Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1127 insertions, 0 deletions

diff --git a/src/libsystemd-network/test-dhcp6-client.c b/src/libsystemd-network/test-dhcp6-client.c
new file mode 100644
index 0000000..ae3cdb8
--- /dev/null
+++ b/src/libsystemd-network/test-dhcp6-client.c
@@ -0,0 +1,1127 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+  Copyright © 2014 Intel Corporation. All rights reserved.
+***/
+
+#include <net/ethernet.h>
+#include <net/if_arp.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "sd-dhcp6-client.h"
+#include "sd-event.h"
+
+#include "dhcp-identifier.h"
+#include "dhcp6-internal.h"
+#include "dhcp6-lease-internal.h"
+#include "dhcp6-protocol.h"
+#include "fd-util.h"
+#include "macro.h"
+#include "memory-util.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tests.h"
+#include "time-util.h"
+
+#define DHCP6_CLIENT_EVENT_TEST_ADVERTISED 77
+#define IA_ID_BYTES                                                     \
+        0x0e, 0xcf, 0xa3, 0x7d
+#define IA_NA_ADDRESS1_BYTES                                            \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x78, 0xee, 0x1c, 0xf3, 0x09, 0x3c, 0x55, 0xad
+#define IA_NA_ADDRESS2_BYTES                                            \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x78, 0xee, 0x1c, 0xf3, 0x09, 0x3c, 0x55, 0xae
+#define IA_PD_PREFIX1_BYTES                                             \
+        0x2a, 0x02, 0x81, 0x0d, 0x98, 0x80, 0x37, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+#define IA_PD_PREFIX2_BYTES                                             \
+        0x2a, 0x02, 0x81, 0x0d, 0x98, 0x80, 0x37, 0xc1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+#define DNS1_BYTES                                                      \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
+#define DNS2_BYTES                                                      \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02
+#define SNTP1_BYTES                                                     \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03
+#define SNTP2_BYTES                                                     \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04
+#define NTP1_BYTES                                                      \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05
+#define NTP2_BYTES                                                      \
+        0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06
+#define CLIENT_ID_BYTES                                                 \
+        0x00, 0x02, 0x00, 0x00, 0xab, 0x11, 0x61, 0x77, 0x40, 0xde, 0x13, 0x42, 0xc3, 0xa2
+#define SERVER_ID_BYTES                                                 \
+        0x00, 0x01, 0x00, 0x01, 0x19, 0x40, 0x5c, 0x53, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53
+#define VENDOR_SUBOPTION_BYTES                                         \
+        0x01
+
+static const struct in6_addr local_address =
+        { { { 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, } } };
+static const struct in6_addr mcast_address =
+        IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
+static const struct in6_addr ia_na_address1 = { { { IA_NA_ADDRESS1_BYTES } } };
+static const struct in6_addr ia_na_address2 = { { { IA_NA_ADDRESS2_BYTES } } };
+static const struct in6_addr ia_pd_prefix1 = { { { IA_PD_PREFIX1_BYTES } } };
+static const struct in6_addr ia_pd_prefix2 = { { { IA_PD_PREFIX2_BYTES } } };
+static const struct in6_addr dns1 = { { { DNS1_BYTES } } };
+static const struct in6_addr dns2 = { { { DNS2_BYTES } } };
+static const struct in6_addr sntp1 = { { { SNTP1_BYTES } } };
+static const struct in6_addr sntp2 = { { { SNTP2_BYTES } } };
+static const struct in6_addr ntp1 = { { { NTP1_BYTES } } };
+static const struct in6_addr ntp2 = { { { NTP2_BYTES } } };
+static const uint8_t client_id[] = { CLIENT_ID_BYTES };
+static const uint8_t server_id[] = { SERVER_ID_BYTES };
+static uint8_t vendor_suboption_data[] = { VENDOR_SUBOPTION_BYTES };
+static const struct ether_addr mac = {
+        .ether_addr_octet = { 'A', 'B', 'C', '1', '2', '3' },
+};
+static int test_fd[2] = EBADF_PAIR;
+static sd_dhcp6_option vendor_suboption = {
+        .n_ref = 1,
+        .enterprise_identifier = 32,
+        .option = 247,
+        .data = vendor_suboption_data,
+        .length = 1,
+};
+static int test_ifindex = 42;
+static unsigned test_client_sent_message_count = 0;
+static sd_dhcp6_client *client_ref = NULL;
+
+TEST(client_basic) {
+        _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
+        int v;
+
+        assert_se(sd_dhcp6_client_new(&client) >= 0);
+        assert_se(client);
+
+        assert_se(sd_dhcp6_client_set_ifindex(client, 15) == 0);
+        assert_se(sd_dhcp6_client_set_ifindex(client, 42) >= 0);
+
+        assert_se(sd_dhcp6_client_set_mac(client, mac.ether_addr_octet, sizeof(mac), ARPHRD_ETHER) >= 0);
+
+        assert_se(sd_dhcp6_client_set_fqdn(client, "host") == 1);
+        assert_se(sd_dhcp6_client_set_fqdn(client, "host.domain") == 1);
+        assert_se(sd_dhcp6_client_set_fqdn(client, NULL) == 1);
+        assert_se(sd_dhcp6_client_set_fqdn(client, "~host") == -EINVAL);
+        assert_se(sd_dhcp6_client_set_fqdn(client, "~host.domain") == -EINVAL);
+
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_CLIENTID) == -EINVAL);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DNS_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NTP_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_SNTP_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_VENDOR_OPTS) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DOMAIN) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, 10) == -EINVAL);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NIS_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NISP_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NIS_SERVER) == -EEXIST);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NISP_SERVER) == -EEXIST);
