lib/silcclient/command_reply.c

   1 /*
   2
   3   command_reply.c
   4
   5   Author: Pekka Riikonen <priikone@silcnet.org>
   6
   7   Copyright (C) 1997 - 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 /* $Id$ */
  20
  21 #include "silc.h"
  22 #include "silcclient.h"
  23 #include "client_internal.h"
  24
  25 /************************** Types and definitions ***************************/
  26
  27 /* Calls error command reply callback back to command sender. */
  28 #define ERROR_CALLBACK(err)                                     \
  29 do {                                                            \
  30   void *arg1 = NULL, *arg2 = NULL;                              \
  31   if (cmd->status != SILC_STATUS_OK)                            \
  32     silc_status_get_args(cmd->status, args, &arg1, &arg2);      \
  33   else                                                          \
  34     cmd->status = cmd->error = err;                             \
  35   SILC_LOG_DEBUG(("Error in command reply: %s",                 \
  36                  silc_get_status_message(cmd->status)));        \
  37   silc_client_command_callback(cmd, arg1, arg2);                \
  38 } while(0)
  39
  40 /* Check for error */
  41 #define CHECK_STATUS(msg)                                               \
  42   SILC_LOG_DEBUG(("%s", silc_get_command_name(cmd->cmd)));              \
  43   if (cmd->error != SILC_STATUS_OK) {                                   \
  44     if (cmd->verbose)                                                   \
  45       SAY(cmd->conn->client, cmd->conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR, \
  46           msg "%s", silc_get_status_message(cmd->error));               \
  47     ERROR_CALLBACK(cmd->error);                                         \
  48     silc_client_command_process_error(cmd, state_context, cmd->error);  \
  49     silc_fsm_next(fsm, silc_client_command_reply_processed);            \
  50     return SILC_FSM_CONTINUE;                                           \
  51   }
  52
  53 /* Check for correct arguments */
  54 #define CHECK_ARGS(min, max)                                    \
  55   if (silc_argument_get_arg_num(args) < min ||                  \
  56       silc_argument_get_arg_num(args) > max) {                  \
  57     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);          \
  58     silc_fsm_next(fsm, silc_client_command_reply_processed);    \
  59     return SILC_FSM_CONTINUE;                                   \
  60   }
  61
  62 #define SAY cmd->conn->client->internal->ops->say
  63
  64 /************************ Static utility functions **************************/
  65
  66 /* Delivers the command reply back to application */
  67
  68 static inline void
  69 silc_client_command_callback(SilcClientCommandContext cmd, ...)
  70 {
  71   SilcClientCommandReplyCallback cb;
  72   SilcList list;
  73   va_list ap, cp;
  74
  75   va_start(ap, cmd);
  76
  77   /* Default reply callback */
  78   if (cmd->called) {
  79     silc_va_copy(cp, ap);
  80     cmd->conn->client->internal->ops->command_reply(
  81                        cmd->conn->client, cmd->conn, cmd->cmd, cmd->status,
  82                        cmd->error, cp);
  83     va_end(cp);
  84   }
  85
  86   /* Reply callback */
  87   list = cmd->reply_callbacks;
  88   silc_list_start(list);
  89   while ((cb = silc_list_get(list)))
  90     if (!cb->do_not_call) {
  91       silc_va_copy(cp, ap);
  92       cb->do_not_call = !cb->reply(cmd->conn->client, cmd->conn, cmd->cmd,
  93                                    cmd->status, cmd->error, cb->context, cp);
  94       va_end(cp);
  95     }
  96
  97   va_end(ap);
  98 }
  99
 100 /* Handles common error status types. */
 101
 102 static void silc_client_command_process_error(SilcClientCommandContext cmd,
 103                                               SilcCommandPayload payload,
 104                                               SilcStatus error)
 105 {
 106   SilcClient client = cmd->conn->client;
 107   SilcClientConnection conn = cmd->conn;
 108   SilcArgumentPayload args = silc_command_get_args(payload);
 109   SilcID id;
 110
 111   if (cmd->error == SILC_STATUS_ERR_NO_SUCH_CLIENT_ID) {
 112     SilcClientEntry client_entry;
 113
 114     /* Remove unknown client entry from cache */
 115     if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
 116       return;
 117
 118     client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 119     if (client_entry) {
 120       silc_client_remove_from_channels(client, conn, client_entry);
 121       silc_client_del_client(client, conn, client_entry);
 122       silc_client_unref_client(client, conn, client_entry);
 123     }
 124     return;
 125   }
 126
 127   if (cmd->error == SILC_STATUS_ERR_NO_SUCH_CHANNEL_ID) {
 128     SilcChannelEntry channel;
 129
 130     /* Remove unknown channel entry from cache */
 131     if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
 132       return;
 133
 134     channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
 135     if (channel) {
 136       silc_client_empty_channel(client, conn, channel);
 137       silc_client_del_channel(client, conn, channel);
 138       silc_client_unref_channel(client, conn, channel);
 139     }
 140     return;
 141   }
 142
 143   if (cmd->error == SILC_STATUS_ERR_NO_SUCH_SERVER_ID) {
 144     SilcServerEntry server_entry;
 145
 146     /* Remove unknown server entry from cache */
 147     if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
 148       return;
 149
 150     server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
 151     if (server_entry) {
 152       silc_client_del_server(client, conn, server_entry);
 153       silc_client_unref_server(client, conn, server_entry);
 154     }
 155     return;
 156   }
 157 }
 158
 159 /***************************** Command Reply ********************************/
 160
 161 /* Process received command reply packet */
 162
 163 SILC_FSM_STATE(silc_client_command_reply)
 164 {
 165   SilcClientConnection conn = fsm_context;
 166   SilcPacket packet = state_context;
 167   SilcClientCommandContext cmd;
 168   SilcCommandPayload payload;
 169   SilcCommand command;
 170   SilcUInt16 cmd_ident;
 171
 172   /* Get command reply payload from packet */
 173   payload = silc_command_payload_parse(silc_buffer_datalen(&packet->buffer));
 174   silc_packet_free(packet);
 175   if (!payload) {
 176     SILC_LOG_DEBUG(("Bad command reply packet"));
 177     return SILC_FSM_FINISH;
 178   }
 179
 180   cmd_ident = silc_command_get_ident(payload);
 181   command = silc_command_get(payload);
 182
 183   /* Find the command pending reply */
 184   silc_mutex_lock(conn->internal->lock);
 185   silc_list_start(conn->internal->pending_commands);
 186   while ((cmd = silc_list_get(conn->internal->pending_commands))) {
 187     if ((cmd->cmd == command || cmd->cmd == SILC_COMMAND_NONE)
 188         && cmd->cmd_ident == cmd_ident) {
 189       silc_list_del(conn->internal->pending_commands, cmd);
 190       break;
 191     }
 192   }
 193   silc_mutex_unlock(conn->internal->lock);
 194
 195   if (!cmd) {
 196     SILC_LOG_DEBUG(("Unknown command reply %s, ident %d",
 197                     silc_get_command_name(command), cmd_ident));
 198     silc_command_payload_free(payload);
 199     return SILC_FSM_FINISH;
 200   }
 201
 202   /* Signal command thread that command reply has arrived.  We continue
 203      command reply processing synchronously because we save the command
 204      payload into state context.  No other reply may arrive to this command
 205      while we're processing this reply. */
 206   silc_fsm_set_state_context(&cmd->thread, payload);
 207   silc_fsm_next(&cmd->thread, silc_client_command_reply_process);
 208   silc_fsm_continue_sync(&cmd->thread);
 209
 210   return SILC_FSM_FINISH;
 211 }
 212
 213 /* Wait here for command reply to arrive from remote host */
 214
 215 SILC_FSM_STATE(silc_client_command_reply_wait)
 216 {
 217   SilcClientCommandContext cmd = fsm_context;
 218
 219   SILC_LOG_DEBUG(("Wait for command reply"));
 220
 221   /** Wait for command reply */
 222   silc_fsm_set_state_context(fsm, NULL);
 223   silc_fsm_next_later(fsm, silc_client_command_reply_timeout,
 224                       cmd->cmd != SILC_COMMAND_PING ? 40 : 60, 0);
 225   return SILC_FSM_WAIT;
 226 }
 227
 228 /* Timeout occurred while waiting command reply */
 229
 230 SILC_FSM_STATE(silc_client_command_reply_timeout)
 231 {
 232   SilcClientCommandContext cmd = fsm_context;
 233   SilcClientConnection conn = cmd->conn;
 234   SilcArgumentPayload args = NULL;
 235
 236   if (conn->internal->disconnected) {
 237     SILC_LOG_DEBUG(("Command %s canceled", silc_get_command_name(cmd->cmd)));
 238     silc_list_del(conn->internal->pending_commands, cmd);
 239     if (!cmd->called)
 240       ERROR_CALLBACK(SILC_STATUS_ERR_TIMEDOUT);
 241     return SILC_FSM_FINISH;
 242   }
 243
 244   SILC_LOG_DEBUG(("Command %s timeout", silc_get_command_name(cmd->cmd)));
 245
 246   /* Timeout, reply not received in timely fashion */
 247   silc_list_del(conn->internal->pending_commands, cmd);
 248   ERROR_CALLBACK(SILC_STATUS_ERR_TIMEDOUT);
 249   return SILC_FSM_FINISH;
 250 }
