// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019 Facebook #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_compiler.h" char _license[] SEC("license") = "GPL"; SEC("socket") int combinations(volatile struct __sk_buff* skb) { int ret = 0, i; __pragma_loop_no_unroll for (i = 0; i < 20; i++) if (skb->len) ret |= 1 << i; return ret; }