+
+        assert_se(sd_dhcp6_client_set_information_request(client, 1) >= 0);
+        v = 0;
+        assert_se(sd_dhcp6_client_get_information_request(client, &v) >= 0);
+        assert_se(v);
+        assert_se(sd_dhcp6_client_set_information_request(client, 0) >= 0);
+        v = 42;
+        assert_se(sd_dhcp6_client_get_information_request(client, &v) >= 0);
+        assert_se(v == 0);
+
+        v = 0;
+        assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
+        assert_se(v);
+        v = 0;
+        assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
+        assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
+        assert_se(v);
+        v = 42;
+        assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
+        assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
+        assert_se(v);
+
+        assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
+        assert_se(sd_dhcp6_client_set_prefix_delegation(client, 1) >= 0);
+        v = 0;
+        assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
+        assert_se(v);
+        v = 0;
+        assert_se(sd_dhcp6_client_get_prefix_delegation(client, &v) >= 0);
+        assert_se(v);
+
+        assert_se(sd_dhcp6_client_set_callback(client, NULL, NULL) >= 0);
+
+        assert_se(sd_dhcp6_client_detach_event(client) >= 0);
+}
+
+TEST(parse_domain) {
+        _cleanup_free_ char *domain = NULL;
+        _cleanup_strv_free_ char **list = NULL;
+        uint8_t *data;
+
+        data = (uint8_t []) { 7, 'e', 'x', 'a', 'm', 'p', 'l', 'e', 3, 'c', 'o', 'm', 0 };
+        assert_se(dhcp6_option_parse_domainname(data, 13, &domain) >= 0);
+        assert_se(domain);
+        assert_se(streq(domain, "example.com"));
+        domain = mfree(domain);
+
+        data = (uint8_t []) { 4, 't', 'e', 's', 't' };
+        assert_se(dhcp6_option_parse_domainname(data, 5, &domain) >= 0);
+        assert_se(domain);
+        assert_se(streq(domain, "test"));
+        domain = mfree(domain);
+
+        data = (uint8_t []) { 0 };
+        assert_se(dhcp6_option_parse_domainname(data, 1, &domain) < 0);
+
+        data = (uint8_t []) { 7, 'e', 'x', 'a', 'm', 'p', 'l', 'e', 3, 'c', 'o', 'm', 0,
+                              6, 'f', 'o', 'o', 'b', 'a', 'r', 0 };
+        assert_se(dhcp6_option_parse_domainname_list(data, 21, &list) >= 0);
+        assert_se(list);
+        assert_se(streq(list[0], "example.com"));
+        assert_se(streq(list[1], "foobar"));
+        assert_se(!list[2]);
+        list = strv_free(list);
+
+        data = (uint8_t []) { 1, 'a', 0, 20, 'b', 'c' };
+        assert_se(dhcp6_option_parse_domainname_list(data, 6, &list) < 0);
+
+        data = (uint8_t []) { 0 , 0 };
+        assert_se(dhcp6_option_parse_domainname_list(data, 2, &list) < 0);
+}
+
+TEST(option) {
+        static const uint8_t packet[] = {
+                'F', 'O', 'O', 'H', 'O', 'G', 'E',
+                0x00, SD_DHCP6_OPTION_ORO, 0x00, 0x07,
+                'A', 'B', 'C', 'D', 'E', 'F', 'G',
+                0x00, SD_DHCP6_OPTION_VENDOR_CLASS, 0x00, 0x09,
+                '1', '2', '3', '4', '5', '6', '7', '8', '9',
+                'B', 'A', 'R',
+        };
+        static const uint8_t result[] = {
+                'F', 'O', 'O', 'H', 'O', 'G', 'E',
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                'B', 'A', 'R',
+        };
+        _cleanup_free_ uint8_t *buf = NULL;
+        size_t offset, pos, optlen;
+        const uint8_t *optval;
+        uint16_t optcode;
+
+        assert_se(sizeof(packet) == sizeof(result));
+
+        offset = 0;
+        assert_se(dhcp6_option_parse(packet, 0, &offset, &optcode, &optlen, &optval) == -EBADMSG);
+
+        offset = 3;
+        assert_se(dhcp6_option_parse(packet, 0, &offset, &optcode, &optlen, &optval) == -EBADMSG);
+
+        /* Tests for reading unaligned data. */
+        assert_se(buf = new(uint8_t, sizeof(packet)));
+        for (size_t i = 0; i <= 7; i++) {
+                memcpy(buf, packet + i, sizeof(packet) - i);
+                offset = 7 - i;
+                assert_se(dhcp6_option_parse(buf, sizeof(packet), &offset, &optcode, &optlen, &optval) >= 0);
+
+                assert_se(optcode == SD_DHCP6_OPTION_ORO);
+                assert_se(optlen == 7);
+                assert_se(optval == buf + 11 - i);
+        }
+
+        offset = 7;
+        assert_se(dhcp6_option_parse(packet, sizeof(packet), &offset, &optcode, &optlen, &optval) >= 0);
+
+        assert_se(optcode == SD_DHCP6_OPTION_ORO);
+        assert_se(optlen == 7);
+        assert_se(optval == packet + 11);
+
+        free(buf);
+        assert_se(buf = memdup(result, sizeof(result)));
+        pos = 7;
+        assert_se(dhcp6_option_append(&buf, &pos, optcode, optlen, optval) >= 0);
+
+        assert_se(dhcp6_option_parse(packet, sizeof(packet), &offset, &optcode, &optlen, &optval) >= 0);
+
+        assert_se(optcode == SD_DHCP6_OPTION_VENDOR_CLASS);
+        assert_se(optlen == 9);
+        assert_se(optval == packet + 22);
+
+        assert_se(dhcp6_option_append(&buf, &pos, optcode, optlen, optval) >= 0);
+
+        assert_se(memcmp(packet, buf, sizeof(packet)) == 0);
+}
+
+TEST(option_status) {
+        uint8_t option1[] = {
+                /* IA NA */
+                0x00, 0x03, 0x00, 0x12, 0x1a, 0x1d, 0x1a, 0x1d,
+                0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
