+ client_notify(client, error);
+
+ client_reset(client);
+}
+
+static int client_send_message(sd_dhcp6_client *client, usec_t time_now) {
+ _cleanup_free_ DHCP6Message *message = NULL;
+ struct in6_addr all_servers =
+ IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
+ size_t len, optlen = 512;
+ uint8_t *opt;
+ int r;
+ usec_t elapsed_usec;
+ be16_t elapsed_time;
+
+ len = sizeof(DHCP6Message) + optlen;
+
+ message = malloc0(len);
+ if (!message)
+ return -ENOMEM;
+
+ opt = (uint8_t *)(message + 1);
+
+ message->transaction_id = client->transaction_id;
+
+ switch(client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ message->type = DHCP6_INFORMATION_REQUEST;
+
+ break;
+
+ case DHCP6_STATE_SOLICITATION:
+ message->type = DHCP6_SOLICIT;
+
+ r = dhcp6_option_append(&opt, &optlen,
+ DHCP6_OPTION_RAPID_COMMIT, 0, NULL);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_option_append_ia(&opt, &optlen, &client->ia_na);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+
+ if (client->state == DHCP6_STATE_REQUEST)
+ message->type = DHCP6_REQUEST;
+ else
+ message->type = DHCP6_RENEW;
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_SERVERID,
+ client->lease->serverid_len,
+ client->lease->serverid);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_STATE_REBIND:
+ message->type = DHCP6_REBIND;
+
+ r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_STATE_STOPPED:
+ case DHCP6_STATE_BOUND:
+ return -EINVAL;
+ }
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_ORO,
+ client->req_opts_len * sizeof(be16_t),
+ client->req_opts);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_CLIENTID,
+ client->duid_len, &client->duid);
+ if (r < 0)
+ return r;
+
+ elapsed_usec = time_now - client->transaction_start;
+ if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10)
+ elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10);
+ else
+ elapsed_time = 0xffff;
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_ELAPSED_TIME,
+ sizeof(elapsed_time), &elapsed_time);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message,
+ len - optlen);
+ if (r < 0)
+ return r;
+
+ log_dhcp6_client(client, "Sent %s",
+ dhcp6_message_type_to_string(message->type));
+
+ return 0;
+}
+
+static int client_timeout_t2(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ sd_dhcp6_client *client = userdata;
+
+ assert_return(s, -EINVAL);
+ assert_return(client, -EINVAL);
+ assert_return(client->lease, -EINVAL);
+
+ client->lease->ia.timeout_t2 =
+ sd_event_source_unref(client->lease->ia.timeout_t2);
+
+ log_dhcp6_client(client, "Timeout T2");
+
+ client_start(client, DHCP6_STATE_REBIND);
+
+ return 0;
+}
+
+static int client_timeout_t1(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ sd_dhcp6_client *client = userdata;
+
+ assert_return(s, -EINVAL);
+ assert_return(client, -EINVAL);
+ assert_return(client->lease, -EINVAL);
+
+ client->lease->ia.timeout_t1 =
+ sd_event_source_unref(client->lease->ia.timeout_t1);
+
+ log_dhcp6_client(client, "Timeout T1");
+
+ client_start(client, DHCP6_STATE_RENEW);
+
+ return 0;
+}
+
+static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ sd_dhcp6_client *client = userdata;
+ DHCP6_CLIENT_DONT_DESTROY(client);
+ enum DHCP6State state;
+
+ assert(s);
+ assert(client);
+ assert(client->event);
+
+ state = client->state;
+
+ client_stop(client, DHCP6_EVENT_RESEND_EXPIRE);
+
+ /* RFC 3315, section 18.1.4., says that "...the client may choose to
+ use a Solicit message to locate a new DHCP server..." */
+ if (state == DHCP6_STATE_REBIND)
+ client_start(client, DHCP6_STATE_SOLICITATION);
+
+ return 0;
+}
+
+static usec_t client_timeout_compute_random(usec_t val) {
+ return val - val / 10 +