 251
 252 /* Process received command reply payload */
 253
 254 SILC_FSM_STATE(silc_client_command_reply_process)
 255 {
 256   SilcClientCommandContext cmd = fsm_context;
 257   SilcCommandPayload payload = state_context;
 258
 259   silc_command_get_status(payload, &cmd->status, &cmd->error);
 260
 261   switch (cmd->cmd) {
 262   case SILC_COMMAND_WHOIS:
 263     /** WHOIS */
 264     silc_fsm_next(fsm, silc_client_command_reply_whois);
 265     break;
 266   case SILC_COMMAND_WHOWAS:
 267     /** WHOWAS */
 268     silc_fsm_next(fsm, silc_client_command_reply_whowas);
 269     break;
 270   case SILC_COMMAND_IDENTIFY:
 271     /** IDENTIFY */
 272     silc_fsm_next(fsm, silc_client_command_reply_identify);
 273     break;
 274   case SILC_COMMAND_NICK:
 275     /** NICK */
 276     silc_fsm_next(fsm, silc_client_command_reply_nick);
 277     break;
 278   case SILC_COMMAND_LIST:
 279     /** LIST */
 280     silc_fsm_next(fsm, silc_client_command_reply_list);
 281     break;
 282   case SILC_COMMAND_TOPIC:
 283     /** TOPIC */
 284     silc_fsm_next(fsm, silc_client_command_reply_topic);
 285     break;
 286   case SILC_COMMAND_INVITE:
 287     /** INVITE */
 288     silc_fsm_next(fsm, silc_client_command_reply_invite);
 289     break;
 290   case SILC_COMMAND_QUIT:
 291     /** QUIT */
 292     silc_fsm_next(fsm, silc_client_command_reply_quit);
 293     break;
 294   case SILC_COMMAND_KILL:
 295     /** KILL */
 296     silc_fsm_next(fsm, silc_client_command_reply_kill);
 297     break;
 298   case SILC_COMMAND_INFO:
 299     /** INFO */
 300     silc_fsm_next(fsm, silc_client_command_reply_info);
 301     break;
 302   case SILC_COMMAND_STATS:
 303     /** STATS */
 304     silc_fsm_next(fsm, silc_client_command_reply_stats);
 305     break;
 306   case SILC_COMMAND_PING:
 307     /** PING */
 308     silc_fsm_next(fsm, silc_client_command_reply_ping);
 309     break;
 310   case SILC_COMMAND_OPER:
 311     /** OPER */
 312     silc_fsm_next(fsm, silc_client_command_reply_oper);
 313     break;
 314   case SILC_COMMAND_JOIN:
 315     /** JOIN */
 316     silc_fsm_next(fsm, silc_client_command_reply_join);
 317     break;
 318   case SILC_COMMAND_MOTD:
 319     /** MOTD */
 320     silc_fsm_next(fsm, silc_client_command_reply_motd);
 321     break;
 322   case SILC_COMMAND_UMODE:
 323     /** UMODE */
 324     silc_fsm_next(fsm, silc_client_command_reply_umode);
 325     break;
 326   case SILC_COMMAND_CMODE:
 327     /** CMODE */
 328     silc_fsm_next(fsm, silc_client_command_reply_cmode);
 329     break;
 330   case SILC_COMMAND_CUMODE:
 331     /** CUMODE */
 332     silc_fsm_next(fsm, silc_client_command_reply_cumode);
 333     break;
 334   case SILC_COMMAND_KICK:
 335     /** KICK */
 336     silc_fsm_next(fsm, silc_client_command_reply_kick);
 337     break;
 338   case SILC_COMMAND_BAN:
 339     /** BAN */
 340     silc_fsm_next(fsm, silc_client_command_reply_ban);
 341     break;
 342   case SILC_COMMAND_DETACH:
 343     /** DETACH */
 344     silc_fsm_next(fsm, silc_client_command_reply_detach);
 345     break;
 346   case SILC_COMMAND_WATCH:
 347     /** WATCH */
 348     silc_fsm_next(fsm, silc_client_command_reply_watch);
 349     break;
 350   case SILC_COMMAND_SILCOPER:
 351     /** SILCOPER */
 352     silc_fsm_next(fsm, silc_client_command_reply_silcoper);
 353     break;
 354   case SILC_COMMAND_LEAVE:
 355     /** LEAVE */
 356     silc_fsm_next(fsm, silc_client_command_reply_leave);
 357     break;
 358   case SILC_COMMAND_USERS:
 359     /** USERS */
 360     silc_fsm_next(fsm, silc_client_command_reply_users);
 361     break;
 362   case SILC_COMMAND_GETKEY:
 363     /** GETKEY */
 364     silc_fsm_next(fsm, silc_client_command_reply_getkey);
 365     break;
 366   case SILC_COMMAND_SERVICE:
 367     /** SERVICE */
 368     silc_fsm_next(fsm, silc_client_command_reply_service);
 369     break;
 370   default:
 371     return SILC_FSM_FINISH;
 372   }
 373
 374   return SILC_FSM_CONTINUE;
 375 }
 376
 377 /* Completes command reply processing */
 378
 379 SILC_FSM_STATE(silc_client_command_reply_processed)
 380 {
 381   SilcClientCommandContext cmd = fsm_context;
 382   SilcClientConnection conn = cmd->conn;
 383   SilcCommandPayload payload = state_context;
 384
 385   silc_command_payload_free(payload);
 386
 387   if (cmd->status == SILC_STATUS_OK || cmd->status == SILC_STATUS_LIST_END ||
 388       SILC_STATUS_IS_ERROR(cmd->status))
 389     return SILC_FSM_FINISH;
 390
 391   /* Add back to pending command reply list */
 392   silc_mutex_lock(conn->internal->lock);
 393   cmd->resolved = FALSE;
 394   silc_list_add(conn->internal->pending_commands, cmd);
 395   silc_mutex_unlock(conn->internal->lock);
 396
 397   /** Wait more command payloads */
 398   silc_fsm_next(fsm, silc_client_command_reply_wait);
 399   return SILC_FSM_CONTINUE;
 400 }
 401
 402 /******************************** WHOIS *************************************/
 403
 404 /* Received reply for WHOIS command. */
 405
 406 SILC_FSM_STATE(silc_client_command_reply_whois)
 407 {
 408   SilcClientCommandContext cmd = fsm_context;
 409   SilcClientConnection conn = cmd->conn;
 410   SilcClient client = conn->client;
 411   SilcCommandPayload payload = state_context;
 412   SilcArgumentPayload args = silc_command_get_args(payload);
 413   SilcClientEntry client_entry = NULL;
 414   SilcUInt32 idle = 0, mode = 0, fingerprint_len, len, *umodes = NULL;
 415   SilcBufferStruct channels, ch_user_modes;
 416   SilcBool has_channels = FALSE;
 417   SilcDList channel_list = NULL;
 418   SilcID id;
 419   char *nickname = NULL, *username = NULL, *realname = NULL;
 420   unsigned char *fingerprint, *tmp;
 421
 422   CHECK_STATUS("WHOIS: ");
 423   CHECK_ARGS(5, 11);
 424
 425   /* Get Client ID */
 426   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 427     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 428     goto out;
 429   }
 430
 431   /* Get names */
 432   nickname = silc_argument_get_arg_type(args, 3, NULL);
 433   username = silc_argument_get_arg_type(args, 4, NULL);
 434   realname = silc_argument_get_arg_type(args, 5, NULL);
 435   if (!nickname || !username || !realname) {
 436     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 437     goto out;
 438   }
 439
 440   /* Get joined channel list */
 441   memset(&channels, 0, sizeof(channels));
 442   tmp = silc_argument_get_arg_type(args, 6, &len);
 443   if (tmp) {
 444     has_channels = TRUE;
 445     silc_buffer_set(&channels, tmp, len);
 446
 447     /* Get channel user mode list */
 448     tmp = silc_argument_get_arg_type(args, 10, &len);
 449     if (!tmp) {
 450       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 451       goto out;
 452     }
 453     silc_buffer_set(&ch_user_modes, tmp, len);
 454   }
 455
 456   /* Get user mode */
 457   tmp = silc_argument_get_arg_type(args, 7, &len);
 458   if (tmp)
 459     SILC_GET32_MSB(mode, tmp);
 460
 461   /* Get idle time */
 462   tmp = silc_argument_get_arg_type(args, 8, &len);
 463   if (tmp)
 464     SILC_GET32_MSB(idle, tmp);
 465
 466   /* Get fingerprint */
 467   fingerprint = silc_argument_get_arg_type(args, 9, &fingerprint_len);
 468
 469   /* Check if we have this client cached already. */
 470   client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 471   if (!client_entry) {
 472     SILC_LOG_DEBUG(("Adding new client entry (WHOIS)"));
 473     client_entry =
 474       silc_client_add_client(client, conn, nickname, username, realname,
 475                              &id.u.client_id, mode);
 476     if (!client_entry) {
 477       ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
 478       goto out;
 479     }
 480     silc_client_ref_client(client, conn, client_entry);
 481   } else {
 482     silc_client_update_client(client, conn, client_entry,
 483                               nickname, username, realname, mode);
 484   }
 485
 486   silc_rwlock_wrlock(client_entry->internal.lock);
 487
 488   if (fingerprint && fingerprint_len == sizeof(client_entry->fingerprint))
 489     memcpy(client_entry->fingerprint, fingerprint, fingerprint_len);
 490
 491   /* Get user attributes */
 492   tmp = silc_argument_get_arg_type(args, 11, &len);
 493   if (tmp) {
 494     if (client_entry->attrs)
 495       silc_attribute_payload_list_free(client_entry->attrs);
 496     client_entry->attrs = silc_attribute_payload_parse(tmp, len);
 497   }
 498
 499   silc_rwlock_unlock(client_entry->internal.lock);
 500
 501   /* Parse channel and channel user mode list */
 502   if (has_channels) {
 503     channel_list = silc_channel_payload_parse_list(silc_buffer_data(&channels),
 504                                                    silc_buffer_len(&channels));
 505     if (channel_list)
 506       silc_get_mode_list(&ch_user_modes, silc_dlist_count(channel_list),
 507                          &umodes);
 508   }
 509
 510   /* Notify application */
 511   silc_client_command_callback(cmd, client_entry, nickname, username,
 512                                realname, channel_list, mode, idle, fingerprint,
 513                                umodes, client_entry->attrs);
 514
 515   silc_client_unref_client(client, conn, client_entry);
 516   if (has_channels) {