+                /* status option */
+                0x00, 0x0d, 0x00, 0x02, 0x00, 0x01,
+        };
+        static const uint8_t option2[] = {
+                /* IA NA */
+                0x00, 0x03, 0x00, 0x2e, 0x1a, 0x1d, 0x1a, 0x1d,
+                0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
+                /* IA Addr */
+                0x00, 0x05, 0x00, 0x1e,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+                0x01, 0x02, 0x03, 0x04, 0x0a, 0x0b, 0x0c, 0x0d,
+                /* IA address status option */
+                0x00, 0x0d, 0x00, 0x02, 0x00, 0x01,
+        };
+        static const uint8_t option3[] = {
+                /* IA NA */
+                0x00, 0x03, 0x00, 0x34, 0x1a, 0x1d, 0x1a, 0x1d,
+                0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
+                /* IA Addr */
+                0x00, 0x05, 0x00, 0x24,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+                0x01, 0x02, 0x03, 0x04, 0x0a, 0x0b, 0x0c, 0x0d,
+                /* IA address status option */
+                0x00, 0x0d, 0x00, 0x08, 0x00, 0x00, 'f',  'o',
+                'o',  'b',  'a',  'r',
+        };
+        static const uint8_t option4[] = {
+                /* IA PD */
+                0x00, 0x19, 0x00, 0x2f, 0x1a, 0x1d, 0x1a, 0x1d,
+                0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
+                /* IA PD Prefix */
+                0x00, 0x1a, 0x00, 0x1f,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x80, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe,
+                0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x00,
+                /* PD prefix status option */
+                0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
+        };
+        static const uint8_t option5[] = {
+                /* IA PD */
+                0x00, 0x19, 0x00, 0x52, 0x1a, 0x1d, 0x1a, 0x1d,
+                0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
+                /* IA PD Prefix #1 */
+                0x00, 0x1a, 0x00, 0x1f,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x80, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe,
+                0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x00,
+                /* PD prefix status option */
+                0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
+                /* IA PD Prefix #2 */
+                0x00, 0x1a, 0x00, 0x1f,
+                0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                0x80, 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x0l, 0xd0,
+                0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0x00,
+                /* PD prefix status option */
+                0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
+        };
+        _cleanup_(dhcp6_ia_freep) DHCP6IA *ia = NULL;
+        DHCP6Option *option;
+        be32_t iaid;
+        int r;
+
+        memcpy(&iaid, option1 + 4, sizeof(iaid));
+
+        option = (DHCP6Option*) option1;
+        assert_se(sizeof(option1) == sizeof(DHCP6Option) + be16toh(option->len));
+
+        r = dhcp6_option_parse_ia(NULL, 0, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r == -ENOANO);
+
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r == -EINVAL);
+
+        option->len = htobe16(17);
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r == -EBADMSG);
+
+        option->len = htobe16(sizeof(DHCP6Option));
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r == -EBADMSG);
+
+        option = (DHCP6Option*) option2;
+        assert_se(sizeof(option2) == sizeof(DHCP6Option) + be16toh(option->len));
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r == -ENODATA);
+
+        option = (DHCP6Option*) option3;
+        assert_se(sizeof(option3) == sizeof(DHCP6Option) + be16toh(option->len));
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r >= 0);
+        assert_se(ia);
+        assert_se(ia->addresses);
+        ia = dhcp6_ia_free(ia);
+
+        option = (DHCP6Option*) option4;
+        assert_se(sizeof(option4) == sizeof(DHCP6Option) + be16toh(option->len));
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r >= 0);
+        assert_se(ia);
+        assert_se(ia->addresses);
+        assert_se(memcmp(&ia->header.id, &option4[4], 4) == 0);
+        assert_se(memcmp(&ia->header.lifetime_t1, &option4[8], 4) == 0);
+        assert_se(memcmp(&ia->header.lifetime_t2, &option4[12], 4) == 0);
+        ia = dhcp6_ia_free(ia);
+
+        option = (DHCP6Option*) option5;
+        assert_se(sizeof(option5) == sizeof(DHCP6Option) + be16toh(option->len));
+        r = dhcp6_option_parse_ia(NULL, iaid, be16toh(option->code), be16toh(option->len), option->data, &ia);
+        assert_se(r >= 0);
+        assert_se(ia);
+        assert_se(ia->addresses);
+        ia = dhcp6_ia_free(ia);
+}
+
+TEST(client_parse_message_issue_22099) {
+        static const uint8_t msg[] = {
+                /* Message type */
+                DHCP6_MESSAGE_REPLY,
+                /* Transaction ID */
+                0x7c, 0x4c, 0x16,
+                /* Rapid commit */
+                0x00, SD_DHCP6_OPTION_RAPID_COMMIT, 0x00, 0x00,
+                /* NTP servers */
+                0x00, SD_DHCP6_OPTION_NTP_SERVER, 0x00, 0x14,
+                /* NTP server (broken sub option and sub option length) */
+                0x01, 0x00, 0x10, 0x00,
+                0xfd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xde, 0x15, 0xc8, 0xff, 0xfe, 0xef, 0x1e, 0x4e,
+                /* Client ID */
+                0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+                0x00, 0x02, /* DUID-EN */
+                0x00, 0x00, 0xab, 0x11, /* pen */
