netdev - [PATCH iproute2] ip route: get: only set RTM_F_LOOKUP

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Date:   Sat, 12 Jan 2019 12:54:06 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     stephen@...workplumber.org, dsahern@...il.com
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH iproute2] ip route: get: only set RTM_F_LOOKUP_TABLE flag for IPv4

Kernel ignores the RTM_F_LOOKUP_TABLE flag for all families
but IPv4.  Don't set it, otherwise it may fall foul of
strict checking policies.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 ip/iproute.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ip/iproute.c b/ip/iproute.c
index 0440366ee26a..5f58a3b34406 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -2068,7 +2068,9 @@ static int iproute_get(int argc, char **argv)
 	if (req.r.rtm_family == AF_UNSPEC)
 		req.r.rtm_family = AF_INET;
 
-	req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
+	/* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
+	if (req.r.rtm_family == AF_INET)
+		req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
 	if (fib_match)
 		req.r.rtm_flags |= RTM_F_FIB_MATCH;
 
-- 
2.19.2