 517     silc_channel_payload_list_free(channel_list);
 518     silc_free(umodes);
 519   }
 520
 521  out:
 522   silc_fsm_next(fsm, silc_client_command_reply_processed);
 523   return SILC_FSM_CONTINUE;
 524 }
 525
 526 /******************************** WHOWAS ************************************/
 527
 528 /* Received reply for WHOWAS command. */
 529
 530 SILC_FSM_STATE(silc_client_command_reply_whowas)
 531 {
 532   SilcClientCommandContext cmd = fsm_context;
 533   SilcClientConnection conn = cmd->conn;
 534   SilcClient client = conn->client;
 535   SilcCommandPayload payload = state_context;
 536   SilcArgumentPayload args = silc_command_get_args(payload);
 537   SilcClientEntry client_entry = NULL;
 538   SilcID id;
 539   char *nickname, *username;
 540   char *realname = NULL;
 541
 542   CHECK_STATUS("WHOWAS: ");
 543   CHECK_ARGS(4, 5);
 544
 545   /* Get Client ID */
 546   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 547     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 548     goto out;
 549   }
 550
 551   /* Get the client entry */
 552   client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 553
 554   /* Get names */
 555   nickname = silc_argument_get_arg_type(args, 3, NULL);
 556   username = silc_argument_get_arg_type(args, 4, NULL);
 557   realname = silc_argument_get_arg_type(args, 5, NULL);
 558   if (!nickname || !username) {
 559     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 560     goto out;
 561   }
 562
 563   /* Notify application. We don't save any history information to any
 564      cache. Just pass the data to the application. */
 565   silc_client_command_callback(cmd, client_entry, nickname, username,
 566                                realname);
 567
 568  out:
 569   silc_client_unref_client(client, conn, client_entry);
 570   silc_fsm_next(fsm, silc_client_command_reply_processed);
 571   return SILC_FSM_CONTINUE;
 572 }
 573
 574 /******************************** IDENTIFY **********************************/
 575
 576 /* Received reply for IDENTIFY command. */
 577
 578 SILC_FSM_STATE(silc_client_command_reply_identify)
 579 {
 580   SilcClientCommandContext cmd = fsm_context;
 581   SilcClientConnection conn = cmd->conn;
 582   SilcClient client = conn->client;
 583   SilcCommandPayload payload = state_context;
 584   SilcArgumentPayload args = silc_command_get_args(payload);
 585   SilcClientEntry client_entry;
 586   SilcServerEntry server_entry;
 587   SilcChannelEntry channel_entry;
 588   SilcUInt32 len;
 589   SilcID id;
 590   char *name = NULL, *info = NULL;
 591
 592   CHECK_STATUS("IDENTIFY: ");
 593   CHECK_ARGS(2, 4);
 594
 595   /* Get the ID */
 596   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 597     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 598     goto out;
 599   }
 600
 601   /* Get names */
 602   name = silc_argument_get_arg_type(args, 3, &len);
 603   info = silc_argument_get_arg_type(args, 4, &len);
 604
 605   switch (id.type) {
 606   case SILC_ID_CLIENT:
 607     SILC_LOG_DEBUG(("Received client information"));
 608
 609     /* Check if we have this client cached already. */
 610     client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 611     if (!client_entry) {
 612       SILC_LOG_DEBUG(("Adding new client entry (IDENTIFY)"));
 613       client_entry =
 614         silc_client_add_client(client, conn, name, info, NULL,
 615                                &id.u.client_id, 0);
 616       if (!client_entry) {
 617         ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
 618         goto out;
 619       }
 620       silc_client_ref_client(client, conn, client_entry);
 621     } else {
 622       silc_client_update_client(client, conn, client_entry,
 623                                 name, info, NULL, 0);
 624     }
 625
 626     /* Notify application */
 627     silc_client_command_callback(cmd, client_entry, name, info);
 628     silc_client_unref_client(client, conn, client_entry);
 629     break;
 630
 631   case SILC_ID_SERVER:
 632     SILC_LOG_DEBUG(("Received server information"));
 633
 634     /* Check if we have this server cached already. */
 635     server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
 636     if (!server_entry) {
 637       SILC_LOG_DEBUG(("Adding new server entry (IDENTIFY)"));
 638       server_entry = silc_client_add_server(client, conn, name, info,
 639                                             &id.u.server_id);
 640       if (!server_entry) {
 641         ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 642         goto out;
 643       }
 644       silc_client_ref_server(client, conn, server_entry);
 645     } else {
 646       silc_client_update_server(client, conn, server_entry, name, info);
 647     }
 648     server_entry->internal.resolve_cmd_ident = 0;
 649
 650     /* Notify application */
 651     silc_client_command_callback(cmd, server_entry, name, info);
 652     silc_client_unref_server(client, conn, server_entry);
 653     break;
 654
 655   case SILC_ID_CHANNEL:
 656     SILC_LOG_DEBUG(("Received channel information"));
 657
 658     /* Check if we have this channel cached already. */
 659     channel_entry = silc_client_get_channel_by_id(client, conn,
 660                                                   &id.u.channel_id);
 661     if (!channel_entry) {
 662       SILC_LOG_DEBUG(("Adding new channel entry (IDENTIFY)"));
 663
 664       if (!name) {
 665         ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 666         goto out;
 667       }
 668
 669       /* Add new channel entry */
 670       channel_entry = silc_client_add_channel(client, conn, name, 0,
 671                                               &id.u.channel_id);
 672       if (!channel_entry) {
 673         ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 674         goto out;
 675       }
 676       silc_client_ref_channel(client, conn, channel_entry);
 677     }
 678
 679     /* Notify application */
 680     silc_client_command_callback(cmd, channel_entry,
 681                                  channel_entry->channel_name, info);
 682     silc_client_unref_channel(client, conn, channel_entry);
 683     break;
 684   }
 685
 686  out:
 687   silc_fsm_next(fsm, silc_client_command_reply_processed);
 688   return SILC_FSM_CONTINUE;
 689 }
 690
 691 /********************************** NICK ************************************/
 692
 693 /* Received reply for command NICK. */
 694
 695 SILC_FSM_STATE(silc_client_command_reply_nick)
 696 {
 697   SilcClientCommandContext cmd = fsm_context;
 698   SilcClientConnection conn = cmd->conn;
 699   SilcClient client = conn->client;
 700   SilcCommandPayload payload = state_context;
 701   SilcArgumentPayload args = silc_command_get_args(payload);
 702   unsigned char *nick, *idp;
 703   SilcUInt32 len, idp_len;
 704   SilcClientID old_client_id;
 705   SilcID id;
 706
 707   /* Sanity checks */
 708   CHECK_STATUS("Cannot set nickname: ");
 709   CHECK_ARGS(2, 3);
 710
 711   /* Take received Client ID */
 712   idp = silc_argument_get_arg_type(args, 2, &idp_len);
 713   if (!idp) {
 714     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 715     goto out;
 716   }
 717   if (!silc_id_payload_parse_id(idp, idp_len, &id)) {
 718     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 719     goto out;
 720   }
 721
 722   /* Take the new nickname */
 723   nick = silc_argument_get_arg_type(args, 3, &len);
 724   if (!nick) {
 725     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 726     goto out;
 727   }
 728
 729   silc_rwlock_wrlock(conn->local_entry->internal.lock);
 730
 731   /* Change the nickname */
 732   old_client_id = *conn->local_id;
 733   if (!silc_client_change_nickname(client, conn, conn->local_entry,
 734                                    nick, &id.u.client_id, idp, idp_len)) {
 735     ERROR_CALLBACK(SILC_STATUS_ERR_BAD_NICKNAME);
 736     silc_rwlock_unlock(conn->local_entry->internal.lock);
 737     goto out;
 738   }
 739
 740   silc_rwlock_unlock(conn->local_entry->internal.lock);
 741
 742   /* Notify application */
 743   silc_client_command_callback(cmd, conn->local_entry,
 744                                conn->local_entry->nickname, &old_client_id);
 745
 746  out:
 747   silc_fsm_next(fsm, silc_client_command_reply_processed);
 748   return SILC_FSM_CONTINUE;
 749 }
 750
 751 /********************************** LIST ************************************/
 752
 753 /* Received reply to the LIST command. */
 754
 755 SILC_FSM_STATE(silc_client_command_reply_list)
 756 {
 757   SilcClientCommandContext cmd = fsm_context;
 758   SilcClientConnection conn = cmd->conn;
 759   SilcClient client = conn->client;
 760   SilcCommandPayload payload = state_context;
 761   SilcArgumentPayload args = silc_command_get_args(payload);
 762   unsigned char *tmp, *name, *topic;
 763   SilcUInt32 usercount = 0;
 764   SilcChannelEntry channel_entry = NULL;
 765   SilcID id;
 766
 767   /* Sanity checks */
 768   CHECK_STATUS("Cannot list channels: ");
 769
 770   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 771     /* There were no channels in the network. */
 772     silc_client_command_callback(cmd, NULL, NULL, NULL, 0);
 773     silc_fsm_next(fsm, silc_client_command_reply_processed);