+                0x5c, 0x6b, 0x90, 0xec, 0xda, 0x95, 0x15, 0x45, /* id */
+                /* Server ID */
+                0x00, SD_DHCP6_OPTION_SERVERID, 0x00, 0x0a,
+                0x00, 0x03, /* DUID-LL */
+                0x00, 0x01, /* htype */
+                0xdc, 0x15, 0xc8, 0xef, 0x1e, 0x4e, /* haddr */
+                /* preference */
+                0x00, SD_DHCP6_OPTION_PREFERENCE, 0x00, 0x01,
+                0x00,
+                /* DNS servers */
+                0x00, SD_DHCP6_OPTION_DNS_SERVER, 0x00, 0x10,
+                0xfd, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xde, 0x15, 0xc8, 0xff, 0xfe, 0xef, 0x1e, 0x4e,
+                /* v6 pcp server */
+                0x00, SD_DHCP6_OPTION_V6_PCP_SERVER, 0x00, 0x10,
+                0x2a, 0x02, 0x81, 0x0d, 0x98, 0x80, 0x37, 0x00, 0xde, 0x15, 0xc8, 0xff, 0xfe, 0xef, 0x1e, 0x4e,
+                /* IA_NA */
+                0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x28,
+                0xcc, 0x59, 0x11, 0x7b, /* iaid */
+                0x00, 0x00, 0x07, 0x08, /* lifetime T1 */
+                0x00, 0x00, 0x0b, 0x40, /* lifetime T2 */
+                /* IA_NA (iaaddr suboption) */
+                0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+                0x2a, 0x02, 0x81, 0x0d, 0x98, 0x80, 0x37, 0x00, 0x6a, 0x05, 0xca, 0xff, 0xfe, 0xf1, 0x51, 0x53, /* address */
+                0x00, 0x00, 0x0e, 0x10, /* preferred lifetime */
+                0x00, 0x00, 0x1c, 0x20, /* valid lifetime */
+                /* IA_PD */
+                0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x29,
+                0xcc, 0x59, 0x11, 0x7b, /* iaid */
+                0x00, 0x00, 0x07, 0x08, /* lifetime T1 */
+                0x00, 0x00, 0x0b, 0x40, /* lifetime T2 */
+                /* IA_PD (iaprefix suboption) */
+                0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+                0x00, 0x00, 0x0e, 0x10, /* preferred lifetime */
+                0x00, 0x00, 0x1c, 0x20, /* valid lifetime */
+                0x3a, /* prefixlen */
+                0x2a, 0x02, 0x81, 0x0d, 0x98, 0x80, 0x37, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* prefix */
+        };
+        static const uint8_t duid[] = {
+                0x00, 0x00, 0xab, 0x11, 0x5c, 0x6b, 0x90, 0xec, 0xda, 0x95, 0x15, 0x45,
+        };
+        _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
+        _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
+
+        assert_se(sd_dhcp6_client_new(&client) >= 0);
+        assert_se(sd_dhcp6_client_set_iaid(client, 0xcc59117b) >= 0);
+        assert_se(sd_dhcp6_client_set_duid_raw(client, 2, duid, sizeof(duid)) >= 0);
+
+        assert_se(dhcp6_lease_new_from_message(client, (const DHCP6Message*) msg, sizeof(msg), NULL, NULL, &lease) >= 0);
+}
+
+TEST(client_parse_message_issue_24002) {
+        static const uint8_t msg[] = {
+                /* Message Type */
+                0x07,
+                /* Transaction ID */
+                0x0e, 0xa5, 0x7c,
+                /* Client ID */
+                0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+                0x00, 0x02, /* DUID-EN */
+                0x00, 0x00, 0xab, 0x11, /* pen */
+                0x5c, 0x6b, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, /* id */
+                /* Server ID */
+                0x00, 0x02, 0x00, 0x1a,
+                0x00, 0x02, 0x00, 0x00, 0x05, 0x83, 0x30, 0x63, 0x3a, 0x38, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55,
+                0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
+                /* IA_PD */
+                0x00, 0x19, 0x00, 0x29,
+                0xaa, 0xbb, 0xcc, 0xdd, /* iaid */
+                0x00, 0x00, 0x03, 0x84, /* lifetime (T1) */
+                0x00, 0x00, 0x05, 0xa0, /* lifetime (T2) */
+                /* IA_PD (iaprefix suboption) */
+                0x00, 0x1a, 0x00, 0x19,
+                0x00, 0x00, 0x07, 0x08, /* preferred lifetime */
+                0x00, 0x00, 0x38, 0x40, /* valid lifetime */
+                0x38, /* prefixlen */
+                0x20, 0x03, 0x00, 0xff, 0xaa, 0xbb, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* prefix */
+                /* Rapid commit */
+                0x00, 0x0e, 0x00, 0x00,
+                /* Trailing invalid byte at the end. See issue #28183. */
+                00,
+        };
+        static const uint8_t duid[] = {
+                0x00, 0x00, 0xab, 0x11, 0x5c, 0x6b, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
+        };
+        _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
+        _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
+
+        assert_se(sd_dhcp6_client_new(&client) >= 0);
+        assert_se(sd_dhcp6_client_set_iaid(client, 0xaabbccdd) >= 0);
+        assert_se(sd_dhcp6_client_set_duid_raw(client, 2, duid, sizeof(duid)) >= 0);
+
+        assert_se(dhcp6_lease_new_from_message(client, (const DHCP6Message*) msg, sizeof(msg), NULL, NULL, &lease) >= 0);
+}
+
+static const uint8_t msg_information_request[] = {
+        /* Message type */
+        DHCP6_MESSAGE_INFORMATION_REQUEST,
+        /* Transaction ID */
+        0x0f, 0xb4, 0xe5,
+        /* MUD URL */
+        /* ORO */
+        0x00, SD_DHCP6_OPTION_ORO, 0x00, 0x0c,
+        0x00, SD_DHCP6_OPTION_DNS_SERVER,
+        0x00, SD_DHCP6_OPTION_DOMAIN,
+        0x00, SD_DHCP6_OPTION_SNTP_SERVER,
+        0x00, SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME,
+        0x00, SD_DHCP6_OPTION_NTP_SERVER,
+        0x00, SD_DHCP6_OPTION_INF_MAX_RT,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Extra options */
+        /* Elapsed time */
