lib/silcclient/client_register.c

   1 /*
   2
   3   client_register.c
   4
   5   Author: Pekka Riikonen <priikone@silcnet.org>
   6
   7   Copyright (C) 2006 - 2007 Pekka Riikonen
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; version 2 of the License.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18 */
  19
  20 #include "silc.h"
  21 #include "silcclient.h"
  22 #include "client_internal.h"
  23
  24 /************************** Types and definitions ***************************/
  25
  26 /* Resume session context */
  27 typedef struct {
  28   SilcClient client;
  29   SilcClientConnection conn;
  30   SilcBufferStruct detach;
  31   char *nickname;
  32   SilcUInt32 channel_count;
  33 } *SilcClientResumeSession;
  34
  35 /************************ Static utility functions **************************/
  36
  37 /* Command callback.  Nothing interesting to do here. */
  38
  39 static SilcBool
  40 silc_client_register_command_called(SilcClient client,
  41                                     SilcClientConnection conn,
  42                                     SilcCommand command,
  43                                     SilcStatus status,
  44                                     SilcStatus error,
  45                                     void *context,
  46                                     va_list ap)
  47 {
  48   return FALSE;
  49 }
  50
  51 /* Continues resuming after resolving.  Continue after last reply. */
  52
  53 static SilcBool
  54 silc_client_resume_continue(SilcClient client,
  55                             SilcClientConnection conn,
  56                             SilcCommand command,
  57                             SilcStatus status,
  58                             SilcStatus error,
  59                             void *context,
  60                             va_list ap)
  61 {
  62   if (status == SILC_STATUS_OK || status == SILC_STATUS_LIST_END ||
  63       SILC_STATUS_IS_ERROR(status)) {
  64     silc_fsm_continue(&conn->internal->event_thread);
  65     return FALSE;
  66   }
  67
  68   return TRUE;
  69 }
  70
  71 /* Function used to call command replies back to application in resuming. */
  72
  73 static void
  74 silc_client_resume_command_callback(SilcClient client,
  75                                     SilcClientConnection conn,
  76                                     SilcCommand command, ...)
  77 {
  78   va_list ap;
  79   va_start(ap, command);
  80   client->internal->ops->command_reply(client, conn, command,
  81                                        SILC_STATUS_OK, SILC_STATUS_OK, ap);
  82   va_end(ap);
  83 }
  84
  85
  86 /****************************** NEW_ID packet *******************************/
  87
  88 /* Received new ID packet from server during registering to SILC network */
  89
  90 SILC_FSM_STATE(silc_client_new_id)
  91 {
  92   SilcClientConnection conn = fsm_context;
  93   SilcClient client = conn->client;
  94   SilcPacket packet = state_context;
  95   SilcID id;
  96
  97   if (conn->local_id)
  98     goto out;
  99
 100   SILC_LOG_DEBUG(("New ID received from server"));
 101
 102   if (!silc_id_payload_parse_id(silc_buffer_data(&packet->buffer),
 103                                 silc_buffer_len(&packet->buffer), &id))
 104     goto out;
 105
 106   SILC_LOG_DEBUG(("New ID %s", silc_id_render(&id.u.client_id,
 107                                               SILC_ID_CLIENT)));
 108
 109   /* Create local client entry */
 110   conn->local_entry = silc_client_add_client(client, conn,
 111                                              client->username,
 112                                              client->username,
 113                                              client->realname,
 114                                              &id.u.client_id, 0);