 774     return SILC_FSM_CONTINUE;
 775   }
 776
 777   CHECK_ARGS(3, 5);
 778
 779   name = silc_argument_get_arg_type(args, 3, NULL);
 780   if (!name) {
 781     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 782     goto out;
 783   }
 784
 785   topic = silc_argument_get_arg_type(args, 4, NULL);
 786   tmp = silc_argument_get_arg_type(args, 5, NULL);
 787   if (tmp)
 788     SILC_GET32_MSB(usercount, tmp);
 789
 790   /* Check whether the channel exists, and add it to cache if it doesn't. */
 791   channel_entry = silc_client_get_channel_by_id(client, conn,
 792                                                 &id.u.channel_id);
 793   if (!channel_entry) {
 794     /* Add new channel entry */
 795     channel_entry = silc_client_add_channel(client, conn, name, 0,
 796                                             &id.u.channel_id);
 797     if (!channel_entry) {
 798       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 799       goto out;
 800     }
 801     silc_client_ref_channel(client, conn, channel_entry);
 802   }
 803
 804   /* Notify application */
 805   silc_client_command_callback(cmd, channel_entry, channel_entry->channel_name,
 806                                topic, usercount);
 807
 808  out:
 809   silc_client_unref_channel(client, conn, channel_entry);
 810   silc_fsm_next(fsm, silc_client_command_reply_processed);
 811   return SILC_FSM_CONTINUE;
 812 }
 813
 814 /********************************* TOPIC ************************************/
 815
 816 /* Received reply to topic command. */
 817
 818 SILC_FSM_STATE(silc_client_command_reply_topic)
 819 {
 820   SilcClientCommandContext cmd = fsm_context;
 821   SilcClientConnection conn = cmd->conn;
 822   SilcClient client = conn->client;
 823   SilcCommandPayload payload = state_context;
 824   SilcArgumentPayload args = silc_command_get_args(payload);
 825   SilcChannelEntry channel = NULL;
 826   char *topic;
 827   SilcUInt32 len;
 828   SilcID id;
 829
 830   /* Sanity checks */
 831   CHECK_STATUS("Cannot set topic: ");
 832   CHECK_ARGS(2, 3);
 833
 834   /* Take Channel ID */
 835   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 836     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 837     goto out;
 838   }
 839
 840   /* Get the channel entry */
 841   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
 842   if (!channel) {
 843     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 844     goto out;
 845   }
 846
 847   silc_rwlock_wrlock(channel->internal.lock);
 848
 849   /* Take topic */
 850   topic = silc_argument_get_arg_type(args, 3, &len);
 851   if (topic) {
 852     silc_free(channel->topic);
 853     channel->topic = silc_memdup(topic, len);
 854   }
 855
 856   silc_rwlock_unlock(channel->internal.lock);
 857
 858   /* Notify application */
 859   silc_client_command_callback(cmd, channel, channel->topic);
 860
 861  out:
 862   silc_client_unref_channel(client, conn, channel);
 863   silc_fsm_next(fsm, silc_client_command_reply_processed);
 864   return SILC_FSM_CONTINUE;
 865 }
 866
 867 /********************************* INVITE ***********************************/
 868
 869 /* Received reply to invite command. */
 870
 871 SILC_FSM_STATE(silc_client_command_reply_invite)
 872 {
 873   SilcClientCommandContext cmd = fsm_context;
 874   SilcClientConnection conn = cmd->conn;
 875   SilcClient client = conn->client;
 876   SilcCommandPayload payload = state_context;
 877   SilcArgumentPayload args = silc_command_get_args(payload);
 878   SilcChannelEntry channel = NULL;
 879   unsigned char *tmp;
 880   SilcUInt32 len;
 881   SilcArgumentPayload invite_args = NULL;
 882   SilcID id;
 883
 884   /* Sanity checks */
 885   CHECK_STATUS("Cannot invite: ");
 886   CHECK_ARGS(2, 3);
 887
 888   /* Take Channel ID */
 889   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 890     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 891     goto out;
 892   }
 893
 894   /* Get the channel entry */
 895   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
 896   if (!channel) {
 897     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 898     goto out;
 899   }
 900
 901   /* Get the invite list */
 902   tmp = silc_argument_get_arg_type(args, 3, &len);
 903   if (tmp)
 904     invite_args = silc_argument_list_parse(tmp, len);
 905
 906   /* Notify application */
 907   silc_client_command_callback(cmd, channel, invite_args);
 908
 909   if (invite_args)
 910     silc_argument_payload_free(invite_args);
 911
 912  out:
 913   silc_client_unref_channel(client, conn, channel);
 914   silc_fsm_next(fsm, silc_client_command_reply_processed);
 915   return SILC_FSM_CONTINUE;
 916 }
 917
 918 /********************************** KILL ************************************/
 919
 920 /* Received reply to the KILL command. */
 921
 922 SILC_FSM_STATE(silc_client_command_reply_kill)
 923 {
 924   SilcClientCommandContext cmd = fsm_context;
 925   SilcClientConnection conn = cmd->conn;
 926   SilcClient client = conn->client;
 927   SilcCommandPayload payload = state_context;
 928   SilcArgumentPayload args = silc_command_get_args(payload);
 929   SilcClientEntry client_entry;
 930   SilcID id;
 931
 932   /* Sanity checks */
 933   CHECK_STATUS("Cannot kill: ");
 934   CHECK_ARGS(2, 2);
 935
 936   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 937     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 938     goto out;
 939   }
 940
 941   /* Get the client entry, if exists */
 942   client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 943
 944   /* Notify application */
 945   silc_client_command_callback(cmd, client_entry);
 946
 947   /* Remove the client */
 948   if (client_entry) {
 949     silc_client_remove_from_channels(client, conn, client_entry);
 950     silc_client_del_client(client, conn, client_entry);
 951     silc_client_unref_client(client, conn, client_entry);
 952   }
 953
 954  out:
 955   silc_fsm_next(fsm, silc_client_command_reply_processed);
 956   return SILC_FSM_CONTINUE;
 957 }
 958
 959 /********************************** INFO ************************************/
 960
 961 /* Received reply to INFO command. We receive the server ID and some
 962    information about the server user requested. */
 963
 964 SILC_FSM_STATE(silc_client_command_reply_info)
 965 {
 966   SilcClientCommandContext cmd = fsm_context;
 967   SilcClientConnection conn = cmd->conn;
 968   SilcClient client = conn->client;
 969   SilcCommandPayload payload = state_context;
 970   SilcArgumentPayload args = silc_command_get_args(payload);
 971   SilcServerEntry server;
 972   char *server_name, *server_info;
 973   SilcID id;
 974
 975   /* Sanity checks */
 976   CHECK_STATUS("Cannot get info: ");
 977   CHECK_ARGS(4, 4);
 978
 979   /* Get server ID */
 980   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
 981     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 982     goto out;
 983   }
 984
 985   /* Get server name */
 986   server_name = silc_argument_get_arg_type(args, 3, NULL);
 987   if (!server_name) {
 988     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 989     goto out;
 990   }
 991
 992   /* Get server info */
 993   server_info = silc_argument_get_arg_type(args, 4, NULL);
 994   if (!server_info) {
 995     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
 996     goto out;
 997   }
 998
 999   /* See whether we have this server cached. If not create it. */
1000   server = silc_client_get_server_by_id(client, conn, &id.u.server_id);
1001   if (!server) {
1002     SILC_LOG_DEBUG(("Add new server entry (INFO)"));
1003     server = silc_client_add_server(client, conn, server_name,
1004                                     server_info, &id.u.server_id);
1005     if (!server)
1006       goto out;
1007     silc_client_ref_server(client, conn, server);
1008   }
1009
1010   /* Notify application */
1011   silc_client_command_callback(cmd, server, server->server_name,
1012                                server->server_info);
1013   silc_client_unref_server(client, conn, server);
1014
1015  out:
1016   silc_fsm_next(fsm, silc_client_command_reply_processed);
1017   return SILC_FSM_CONTINUE;
1018 }
1019
1020 /********************************** STATS ***********************************/
1021
1022 /* Received reply to STATS command. */
1023
1024 SILC_FSM_STATE(silc_client_command_reply_stats)
1025 {
1026   SilcClientCommandContext cmd = fsm_context;
1027   SilcCommandPayload payload = state_context;
1028   SilcArgumentPayload args = silc_command_get_args(payload);
1029   SilcClientStats stats;
1030   unsigned char *buf = NULL;
1031   SilcUInt32 buf_len = 0;
1032   SilcBufferStruct b;
1033   SilcID id;
1034
1035   /* Sanity checks */
1036   CHECK_STATUS("Cannot get stats: ");
1037   CHECK_ARGS(2, 3);
1038
1039   /* Get server ID */
1040   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1041     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1042     goto out;
1043   }
1044
1045   /* Get statistics structure */
1046   memset(&stats, 0, sizeof(stats));
1047   buf = silc_argument_get_arg_type(args, 3, &buf_len);
1048   if (buf) {
1049     silc_buffer_set(&b, buf, buf_len);
1050     silc_buffer_unformat(&b,
1051                          SILC_STR_UI_INT(&stats.starttime),
