vdpa_sim_net: should not drop the multicast/broadcast packet

In the receive_filter(), should not drop the packet with the
broadcast/multicast address. Add the check for this

Signed-off-by: Cindy Lu <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Acked-by: Jason Wang <[email protected]>

Author: lulu-github-name

drivers/vdpa/vdpa_sim/vdpa_sim_net.c

@@ -62,6 +62,9 @@ static bool receive_filter(struct vdpasim *vdpasim, size_t len)
 	if (len < ETH_ALEN + hdr_len)
 		return false;
 
+	if (is_broadcast_ether_addr(vdpasim->buffer + hdr_len) ||
+	    is_multicast_ether_addr(vdpasim->buffer + hdr_len))
+		return true;
 	if (!strncmp(vdpasim->buffer + hdr_len, vio_config->mac, ETH_ALEN))
 		return true;