root/tools/testing/selftests/bpf/prog_tests/skb_helpers.c
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <network_helpers.h>

void test_skb_helpers(void)
{
        struct __sk_buff skb = {
                .wire_len = 100,
                .gso_segs = 8,
                .gso_size = 10,
        };
        LIBBPF_OPTS(bpf_test_run_opts, topts,
                .data_in = &pkt_v4,
                .data_size_in = sizeof(pkt_v4),
                .ctx_in = &skb,
                .ctx_size_in = sizeof(skb),
                .ctx_out = &skb,
                .ctx_size_out = sizeof(skb),
        );
        struct bpf_object *obj;
        int err, prog_fd;

        err = bpf_prog_test_load("./test_skb_helpers.bpf.o",
                                 BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
        if (!ASSERT_OK(err, "load"))
                return;
        err = bpf_prog_test_run_opts(prog_fd, &topts);
        ASSERT_OK(err, "test_run");
        bpf_object__close(obj);
}