From 4a07e739a37160d4f33d97b29b936b2f8c8e611a Mon Sep 17 00:00:00 2001
From: Colin McInnes <colin.mcinnes@vecima.com>
Date: Thu, 9 Jan 2025 11:59:29 -0600
Subject: [PATCH] Only send non-zero route lifetime to NETLINK

---
 src/if-linux.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/if-linux.c b/src/if-linux.c
index e8d2c85b..4dad05da 100644
--- a/src/if-linux.c
+++ b/src/if-linux.c
@@ -753,9 +753,14 @@ if_copyrt(struct dhcpcd_ctx *ctx, struct rt *rt, struct nlmsghdr *nlm)
 			break;
 		}
 		case RTA_EXPIRES:
-			rt->rt_expires = *(uint32_t *)RTA_DATA(rta);
+		{
+			if (rt->rt_expires != 0)
+			{
+				rt->rt_expires = *(uint32_t *)RTA_DATA(rta);
+			}
 			break;
 		}
+		}
 
 		if (sa != NULL) {
 			socklen_t salen;