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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/***
Copyright © 2014 Intel Corporation. All rights reserved.
***/
#include <netinet/icmp6.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "sd-ndisc.h"
#include "alloc-util.h"
#include "fd-util.h"
#include "hexdecoct.h"
#include "icmp6-util.h"
#include "socket-util.h"
#include "strv.h"
#include "ndisc-internal.h"
#include "tests.h"
static struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
};
static bool verbose = false;
static int test_fd[2];
static sd_ndisc *test_timeout_nd;
typedef int (*send_ra_t)(uint8_t flags);
static send_ra_t send_ra_function;
static void router_dump(sd_ndisc_router *rt) {
struct in6_addr addr;
uint8_t hop_limit;
uint64_t t, flags;
uint32_t mtu;
uint16_t lifetime;
unsigned preference;
int r;
assert_se(rt);
log_info("--");
assert_se(sd_ndisc_router_get_address(rt, &addr) >= 0);
log_info("Sender: %s", IN6_ADDR_TO_STRING(&addr));
assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_REALTIME, &t) >= 0);
log_info("Timestamp: %s", FORMAT_TIMESTAMP(t));
assert_se(sd_ndisc_router_get_timestamp(rt, CLOCK_MONOTONIC, &t) >= 0);
log_info("Monotonic: %" PRIu64, t);
if (sd_ndisc_router_get_hop_limit(rt, &hop_limit) < 0)
log_info("No hop limit set");
else
log_info("Hop limit: %u", hop_limit);
assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
log_info("Flags: <%s|%s>",
flags & ND_RA_FLAG_OTHER ? "OTHER" : "",
flags & ND_RA_FLAG_MANAGED ? "MANAGED" : "");
assert_se(sd_ndisc_router_get_preference(rt, &preference) >= 0);
log_info("Preference: %s",
preference == SD_NDISC_PREFERENCE_LOW ? "low" :
preference == SD_NDISC_PREFERENCE_HIGH ? "high" : "medium");
assert_se(sd_ndisc_router_get_lifetime(rt, &lifetime) >= 0);
log_info("Lifetime: %" PRIu16, lifetime);
if (sd_ndisc_router_get_mtu(rt, &mtu) < 0)
log_info("No MTU set");
else
log_info("MTU: %" PRIu32, mtu);
r = sd_ndisc_router_option_rewind(rt);
for (;;) {
uint8_t type;
assert_se(r >= 0);
if (r == 0)
break;
assert_se(sd_ndisc_router_option_get_type(rt, &type) >= 0);
log_info(">> Option %u", type);
switch (type) {
case SD_NDISC_OPTION_SOURCE_LL_ADDRESS:
case SD_NDISC_OPTION_TARGET_LL_ADDRESS: {
_cleanup_free_ char *c = NULL;
const void *p;
size_t n;
assert_se(sd_ndisc_router_option_get_raw(rt, &p, &n) >= 0);
assert_se(n > 2);
assert_se(c = hexmem((uint8_t*) p + 2, n - 2));
log_info("Address: %s", c);
break;
}
case SD_NDISC_OPTION_PREFIX_INFORMATION: {
uint32_t lifetime_valid, lifetime_preferred;
unsigned prefix_len;
uint8_t pfl;
struct in6_addr a;
assert_se(sd_ndisc_router_prefix_get_valid_lifetime(rt, &lifetime_valid) >= 0);
log_info("Valid Lifetime: %" PRIu32, lifetime_valid);
assert_se(sd_ndisc_router_prefix_get_preferred_lifetime(rt, &lifetime_preferred) >= 0);
log_info("Preferred Lifetime: %" PRIu32, lifetime_preferred);
assert_se(sd_ndisc_router_prefix_get_flags(rt, &pfl) >= 0);
log_info("Flags: <%s|%s>",
pfl & ND_OPT_PI_FLAG_ONLINK ? "ONLINK" : "",
pfl & ND_OPT_PI_FLAG_AUTO ? "AUTO" : "");
assert_se(sd_ndisc_router_prefix_get_prefixlen(rt, &prefix_len) >= 0);
log_info("Prefix Length: %u", prefix_len);
assert_se(sd_ndisc_router_prefix_get_address(rt, &a) >= 0);
log_info("Prefix: %s", IN6_ADDR_TO_STRING(&a));
break;
}
case SD_NDISC_OPTION_RDNSS: {
const struct in6_addr *a;
uint32_t lt;
int n, i;
n = sd_ndisc_router_rdnss_get_addresses(rt, &a);
assert_se(n > 0);
for (i = 0; i < n; i++)
log_info("DNS: %s", IN6_ADDR_TO_STRING(a + i));
assert_se(sd_ndisc_router_rdnss_get_lifetime(rt, <) >= 0);
log_info("Lifetime: %" PRIu32, lt);
break;
}
case SD_NDISC_OPTION_DNSSL: {
_cleanup_strv_free_ char **l = NULL;
uint32_t lt;
int n, i;
n = sd_ndisc_router_dnssl_get_domains(rt, &l);
assert_se(n > 0);
for (i = 0; i < n; i++)
log_info("Domain: %s", l[i]);
assert_se(sd_ndisc_router_dnssl_get_lifetime(rt, <) >= 0);
log_info("Lifetime: %" PRIu32, lt);
break;
}}
r = sd_ndisc_router_option_next(rt);
}
}
int icmp6_bind_router_solicitation(int ifindex) {
assert_se(ifindex == 42);
if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
int icmp6_bind_router_advertisement(int ifindex) {
return -ENOSYS;
}
