hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;
hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;