+ (random_u32() % (2 * USEC_PER_SEC)) * val / 10 / USEC_PER_SEC;
+}
+
+static int client_timeout_resend(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ int r = 0;
+ sd_dhcp6_client *client = userdata;
+ usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0;
+ usec_t max_retransmit_duration = 0;
+ uint8_t max_retransmit_count = 0;
+ char time_string[FORMAT_TIMESPAN_MAX];
+ uint32_t expire = 0;
+
+ assert(s);
+ assert(client);
+ assert(client->event);
+
+ client->timeout_resend = sd_event_source_unref(client->timeout_resend);
+
+ switch (client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ init_retransmit_time = DHCP6_INF_TIMEOUT;
+ max_retransmit_time = DHCP6_INF_MAX_RT;
+
+ break;
+
+ case DHCP6_STATE_SOLICITATION:
+
+ if (client->retransmit_count && client->lease) {
+ client_start(client, DHCP6_STATE_REQUEST);
+ return 0;
+ }
+
+ init_retransmit_time = DHCP6_SOL_TIMEOUT;
+ max_retransmit_time = DHCP6_SOL_MAX_RT;
+
+ break;
+
+ case DHCP6_STATE_REQUEST:
+ init_retransmit_time = DHCP6_REQ_TIMEOUT;
+ max_retransmit_time = DHCP6_REQ_MAX_RT;
+ max_retransmit_count = DHCP6_REQ_MAX_RC;
+
+ break;
+
+ case DHCP6_STATE_RENEW:
+ init_retransmit_time = DHCP6_REN_TIMEOUT;
+ max_retransmit_time = DHCP6_REN_MAX_RT;
+
+ /* RFC 3315, section 18.1.3. says max retransmit duration will
+ be the remaining time until T2. Instead of setting MRD,
+ wait for T2 to trigger with the same end result */
+
+ break;
+
+ case DHCP6_STATE_REBIND:
+ init_retransmit_time = DHCP6_REB_TIMEOUT;
+ max_retransmit_time = DHCP6_REB_MAX_RT;
+
+ if (!client->timeout_resend_expire) {
+ r = dhcp6_lease_ia_rebind_expire(&client->lease->ia,
+ &expire);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+ max_retransmit_duration = expire * USEC_PER_SEC;
+ }
+
+ break;
+
+ case DHCP6_STATE_STOPPED:
+ case DHCP6_STATE_BOUND:
+ return 0;
+ }
+
+ if (max_retransmit_count &&
+ client->retransmit_count >= max_retransmit_count) {
+ client_stop(client, DHCP6_EVENT_RETRANS_MAX);
+ return 0;
+ }
+
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
+ if (r < 0)
+ goto error;
+
+ r = client_send_message(client, time_now);
+ if (r >= 0)
+ client->retransmit_count++;
+
+ if (!client->retransmit_time) {
+ client->retransmit_time =
+ client_timeout_compute_random(init_retransmit_time);
+
+ if (client->state == DHCP6_STATE_SOLICITATION)
+ client->retransmit_time += init_retransmit_time / 10;
+
+ } else {
+ if (max_retransmit_time &&
+ client->retransmit_time > max_retransmit_time / 2)
+ client->retransmit_time = client_timeout_compute_random(max_retransmit_time);
+ else
+ client->retransmit_time += client_timeout_compute_random(client->retransmit_time);
+ }
+
+ log_dhcp6_client(client, "Next retransmission in %s",
+ format_timespan(time_string, FORMAT_TIMESPAN_MAX,
+ client->retransmit_time, 0));
+
+ r = sd_event_add_time(client->event, &client->timeout_resend,
+ clock_boottime_or_monotonic(),
+ time_now + client->retransmit_time,
+ 10 * USEC_PER_MSEC, client_timeout_resend,
+ client);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->timeout_resend,
+ client->event_priority);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timer");
+ if (r < 0)
+ goto error;
+
+ if (max_retransmit_duration && !client->timeout_resend_expire) {
+
+ log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs",
+ max_retransmit_duration / USEC_PER_SEC);
+
+ r = sd_event_add_time(client->event,
+ &client->timeout_resend_expire,
+ clock_boottime_or_monotonic(),
+ time_now + max_retransmit_duration,
+ USEC_PER_SEC,
+ client_timeout_resend_expire, client);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->timeout_resend_expire,
+ client->event_priority);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_description(client->timeout_resend_expire, "dhcp6-resend-expire-timer");
