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#include <linux/in6.h>
8
9#include "test_progs.h"
10#include "network_helpers.h"
11#include "decap_sanity.skel.h"
12
13#define NS_TEST "decap_sanity_ns"
14#define IPV6_IFACE_ADDR "face::1"
15#define UDP_TEST_PORT 7777
16
17void test_decap_sanity(void)
18{
19	LIBBPF_OPTS(bpf_tc_hook, qdisc_hook, .attach_point = BPF_TC_EGRESS);
20	LIBBPF_OPTS(bpf_tc_opts, tc_attach);
21	struct nstoken *nstoken = NULL;
22	struct decap_sanity *skel;
23	struct sockaddr_in6 addr;
24	socklen_t addrlen;
25	char buf[128] = {};
26	int sockfd, err;
27
28	skel = decap_sanity__open_and_load();
29	if (!ASSERT_OK_PTR(skel, "skel open_and_load"))
30		return;
31
32	SYS(fail, "ip netns add %s", NS_TEST);
33	SYS(fail, "ip -net %s -6 addr add %s/128 dev lo nodad", NS_TEST, IPV6_IFACE_ADDR);
34	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
35
36	nstoken = open_netns(NS_TEST);
37	if (!ASSERT_OK_PTR(nstoken, "open_netns"))
38		goto fail;
39
40	qdisc_hook.ifindex = if_nametoindex("lo");
41	if (!ASSERT_GT(qdisc_hook.ifindex, 0, "if_nametoindex lo"))
42		goto fail;
43
44	err = bpf_tc_hook_create(&qdisc_hook);
45	if (!ASSERT_OK(err, "create qdisc hook"))
46		goto fail;
47
48	tc_attach.prog_fd = bpf_program__fd(skel->progs.decap_sanity);
49	err = bpf_tc_attach(&qdisc_hook, &tc_attach);
50	if (!ASSERT_OK(err, "attach filter"))
51		goto fail;
52
53	addrlen = sizeof(addr);
54	err = make_sockaddr(AF_INET6, IPV6_IFACE_ADDR, UDP_TEST_PORT,
55			    (void *)&addr, &addrlen);
56	if (!ASSERT_OK(err, "make_sockaddr"))
57		goto fail;
58	sockfd = socket(AF_INET6, SOCK_DGRAM, 0);
59	if (!ASSERT_NEQ(sockfd, -1, "socket"))
60		goto fail;
61	err = sendto(sockfd, buf, sizeof(buf), 0, (void *)&addr, addrlen);
62	close(sockfd);
63	if (!ASSERT_EQ(err, sizeof(buf), "send"))
64		goto fail;
65
66	ASSERT_TRUE(skel->bss->init_csum_partial, "init_csum_partial");
67	ASSERT_TRUE(skel->bss->final_csum_none, "final_csum_none");
68	ASSERT_FALSE(skel->bss->broken_csum_start, "broken_csum_start");
69
70fail:
71	if (nstoken) {
72		bpf_tc_hook_destroy(&qdisc_hook);
73		close_netns(nstoken);
74	}
75	SYS_NOFAIL("ip netns del " NS_TEST);
76	decap_sanity__destroy(skel);
77}
78