1052                          SILC_STR_UI_INT(&stats.uptime),
1053                          SILC_STR_UI_INT(&stats.my_clients),
1054                          SILC_STR_UI_INT(&stats.my_channels),
1055                          SILC_STR_UI_INT(&stats.my_server_ops),
1056                          SILC_STR_UI_INT(&stats.my_router_ops),
1057                          SILC_STR_UI_INT(&stats.cell_clients),
1058                          SILC_STR_UI_INT(&stats.cell_channels),
1059                          SILC_STR_UI_INT(&stats.cell_servers),
1060                          SILC_STR_UI_INT(&stats.clients),
1061                          SILC_STR_UI_INT(&stats.channels),
1062                          SILC_STR_UI_INT(&stats.servers),
1063                          SILC_STR_UI_INT(&stats.routers),
1064                          SILC_STR_UI_INT(&stats.server_ops),
1065                          SILC_STR_UI_INT(&stats.router_ops),
1066                          SILC_STR_END);
1067   }
1068
1069   /* Notify application */
1070   silc_client_command_callback(cmd, &stats);
1071
1072  out:
1073   silc_fsm_next(fsm, silc_client_command_reply_processed);
1074   return SILC_FSM_CONTINUE;
1075 }
1076
1077 /********************************** PING ************************************/
1078
1079 /* Received reply to PING command. */
1080
1081 SILC_FSM_STATE(silc_client_command_reply_ping)
1082 {
1083   SilcClientCommandContext cmd = fsm_context;
1084   SilcClientConnection conn = cmd->conn;
1085   SilcClient client = conn->client;
1086   SilcInt64 diff;
1087
1088   diff = silc_time() - SILC_PTR_TO_64(cmd->context);
1089   if (cmd->verbose)
1090     SAY(client, conn, SILC_CLIENT_MESSAGE_INFO,
1091         "Ping reply from %s: %d second%s", conn->remote_host,
1092         (int)diff, diff == 1 ? "" : "s");
1093
1094   /* Notify application */
1095   silc_client_command_callback(cmd);
1096
1097   silc_fsm_next(fsm, silc_client_command_reply_processed);
1098   return SILC_FSM_CONTINUE;
1099 }
1100
1101 /********************************** JOIN ************************************/
1102
1103 /* Continue JOIN command reply processing after resolving unknown users */
1104
1105 static void
1106 silc_client_command_reply_join_resolved(SilcClient client,
1107                                         SilcClientConnection conn,
1108                                         SilcStatus status,
1109                                         SilcDList clients,
1110                                         void *context)
1111 {
1112   SilcClientCommandContext cmd = context;
1113   SilcChannelEntry channel = cmd->context;
1114
1115   channel->internal.resolve_cmd_ident = 0;
1116   silc_client_unref_channel(client, conn, channel);
1117
1118   SILC_FSM_CALL_CONTINUE(&cmd->thread);
1119 }
1120
1121
1122 /* Received reply for JOIN command. */
1123
1124 SILC_FSM_STATE(silc_client_command_reply_join)
1125 {
1126   SilcClientCommandContext cmd = fsm_context;
1127   SilcClientConnection conn = cmd->conn;
1128   SilcClient client = conn->client;
1129   SilcCommandPayload payload = state_context;
1130   SilcArgumentPayload args = silc_command_get_args(payload);
1131   SilcChannelEntry channel;
1132   SilcUInt32 mode = 0, len, list_count;
1133   char *topic, *tmp, *channel_name = NULL, *hmac;
1134   const char *cipher;
1135   SilcBufferStruct client_id_list, client_mode_list, keyp;
1136   SilcHashTableList htl;
1137   SilcID id;
1138   int i;
1139
1140   /* Sanity checks */
1141   CHECK_STATUS("Cannot join channel: ");
1142   CHECK_ARGS(9, 17);
1143
1144   /* Get channel name */
1145   channel_name = silc_argument_get_arg_type(args, 2, NULL);
1146   if (!channel_name) {
1147     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1148     goto out;
1149   }
1150
1151   /* Get Channel ID */
1152   if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
1153     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1154     goto out;
1155   }
1156
1157   /* Check whether we have this channel entry already. */
1158   channel = silc_client_get_channel(client, conn, channel_name);
1159   if (channel) {
1160     if (!SILC_ID_CHANNEL_COMPARE(&channel->id, &id.u.channel_id))
1161       silc_client_replace_channel_id(client, conn, channel, &id.u.channel_id);
1162   } else {
1163     /* Create new channel entry */
1164     channel = silc_client_add_channel(client, conn, channel_name,
1165                                       mode, &id.u.channel_id);
1166     if (!channel) {
1167       ERROR_CALLBACK(SILC_STATUS_ERR_BAD_CHANNEL);
1168       goto out;
1169     }
1170     silc_client_ref_channel(client, conn, channel);
1171   }
1172
1173   /* Get the list count */
1174   tmp = silc_argument_get_arg_type(args, 12, &len);
1175   if (!tmp) {
1176     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1177     goto out;
1178   }
1179   SILC_GET32_MSB(list_count, tmp);
1180
1181   /* Get Client ID list */
1182   tmp = silc_argument_get_arg_type(args, 13, &len);
1183   if (!tmp) {
1184     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1185     goto out;
1186   }
1187   silc_buffer_set(&client_id_list, tmp, len);
1188
1189   /* Resolve users we do not know about */
1190   if (!cmd->resolved) {
1191     cmd->resolved = TRUE;
1192     cmd->context = channel;
1193     SILC_FSM_CALL(channel->internal.resolve_cmd_ident =
1194                   silc_client_get_clients_by_list(
1195                           client, conn, list_count, &client_id_list,
1196                           silc_client_command_reply_join_resolved, cmd));
1197     /* NOT REACHED */
1198   }
1199
1200   /* Get client mode list */
1201   tmp = silc_argument_get_arg_type(args, 14, &len);
1202   if (!tmp) {
1203     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1204     goto out;
1205   }
1206   silc_buffer_set(&client_mode_list, tmp, len);
1207
1208   silc_rwlock_wrlock(channel->internal.lock);
1209
1210   /* Add clients we received in the reply to the channel */
1211   for (i = 0; i < list_count; i++) {
1212     SilcUInt16 idp_len;
1213     SilcID id;
1214     SilcClientEntry client_entry;
1215
1216     /* Client ID */
1217     SILC_GET16_MSB(idp_len, client_id_list.data + 2);
1218     idp_len += 4;
1219     if (!silc_id_payload_parse_id(client_id_list.data, idp_len, &id))
1220       continue;
1221
1222     /* Mode */
1223     SILC_GET32_MSB(mode, client_mode_list.data);
1224
1225     /* Get client entry */
1226     client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
1227     if (client_entry && client_entry->internal.valid) {
1228       /* Join client to the channel */
1229       silc_rwlock_wrlock(client_entry->internal.lock);
1230       silc_client_add_to_channel(client, conn, channel, client_entry, mode);
1231       silc_rwlock_unlock(client_entry->internal.lock);
1232     }
1233     silc_client_unref_client(client, conn, client_entry);
1234
1235     if (!silc_buffer_pull(&client_id_list, idp_len)) {
1236       silc_rwlock_unlock(channel->internal.lock);
1237       goto out;
1238     }
1239     if (!silc_buffer_pull(&client_mode_list, 4)) {
1240       silc_rwlock_unlock(channel->internal.lock);
1241       goto out;
1242     }
1243   }
1244
1245   /* Get hmac */
1246   hmac = silc_argument_get_arg_type(args, 11, NULL);
1247   if (hmac) {
1248     if (!silc_hmac_alloc(hmac, NULL, &channel->internal.hmac)) {
1249       if (cmd->verbose)
1250         SAY(client, conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR,
1251             "Cannot join channel: Unsupported HMAC `%s'", hmac);
1252       ERROR_CALLBACK(SILC_STATUS_ERR_UNKNOWN_ALGORITHM);
1253       silc_rwlock_unlock(channel->internal.lock);
1254       goto out;
1255     }
1256   }
1257
1258   /* Get channel mode */
1259   tmp = silc_argument_get_arg_type(args, 5, &len);
1260   if (tmp && len == 4)
1261     SILC_GET32_MSB(mode, tmp);
1262   channel->mode = mode;
1263
1264   /* Get channel key and save it */
1265   tmp = silc_argument_get_arg_type(args, 7, &len);
1266   if (tmp) {
1267     silc_buffer_set(&keyp, tmp, len);
1268     silc_client_save_channel_key(client, conn, &keyp, channel);
1269   }
1270
1271   /* Get topic */
1272   topic = silc_argument_get_arg_type(args, 10, NULL);
1273   if (topic) {
1274     silc_free(channel->topic);
1275     channel->topic = silc_memdup(topic, strlen(topic));
1276   }
1277
1278   /* Get founder key */
1279   tmp = silc_argument_get_arg_type(args, 15, &len);
1280   if (tmp) {
1281     if (channel->founder_key)
1282       silc_pkcs_public_key_free(channel->founder_key);
1283     channel->founder_key = NULL;
1284     silc_public_key_payload_decode(tmp, len, &channel->founder_key);
1285   }
1286
1287   /* Get user limit */
1288   tmp = silc_argument_get_arg_type(args, 17, &len);
1289   if (tmp && len == 4)
1290     SILC_GET32_MSB(channel->user_limit, tmp);
1291   if (!(channel->mode & SILC_CHANNEL_MODE_ULIMIT))
1292     channel->user_limit = 0;
1293
1294   /* Get channel public key list */
1295   tmp = silc_argument_get_arg_type(args, 16, &len);
1296   if (tmp)
1297     silc_client_channel_save_public_keys(channel, tmp, len, FALSE);
1298
1299   /* Set current channel */
1300   conn->current_channel = channel;
1301
1302   silc_rwlock_unlock(channel->internal.lock);
1303
1304   cipher = (channel->internal.send_key ?
