netdev - [PATCH iproute2 2/2] vxlan: group address requires net device

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Date:   Mon,  5 Sep 2016 11:35:28 +0200
From:   Jiri Benc <jbenc@...hat.com>
To:     netdev@...r.kernel.org
Cc:     Stephen Hemminger <stephen@...workplumber.org>
Subject: [PATCH iproute2 2/2] vxlan: group address requires net device

This is now enforced in the kernel, check also in iproute to get a better
error message.

Signed-off-by: Jiri Benc <jbenc@...hat.com>
---
 ip/iplink_vxlan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
index 251d3f1cfb0b..93af979a1e97 100644
--- a/ip/iplink_vxlan.c
+++ b/ip/iplink_vxlan.c
@@ -266,6 +266,11 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 		return -1;
 	}
 
+	if ((gaddr || !IN6_IS_ADDR_UNSPECIFIED(&gaddr6)) && !link) {
+		fprintf(stderr, "vxlan: 'group' requires 'dev' to be specified\n");
+		return -1;
+	}
+
 	if (!dst_port_set && gpe) {
 		dstport = 4790;
 	} else if (!dst_port_set) {
-- 
1.8.3.1