 115   if (!conn->local_entry)
 116     goto out;
 117
 118   /* Save the ID.  Take reference to conn->local_id. */
 119   conn->local_id = &conn->local_entry->id;
 120   conn->internal->local_idp = silc_buffer_copy(&packet->buffer);
 121
 122   /* Save remote ID */
 123   if (packet->src_id_len) {
 124     conn->internal->remote_idp =
 125       silc_id_payload_encode_data(packet->src_id,
 126                                   packet->src_id_len,
 127                                   packet->src_id_type);
 128     if (!conn->internal->remote_idp)
 129       goto out;
 130     silc_id_payload_parse_id(silc_buffer_data(conn->internal->remote_idp),
 131                              silc_buffer_len(conn->internal->remote_idp),
 132                              &conn->remote_id);
 133   }
 134
 135   /* Set IDs to the packet stream */
 136   silc_packet_set_ids(conn->stream, SILC_ID_CLIENT, conn->local_id,
 137                       conn->remote_id.type, SILC_ID_GET_ID(conn->remote_id));
 138
 139   /* Signal connection that new ID was received so it can continue
 140      with the registering. */
 141   if (conn->internal->registering)
 142     silc_fsm_continue_sync(&conn->internal->event_thread);
 143
 144  out:
 145   /** Packet processed */
 146   silc_packet_free(packet);
 147   return SILC_FSM_FINISH;
 148 }
 149
 150
 151 /************************ Register to SILC network **************************/
 152
 153 /* Register to network */
 154
 155 SILC_FSM_STATE(silc_client_st_register)
 156 {
 157   SilcClientConnection conn = fsm_context;
 158   SilcClient client = conn->client;
 159   char *nick = NULL;
 160
 161   SILC_LOG_DEBUG(("Register to network"));
 162
 163   /* From SILC protocol version 1.3, nickname is in NEW_CLIENT packet */
 164   if (conn->internal->remote_version >= 13)
 165     nick = (conn->internal->params.nickname ?
 166             conn->internal->params.nickname : client->username);
 167
 168   /* Send NEW_CLIENT packet to register to network */
 169   if (!silc_packet_send_va(conn->stream, SILC_PACKET_NEW_CLIENT, 0,
 170                            SILC_STR_UI_SHORT(strlen(client->username)),
 171                            SILC_STR_DATA(client->username,
 172                                          strlen(client->username)),
 173                            SILC_STR_UI_SHORT(strlen(client->realname)),
 174                            SILC_STR_DATA(client->realname,
 175                                          strlen(client->realname)),
 176                            SILC_STR_UI_SHORT(nick ? strlen(nick) : 0),
 177                            SILC_STR_DATA(nick, nick ? strlen(nick) : 0),
 178                            SILC_STR_END)) {
 179     /** Error sending packet */
 180     silc_fsm_next(fsm, silc_client_st_register_error);
 181     return SILC_FSM_CONTINUE;
 182   }
 183
 184   /** Wait for new ID */
 185   conn->internal->registering = TRUE;
 186   silc_fsm_next_later(fsm, silc_client_st_register_complete,
 187                       conn->internal->retry_timer, 0);
 188   return SILC_FSM_WAIT;
 189 }
 190
 191 /* Wait for NEW_ID packet to arrive */
 192
 193 SILC_FSM_STATE(silc_client_st_register_complete)
 194 {
 195   SilcClientConnection conn = fsm_context;
 196   SilcClient client = conn->client;
 197
 198   if (conn->internal->disconnected) {
 199     /** Disconnected */
 200     silc_fsm_next(fsm, silc_client_st_register_error);
 201     return SILC_FSM_CONTINUE;
 202   }
 203
 204   if (!conn->local_id) {
 205     if (conn->internal->retry_count++ >= SILC_CLIENT_RETRY_COUNT) {
 206       /** Timeout, ID not received */
 207       conn->internal->registering = FALSE;
 208       conn->internal->retry_count = 0;
 209       conn->internal->retry_timer = SILC_CLIENT_RETRY_MIN;
 210       silc_fsm_next(fsm, silc_client_st_register_error);
