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 " &> /dev/null"); 75 decap_sanity__destroy(skel); 76 } 77