6d: Do not flood unknown LSAs if U-bit is clear

Do not flood unknown LSAs if U-bit is clear.

Signed-off-by: Karen Schoener <karen@voltanet.io>
---

diff --git a/ospf6d/ospf6_flood.c b/ospf6d/ospf6_flood.c
index 2d896546fa..5f4815fec1 100644
--- a/ospf6d/ospf6_flood.c
+++ b/ospf6d/ospf6_flood.c
@@ -463,6 +463,19 @@ static void ospf6_flood_process(struct ospf6_neighbor *from,
 	struct ospf6_area *oa;
 
 	for (ALL_LIST_ELEMENTS(process->area_list, node, nnode, oa)) {
+
+		/* If unknown LSA and U-bit clear, treat as link local
+		 * flooding scope
+		 */
+		if (!OSPF6_LSA_IS_KNOWN(lsa->header->type)
+		    && !(ntohs(lsa->header->type) & OSPF6_LSTYPE_UBIT_MASK)
+		    && (oa != OSPF6_INTERFACE(lsa->lsdb->data)->area)) {
+
+			if (IS_OSPF6_DEBUG_FLOODING)
+				zlog_debug("Unknown LSA, do not flood");
+			continue;
+		}
+
 		if (OSPF6_LSA_SCOPE(lsa->header->type) == OSPF6_SCOPE_AREA
 		    && oa != OSPF6_AREA(lsa->lsdb->data))
 			continue;