From: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
Date: Sat, 10 Jun 2023 07:30:17 +0000 (+0200)
Subject: isisd: Uninstall routes only if installed
X-Git-Tag: base_9.1~88^2~102
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=7064d8a7276e1ec23b568edcf35bd36a27d953d8;p=matthieu%2Ffrr.git

isisd: Uninstall routes only if installed

In some cases, IS-IS may attempt to remove routes that have not been
installed before. We can prevent IS-IS from doing this by aborting
`isis_zebra_route_del_route` when the ISIS_ROUTE_FLAG_ZEBRA_SYNCED flag
is unset, meaning that the route is not installed in the kernel.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
---

diff --git a/isisd/isis_zebra.c b/isisd/isis_zebra.c
index 4813173f45..1706d27a3a 100644
--- a/isisd/isis_zebra.c
+++ b/isisd/isis_zebra.c
@@ -308,6 +308,9 @@ void isis_zebra_route_del_route(struct isis *isis,
 	if (zclient->sock < 0)
 		return;
 
+	if (!CHECK_FLAG(route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNCED))
+		return;
+
 	memset(&api, 0, sizeof(api));
 	api.vrf_id = isis->vrf_id;
 	api.type = PROTO_TYPE;