+ if (r < 0)
+ goto error;
+ }
+
+error:
+ if (r < 0)
+ client_stop(client, r);
+
+ return 0;
+}
+
+static int client_ensure_iaid(sd_dhcp6_client *client) {
+ /* name is a pointer to memory in the udev_device struct, so must
+ have the same scope */
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+ const char *name = NULL;
+ uint64_t id;
+
+ assert(client);
+
+ if (client->ia_na.id)
+ return 0;
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ _cleanup_udev_unref_ struct udev *udev;
+ char ifindex_str[2 + DECIMAL_STR_MAX(int)];
+
+ udev = udev_new();
+ if (!udev)
+ return -ENOMEM;
+
+ sprintf(ifindex_str, "n%d", client->index);
+ device = udev_device_new_from_device_id(udev, ifindex_str);
+ if (!device)
+ return -errno;
+
+ if (udev_device_get_is_initialized(device) <= 0)
+ /* not yet ready */
+ return -EBUSY;
+
+ name = net_get_name(device);
+ }
+
+ if (name)
+ siphash24((uint8_t*)&id, name, strlen(name), HASH_KEY.bytes);
+ else
+ /* fall back to mac address if no predictable name available */
+ siphash24((uint8_t*)&id, &client->mac_addr,
+ client->mac_addr_len, HASH_KEY.bytes);
+
+ /* fold into 32 bits */
+ client->ia_na.id = (id & 0xffffffff) ^ (id >> 32);
+
+ return 0;
+}
+
+static int client_parse_message(sd_dhcp6_client *client,
+ DHCP6Message *message, size_t len,
+ sd_dhcp6_lease *lease) {
+ int r;
+ uint8_t *optval, *option, *id = NULL;
+ uint16_t optcode, status;
+ size_t optlen, id_len;
+ bool clientid = false;
+ be32_t iaid_lease;
+
+ option = (uint8_t *)message + sizeof(DHCP6Message);
+ len -= sizeof(DHCP6Message);
+
+ while ((r = dhcp6_option_parse(&option, &len, &optcode, &optlen,
+ &optval)) >= 0) {
+ switch (optcode) {
+ case DHCP6_OPTION_CLIENTID:
+ if (clientid) {
+ log_dhcp6_client(client, "%s contains multiple clientids",
+ dhcp6_message_type_to_string(message->type));
+ return -EINVAL;
+ }
+
+ if (optlen != client->duid_len ||
+ memcmp(&client->duid, optval, optlen) != 0) {
+ log_dhcp6_client(client, "%s DUID does not match",
+ dhcp6_message_type_to_string(message->type));
+
+ return -EINVAL;
+ }
+ clientid = true;
+
+ break;
+
+ case DHCP6_OPTION_SERVERID:
+ r = dhcp6_lease_get_serverid(lease, &id, &id_len);
+ if (r >= 0 && id) {
+ log_dhcp6_client(client, "%s contains multiple serverids",
+ dhcp6_message_type_to_string(message->type));
+ return -EINVAL;
+ }
+
+ r = dhcp6_lease_set_serverid(lease, optval, optlen);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_OPTION_PREFERENCE:
+ if (optlen != 1)
+ return -EINVAL;
+
+ r = dhcp6_lease_set_preference(lease, *optval);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_OPTION_STATUS_CODE:
+ if (optlen < 2)
+ return -EINVAL;
+
+ status = optval[0] << 8 | optval[1];
+ if (status) {
+ log_dhcp6_client(client, "%s Status %s",
+ dhcp6_message_type_to_string(message->type),
+ dhcp6_message_status_to_string(status));
+ return -EINVAL;
+ }
+
+ break;
+
+ case DHCP6_OPTION_IA_NA:
+ if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
+ log_dhcp6_client(client, "Information request ignoring IA NA option");
+
+ break;
+ }
+
+ r = dhcp6_option_parse_ia(&optval, &optlen, optcode,
+ &lease->ia);
+ if (r < 0 && r != -ENOMSG)
+ return r;
+
+ r = dhcp6_lease_get_iaid(lease, &iaid_lease);
+ if (r < 0)
+ return r;
+
+ if (client->ia_na.id != iaid_lease) {
+ log_dhcp6_client(client, "%s has wrong IAID",
+ dhcp6_message_type_to_string(message->type));
+ return -EINVAL;
+ }
+
+ break;
+
+ case DHCP6_OPTION_RAPID_COMMIT:
+ r = dhcp6_lease_set_rapid_commit(lease);
+ if (r < 0)
+ return r;
+
+ break;
+ }
+ }
+
+ if (r == -ENOMSG)
+ r = 0;
+
+ if (r < 0 || !clientid) {
+ log_dhcp6_client(client, "%s has incomplete options",
