O_LAYER4_BPF
(*cmd)->opcode = O_LAYER4_BPF;
keyword(MODULE_LAYER4_ID, O_LAYER4_BPF, "bpf", FILTER);
function(MODULE_LAYER4_ID, O_LAYER4_BPF,
ip_fw3_register_filter_funcs(MODULE_LAYER4_ID, O_LAYER4_BPF,