+ 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;