+ dhcp6_message_type_to_string(message->type));
+ return -EINVAL;
+ }
+
+ if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
+ r = dhcp6_lease_get_serverid(lease, &id, &id_len);
+ if (r < 0)
+ log_dhcp6_client(client, "%s has no server id",
+ dhcp6_message_type_to_string(message->type));
+ }
+
+ return r;
+}
+
+static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply,
+ size_t len)
+{
+ int r;
+ _cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
+ bool rapid_commit;
+
+ if (reply->type != DHCP6_REPLY)
+ return 0;
+
+ r = dhcp6_lease_new(&lease);
+ if (r < 0)
+ return -ENOMEM;
+
+ r = client_parse_message(client, reply, len, lease);
+ if (r < 0)
+ return r;
+
+ if (client->state == DHCP6_STATE_SOLICITATION) {
+ r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit);
+ if (r < 0)
+ return r;
+
+ if (!rapid_commit)
+ return 0;
+ }
+
+ if (client->lease) {
+ dhcp6_lease_clear_timers(&client->lease->ia);
+ client->lease = sd_dhcp6_lease_unref(client->lease);
+ }
+
+ if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
+ client->lease = lease;
+ lease = NULL;
+ }
+
+ return DHCP6_STATE_BOUND;
+}
+
+static int client_receive_advertise(sd_dhcp6_client *client,
+ DHCP6Message *advertise, size_t len) {
+ int r;
+ _cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
+ uint8_t pref_advertise = 0, pref_lease = 0;
+
+ if (advertise->type != DHCP6_ADVERTISE)
+ return 0;
+
+ r = dhcp6_lease_new(&lease);
+ if (r < 0)
+ return r;
+
+ r = client_parse_message(client, advertise, len, lease);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_lease_get_preference(lease, &pref_advertise);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_lease_get_preference(client->lease, &pref_lease);
+
+ if (r < 0 || pref_advertise > pref_lease) {
+ sd_dhcp6_lease_unref(client->lease);
+ client->lease = lease;
+ lease = NULL;
+ r = 0;
+ }
+
+ if (pref_advertise == 255 || client->retransmit_count > 1)
+ r = DHCP6_STATE_REQUEST;
+
+ return r;
+}
+
+static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
+ void *userdata) {
+ sd_dhcp6_client *client = userdata;
+ DHCP6_CLIENT_DONT_DESTROY(client);
+ _cleanup_free_ DHCP6Message *message;
+ int r, buflen, len;
+
+ assert(s);
+ assert(client);
+ assert(client->event);
+
+ r = ioctl(fd, FIONREAD, &buflen);
+ if (r < 0 || buflen <= 0)
+ buflen = DHCP6_MIN_OPTIONS_SIZE;
+
+ message = malloc0(buflen);
+ if (!message)
+ return -ENOMEM;
+
+ len = read(fd, message, buflen);
+ if ((size_t)len < sizeof(DHCP6Message)) {
+ log_dhcp6_client(client, "could not receive message from UDP socket: %m");
+ return 0;
+ }
+
+ switch(message->type) {
+ case DHCP6_SOLICIT:
+ case DHCP6_REQUEST:
+ case DHCP6_CONFIRM:
+ case DHCP6_RENEW:
+ case DHCP6_REBIND:
+ case DHCP6_RELEASE:
+ case DHCP6_DECLINE:
+ case DHCP6_INFORMATION_REQUEST:
+ case DHCP6_RELAY_FORW:
+ case DHCP6_RELAY_REPL:
+ return 0;
+
+ case DHCP6_ADVERTISE:
+ case DHCP6_REPLY:
+ case DHCP6_RECONFIGURE:
+ break;
+
+ default:
+ log_dhcp6_client(client, "unknown message type %d",
+ message->type);
+ return 0;
+ }
+
+ if (client->transaction_id != (message->transaction_id &
+ htobe32(0x00ffffff)))
+ return 0;
+
+ switch (client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ r = client_receive_reply(client, message, len);
+ if (r < 0)
+ return 0;
+
+ client_notify(client, DHCP6_EVENT_INFORMATION_REQUEST);
+
+ client_start(client, DHCP6_STATE_STOPPED);
+
+ break;
+
+ case DHCP6_STATE_SOLICITATION:
+ r = client_receive_advertise(client, message, len);
+
+ if (r == DHCP6_STATE_REQUEST) {
+ client_start(client, r);
+
+ break;
+ }
+
+ /* fall through for Soliciation Rapid Commit option check */
+ case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
+
