1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/bpf.h> 4 #include <bpf/bpf_helpers.h> 5 6 #include "bpf_compiler.h" 7 8 char _license[] SEC("license") = "GPL"; 9 10 SEC("tc") 11 int process(struct __sk_buff *skb) 12 { 13 __pragma_loop_unroll_full 14 for (int i = 0; i < 5; i++) { 15 if (skb->cb[i] != i + 1) 16 return 1; 17 skb->cb[i]++; 18 } 19 skb->priority++; 20 skb->tstamp++; 21 skb->mark++; 22 23 if (skb->wire_len != 100) 24 return 1; 25 if (skb->gso_segs != 8) 26 return 1; 27 if (skb->gso_size != 10) 28 return 1; 29 if (skb->ingress_ifindex != 11) 30 return 1; 31 if (skb->ifindex != 1) 32 return 1; 33 if (skb->hwtstamp != 11) 34 return 1; 35 36 return 0; 37 } 38