+        0x00, SD_DHCP6_OPTION_ELAPSED_TIME, 0x00, 0x02,
+        0x00, 0x00,
+};
+
+static const uint8_t msg_solicit[] = {
+        /* Message type */
+        DHCP6_MESSAGE_SOLICIT,
+        /* Transaction ID */
+        0x0f, 0xb4, 0xe5,
+        /* Rapid commit */
+        0x00, SD_DHCP6_OPTION_RAPID_COMMIT, 0x00, 0x00,
+        /* IA_NA */
+        0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x0c,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* IA_PD */
+        0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x0c,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* Client FQDN */
+        0x00, SD_DHCP6_OPTION_CLIENT_FQDN, 0x00, 0x11,
+        DHCP6_FQDN_FLAG_S,
+        0x04, 'h', 'o', 's', 't', 0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* User Class */
+        /* Vendor Class */
+        /* Vendor Options */
+        /* MUD URL */
+        /* ORO */
+        0x00, SD_DHCP6_OPTION_ORO, 0x00, 0x0a,
+        0x00, SD_DHCP6_OPTION_DNS_SERVER,
+        0x00, SD_DHCP6_OPTION_DOMAIN,
+        0x00, SD_DHCP6_OPTION_SNTP_SERVER,
+        0x00, SD_DHCP6_OPTION_NTP_SERVER,
+        0x00, SD_DHCP6_OPTION_SOL_MAX_RT,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Extra options */
+        /* Elapsed time */
+        0x00, SD_DHCP6_OPTION_ELAPSED_TIME, 0x00, 0x02,
+        0x00, 0x00,
+};
+
+static const uint8_t msg_request[] = {
+        /* Message type */
+        DHCP6_MESSAGE_REQUEST,
+        /* Transaction ID */
+        0x00, 0x00, 0x00,
+        /* Server ID */
+        0x00, SD_DHCP6_OPTION_SERVERID, 0x00, 0x0e,
+        SERVER_ID_BYTES,
+        /* IA_NA */
+        0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x44,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS1_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS2_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        /* IA_PD */
+        0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x46,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX1_BYTES,
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX2_BYTES,
+        /* Client FQDN */
+        0x00, SD_DHCP6_OPTION_CLIENT_FQDN, 0x00, 0x11,
+        DHCP6_FQDN_FLAG_S,
+        0x04, 'h', 'o', 's', 't', 0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* User Class */
+        /* Vendor Class */
+        /* Vendor Options */
+        /* MUD URL */
+        /* ORO */
+        0x00, SD_DHCP6_OPTION_ORO, 0x00, 0x08,
+        0x00, SD_DHCP6_OPTION_DNS_SERVER,
+        0x00, SD_DHCP6_OPTION_DOMAIN,
+        0x00, SD_DHCP6_OPTION_SNTP_SERVER,
+        0x00, SD_DHCP6_OPTION_NTP_SERVER,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Extra options */
+        /* Elapsed time */
+        0x00, SD_DHCP6_OPTION_ELAPSED_TIME, 0x00, 0x02,
+        0x00, 0x00,
+};
+
+/* RFC 3315 section 18.1.6. The DHCP6 Release message must include:
+    - transaction id
+    - server identifier
+    - client identifier
+    - all released IA with addresses included
+    - elapsed time (required for all messages).
+    All other options aren't required. */
+static const uint8_t msg_release[] = {
+        /* Message type */
+        DHCP6_MESSAGE_RELEASE,
+        /* Transaction ID */
+        0x00, 0x00, 0x00,
+        /* Server ID */
+        0x00, SD_DHCP6_OPTION_SERVERID, 0x00, 0x0e,
+        SERVER_ID_BYTES,
+        /* IA_NA */
+        0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x44,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS1_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS2_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        /* IA_PD */
+        0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x46,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x00, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x00, /* lifetime T2 */
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX1_BYTES,
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x00, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0x00, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX2_BYTES,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Extra options */
+        /* Elapsed time */
+        0x00, SD_DHCP6_OPTION_ELAPSED_TIME, 0x00, 0x02,
+        0x00, 0x00,
+};
+
+static const uint8_t msg_reply[] = {
+        /* Message type */
+        DHCP6_MESSAGE_REPLY,
+        /* Transaction ID */
+        0x0f, 0xb4, 0xe5,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Server ID */
+        0x00, SD_DHCP6_OPTION_SERVERID, 0x00, 0x0e,
+        SERVER_ID_BYTES,
+        /* Rapid commit */
+        0x00, SD_DHCP6_OPTION_RAPID_COMMIT, 0x00, 0x01,
+        0x00,
+        /* IA_NA */
+        0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x66,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x50, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x78, /* lifetime T2 */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS2_BYTES,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS1_BYTES,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        /* IA_NA (status code suboption) */
+        0x00, SD_DHCP6_OPTION_STATUS_CODE, 0x00, 0x1e,
+        0x00, 0x00, /* status code */
+        0x41, 0x6c, 0x6c, 0x20, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x65, 0x73, 0x20, 0x77, 0x65,
+        0x72, 0x65, 0x20, 0x61, 0x73, 0x73, 0x69, 0x67, 0x6e, 0x65, 0x64, 0x2e, /* status message */
+        /* IA_PD */
+        0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x46,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x50, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x78, /* lifetime T2 */
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX2_BYTES,
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX1_BYTES,
