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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}