 211       return SILC_FSM_CONTINUE;
 212     }
 213
 214     /** Resend registering packet */
 215     silc_fsm_next(fsm, silc_client_st_register);
 216     conn->internal->retry_timer = ((conn->internal->retry_timer *
 217                                     SILC_CLIENT_RETRY_MUL) +
 218                                    (silc_rng_get_rn16(client->rng) %
 219                                     SILC_CLIENT_RETRY_RAND));
 220     return SILC_FSM_CONTINUE;
 221   }
 222
 223   SILC_LOG_DEBUG(("Registered to network"));
 224
 225   /* Issue IDENTIFY command for itself to get resolved hostname
 226      correctly from server. */
 227   silc_client_command_send(client, conn, SILC_COMMAND_IDENTIFY,
 228                            silc_client_register_command_called, NULL,
 229                            1, 5, silc_buffer_data(conn->internal->local_idp),
 230                            silc_buffer_len(conn->internal->local_idp));
 231
 232   /* With SILC protocol version 1.2 call NICK command if the nickname was
 233      set by the application. */
 234   if (conn->internal->params.nickname && conn->internal->remote_version < 13 &&
 235       !silc_utf8_strcasecmp(conn->internal->params.nickname, client->username))
 236     silc_client_command_call(client, conn, NULL,
 237                              "NICK", conn->internal->params.nickname, NULL);
 238
 239   /* Issue INFO command to fetch the real server name and server
 240      information and other stuff. */
 241   silc_client_command_send(client, conn, SILC_COMMAND_INFO,
 242                            silc_client_register_command_called, NULL,
 243                            1, 2, silc_buffer_data(conn->internal->remote_idp),
 244                            silc_buffer_len(conn->internal->remote_idp));
 245
 246   /* Call connection callback.  We are now inside SILC network. */
 247   conn->callback(client, conn, SILC_CLIENT_CONN_SUCCESS, 0, NULL,
 248                  conn->callback_context);
 249
 250   conn->internal->registering = FALSE;
 251   silc_schedule_task_del_by_all(conn->internal->schedule, 0,
 252                                 silc_client_connect_timeout, conn);
 253
 254   return SILC_FSM_FINISH;
 255 }
 256
 257 /* Error registering to network */
 258
 259 SILC_FSM_STATE(silc_client_st_register_error)
 260 {
 261   SilcClientConnection conn = fsm_context;
 262
 263   SILC_LOG_DEBUG(("Error registering to network"));
 264
 265   /* Signal to close connection */
 266   conn->internal->status = SILC_CLIENT_CONN_ERROR;
 267   if (!conn->internal->disconnected) {
 268     conn->internal->disconnected = TRUE;
 269     SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
 270   }
 271
 272   silc_schedule_task_del_by_all(conn->internal->schedule, 0,
 273                                 silc_client_connect_timeout, conn);
 274
 275   return SILC_FSM_FINISH;
 276 }
 277
 278 /************************* Resume detached session **************************/
 279
 280 /* Resume detached session */
 281
 282 SILC_FSM_STATE(silc_client_st_resume)
 283 {
 284   SilcClientConnection conn = fsm_context;
 285   SilcClient client = conn->client;
 286   SilcClientResumeSession resume;
 287   SilcBuffer auth;
 288   unsigned char *id;
 289   SilcUInt16 id_len;
 290   SilcClientID client_id;
 291   int ret;
 292
 293   SILC_LOG_DEBUG(("Resuming detached session"));
 294
 295   resume = silc_calloc(1, sizeof(*resume));
 296   if (!resume) {
 297     /** Out of memory */
 298     silc_fsm_next(fsm, silc_client_st_resume_error);
 299     return SILC_FSM_CONTINUE;
 300   }
 301   silc_fsm_set_state_context(fsm, resume);
 302
 303   silc_buffer_set(&resume->detach, conn->internal->params.detach_data,
 304                   conn->internal->params.detach_data_len);