+        /* DNS servers */
+        0x00, SD_DHCP6_OPTION_DNS_SERVER, 0x00, 0x20,
+        DNS1_BYTES,
+        DNS2_BYTES,
+        /* SNTP servers */
+        0x00, SD_DHCP6_OPTION_SNTP_SERVER, 0x00, 0x20,
+        SNTP1_BYTES,
+        SNTP2_BYTES,
+        /* NTP servers */
+        0x00, SD_DHCP6_OPTION_NTP_SERVER, 0x00, 0x37,
+        /* NTP server (address suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_ADDR, 0x00, 0x10,
+        NTP1_BYTES,
+        /* NTP server (address suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_ADDR, 0x00, 0x10,
+        NTP2_BYTES,
+        /* NTP server (fqdn suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_FQDN, 0x00, 0x0b,
+        0x03, 'n', 't', 'p', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* Domain list */
+        0x00, SD_DHCP6_OPTION_DOMAIN, 0x00, 0x0b,
+        0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* Client FQDN */
+        0x00, SD_DHCP6_OPTION_CLIENT_FQDN, 0x00, 0x12,
+        0x01, 0x06, 'c', 'l', 'i', 'e', 'n', 't', 0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a',
+        /* Vendor specific options */
+        0x00, SD_DHCP6_OPTION_VENDOR_OPTS, 0x00, 0x09,
+        0x00, 0x00, 0x00, 0x20, 0x00, 0xf7, 0x00, 0x01, VENDOR_SUBOPTION_BYTES,
+};
+
+static const uint8_t msg_advertise[] = {
+        /* Message type */
+        DHCP6_MESSAGE_ADVERTISE,
+        /* Transaction ID */
+        0x0f, 0xb4, 0xe5,
+        /* Client ID */
+        0x00, SD_DHCP6_OPTION_CLIENTID, 0x00, 0x0e,
+        CLIENT_ID_BYTES,
+        /* Server ID */
+        0x00, SD_DHCP6_OPTION_SERVERID, 0x00, 0x0e,
+        SERVER_ID_BYTES,
+        /* Preference */
+        0x00, SD_DHCP6_OPTION_PREFERENCE, 0x00, 0x01,
+        0xff,
+        /* IA_NA */
+        0x00, SD_DHCP6_OPTION_IA_NA, 0x00, 0x7a,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x50, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x78, /* lifetime T2 */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS2_BYTES, /* address */
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        /* IA_NA (IAADDR suboption) */
+        0x00, SD_DHCP6_OPTION_IAADDR, 0x00, 0x18,
+        IA_NA_ADDRESS1_BYTES, /* address */
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        /* IA_NA (status code suboption) */
+        0x00, SD_DHCP6_OPTION_STATUS_CODE, 0x00, 0x32,
+        0x00, 0x00, /* status code */
+        0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x28, 0x65, 0x73, 0x29, 0x20, 0x72, 0x65, 0x6e, 0x65,
+        0x77, 0x65, 0x64, 0x2e, 0x20, 0x47, 0x72, 0x65, 0x65, 0x74, 0x69, 0x6e, 0x67, 0x73, 0x20, 0x66,
+        0x72, 0x6f, 0x6d, 0x20, 0x70, 0x6c, 0x61, 0x6e, 0x65, 0x74, 0x20, 0x45, 0x61, 0x72, 0x74, 0x68, /* status message */
+        /* IA_PD */
+        0x00, SD_DHCP6_OPTION_IA_PD, 0x00, 0x46,
+        IA_ID_BYTES,
+        0x00, 0x00, 0x00, 0x50, /* lifetime T1 */
+        0x00, 0x00, 0x00, 0x78, /* lifetime T2 */
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX2_BYTES,
+        /* IA_PD (IA_PD_PREFIX suboption) */
+        0x00, SD_DHCP6_OPTION_IA_PD_PREFIX, 0x00, 0x19,
+        0x00, 0x00, 0x00, 0x96, /* preferred lifetime */
+        0x00, 0x00, 0x00, 0xb4, /* valid lifetime */
+        0x40, /* prefixlen */
+        IA_PD_PREFIX1_BYTES,
+        /* DNS servers */
+        0x00, SD_DHCP6_OPTION_DNS_SERVER, 0x00, 0x20,
+        DNS1_BYTES,
+        DNS2_BYTES,
+        /* SNTP servers */
+        0x00, SD_DHCP6_OPTION_SNTP_SERVER, 0x00, 0x20,
+        SNTP1_BYTES,
+        SNTP2_BYTES,
+        /* NTP servers */
+        0x00, SD_DHCP6_OPTION_NTP_SERVER, 0x00, 0x37,
+        /* NTP server (address suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_ADDR, 0x00, 0x10,
+        NTP1_BYTES,
+        /* NTP server (address suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_ADDR, 0x00, 0x10,
+        NTP2_BYTES,
+        /* NTP server (fqdn suboption) */
+        0x00, DHCP6_NTP_SUBOPTION_SRV_FQDN, 0x00, 0x0b,
+        0x03, 'n', 't', 'p', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* Domain list */
+        0x00, SD_DHCP6_OPTION_DOMAIN, 0x00, 0x0b,
+        0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a', 0x00,
+        /* Client FQDN */
+        0x00, SD_DHCP6_OPTION_CLIENT_FQDN, 0x00, 0x12,
+        0x01, 0x06, 'c', 'l', 'i', 'e', 'n', 't', 0x03, 'l', 'a', 'b', 0x05, 'i', 'n', 't', 'r', 'a',
+        /* Vendor specific options */
+        0x00, SD_DHCP6_OPTION_VENDOR_OPTS, 0x00, 0x09,
+        0x00, 0x00, 0x00, 0x20, 0x00, 0xf7, 0x00, 0x01, VENDOR_SUBOPTION_BYTES,
+};
+
+static void test_client_verify_information_request(const DHCP6Message *msg, size_t len) {
+        log_debug("/* %s */", __func__);
+
+        assert_se(len == sizeof(msg_information_request));
+        /* The elapsed time value is not deterministic. Skip it. */
+        assert_se(memcmp(msg, msg_information_request, len - sizeof(be16_t)) == 0);
+}
+
+static void test_client_verify_solicit(const DHCP6Message *msg, size_t len) {
+        log_debug("/* %s */", __func__);
+
+        assert_se(len == sizeof(msg_solicit));
+        /* The elapsed time value is not deterministic. Skip it. */
+        assert_se(memcmp(msg, msg_solicit, len - sizeof(be16_t)) == 0);
+}
+
+static void test_client_verify_release(const DHCP6Message *msg, size_t len) {
+        log_debug("/* %s */", __func__);
+
+        assert_se(len == sizeof(msg_release));
+        assert_se(msg->type == DHCP6_MESSAGE_RELEASE);
+        /* The transaction ID and elapsed time value are not deterministic. Skip them. */
+        assert_se(memcmp(msg->options, msg_release + offsetof(DHCP6Message, options),
+                         len - offsetof(DHCP6Message, options) - sizeof(be16_t)) == 0);
+}
+
