From 2f47fa5db2ce0fbe118ed9b6727c3956a48c85fb Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 14 Oct 2011 03:35:52 +0200
Subject: [PATCH] fix adding routes

---
 system-linux.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/system-linux.c b/system-linux.c
index e04fa23..cf4e9c7 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -393,6 +393,7 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd)
 {
 	int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
 	bool have_gw;
+	unsigned int flags = 0;
 
 	if (alen == 4)
 		have_gw = !!route->nexthop.in.s_addr;
@@ -414,7 +415,10 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd)
 		.rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
 	};
 
-	struct nl_msg *msg = nlmsg_alloc_simple(cmd, 0);
+	if (cmd == RTM_NEWROUTE)
+		flags |= NLM_F_CREATE | NLM_F_REPLACE;
+
+	struct nl_msg *msg = nlmsg_alloc_simple(cmd, flags);
 	if (!msg)
 		return -1;
 
-- 
2.11.0