 305   SILC_LOG_HEXDUMP(("Detach data"), silc_buffer_data(&resume->detach),
 306                    silc_buffer_len(&resume->detach));
 307
 308   /* Take the old client ID from the detachment data */
 309   ret = silc_buffer_unformat(&resume->detach,
 310                              SILC_STR_ADVANCE,
 311                              SILC_STR_UI16_NSTRING_ALLOC(&resume->nickname,
 312                                                          NULL),
 313                              SILC_STR_UI16_NSTRING(&id, &id_len),
 314                              SILC_STR_UI_INT(NULL),
 315                              SILC_STR_UI_INT(&resume->channel_count),
 316                              SILC_STR_END);
 317   if (ret < 0) {
 318     /** Malformed detach data */
 319     SILC_LOG_DEBUG(("Malformed detachment data"));
 320     silc_fsm_next(fsm, silc_client_st_resume_error);
 321     return SILC_FSM_CONTINUE;
 322   }
 323
 324   if (!silc_id_str2id(id, id_len, SILC_ID_CLIENT, &client_id,
 325                       sizeof(client_id))) {
 326     /** Malformed ID */
 327     SILC_LOG_DEBUG(("Malformed ID"));
 328     silc_fsm_next(fsm, silc_client_st_resume_error);
 329     return SILC_FSM_CONTINUE;
 330   }
 331
 332   /* Generate authentication data that server will verify */
 333   auth = silc_auth_public_key_auth_generate(conn->public_key,
 334                                             conn->private_key,
 335                                             client->rng,
 336                                             conn->internal->hash,
 337                                             &client_id, SILC_ID_CLIENT);
 338   if (!auth) {
 339     /** Out of memory */
 340     silc_fsm_next(fsm, silc_client_st_resume_error);
 341     return SILC_FSM_CONTINUE;
 342   }
 343
 344   /* Send RESUME_CLIENT packet to resume to network */
 345   if (!silc_packet_send_va(conn->stream, SILC_PACKET_RESUME_CLIENT, 0,
 346                            SILC_STR_UI_SHORT(id_len),
 347                            SILC_STR_DATA(id, id_len),
 348                            SILC_STR_DATA(silc_buffer_data(auth),
 349                                          silc_buffer_len(auth)),
 350                            SILC_STR_END)) {
 351     /** Error sending packet */
 352     SILC_LOG_DEBUG(("Error sending packet"));
 353     silc_fsm_next(fsm, silc_client_st_resume_error);
 354     return SILC_FSM_CONTINUE;
 355   }
 356
 357   /** Wait for new ID */
 358   conn->internal->registering = TRUE;
 359   silc_fsm_next_later(fsm, silc_client_st_resume_resolve_channels, 15, 0);
 360   return SILC_FSM_WAIT;
 361 }
 362
 363 /* Resolve the old session information, user mode and joined channels. */
 364
 365 SILC_FSM_STATE(silc_client_st_resume_resolve_channels)
 366 {
 367   SilcClientConnection conn = fsm_context;
 368   SilcClient client = conn->client;
 369   SilcClientResumeSession resume = state_context;
 370   SilcUInt32 *res_argv_lens = NULL, *res_argv_types = NULL, res_argc = 0;
 371   unsigned char **res_argv = NULL;
 372   int i;
 373
 374   if (conn->internal->disconnected) {
 375     /** Disconnected */
 376     silc_fsm_next(fsm, silc_client_st_resume_error);
 377     return SILC_FSM_CONTINUE;
 378   }
 379
 380   if (!conn->local_id) {
 381     /** Timeout, ID not received */
 382     conn->internal->registering = FALSE;
 383     silc_fsm_next(fsm, silc_client_st_resume_error);
 384     return SILC_FSM_CONTINUE;
 385   }
 386
 387   /** Wait for channels */
 388   silc_fsm_next(fsm, silc_client_st_resume_resolve_cmodes);
 389
 390   /* Change our nickname */
 391   silc_client_change_nickname(client, conn, conn->local_entry,
 392                               resume->nickname, NULL, NULL, 0);
 393
 394   /* Send UMODE command to get our own user mode in the network */
 395   SILC_LOG_DEBUG(("Resolving user mode"));