1305             silc_cipher_get_name(channel->internal.send_key) : NULL);
1306   silc_hash_table_list(channel->user_list, &htl);
1307
1308   /* Notify application */
1309   silc_client_command_callback(cmd, channel->channel_name, channel, mode, &htl,
1310                                topic, cipher, hmac, channel->founder_key,
1311                                channel->channel_pubkeys, channel->user_limit);
1312
1313   silc_hash_table_list_reset(&htl);
1314   silc_client_unref_channel(client, conn, channel);
1315
1316  out:
1317   silc_fsm_next(fsm, silc_client_command_reply_processed);
1318   return SILC_FSM_CONTINUE;
1319 }
1320
1321 /********************************** MOTD ************************************/
1322
1323 /* Received reply for MOTD command */
1324
1325 SILC_FSM_STATE(silc_client_command_reply_motd)
1326 {
1327   SilcClientCommandContext cmd = fsm_context;
1328   SilcClientConnection conn = cmd->conn;
1329   SilcClient client = conn->client;
1330   SilcCommandPayload payload = state_context;
1331   SilcArgumentPayload args = silc_command_get_args(payload);
1332   SilcUInt32 i;
1333   char *motd = NULL, *cp, line[256];
1334
1335   /* Sanity checks */
1336   CHECK_STATUS("Cannot get motd: ");
1337   CHECK_ARGS(2, 3);
1338
1339   if (silc_argument_get_arg_num(args) == 3) {
1340     motd = silc_argument_get_arg_type(args, 3, NULL);
1341     if (!motd) {
1342       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1343       goto out;
1344     }
1345
1346     i = 0;
1347     cp = motd;
1348     while(cp[i] != 0) {
1349       if (cp[i++] == '\n') {
1350         memset(line, 0, sizeof(line));
1351         silc_strncat(line, sizeof(line), cp, i - 1);
1352         cp += i;
1353
1354         if (i == 2)
1355           line[0] = ' ';
1356
1357         if (cmd->verbose)
1358           SAY(client, conn, SILC_CLIENT_MESSAGE_INFO, "%s", line);
1359
1360         if (!strlen(cp))
1361           break;
1362         i = 0;
1363       }
1364     }
1365   }
1366
1367   /* Notify application */
1368   silc_client_command_callback(cmd, motd);
1369
1370  out:
1371   silc_fsm_next(fsm, silc_client_command_reply_processed);
1372   return SILC_FSM_CONTINUE;
1373 }
1374
1375 /********************************** UMODE ***********************************/
1376
1377 /* Received reply to the UMODE command. Save the current user mode */
1378
1379 SILC_FSM_STATE(silc_client_command_reply_umode)
1380 {
1381   SilcClientCommandContext cmd = fsm_context;
1382   SilcClientConnection conn = cmd->conn;
1383   SilcCommandPayload payload = state_context;
1384   SilcArgumentPayload args = silc_command_get_args(payload);
1385   unsigned char *tmp;
1386   SilcUInt32 mode, len;
1387
1388   /* Sanity checks */
1389   CHECK_STATUS("Cannot change mode: ");
1390   CHECK_ARGS(2, 2);
1391
1392   tmp = silc_argument_get_arg_type(args, 2, &len);
1393   if (!tmp || len != 4) {
1394     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1395     goto out;
1396   }
1397
1398   SILC_GET32_MSB(mode, tmp);
1399   silc_rwlock_wrlock(conn->local_entry->internal.lock);
1400   conn->local_entry->mode = mode;
1401   silc_rwlock_unlock(conn->local_entry->internal.lock);
1402
1403   /* Notify application */
1404   silc_client_command_callback(cmd, mode);
1405
1406  out:
1407   silc_fsm_next(fsm, silc_client_command_reply_processed);
1408   return SILC_FSM_CONTINUE;
1409 }
1410
1411 /********************************** CMODE ***********************************/
1412
1413 /* Received reply for CMODE command. */
1414
1415 SILC_FSM_STATE(silc_client_command_reply_cmode)
1416 {
1417   SilcClientCommandContext cmd = fsm_context;
1418   SilcClientConnection conn = cmd->conn;
1419   SilcClient client = conn->client;
1420   SilcCommandPayload payload = state_context;
1421   SilcArgumentPayload args = silc_command_get_args(payload);
1422   unsigned char *tmp;
1423   SilcUInt32 mode;
1424   SilcChannelEntry channel = NULL;
1425   SilcUInt32 len;
1426   SilcPublicKey public_key = NULL;
1427   SilcID id;
1428
1429   /* Sanity checks */
1430   CHECK_STATUS("Cannot change mode: ");
1431   CHECK_ARGS(3, 6);
1432
1433   /* Take Channel ID */
1434   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1435     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1436     goto out;
1437   }
1438
1439   /* Get the channel entry */
1440   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1441   if (!channel) {
1442     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1443     goto out;
1444   }
1445
1446   /* Get founder public key */
1447   tmp = silc_argument_get_arg_type(args, 4, &len);
1448   if (tmp)
1449     silc_public_key_payload_decode(tmp, len, &public_key);
1450
1451   /* Get channel mode */
1452   tmp = silc_argument_get_arg_type(args, 3, &len);
1453   if (!tmp || len != 4) {
1454     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1455     goto out;
1456   }
1457   SILC_GET32_MSB(mode, tmp);
1458
1459   silc_rwlock_wrlock(channel->internal.lock);
1460
1461   /* Get user limit */
1462   tmp = silc_argument_get_arg_type(args, 6, &len);
1463   if (tmp && len == 4)
1464     SILC_GET32_MSB(channel->user_limit, tmp);
1465   if (!(channel->mode & SILC_CHANNEL_MODE_ULIMIT))
1466     channel->user_limit = 0;
1467
1468   /* Get channel public key(s) */
1469   tmp = silc_argument_get_arg_type(args, 5, &len);
1470   if (tmp)
1471     silc_client_channel_save_public_keys(channel, tmp, len, FALSE);
1472   else if (channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH)
1473     silc_client_channel_save_public_keys(channel, NULL, 0, TRUE);
1474
1475   /* Save the mode */
1476   channel->mode = mode;
1477
1478   silc_rwlock_unlock(channel->internal.lock);
1479
1480   /* Notify application */
1481   silc_client_command_callback(cmd, channel, mode, public_key,
1482                                channel->channel_pubkeys, channel->user_limit);
1483
1484   silc_rwlock_wrlock(channel->internal.lock);
1485
1486   /* If founder key changed, update it */
1487   if (public_key &&
1488       (!channel->founder_key ||
1489        !silc_pkcs_public_key_compare(public_key, channel->founder_key))) {
1490     if (channel->founder_key)
1491       silc_pkcs_public_key_free(channel->founder_key);
1492     channel->founder_key = public_key;
1493     public_key = NULL;
1494   }
1495
1496   silc_rwlock_unlock(channel->internal.lock);
1497
1498  out:
1499   silc_client_unref_channel(client, conn, channel);
1500   if (public_key)
1501     silc_pkcs_public_key_free(public_key);
1502   silc_fsm_next(fsm, silc_client_command_reply_processed);
1503   return SILC_FSM_CONTINUE;
1504 }
1505
1506 /********************************** CUMODE **********************************/
1507
1508 /* Received reply for CUMODE command */
1509
1510 SILC_FSM_STATE(silc_client_command_reply_cumode)
1511 {
1512   SilcClientCommandContext cmd = fsm_context;
1513   SilcClientConnection conn = cmd->conn;
1514   SilcClient client = conn->client;
1515   SilcCommandPayload payload = state_context;
1516   SilcArgumentPayload args = silc_command_get_args(payload);
1517   SilcClientEntry client_entry;
1518   SilcChannelEntry channel = NULL;
1519   SilcChannelUser chu;
1520   unsigned char *modev;
1521   SilcUInt32 len, mode;
1522   SilcID id;
1523
1524   /* Sanity checks */
1525   CHECK_STATUS("Cannot change mode: ");
1526   CHECK_ARGS(4, 4);
1527
1528   /* Get channel mode */
1529   modev = silc_argument_get_arg_type(args, 2, &len);
1530   if (!modev || len != 4) {
1531     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1532     goto out;
1533   }
1534   SILC_GET32_MSB(mode, modev);
1535
1536   /* Take Channel ID */
1537   if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
1538     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1539     goto out;
1540   }
1541
1542   /* Get the channel entry */
1543   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1544   if (!channel) {
1545     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1546     goto out;
1547   }
1548
1549   /* Get Client ID */
1550   if (!silc_argument_get_decoded(args, 4, SILC_ARGUMENT_ID, &id, NULL)) {
1551     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1552     goto out;
1553   }
1554
1555   /* Get client entry */
1556   client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
1557   if (!client_entry) {
1558     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1559     goto out;
1560   }
1561
1562   /* Save the mode */
1563   silc_rwlock_wrlock(channel->internal.lock);
1564   chu = silc_client_on_channel(channel, client_entry);
1565   if (chu)
1566     chu->mode = mode;
1567   silc_rwlock_unlock(channel->internal.lock);
1568
1569   /* Notify application */
1570   silc_client_command_callback(cmd, mode, channel, client_entry);
1571
1572   silc_client_unref_client(client, conn, client_entry);
1573
1574  out:
1575   silc_client_unref_channel(client, conn, channel);
1576   silc_fsm_next(fsm, silc_client_command_reply_processed);
1577   return SILC_FSM_CONTINUE;
1578 }
1579
1580 /********************************** KICK ************************************/
1581
1582 SILC_FSM_STATE(silc_client_command_reply_kick)
1583 {
