1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
 3
 4#include <sys/types.h>
 5#include <sys/socket.h>
 6#include <net/if.h>
 7
 8#include "test_progs.h"
 9#include "network_helpers.h"
10#include "decap_sanity.skel.h"
11
12#define NS_TEST "decap_sanity_ns"
13#define IPV6_IFACE_ADDR "face::1"
14#define UDP_TEST_PORT 7777
15
16void test_decap_sanity(void)
17{
18	LIBBPF_OPTS(bpf_tc_hook, qdisc_hook, .attach_point = BPF_TC_EGRESS);
19	LIBBPF_OPTS(bpf_tc_opts, tc_attach);
20	struct nstoken *nstoken = NULL;
21	struct decap_sanity *skel;
22	struct sockaddr_in6 addr;
23	socklen_t addrlen;
24	char buf[128] = {};
25	int sockfd, err;
26
27	skel = decap_sanity__open_and_load();
28	if (!ASSERT_OK_PTR(skel, "skel open_and_load"))
29		return;
30
31	SYS(fail, "ip netns add %s", NS_TEST);
32	SYS(fail, "ip -net %s -6 addr add %s/128 dev lo nodad", NS_TEST, IPV6_IFACE_ADDR);
33	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
34
35	nstoken = open_netns(NS_TEST);
36	if (!ASSERT_OK_PTR(nstoken, "open_netns"))
37		goto fail;
38
39	qdisc_hook.ifindex = if_nametoindex("lo");
40	if (!ASSERT_GT(qdisc_hook.ifindex, 0, "if_nametoindex lo"))
41		goto fail;
42
43	err = bpf_tc_hook_create(&qdisc_hook);
44	if (!ASSERT_OK(err, "create qdisc hook"))
45		goto fail;
46
47	tc_attach.prog_fd = bpf_program__fd(skel->progs.decap_sanity);
48	err = bpf_tc_attach(&qdisc_hook, &tc_attach);
49	if (!ASSERT_OK(err, "attach filter"))
50		goto fail;
51
52	addrlen = sizeof(addr);
53	err = make_sockaddr(AF_INET6, IPV6_IFACE_ADDR, UDP_TEST_PORT,
54			    (void *)&addr, &addrlen);
55	if (!ASSERT_OK(err, "make_sockaddr"))
56		goto fail;
57	sockfd = socket(AF_INET6, SOCK_DGRAM, 0);
58	if (!ASSERT_NEQ(sockfd, -1, "socket"))
59		goto fail;
60	err = sendto(sockfd, buf, sizeof(buf), 0, (void *)&addr, addrlen);
61	close(sockfd);
62	if (!ASSERT_EQ(err, sizeof(buf), "send"))
63		goto fail;
64
65	ASSERT_TRUE(skel->bss->init_csum_partial, "init_csum_partial");
66	ASSERT_TRUE(skel->bss->final_csum_none, "final_csum_none");
67	ASSERT_FALSE(skel->bss->broken_csum_start, "broken_csum_start");
68
69fail:
70	if (nstoken) {
71		bpf_tc_hook_destroy(&qdisc_hook);
72		close_netns(nstoken);
73	}
74	SYS_NOFAIL("ip netns del " NS_TEST);
75	decap_sanity__destroy(skel);
76}