static struct in6_addr dummy_link_local = {
.s6_addr = {
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x12, 0x34, 0x56, 0xff, 0xfe, 0x78, 0x9a, 0xbc,
},
};
int icmp6_receive(
int fd,
void *iov_base,
size_t iov_len,
struct in6_addr *ret_sender,
triple_timestamp *ret_timestamp) {
assert_se(read (fd, iov_base, iov_len) == (ssize_t)iov_len);
if (ret_timestamp)
triple_timestamp_get(ret_timestamp);
if (ret_sender)
*ret_sender = dummy_link_local;
return 0;
}
static int send_ra(uint8_t flags) {
uint8_t advertisement[] = {
0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
};
advertisement[5] = flags;
assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
sizeof(advertisement));
if (verbose)
printf(" sent RA with flag 0x%02x\n", flags);
return 0;
}
int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
if (!send_ra_function)
return 0;
return send_ra_function(0);
}
static void test_callback(sd_ndisc *nd, sd_ndisc_event_t event, sd_ndisc_router *rt, void *userdata) {
sd_event *e = userdata;
static unsigned idx = 0;
uint64_t flags_array[] = {
0,
0,
0,
ND_RA_FLAG_OTHER,
ND_RA_FLAG_MANAGED
};
uint64_t flags;
assert_se(nd);
if (event != SD_NDISC_EVENT_ROUTER)
return;
router_dump(rt);
assert_se(sd_ndisc_router_get_flags(rt, &flags) >= 0);
assert_se(flags == flags_array[idx]);
idx++;
if (verbose)
printf(" got event 0x%02" PRIx64 "\n", flags);
if (idx < ELEMENTSOF(flags_array)) {
send_ra(flags_array[idx]);
return;
}
sd_event_exit(e, 0);
}
TEST(rs) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
send_ra_function = send_ra;
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_ndisc_new(&nd) >= 0);
assert_se(nd);
assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_ndisc_set_callback(nd, test_callback, e) >= 0);
assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
30 * USEC_PER_SEC, 0,
NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
assert_se(sd_ndisc_stop(nd) >= 0);
assert_se(sd_ndisc_start(nd) >= 0);
assert_se(sd_ndisc_start(nd) >= 0);
assert_se(sd_ndisc_stop(nd) >= 0);
test_fd[1] = safe_close(test_fd[1]);
assert_se(sd_ndisc_start(nd) >= 0);
assert_se(sd_event_loop(e) >= 0);
test_fd[1] = safe_close(test_fd[1]);
}
static int test_timeout_value(uint8_t flags) {
static int count = 0;
static usec_t last = 0;
sd_ndisc *nd = test_timeout_nd;
usec_t min, max;
assert_se(nd);
assert_se(nd->event);
if (++count >= 20)
sd_event_exit(nd->event, 0);
if (last == 0) {
/* initial RT = IRT + RAND*IRT */
min = NDISC_ROUTER_SOLICITATION_INTERVAL -
NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
max = NDISC_ROUTER_SOLICITATION_INTERVAL +
NDISC_ROUTER_SOLICITATION_INTERVAL / 10;
} else {
/* next RT = 2*RTprev + RAND*RTprev */
min = 2 * last - last / 10;
max = 2 * last + last / 10;
}
/* final RT > MRT */
if (last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL) {
min = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL -
NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
max = NDISC_MAX_ROUTER_SOLICITATION_INTERVAL +
NDISC_MAX_ROUTER_SOLICITATION_INTERVAL / 10;
}
log_info("backoff timeout interval %2d %s%s <= %s <= %s",
count,
last * 2 > NDISC_MAX_ROUTER_SOLICITATION_INTERVAL ? "(max) ": "",
FORMAT_TIMESPAN(min, USEC_PER_MSEC),
FORMAT_TIMESPAN(nd->retransmit_time, USEC_PER_MSEC),
FORMAT_TIMESPAN(max, USEC_PER_MSEC));
assert_se(min <= nd->retransmit_time);
assert_se(max >= nd->retransmit_time);
last = nd->retransmit_time;
assert_se(sd_event_source_set_time(nd->timeout_event_source, 0) >= 0);
return 0;
}
TEST(timeout) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_(sd_ndisc_unrefp) sd_ndisc *nd = NULL;
send_ra_function = test_timeout_value;
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_ndisc_new(&nd) >= 0);
assert_se(nd);
test_timeout_nd = nd;
assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
assert_se(sd_ndisc_set_ifindex(nd, 42) >= 0);
assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
30 * USEC_PER_SEC, 0,
NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
assert_se(sd_ndisc_start(nd) >= 0);
assert_se(sd_event_loop(e) >= 0);
test_fd[1] = safe_close(test_fd[1]);
}
DEFINE_TEST_MAIN(LOG_DEBUG);
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