tools/testing/selftests/bpf/prog_tests/decap_sanity.c

   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 }