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// SPDX-License-Identifier: GPL-2.0
#include <error.h>
#include <test_progs.h>
#include <linux/pkt_cls.h>
#include "test_tc_change_tail.skel.h"
#include "socket_helpers.h"
#define LO_IFINDEX 1
void test_tc_change_tail(void)
{
LIBBPF_OPTS(bpf_tcx_opts, tcx_opts);
struct test_tc_change_tail *skel = NULL;
struct bpf_link *link;
int c1, p1;
char buf[2];
int ret;
skel = test_tc_change_tail__open_and_load();
if (!ASSERT_OK_PTR(skel, "test_tc_change_tail__open_and_load"))
return;
link = bpf_program__attach_tcx(skel->progs.change_tail, LO_IFINDEX,
&tcx_opts);
if (!ASSERT_OK_PTR(link, "bpf_program__attach_tcx"))
goto destroy;
skel->links.change_tail = link;
ret = create_pair(AF_INET, SOCK_DGRAM, &c1, &p1);
if (!ASSERT_OK(ret, "create_pair"))
goto destroy;
ret = xsend(p1, "Tr", 2, 0);
ASSERT_EQ(ret, 2, "xsend(p1)");
ret = recv(c1, buf, 2, 0);
ASSERT_EQ(ret, 2, "recv(c1)");
ASSERT_EQ(skel->data->change_tail_ret, 0, "change_tail_ret");
ret = xsend(p1, "G", 1, 0);
ASSERT_EQ(ret, 1, "xsend(p1)");
ret = recv(c1, buf, 2, 0);
ASSERT_EQ(ret, 1, "recv(c1)");
ASSERT_EQ(skel->data->change_tail_ret, 0, "change_tail_ret");
ret = xsend(p1, "E", 1, 0);
ASSERT_EQ(ret, 1, "xsend(p1)");
ret = recv(c1, buf, 1, 0);
ASSERT_EQ(ret, 1, "recv(c1)");
ASSERT_EQ(skel->data->change_tail_ret, -EINVAL, "change_tail_ret");
ret = xsend(p1, "Z", 1, 0);
ASSERT_EQ(ret, 1, "xsend(p1)");
ret = recv(c1, buf, 1, 0);
ASSERT_EQ(ret, 1, "recv(c1)");
ASSERT_EQ(skel->data->change_tail_ret, -EINVAL, "change_tail_ret");
close(c1);
close(p1);
destroy:
test_tc_change_tail__destroy(skel);
}
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