+static void test_client_verify_request(const DHCP6Message *msg, size_t len) {
+        log_debug("/* %s */", __func__);
+
+        assert_se(len == sizeof(msg_request));
+        assert_se(msg->type == DHCP6_MESSAGE_REQUEST);
+        /* The transaction ID and elapsed time value are not deterministic. Skip them. */
+        assert_se(memcmp(msg->options, msg_request + offsetof(DHCP6Message, options),
+                         len - offsetof(DHCP6Message, options) - sizeof(be16_t)) == 0);
+}
+
+static void test_lease_common(sd_dhcp6_client *client) {
+        sd_dhcp6_lease *lease;
+        sd_dhcp6_option **suboption;
+        const struct in6_addr *addrs;
+        const char *str;
+        char **strv;
+        uint8_t *id;
+        size_t len;
+
+        assert_se(sd_dhcp6_client_get_lease(client, &lease) >= 0);
+
+        assert_se(dhcp6_lease_get_clientid(lease, &id, &len) >= 0);
+        assert_se(memcmp_nn(id, len, client_id, sizeof(client_id)) == 0);
+
+        assert_se(sd_dhcp6_lease_get_domains(lease, &strv) == 1);
+        assert_se(streq(strv[0], "lab.intra"));
+        assert_se(!strv[1]);
+
+        assert_se(sd_dhcp6_lease_get_fqdn(lease, &str) >= 0);
+        assert_se(streq(str, "client.lab.intra"));
+
+        assert_se(sd_dhcp6_lease_get_dns(lease, &addrs) == 2);
+        assert_se(in6_addr_equal(&addrs[0], &dns1));
+        assert_se(in6_addr_equal(&addrs[1], &dns2));
+
+        assert_se(sd_dhcp6_lease_get_ntp_addrs(lease, &addrs) == 2);
+        assert_se(in6_addr_equal(&addrs[0], &ntp1));
+        assert_se(in6_addr_equal(&addrs[1], &ntp2));
+
+        assert_se(sd_dhcp6_lease_get_ntp_fqdn(lease, &strv) == 1);
+        assert_se(streq(strv[0], "ntp.intra"));
+        assert_se(!strv[1]);
+
+        assert_se(lease->sntp_count == 2);
+        assert_se(in6_addr_equal(&lease->sntp[0], &sntp1));
+        assert_se(in6_addr_equal(&lease->sntp[1], &sntp2));
+
+        assert_se(sd_dhcp6_lease_get_vendor_options(lease, &suboption) > 0);
+        assert_se((*suboption)->enterprise_identifier == vendor_suboption.enterprise_identifier);
+        assert_se((*suboption)->option == vendor_suboption.option);
+        assert_se(*(uint8_t*)(*suboption)->data == *(uint8_t*)vendor_suboption.data);
+}
+
+static void test_lease_managed(sd_dhcp6_client *client) {
+        sd_dhcp6_lease *lease;
+        struct in6_addr addr;
+        usec_t lt_pref, lt_valid;
+        uint8_t *id, prefixlen;
+        size_t len;
+
+        assert_se(sd_dhcp6_client_get_lease(client, &lease) >= 0);
+
+        assert_se(dhcp6_lease_get_serverid(lease, &id, &len) >= 0);
+        assert_se(memcmp_nn(id, len, server_id, sizeof(server_id)) == 0);
+
+        assert_se(sd_dhcp6_lease_has_address(lease));
+        assert_se(sd_dhcp6_lease_has_pd_prefix(lease));
+
+        for (unsigned i = 0; i < 2; i++) {
+                assert_se(sd_dhcp6_lease_address_iterator_reset(lease));
+                assert_se(sd_dhcp6_lease_get_address(lease, &addr) >= 0);
+                assert_se(sd_dhcp6_lease_get_address_lifetime(lease, &lt_pref, &lt_valid) >= 0);
+                assert_se(in6_addr_equal(&addr, &ia_na_address1));
+                assert_se(lt_pref == 150 * USEC_PER_SEC);
+                assert_se(lt_valid == 180 * USEC_PER_SEC);
+                assert_se(sd_dhcp6_lease_address_iterator_next(lease));
+                assert_se(sd_dhcp6_lease_get_address(lease, &addr) >= 0);
+                assert_se(sd_dhcp6_lease_get_address_lifetime(lease, &lt_pref, &lt_valid) >= 0);
+                assert_se(in6_addr_equal(&addr, &ia_na_address2));
+                assert_se(lt_pref == 150 * USEC_PER_SEC);
+                assert_se(lt_valid == 180 * USEC_PER_SEC);
+                assert_se(!sd_dhcp6_lease_address_iterator_next(lease));
+
+                assert_se(sd_dhcp6_lease_pd_iterator_reset(lease));
+                assert_se(sd_dhcp6_lease_get_pd_prefix(lease, &addr, &prefixlen) >= 0);
+                assert_se(sd_dhcp6_lease_get_pd_lifetime(lease, &lt_pref, &lt_valid) >= 0);
+                assert_se(in6_addr_equal(&addr, &ia_pd_prefix1));
+                assert_se(prefixlen == 64);
+                assert_se(lt_pref == 150 * USEC_PER_SEC);
+                assert_se(lt_valid == 180 * USEC_PER_SEC);
+                assert_se(sd_dhcp6_lease_pd_iterator_next(lease));
+                assert_se(sd_dhcp6_lease_get_pd_prefix(lease, &addr, &prefixlen) >= 0);
+                assert_se(sd_dhcp6_lease_get_pd_lifetime(lease, &lt_pref, &lt_valid) >= 0);
+                assert_se(in6_addr_equal(&addr, &ia_pd_prefix2));
+                assert_se(prefixlen == 64);
+                assert_se(lt_pref == 150 * USEC_PER_SEC);
+                assert_se(lt_valid == 180 * USEC_PER_SEC);
+                assert_se(!sd_dhcp6_lease_pd_iterator_next(lease));
+        }
+
+        test_lease_common(client);
+}
+
+static void test_client_callback(sd_dhcp6_client *client, int event, void *userdata) {
+        switch (event) {
+        case SD_DHCP6_CLIENT_EVENT_STOP:
+                log_debug("/* %s (event=stop) */", __func__);
+                return;
+
+        case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
+                log_debug("/* %s (event=information-request) */", __func__);
+
+                assert_se(test_client_sent_message_count == 1);
+
+                test_lease_common(client);
+
+                assert_se(sd_dhcp6_client_set_information_request(client, false) >= 0);
+                assert_se(sd_dhcp6_client_start(client) >= 0);
+                assert_se(dhcp6_client_set_transaction_id(client, ((const DHCP6Message*) msg_advertise)->transaction_id) >= 0);
+                break;
+
+        case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