1584   SilcClientCommandContext cmd = fsm_context;
1585   SilcClientConnection conn = cmd->conn;
1586   SilcClient client = conn->client;
1587   SilcCommandPayload payload = state_context;
1588   SilcArgumentPayload args = silc_command_get_args(payload);
1589   SilcClientEntry client_entry;
1590   SilcChannelEntry channel = NULL;
1591   SilcID id;
1592
1593   /* Sanity checks */
1594   CHECK_STATUS("Cannot kick: ");
1595   CHECK_ARGS(3, 3);
1596
1597   /* Take Channel ID */
1598   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1599     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1600     goto out;
1601   }
1602
1603   /* Get the channel entry */
1604   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1605   if (!channel) {
1606     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1607     goto out;
1608   }
1609
1610   /* Get Client ID */
1611   if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
1612     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1613     goto out;
1614   }
1615
1616   /* Get client entry */
1617   client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
1618   if (!client_entry) {
1619     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1620     goto out;
1621   }
1622
1623   /* Notify application */
1624   silc_client_command_callback(cmd, channel, client_entry);
1625
1626   silc_client_unref_client(client, conn, client_entry);
1627
1628  out:
1629   silc_client_unref_channel(client, conn, channel);
1630   silc_fsm_next(fsm, silc_client_command_reply_processed);
1631   return SILC_FSM_CONTINUE;
1632 }
1633
1634 /******************************** SILCOPER **********************************/
1635
1636 SILC_FSM_STATE(silc_client_command_reply_silcoper)
1637 {
1638   SilcClientCommandContext cmd = fsm_context;
1639   SilcCommandPayload payload = state_context;
1640   SilcArgumentPayload args = silc_command_get_args(payload);
1641
1642   /* Sanity checks */
1643   CHECK_STATUS("Cannot change mode: ");
1644   CHECK_ARGS(1, 1);
1645
1646   /* Set user mode */
1647   cmd->conn->local_entry->mode |= SILC_UMODE_ROUTER_OPERATOR;
1648
1649   /* Notify application */
1650   silc_client_command_callback(cmd);
1651
1652   silc_fsm_next(fsm, silc_client_command_reply_processed);
1653   return SILC_FSM_CONTINUE;
1654 }
1655
1656 /********************************** OPER ************************************/
1657
1658 SILC_FSM_STATE(silc_client_command_reply_oper)
1659 {
1660   SilcClientCommandContext cmd = fsm_context;
1661   SilcCommandPayload payload = state_context;
1662   SilcArgumentPayload args = silc_command_get_args(payload);
1663
1664   /* Sanity checks */
1665   CHECK_STATUS("Cannot change mode: ");
1666   CHECK_ARGS(1, 1);
1667
1668   /* Set user mode */
1669   cmd->conn->local_entry->mode |= SILC_UMODE_SERVER_OPERATOR;
1670
1671   /* Notify application */
1672   silc_client_command_callback(cmd);
1673
1674   silc_fsm_next(fsm, silc_client_command_reply_processed);
1675   return SILC_FSM_CONTINUE;
1676 }
1677
1678 /********************************* DETACH ***********************************/
1679
1680 SILC_FSM_STATE(silc_client_command_reply_detach)
1681 {
1682   SilcClientCommandContext cmd = fsm_context;
1683   SilcClientConnection conn = cmd->conn;
1684   SilcClient client = conn->client;
1685   SilcCommandPayload payload = state_context;
1686   SilcArgumentPayload args = silc_command_get_args(payload);
1687   SilcBuffer detach;
1688
1689   /* Sanity checks */
1690   CHECK_STATUS("Cannot detach: ");
1691   CHECK_ARGS(1, 1);
1692
1693   /* Get detachment data */
1694   detach = silc_client_get_detach_data(client, conn);
1695   if (!detach) {
1696     ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
1697     goto out;
1698   }
1699
1700   /* Notify application */
1701   silc_client_command_callback(cmd, detach);
1702   silc_buffer_free(detach);
1703
1704  out:
1705   silc_fsm_next(fsm, silc_client_command_reply_processed);
1706   return SILC_FSM_CONTINUE;
1707 }
1708
1709 /********************************** WATCH ***********************************/
1710
1711 SILC_FSM_STATE(silc_client_command_reply_watch)
1712 {
1713   SilcClientCommandContext cmd = fsm_context;
1714   SilcCommandPayload payload = state_context;
1715   SilcArgumentPayload args = silc_command_get_args(payload);
1716
1717   /* Sanity checks */
1718   CHECK_STATUS("Cannot set watch: ");
1719   CHECK_ARGS(1, 1);
1720
1721   /* Notify application */
1722   silc_client_command_callback(cmd);
1723
1724   silc_fsm_next(fsm, silc_client_command_reply_processed);
1725   return SILC_FSM_CONTINUE;
1726 }
1727
1728 /*********************************** BAN ************************************/
1729
1730 SILC_FSM_STATE(silc_client_command_reply_ban)
1731 {
1732   SilcClientCommandContext cmd = fsm_context;
1733   SilcClientConnection conn = cmd->conn;
1734   SilcClient client = conn->client;
1735   SilcCommandPayload payload = state_context;
1736   SilcArgumentPayload args = silc_command_get_args(payload);
1737   SilcChannelEntry channel = NULL;
1738   unsigned char *tmp;
1739   SilcUInt32 len;
1740   SilcArgumentPayload invite_args = NULL;
1741   SilcID id;
1742
1743   /* Sanity checks */
1744   CHECK_STATUS("Cannot set ban: ");
1745   CHECK_ARGS(2, 3);
1746
1747   /* Take Channel ID */
1748   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1749     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1750     goto out;
1751   }
1752
1753   /* Get the channel entry */
1754   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1755   if (!channel) {
1756     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1757     goto out;
1758   }
1759
1760   /* Get the invite list */
1761   tmp = silc_argument_get_arg_type(args, 3, &len);
1762   if (tmp)
1763     invite_args = silc_argument_list_parse(tmp, len);
1764
1765   /* Notify application */
1766   silc_client_command_callback(cmd, channel, invite_args);
1767
1768   if (invite_args)
1769     silc_argument_payload_free(invite_args);
1770
1771  out:
1772   silc_client_unref_channel(client, conn, channel);
1773   silc_fsm_next(fsm, silc_client_command_reply_processed);
1774   return SILC_FSM_CONTINUE;
1775 }
1776
1777 /********************************** LEAVE ***********************************/
1778
1779 /* Reply to LEAVE command. */
1780
1781 SILC_FSM_STATE(silc_client_command_reply_leave)
1782 {
1783   SilcClientCommandContext cmd = fsm_context;
1784   SilcClientConnection conn = cmd->conn;
1785   SilcClient client = conn->client;
1786   SilcCommandPayload payload = state_context;
1787   SilcArgumentPayload args = silc_command_get_args(payload);
1788   SilcChannelEntry channel;
1789   SilcID id;
1790
1791   /* Sanity checks */
1792   CHECK_STATUS("Cannot set leave: ");
1793   CHECK_ARGS(2, 2);
1794
1795   /* Get Channel ID */
1796   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1797     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1798     goto out;
1799   }
1800
1801   /* Get the channel entry */
1802   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1803   if (!channel) {
1804     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1805     goto out;
1806   }
1807
1808   /* Remove us from this channel. */
1809   silc_client_remove_from_channel(client, conn, channel, conn->local_entry);
1810
1811   /* Notify application */
1812   silc_client_command_callback(cmd, channel);
1813
1814   /* Now delete the channel. */
1815   silc_client_empty_channel(client, conn, channel);
1816   silc_client_del_channel(client, conn, channel);
1817
1818  out:
1819   silc_fsm_next(fsm, silc_client_command_reply_processed);
1820   return SILC_FSM_CONTINUE;
1821 }
1822
1823 /********************************* USERS ************************************/
1824
1825 /* Continue USERS command reply processing after resolving unknown users */
1826
1827 static void
1828 silc_client_command_reply_users_resolved(SilcClient client,
1829                                          SilcClientConnection conn,
1830                                          SilcStatus status,
1831                                          SilcDList clients,
1832                                          void *context)
1833 {
1834   SilcClientCommandContext cmd = context;
1835   SILC_FSM_CALL_CONTINUE(&cmd->thread);
1836 }
1837
1838
1839 /* Continue USERS command after resolving unknown channel */
1840
1841 static void
1842 silc_client_command_reply_users_continue(SilcClient client,
1843                                          SilcClientConnection conn,
1844                                          SilcStatus status,
1845                                          SilcDList channels,
1846                                          void *context)
1847 {
1848   SilcClientCommandContext cmd = context;
1849
1850   if (!channels) {
1851     SilcCommandPayload payload = silc_fsm_get_state_context(&cmd->thread);
1852     SilcArgumentPayload args = silc_command_get_args(payload);
1853
1854     cmd->status = SILC_STATUS_ERR_NO_SUCH_CHANNEL_ID;
1855     ERROR_CALLBACK(cmd->status);
1856     silc_fsm_next(&cmd->thread, silc_client_command_reply_processed);
1857   }
1858
1859   SILC_FSM_CALL_CONTINUE(&cmd->thread);
