// SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.h> #include <bpf/bpf_helpers.h> int _version SEC("version") = 1; char _license[] SEC("license") = "GPL"; SEC("skb_ctx") int process(struct __sk_buff *skb) { #pragma clang loop unroll(full) for (int i = 0; i < 5; i++) { if (skb->cb[i] != i + 1) return 1; skb->cb[i]++; } skb->priority++; skb->tstamp++; skb->mark++; if (skb->wire_len != 100) return 1; if (skb->gso_segs != 8) return 1; return 0; }