virtio: reset vnet header on tx

Change-Id: Ib04a8787038fb536470a04d99fdc165102edfb5a
Signed-off-by: Damjan Marion <damarion@cisco.com>

diff --git a/src/vnet/devices/virtio/device.c b/src/vnet/devices/virtio/device.c
index 5528ddb..ae8a116 100644 (file)
--- a/src/vnet/devices/virtio/device.c
+++ b/src/vnet/devices/virtio/device.c
@@ -130,6 +130,9 @@ add_buffer_to_slot (vlib_main_t * vm, virtio_vring_t * vring, u32 bi,
   struct vring_desc *d;
   d = &vring->desc[next];
   vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+  struct virtio_net_hdr_v1 *hdr = vlib_buffer_get_current (b) - hdr_sz;
+
+  memset (hdr, 0, hdr_sz);
 
   if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
     {