mbx_add_common_iface_mac
struct mbx_add_common_iface_mac *fwcmd;
fwcmd = (struct mbx_add_common_iface_mac *)&mbx.payload;
sizeof (struct mbx_add_common_iface_mac));
mbx.payload_length = sizeof (struct mbx_add_common_iface_mac);
sizeof (struct mbx_add_common_iface_mac));