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// 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 SYS(fmt, ...) \
({ \
char cmd[1024]; \
snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__); \
if (!ASSERT_OK(system(cmd), cmd)) \
goto fail; \
})
#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("ip netns add %s", NS_TEST);
SYS("ip -net %s -6 addr add %s/128 dev lo nodad", NS_TEST, IPV6_IFACE_ADDR);
SYS("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);
}
system("ip netns del " NS_TEST " >& /dev/null");
decap_sanity__destroy(skel);
}
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