1860 }
1861
1862 /* Reply to USERS command. Received list of client ID's and theirs modes
1863    on the channel we requested. */
1864
1865 SILC_FSM_STATE(silc_client_command_reply_users)
1866 {
1867   SilcClientCommandContext cmd = fsm_context;
1868   SilcClientConnection conn = cmd->conn;
1869   SilcClient client = conn->client;
1870   SilcCommandPayload payload = state_context;
1871   SilcArgumentPayload args = silc_command_get_args(payload);
1872   unsigned char *tmp;
1873   SilcUInt32 tmp_len, list_count, mode;
1874   SilcUInt16 idp_len;
1875   SilcHashTableList htl;
1876   SilcBufferStruct client_id_list, client_mode_list;
1877   SilcChannelEntry channel = NULL;
1878   SilcClientEntry client_entry;
1879   SilcID id;
1880   int i;
1881
1882   /* Sanity checks */
1883   CHECK_STATUS("Cannot get users: ");
1884   CHECK_ARGS(5, 5);
1885
1886   /* Get channel ID */
1887   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
1888     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1889     goto out;
1890   }
1891
1892   /* Get channel entry */
1893   channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
1894   if (!channel) {
1895     /* Resolve the channel from server */
1896     SILC_FSM_CALL(silc_client_get_channel_by_id_resolve(
1897                         client, conn, &id.u.channel_id,
1898                         silc_client_command_reply_users_continue, cmd));
1899     /* NOT REACHED */
1900   }
1901
1902   /* Get the list count */
1903   tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
1904   if (!tmp || tmp_len != 4) {
1905     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1906     goto out;
1907   }
1908   SILC_GET32_MSB(list_count, tmp);
1909
1910   /* Get Client ID list */
1911   tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
1912   if (!tmp) {
1913     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1914     goto out;
1915   }
1916   silc_buffer_set(&client_id_list, tmp, tmp_len);
1917
1918   /* Resolve users we do not know about */
1919   if (!cmd->resolved) {
1920     cmd->resolved = TRUE;
1921     silc_client_unref_channel(client, conn, channel);
1922     SILC_FSM_CALL(silc_client_get_clients_by_list(
1923                           client, conn, list_count, &client_id_list,
1924                           silc_client_command_reply_users_resolved, cmd));
1925     /* NOT REACHED */
1926   }
1927
1928   /* Get client mode list */
1929   tmp = silc_argument_get_arg_type(args, 5, &tmp_len);
1930   if (!tmp) {
1931     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
1932     goto out;
1933   }
1934   silc_buffer_set(&client_mode_list, tmp, tmp_len);
1935
1936   SILC_LOG_DEBUG(("channel %s, %d users", channel->channel_name, list_count));
1937
1938   silc_rwlock_wrlock(channel->internal.lock);
1939
1940   /* Cache the received Client ID's and modes. */
1941   for (i = 0; i < list_count; i++) {
1942     SILC_GET16_MSB(idp_len, client_id_list.data + 2);
1943     idp_len += 4;
1944     if (!silc_id_payload_parse_id(client_id_list.data, idp_len, &id))
1945       goto out;
1946
1947     /* Mode */
1948     SILC_GET32_MSB(mode, client_mode_list.data);
1949
1950     /* Save the client on this channel.  Unknown clients are ignored as they
1951        clearly do not exist since the resolving didn't find them. */
1952     client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
1953     if (client_entry && client_entry->internal.valid) {
1954       silc_rwlock_wrlock(client_entry->internal.lock);
1955       silc_client_add_to_channel(client, conn, channel, client_entry, mode);
1956       silc_rwlock_unlock(client_entry->internal.lock);
1957     }
1958     silc_client_unref_client(client, conn, client_entry);
1959
1960     if (!silc_buffer_pull(&client_id_list, idp_len)) {
1961       silc_rwlock_unlock(channel->internal.lock);
1962       goto out;
1963     }
1964     if (!silc_buffer_pull(&client_mode_list, 4)) {
1965       silc_rwlock_unlock(channel->internal.lock);
1966       goto out;
1967     }
1968   }
1969
1970   silc_rwlock_unlock(channel->internal.lock);
1971
1972   /* Notify application */
1973   silc_hash_table_list(channel->user_list, &htl);
1974   silc_client_command_callback(cmd, channel, &htl);
1975   silc_hash_table_list_reset(&htl);
1976
1977  out:
1978   silc_client_unref_channel(client, conn, channel);
1979   silc_fsm_next(fsm, silc_client_command_reply_processed);
1980   return SILC_FSM_CONTINUE;
1981 }
1982
1983 /********************************** GETKEY **********************************/
1984
1985 /* Received command reply to GETKEY command. WE've received the remote
1986    client's public key. */
1987
1988 SILC_FSM_STATE(silc_client_command_reply_getkey)
1989 {
1990   SilcClientCommandContext cmd = fsm_context;
1991   SilcClientConnection conn = cmd->conn;
1992   SilcClient client = conn->client;
1993   SilcCommandPayload payload = state_context;
1994   SilcArgumentPayload args = silc_command_get_args(payload);
1995   SilcClientEntry client_entry;
1996   SilcServerEntry server_entry;
1997   unsigned char *tmp;
1998   SilcUInt32 len;
1999   SilcPublicKey public_key;
2000   SilcID id;
2001
2002   /* Sanity checks */
2003   CHECK_STATUS("Cannot get key: ");
2004   CHECK_ARGS(2, 3);
2005
2006   /* Get the ID */
2007   if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
2008     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
2009     goto out;
2010   }
2011
2012   /* Get the public key */
2013   tmp = silc_argument_get_arg_type(args, 3, &len);
2014   if (!tmp) {
2015     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
2016     goto out;
2017   }
2018   if (!silc_public_key_payload_decode(tmp, len, &public_key)) {
2019     SAY(client, conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR,
2020         "Cannot decode public key: malformed/unsupported public key");
2021     ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
2022     goto out;
2023   }
2024
2025   if (id.type == SILC_ID_CLIENT) {
2026     /* Received client's public key */
2027     client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
2028     if (!client_entry) {
2029       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
2030       goto out;
2031     }
2032
2033     silc_rwlock_wrlock(client_entry->internal.lock);
2034
2035     /* Save fingerprint */
2036     if (!client_entry->fingerprint)
2037       silc_hash_make(conn->internal->sha1hash, tmp + 4, len - 4,
2038                      client_entry->fingerprint);
2039     if (!client_entry->public_key) {
2040       client_entry->public_key = public_key;
2041       public_key = NULL;
2042     }
2043
2044     silc_rwlock_unlock(client_entry->internal.lock);
2045
2046     /* Notify application */
2047     silc_client_command_callback(cmd, SILC_ID_CLIENT, client_entry,
2048                                  client_entry->public_key);
2049     silc_client_unref_client(client, conn, client_entry);
2050   } else if (id.type == SILC_ID_SERVER) {
2051     /* Received server's public key */
2052     server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
2053     if (!server_entry) {
2054       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
2055       goto out;
2056     }
2057
2058     silc_rwlock_wrlock(server_entry->internal.lock);
2059
2060     if (!server_entry->public_key) {
2061       server_entry->public_key = public_key;
2062       public_key = NULL;
2063     }
2064
2065     silc_rwlock_unlock(server_entry->internal.lock);
2066
2067     /* Notify application */
2068     silc_client_command_callback(cmd, SILC_ID_SERVER, server_entry,
2069                                  server_entry->public_key);
2070     silc_client_unref_server(client, conn, server_entry);
2071   }
2072
2073  out:
2074   if (public_key)
2075     silc_pkcs_public_key_free(public_key);
2076   silc_fsm_next(fsm, silc_client_command_reply_processed);
2077   return SILC_FSM_CONTINUE;
2078 }
2079
2080 /********************************** SERVICE *********************************/
2081
2082 /* Reply to SERVICE command. */
2083 /* XXX incomplete */
2084
2085 SILC_FSM_STATE(silc_client_command_reply_service)
2086 {
2087   SilcClientCommandContext cmd = fsm_context;
2088   SilcCommandPayload payload = state_context;
2089   SilcArgumentPayload args = silc_command_get_args(payload);
2090   SilcUInt32 tmp_len;
2091   unsigned char *service_list, *name;
2092
2093   /* Sanity checks */
2094   CHECK_STATUS("Cannot get service: ");
2095
2096   /* Get service list */
2097   service_list = silc_argument_get_arg_type(args, 2, &tmp_len);
2098
2099   /* Get requested service name */
2100   name = silc_argument_get_arg_type(args, 3, &tmp_len);
2101
2102   /* Notify application */
2103   silc_client_command_callback(cmd, service_list, name);
2104
2105   silc_fsm_next(fsm, silc_client_command_reply_processed);
2106   return SILC_FSM_CONTINUE;
2107 }
2108
2109 /*********************************** QUIT ***********************************/
2110
2111 /* QUIT command reply stub */
2112
2113 SILC_FSM_STATE(silc_client_command_reply_quit)
2114 {
2115   silc_fsm_next(fsm, silc_client_command_reply_processed);
2116   return SILC_FSM_CONTINUE;
2117 }