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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) Meta Platforms, Inc. and affiliates. */
#define _GNU_SOURCE
#include <sched.h>
#include <linux/socket.h>
#include <net/if.h>
#include "test_progs.h"
#include "cgroup_helpers.h"
#include "network_helpers.h"
#include "setget_sockopt.skel.h"
#define CG_NAME "/setget-sockopt-test"
static const char addr4_str[] = "127.0.0.1";
static const char addr6_str[] = "::1";
static struct setget_sockopt *skel;
static int cg_fd;
static int create_netns(void)
{
if (!ASSERT_OK(unshare(CLONE_NEWNET), "create netns"))
return -1;
if (!ASSERT_OK(system("ip link set dev lo up"), "set lo up"))
return -1;
if (!ASSERT_OK(system("ip link add dev binddevtest1 type veth peer name binddevtest2"),
"add veth"))
return -1;
if (!ASSERT_OK(system("ip link set dev binddevtest1 up"),
"bring veth up"))
return -1;
return 0;
}
static void test_tcp(int family)
{
struct setget_sockopt__bss *bss = skel->bss;
int sfd, cfd;
memset(bss, 0, sizeof(*bss));
sfd = start_server(family, SOCK_STREAM,
family == AF_INET6 ? addr6_str : addr4_str, 0, 0);
if (!ASSERT_GE(sfd, 0, "start_server"))
return;
cfd = connect_to_fd(sfd, 0);
if (!ASSERT_GE(cfd, 0, "connect_to_fd_server")) {
close(sfd);
return;
}
close(sfd);
close(cfd);
ASSERT_EQ(bss->nr_listen, 1, "nr_listen");
ASSERT_EQ(bss->nr_connect, 1, "nr_connect");
ASSERT_EQ(bss->nr_active, 1, "nr_active");
ASSERT_EQ(bss->nr_passive, 1, "nr_passive");
ASSERT_EQ(bss->nr_socket_post_create, 2, "nr_socket_post_create");
ASSERT_EQ(bss->nr_binddev, 2, "nr_bind");
}
static void test_udp(int family)
{
struct setget_sockopt__bss *bss = skel->bss;
int sfd;
memset(bss, 0, sizeof(*bss));
sfd = start_server(family, SOCK_DGRAM,
family == AF_INET6 ? addr6_str : addr4_str, 0, 0);
if (!ASSERT_GE(sfd, 0, "start_server"))
return;
close(sfd);
ASSERT_GE(bss->nr_socket_post_create, 1, "nr_socket_post_create");
ASSERT_EQ(bss->nr_binddev, 1, "nr_bind");
}
void test_setget_sockopt(void)
{
cg_fd = test__join_cgroup(CG_NAME);
if (cg_fd < 0)
return;
if (create_netns())
goto done;
skel = setget_sockopt__open();
if (!ASSERT_OK_PTR(skel, "open skel"))
goto done;
strcpy(skel->rodata->veth, "binddevtest1");
skel->rodata->veth_ifindex = if_nametoindex("binddevtest1");
if (!ASSERT_GT(skel->rodata->veth_ifindex, 0, "if_nametoindex"))
goto done;
if (!ASSERT_OK(setget_sockopt__load(skel), "load skel"))
goto done;
skel->links.skops_sockopt =
bpf_program__attach_cgroup(skel->progs.skops_sockopt, cg_fd);
if (!ASSERT_OK_PTR(skel->links.skops_sockopt, "attach cgroup"))
goto done;
skel->links.socket_post_create =
bpf_program__attach_cgroup(skel->progs.socket_post_create, cg_fd);
if (!ASSERT_OK_PTR(skel->links.socket_post_create, "attach_cgroup"))
goto done;
test_tcp(AF_INET6);
test_tcp(AF_INET);
test_udp(AF_INET6);
test_udp(AF_INET);
done:
setget_sockopt__destroy(skel);
close(cg_fd);
}
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