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 SYS(fmt, ...) \ 14 ({ \ 15 char cmd[1024]; \ 16 snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__); \ 17 if (!ASSERT_OK(system(cmd), cmd)) \ 18 goto fail; \ 19 }) 20 21 #define NS_TEST "decap_sanity_ns" 22 #define IPV6_IFACE_ADDR "face::1" 23 #define UDP_TEST_PORT 7777 24 25 void test_decap_sanity(void) 26 { 27 LIBBPF_OPTS(bpf_tc_hook, qdisc_hook, .attach_point = BPF_TC_EGRESS); 28 LIBBPF_OPTS(bpf_tc_opts, tc_attach); 29 struct nstoken *nstoken = NULL; 30 struct decap_sanity *skel; 31 struct sockaddr_in6 addr; 32 socklen_t addrlen; 33 char buf[128] = {}; 34 int sockfd, err; 35 36 skel = decap_sanity__open_and_load(); 37 if (!ASSERT_OK_PTR(skel, "skel open_and_load")) 38 return; 39 40 SYS("ip netns add %s", NS_TEST); 41 SYS("ip -net %s -6 addr add %s/128 dev lo nodad", NS_TEST, IPV6_IFACE_ADDR); 42 SYS("ip -net %s link set dev lo up", NS_TEST); 43 44 nstoken = open_netns(NS_TEST); 45 if (!ASSERT_OK_PTR(nstoken, "open_netns")) 46 goto fail; 47 48 qdisc_hook.ifindex = if_nametoindex("lo"); 49 if (!ASSERT_GT(qdisc_hook.ifindex, 0, "if_nametoindex lo")) 50 goto fail; 51 52 err = bpf_tc_hook_create(&qdisc_hook); 53 if (!ASSERT_OK(err, "create qdisc hook")) 54 goto fail; 55 56 tc_attach.prog_fd = bpf_program__fd(skel->progs.decap_sanity); 57 err = bpf_tc_attach(&qdisc_hook, &tc_attach); 58 if (!ASSERT_OK(err, "attach filter")) 59 goto fail; 60 61 addrlen = sizeof(addr); 62 err = make_sockaddr(AF_INET6, IPV6_IFACE_ADDR, UDP_TEST_PORT, 63 (void *)&addr, &addrlen); 64 if (!ASSERT_OK(err, "make_sockaddr")) 65 goto fail; 66 sockfd = socket(AF_INET6, SOCK_DGRAM, 0); 67 if (!ASSERT_NEQ(sockfd, -1, "socket")) 68 goto fail; 69 err = sendto(sockfd, buf, sizeof(buf), 0, (void *)&addr, addrlen); 70 close(sockfd); 71 if (!ASSERT_EQ(err, sizeof(buf), "send")) 72 goto fail; 73 74 ASSERT_TRUE(skel->bss->init_csum_partial, "init_csum_partial"); 75 ASSERT_TRUE(skel->bss->final_csum_none, "final_csum_none"); 76 ASSERT_FALSE(skel->bss->broken_csum_start, "broken_csum_start"); 77 78 fail: 79 if (nstoken) { 80 bpf_tc_hook_destroy(&qdisc_hook); 81 close_netns(nstoken); 82 } 83 system("ip netns del " NS_TEST " >& /dev/null"); 84 decap_sanity__destroy(skel); 85 } 86