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 17 void 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 70 fail: 71 if (nstoken) { 72 bpf_tc_hook_destroy(&qdisc_hook); 73 close_netns(nstoken); 74 } 75 SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null"); 76 decap_sanity__destroy(skel); 77 } 78