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

void test_pkt_access(void)
{
        const char *file = "./test_pkt_access.bpf.o";
        struct bpf_object *obj;
        int err, prog_fd;
        LIBBPF_OPTS(bpf_test_run_opts, topts,
                .data_in = &pkt_v4,
                .data_size_in = sizeof(pkt_v4),
                .repeat = 100000,
        );

        err = bpf_prog_test_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
        if (CHECK_FAIL(err))
                return;

        err = bpf_prog_test_run_opts(prog_fd, &topts);
        ASSERT_OK(err, "ipv4 test_run_opts err");
        ASSERT_OK(topts.retval, "ipv4 test_run_opts retval");

        topts.data_in = &pkt_v6;
        topts.data_size_in = sizeof(pkt_v6);
        topts.data_size_out = 0; /* reset from last call */
        err = bpf_prog_test_run_opts(prog_fd, &topts);
        ASSERT_OK(err, "ipv6 test_run_opts err");
        ASSERT_OK(topts.retval, "ipv6 test_run_opts retval");

        bpf_object__close(obj);
}