+                log_debug("/* %s (event=ip-acquire) */", __func__);
+
+                assert_se(IN_SET(test_client_sent_message_count, 3, 5));
+
+                test_lease_managed(client);
+
+                switch (test_client_sent_message_count) {
+                case 3:
+                        assert_se(sd_dhcp6_client_stop(client) >= 0);
+                        assert_se(sd_dhcp6_client_start(client) >= 0);
+                        assert_se(dhcp6_client_set_transaction_id(client, ((const DHCP6Message*) msg_reply)->transaction_id) >= 0);
+                        break;
+
+                case 5:
+                        assert_se(sd_event_exit(sd_dhcp6_client_get_event(client), 0) >= 0);
+                        break;
+
+                default:
+                        assert_not_reached();
+                }
+
+                break;
+
+        case DHCP6_CLIENT_EVENT_TEST_ADVERTISED: {
+                sd_dhcp6_lease *lease;
+                uint8_t preference;
+
+                log_debug("/* %s (event=test-advertised) */", __func__);
+
+                assert_se(test_client_sent_message_count == 2);
+
+                test_lease_managed(client);
+
+                assert_se(sd_dhcp6_client_get_lease(client, &lease) >= 0);
+                assert_se(dhcp6_lease_get_preference(lease, &preference) >= 0);
+                assert_se(preference == 0xff);
+
+                assert_se(dhcp6_client_set_transaction_id(client, ((const DHCP6Message*) msg_reply)->transaction_id) >= 0);
+                break;
+        }
+        default:
+                assert_not_reached();
+        }
+}
+
+int dhcp6_network_send_udp_socket(int s, struct in6_addr *a, const void *packet, size_t len) {
+        log_debug("/* %s(count=%u) */", __func__, test_client_sent_message_count);
+
+        assert_se(a);
+        assert_se(in6_addr_equal(a, &mcast_address));
+        assert_se(packet);
+        assert_se(len >= sizeof(DHCP6Message));
+
+        switch (test_client_sent_message_count) {
+        case 0:
+                test_client_verify_information_request(packet, len);
+                assert_se(write(test_fd[1], msg_reply, sizeof(msg_reply)) == sizeof(msg_reply));
+                break;
+
+        case 1:
+                test_client_verify_solicit(packet, len);
+                assert_se(write(test_fd[1], msg_advertise, sizeof(msg_advertise)) == sizeof(msg_advertise));
+                break;
+
+        case 2:
+                test_client_callback(client_ref, DHCP6_CLIENT_EVENT_TEST_ADVERTISED, NULL);
+                test_client_verify_request(packet, len);
+                assert_se(write(test_fd[1], msg_reply, sizeof(msg_reply)) == sizeof(msg_reply));
+                break;
+
+        case 3:
+                test_client_verify_release(packet, len);
+                /* when stopping, dhcp6 client doesn't wait for release server reply */
+                assert_se(write(test_fd[1], msg_reply, sizeof(msg_reply)) == sizeof(msg_reply));
+                break;
+
+        case 4:
+                test_client_verify_solicit(packet, len);
+                assert_se(write(test_fd[1], msg_reply, sizeof(msg_reply)) == sizeof(msg_reply));
+                break;
+
+        default:
+                assert_not_reached();
+        }
+
+        test_client_sent_message_count++;
+        return len;
+}
+
+int dhcp6_network_bind_udp_socket(int ifindex, struct in6_addr *a) {
+        assert_se(ifindex == test_ifindex);
+        assert_se(a);
+        assert_se(in6_addr_equal(a, &local_address));
+
+        assert_se(socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) >= 0);
+        return TAKE_FD(test_fd[0]);
+}
+
+TEST(dhcp6_client) {
+        _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
+        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+
+        assert_se(sd_event_new(&e) >= 0);
+        assert_se(sd_event_add_time_relative(e, NULL, CLOCK_BOOTTIME,
+                                             2 * USEC_PER_SEC, 0,
+                                             NULL, INT_TO_PTR(-ETIMEDOUT)) >= 0);
+
+        assert_se(sd_dhcp6_client_new(&client) >= 0);
+        assert_se(sd_dhcp6_client_attach_event(client, e, 0) >= 0);
+        assert_se(sd_dhcp6_client_set_ifindex(client, test_ifindex) == 0);
+        assert_se(sd_dhcp6_client_set_local_address(client, &local_address) >= 0);
+        assert_se(sd_dhcp6_client_set_fqdn(client, "host.lab.intra") >= 0);
+        assert_se(sd_dhcp6_client_set_iaid(client, unaligned_read_be32((uint8_t[]) { IA_ID_BYTES })) >= 0);
+        assert_se(sd_dhcp6_client_set_send_release(client, true) >= 0);
+
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DNS_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DOMAIN) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NTP_SERVER) >= 0);
+        assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_SNTP_SERVER) >= 0);
+
+        assert_se(sd_dhcp6_client_set_information_request(client, true) >= 0);
+        assert_se(sd_dhcp6_client_set_callback(client, test_client_callback, NULL) >= 0);
+
+        assert_se(sd_dhcp6_client_start(client) >= 0);
+
+        assert_se(dhcp6_client_set_transaction_id(client, ((const DHCP6Message*) msg_reply)->transaction_id) >= 0);
+
+        assert_se(client_ref = sd_dhcp6_client_ref(client));
+
+        assert_se(sd_event_loop(e) >= 0);
+
+        assert_se(test_client_sent_message_count == 5);
+
+        assert_se(!sd_dhcp6_client_unref(client_ref));
+        test_fd[1] = safe_close(test_fd[1]);
+}
+
+static int intro(void) {
+        assert_se(setenv("SYSTEMD_NETWORK_TEST_MODE", "1", 1) >= 0);
+        return 0;
+}
+
+DEFINE_TEST_MAIN_WITH_INTRO(LOG_DEBUG, intro);