 396   silc_client_command_send(client, conn, SILC_COMMAND_UMODE,
 397                            silc_client_register_command_called, NULL,
 398                            1, 1, silc_buffer_data(conn->internal->local_idp),
 399                            silc_buffer_len(conn->internal->local_idp));
 400
 401   if (!resume->channel_count)
 402     return SILC_FSM_YIELD;
 403
 404   /* Send IDENTIFY command for all channels we know about.  These are the
 405      channels we've joined to according our detachment data. */
 406   for (i = 0; i < resume->channel_count; i++) {
 407     SilcChannelEntry channel;
 408     unsigned char *chid;
 409     SilcUInt16 chid_len;
 410     SilcBuffer idp;
 411     SilcChannelID channel_id;
 412     char *name;
 413
 414     if (silc_buffer_unformat(&resume->detach,
 415                              SILC_STR_ADVANCE,
 416                              SILC_STR_UI16_NSTRING(&name, NULL),
 417                              SILC_STR_UI16_NSTRING(&chid, &chid_len),
 418                              SILC_STR_UI_INT(NULL),
 419                              SILC_STR_END) < 0)
 420       continue;
 421
 422     if (!silc_id_str2id(chid, chid_len, SILC_ID_CHANNEL, &channel_id,
 423                         sizeof(channel_id)))
 424       continue;
 425     idp = silc_id_payload_encode_data(chid, chid_len, SILC_ID_CHANNEL);
 426     if (!idp)
 427       continue;
 428
 429     /* Add the channel to cache */
 430     channel = silc_client_get_channel_by_id(client, conn, &channel_id);
 431     if (!channel)
 432       silc_client_add_channel(client, conn, name, 0, &channel_id);
 433
 434     res_argv = silc_realloc(res_argv, sizeof(*res_argv) * (res_argc + 1));
 435     res_argv_lens = silc_realloc(res_argv_lens, sizeof(*res_argv_lens) *
 436                                  (res_argc + 1));
 437     res_argv_types = silc_realloc(res_argv_types, sizeof(*res_argv_types) *
 438                                   (res_argc + 1));
 439     res_argv[res_argc] = silc_buffer_steal(idp, &res_argv_lens[res_argc]);
 440     res_argv_types[res_argc] = res_argc + 5;
 441     res_argc++;
 442     silc_buffer_free(idp);
 443   }
 444
 445   /* Send IDENTIFY command */
 446   SILC_LOG_DEBUG(("Resolving joined channels"));
 447   silc_client_command_send_argv(client, conn, SILC_COMMAND_IDENTIFY,
 448                                 silc_client_resume_continue, conn,
 449                                 res_argc, res_argv, res_argv_lens,
 450                                 res_argv_types);
 451
 452   for (i = 0; i < resume->channel_count; i++)
 453     silc_free(res_argv[i]);
 454   silc_free(res_argv);
 455   silc_free(res_argv_lens);
 456   silc_free(res_argv_types);
 457
 458   return SILC_FSM_WAIT;
 459 }
 460
 461 /* Resolve joined channel modes, users and topics. */
 462
 463 SILC_FSM_STATE(silc_client_st_resume_resolve_cmodes)
 464 {
 465   SilcClientConnection conn = fsm_context;
 466   SilcClient client = conn->client;
 467   SilcClientResumeSession resume = state_context;
 468   SilcIDCacheEntry entry;
 469   SilcChannelEntry channel;
 470   SilcList channels;
 471   SilcBuffer idp;
 472
 473   if (conn->internal->disconnected) {
 474     /** Disconnected */
 475     silc_fsm_next(fsm, silc_client_st_resume_error);
 476     return SILC_FSM_CONTINUE;
 477   }
 478
 479   SILC_LOG_DEBUG(("Resolving channel details"));
 480
 481   /** Wait for channel modes */
 482   silc_fsm_next(fsm, silc_client_st_resume_completed);
 483
 484   if (!silc_idcache_get_all(conn->internal->channel_cache, &channels))
 485     return SILC_FSM_YIELD;
 486
 487   /* Resolve channels' mode, users and topic */
 488   resume->channel_count = silc_list_count(channels) * 3;
 489   silc_list_start(channels);
 490   while ((entry = silc_list_get(channels))) {
