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
16 void 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
69 fail:
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 }
77
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