netdev - [PATCH net-next] vxlan: Only set has-GBP bit in header if any other bits would be set

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Message-Id: <776a985ae0db9e2c24aefe6d7d6cef1794eb685a.1423065534.git.tgraf@suug.ch>
Date:	Wed,  4 Feb 2015 17:00:04 +0100
From:	Thomas Graf <tgraf@...g.ch>
To:	davem@...emlof.net
Cc:	netdev@...r.kernel.org
Subject: [PATCH net-next] vxlan: Only set has-GBP bit in header if any other bits would be set

This allows for a VXLAN-GBP socket to talk to a Linux VXLAN socket by
not setting any of the bits.

Signed-off-by: Thomas Graf <tgraf@...g.ch>
---
 drivers/net/vxlan.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 31bac2a..fd68dc2 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1681,6 +1681,9 @@ static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
 {
 	struct vxlanhdr_gbp *gbp;
 
+	if (!md->gbp)
+		return;
+
 	gbp = (struct vxlanhdr_gbp *)vxh;
 	vxh->vx_flags |= htonl(VXLAN_HF_GBP);
 
-- 
1.9.3

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