 491     channel = entry->context;
 492     idp = silc_id_payload_encode(&channel->id, SILC_ID_CHANNEL);
 493     if (!idp)
 494       continue;
 495
 496     silc_client_command_send(client, conn, SILC_COMMAND_CMODE,
 497                              silc_client_resume_continue, conn, 1,
 498                              1, silc_buffer_data(idp),
 499                              silc_buffer_len(idp));
 500     silc_client_command_send(client, conn, SILC_COMMAND_USERS,
 501                              silc_client_resume_continue, conn, 1,
 502                              1, silc_buffer_data(idp),
 503                              silc_buffer_len(idp));
 504     silc_client_command_send(client, conn, SILC_COMMAND_TOPIC,
 505                              silc_client_resume_continue, conn, 1,
 506                              1, silc_buffer_data(idp),
 507                              silc_buffer_len(idp));
 508     silc_buffer_free(idp);
 509   }
 510
 511   return SILC_FSM_WAIT;
 512 }
 513
 514 /* Resuming completed */
 515
 516 SILC_FSM_STATE(silc_client_st_resume_completed)
 517 {
 518   SilcClientConnection conn = fsm_context;
 519   SilcClient client = conn->client;
 520   SilcClientResumeSession resume = state_context;
 521   SilcIDCacheEntry entry;
 522   SilcChannelEntry channel;
 523   SilcList channels;
 524
 525   if (conn->internal->disconnected) {
 526     /** Disconnected */
 527     silc_fsm_next(fsm, silc_client_st_resume_error);
 528     return SILC_FSM_CONTINUE;
 529   }
 530
 531   if (resume->channel_count > 0) {
 532     resume->channel_count--;
 533     if (resume->channel_count)
 534       return SILC_FSM_WAIT;
 535   }
 536
 537   SILC_LOG_DEBUG(("Resuming completed"));
 538
 539   /* Issue IDENTIFY command for itself to get resolved hostname
 540      correctly from server. */
 541   silc_client_command_send(client, conn, SILC_COMMAND_IDENTIFY,
 542                            silc_client_register_command_called, NULL,
 543                            1, 5, silc_buffer_data(conn->internal->local_idp),
 544                            silc_buffer_len(conn->internal->local_idp));
 545
 546   /* Issue INFO command to fetch the real server name and server
 547      information and other stuff. */
 548   silc_client_command_send(client, conn, SILC_COMMAND_INFO,
 549                            silc_client_register_command_called, NULL,
 550                            1, 2, silc_buffer_data(conn->internal->remote_idp),
 551                            silc_buffer_len(conn->internal->remote_idp));
 552
 553   /* Call connection callback.  We have now resumed to SILC network. */
 554   conn->callback(client, conn, SILC_CLIENT_CONN_SUCCESS_RESUME, 0, NULL,
 555                  conn->callback_context);
 556
 557   /* Call UMODE command reply. */
 558   if (conn->local_entry->mode)
 559     silc_client_resume_command_callback(client, conn, SILC_COMMAND_UMODE,
 560                                         conn->local_entry->mode);
 561
 562   /* Call NICK command reply. */
 563   silc_client_resume_command_callback(client, conn, SILC_COMMAND_NICK,
 564                                       conn->local_entry,
 565                                       conn->local_entry->nickname,
 566                                       &conn->local_entry->id);
 567
 568   /* Call JOIN command replies for all joined channel */
 569   silc_idcache_get_all(conn->internal->channel_cache, &channels);
 570   silc_list_start(channels);
 571   while ((entry = silc_list_get(channels))) {
 572     SilcHashTableList htl;
 573     const char *cipher, *hmac;
 574
 575     channel = entry->context;
 576     cipher = (channel->internal.send_key ?
 577               silc_cipher_get_name(channel->internal.send_key) : NULL);
 578     hmac = (channel->internal.hmac ?
