// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ #include <sys/types.h> #include <sys/socket.h> #include <net/if.h> #include <linux/in6.h> #include "test_progs.h" #include "network_helpers.h" #include "decap_sanity.skel.h" #define NS_TEST "decap_sanity_ns" #define IPV6_IFACE_ADDR "face::1" #define UDP_TEST_PORT 7777 void test_decap_sanity(void) { LIBBPF_OPTS(bpf_tc_hook, qdisc_hook, .attach_point = BPF_TC_EGRESS); LIBBPF_OPTS(bpf_tc_opts, tc_attach); struct nstoken *nstoken = NULL; struct decap_sanity *skel; struct sockaddr_in6 addr; socklen_t addrlen; char buf[128] = {}; int sockfd, err; skel = decap_sanity__open_and_load(); if (!ASSERT_OK_PTR(skel, "skel open_and_load")) return; SYS(fail, "ip netns add %s", NS_TEST); SYS(fail, "ip -net %s -6 addr add %s/128 dev lo nodad", NS_TEST, IPV6_IFACE_ADDR); SYS(fail, "ip -net %s link set dev lo up", NS_TEST); nstoken = open_netns(NS_TEST); if (!ASSERT_OK_PTR(nstoken, "open_netns")) goto fail; qdisc_hook.ifindex = if_nametoindex("lo"); if (!ASSERT_GT(qdisc_hook.ifindex, 0, "if_nametoindex lo")) goto fail; err = bpf_tc_hook_create(&qdisc_hook); if (!ASSERT_OK(err, "create qdisc hook")) goto fail; tc_attach.prog_fd = bpf_program__fd(skel->progs.decap_sanity); err = bpf_tc_attach(&qdisc_hook, &tc_attach); if (!ASSERT_OK(err, "attach filter")) goto fail; addrlen = sizeof(addr); err = make_sockaddr(AF_INET6, IPV6_IFACE_ADDR, UDP_TEST_PORT, (void *)&addr, &addrlen); if (!ASSERT_OK(err, "make_sockaddr")) goto fail; sockfd = socket(AF_INET6, SOCK_DGRAM, 0); if (!ASSERT_NEQ(sockfd, -1, "socket")) goto fail; err = sendto(sockfd, buf, sizeof(buf), 0, (void *)&addr, addrlen); close(sockfd); if (!ASSERT_EQ(err, sizeof(buf), "send")) goto fail; ASSERT_TRUE(skel->bss->init_csum_partial, "init_csum_partial"); ASSERT_TRUE(skel->bss->final_csum_none, "final_csum_none"); ASSERT_FALSE(skel->bss->broken_csum_start, "broken_csum_start"); fail: if (nstoken) { bpf_tc_hook_destroy(&qdisc_hook); close_netns(nstoken); } SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null"); decap_sanity__destroy(skel); }