+ r = client_receive_reply(client, message, len);
+ if (r < 0)
+ return 0;
+
+ if (r == DHCP6_STATE_BOUND) {
+
+ r = client_start(client, DHCP6_STATE_BOUND);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+
+ client_notify(client, DHCP6_EVENT_IP_ACQUIRE);
+ }
+
+ break;
+
+ case DHCP6_STATE_BOUND:
+
+ break;
+
+ case DHCP6_STATE_STOPPED:
+ return 0;
+ }
+
+ if (r >= 0) {
+ log_dhcp6_client(client, "Recv %s",
+ dhcp6_message_type_to_string(message->type));
+ }
+
+ return 0;
+}
+
+static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
+{
+ int r;
+ usec_t timeout, time_now;
+ char time_string[FORMAT_TIMESPAN_MAX];
+
+ assert_return(client, -EINVAL);
+ assert_return(client->event, -EINVAL);
+ assert_return(client->index > 0, -EINVAL);
+ assert_return(client->state != state, -EINVAL);
+
+ log_dhcp6_client(client, "client state %d new state %d", client->state, state);
+ client->timeout_resend_expire =
+ sd_event_source_unref(client->timeout_resend_expire);
+ client->timeout_resend = sd_event_source_unref(client->timeout_resend);
+ client->retransmit_time = 0;
+ client->retransmit_count = 0;
+
+ if (client->state == DHCP6_STATE_STOPPED) {
+ time_now = now(clock_boottime_or_monotonic());
+ } else {
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(),
+ &time_now);
+ if (r < 0)
+ return r;
+ }
+
+ switch (state) {
+ case DHCP6_STATE_STOPPED:
+ if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
+ client->state = DHCP6_STATE_STOPPED;
+
+ return 0;
+ }
+
+ /* fall through */
+ case DHCP6_STATE_SOLICITATION:
+ client->state = DHCP6_STATE_SOLICITATION;
+
+ break;
+
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
+
+ client->state = state;
+
+ break;
+
+ case DHCP6_STATE_BOUND:
+
+ if (client->lease->ia.lifetime_t1 == 0xffffffff ||
+ client->lease->ia.lifetime_t2 == 0xffffffff) {
+
+ log_dhcp6_client(client, "infinite T1 0x%08x or T2 0x%08x",
+ be32toh(client->lease->ia.lifetime_t1),
+ be32toh(client->lease->ia.lifetime_t2));
+
+ return 0;
+ }
+
+ timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t1) * USEC_PER_SEC);
+
+ log_dhcp6_client(client, "T1 expires in %s",
+ format_timespan(time_string,
+ FORMAT_TIMESPAN_MAX,
+ timeout, 0));
+
+ r = sd_event_add_time(client->event,
+ &client->lease->ia.timeout_t1,
+ clock_boottime_or_monotonic(), time_now + timeout,
+ 10 * USEC_PER_SEC, client_timeout_t1,
+ client);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->lease->ia.timeout_t1,
+ client->event_priority);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_description(client->lease->ia.timeout_t1, "dhcp6-t1-timeout");
+ if (r < 0)
+ return r;
+
+ timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t2) * USEC_PER_SEC);
+
+ log_dhcp6_client(client, "T2 expires in %s",
+ format_timespan(time_string,
+ FORMAT_TIMESPAN_MAX,
+ timeout, 0));
+
+ r = sd_event_add_time(client->event,
+ &client->lease->ia.timeout_t2,
+ clock_boottime_or_monotonic(), time_now + timeout,
+ 10 * USEC_PER_SEC, client_timeout_t2,
+ client);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->lease->ia.timeout_t2,
+ client->event_priority);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_description(client->lease->ia.timeout_t2, "dhcp6-t2-timeout");
+ if (r < 0)
+ return r;
+
+ client->state = state;
+
+ return 0;
+ }
+
+ client->transaction_id = random_u32() & htobe32(0x00ffffff);
+ client->transaction_start = time_now;
+
+ r = sd_event_add_time(client->event, &client->timeout_resend,
+ clock_boottime_or_monotonic(), 0, 0, client_timeout_resend,
+ client);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->timeout_resend,
+ client->event_priority);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timeout");
+ if (r < 0)
+ return r;
+
+ return 0;