 579             silc_hmac_get_name(channel->internal.hmac) : NULL);
 580     silc_hash_table_list(channel->user_list, &htl);
 581     silc_client_resume_command_callback(client, conn, SILC_COMMAND_JOIN,
 582                                         channel->channel_name, channel,
 583                                         channel->mode, &htl, channel->topic,
 584                                         cipher, hmac, channel->founder_key,
 585                                         channel->channel_pubkeys,
 586                                         channel->user_limit);
 587     silc_hash_table_list_reset(&htl);
 588   }
 589
 590   conn->internal->registering = FALSE;
 591   silc_schedule_task_del_by_all(conn->internal->schedule, 0,
 592                                 silc_client_connect_timeout, conn);
 593   silc_free(resume->nickname);
 594   silc_free(resume);
 595
 596   return SILC_FSM_FINISH;
 597 }
 598
 599 /* Error resuming to network */
 600
 601 SILC_FSM_STATE(silc_client_st_resume_error)
 602 {
 603   SilcClientConnection conn = fsm_context;
 604   SilcClientResumeSession resume = state_context;
 605
 606   if (conn->internal->disconnected) {
 607     if (resume) {
 608       silc_free(resume->nickname);
 609       silc_free(resume);
 610     }
 611     return SILC_FSM_FINISH;
 612   }
 613
 614   SILC_LOG_DEBUG(("Error resuming to network"));
 615
 616   /* Signal to close connection */
 617   conn->internal->status = SILC_CLIENT_CONN_ERROR;
 618   if (!conn->internal->disconnected) {
 619     conn->internal->disconnected = TRUE;
 620     SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
 621   }
 622
 623   silc_schedule_task_del_by_all(conn->internal->schedule, 0,
 624                                 silc_client_connect_timeout, conn);
 625
 626   if (resume) {
 627     silc_free(resume->nickname);
 628     silc_free(resume);
 629   }
 630
 631   return SILC_FSM_FINISH;
 632 }
 633
 634 /* Generates the session detachment data. This data can be used later
 635    to resume back to the server. */
 636
 637 SilcBuffer silc_client_get_detach_data(SilcClient client,
 638                                        SilcClientConnection conn)
 639 {
 640   SilcBuffer detach;
 641   SilcHashTableList htl;
 642   SilcChannelUser chu;
 643   unsigned char id[64];
 644   SilcUInt32 id_len;
 645   int ret, ch_count;
 646
 647   SILC_LOG_DEBUG(("Creating detachment data"));
 648
 649   ch_count = silc_hash_table_count(conn->local_entry->channels);
 650   silc_id_id2str(conn->local_id, SILC_ID_CLIENT, id, sizeof(id), &id_len);
 651
 652   /* Save the nickname, Client ID and user mode in SILC network */
 653   detach = silc_buffer_alloc(0);
 654   if (!detach)
 655     return NULL;
 656   ret =
 657     silc_buffer_format(detach,
 658                        SILC_STR_ADVANCE,
 659                        SILC_STR_UI_SHORT(strlen(conn->local_entry->nickname)),
 660                        SILC_STR_DATA(conn->local_entry->nickname,
 661                                      strlen(conn->local_entry->nickname)),
 662                        SILC_STR_UI_SHORT(id_len),
 663                        SILC_STR_DATA(id, id_len),
 664                        SILC_STR_UI_INT(conn->local_entry->mode),
 665                        SILC_STR_UI_INT(ch_count),
 666                        SILC_STR_END);
 667   if (ret < 0) {
 668     silc_buffer_free(detach);
 669     return NULL;
 670   }
 671
 672   /* Save all joined channels */
 673   silc_hash_table_list(conn->local_entry->channels, &htl);
 674   while (silc_hash_table_get(&htl, NULL, (void *)&chu)) {
 675     unsigned char chid[32];
 676     SilcUInt32 chid_len;
 677
 678     silc_id_id2str(&chu->channel->id, SILC_ID_CHANNEL, chid, sizeof(chid),
 679                    &chid_len);
 680     silc_buffer_format(detach,
 681                        SILC_STR_ADVANCE,
 682                        SILC_STR_UI_SHORT(strlen(chu->channel->channel_name)),
 683                        SILC_STR_DATA(chu->channel->channel_name,
 684                                      strlen(chu->channel->channel_name)),
 685                        SILC_STR_UI_SHORT(chid_len),
 686                        SILC_STR_DATA(chid, chid_len),
 687                        SILC_STR_UI_INT(chu->channel->mode),
 688                        SILC_STR_END);
 689   }
 690   silc_hash_table_list_reset(&htl);
 691
 692   silc_buffer_start(detach);
 693   SILC_LOG_HEXDUMP(("Detach data"), silc_buffer_data(detach),
 694                    silc_buffer_len(detach));
 695
 696   return detach;
 697 }