BPF_MW_L4PROTO
BPF_STMT(BPF_LD+BPF_MEM, BPF_MW_L4PROTO),
M[BPF_MW_L4PROTO] = npc->npc_proto;
M[BPF_MW_L4PROTO] = npc->npc_proto;
((1U << BPF_MW_IPVER) | (1U << BPF_MW_L4OFF) | (1U << BPF_MW_L4PROTO))
BPF_STMT(BPF_LD+BPF_W+BPF_MEM, BPF_MW_L4PROTO),
BPF_STMT(BPF_LD+BPF_W+BPF_MEM, BPF_MW_L4PROTO),
CHECK_TRUE(npf_bpfcop_run(BPF_MW_L4PROTO) == IPPROTO_TCP);