21 lines
437 B
C
21 lines
437 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include "vmlinux.h"
|
|
#include <bpf/bpf_helpers.h>
|
|
#include "bpf_misc.h"
|
|
|
|
SEC("tc/ingress")
|
|
__description("uninit/mtu: write rejected")
|
|
__success
|
|
__caps_unpriv(CAP_BPF|CAP_NET_ADMIN)
|
|
__failure_unpriv __msg_unpriv("invalid indirect read from stack")
|
|
int tc_uninit_mtu(struct __sk_buff *ctx)
|
|
{
|
|
__u32 mtu;
|
|
|
|
bpf_check_mtu(ctx, 0, &mtu, 0, 0);
|
|
return TCX_PASS;
|
|
}
|
|
|
|
char LICENSE[] SEC("license") = "GPL";
|