Merge commit 'origin/silc.1.1.branch'
[silc.git] / lib / silcclient / command_reply.c
index 8b2f0c35273793f87cb2f0e0451fe0931b9ce8b1..ede887535fdcdc97b6219d0c8d73f11b45867021 100644 (file)
 
   command_reply.c
 
-  Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+  Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 1997 - 2000 Pekka Riikonen
+  Copyright (C) 1997 - 2007 Pekka Riikonen
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-  
+  the Free Software Foundation; version 2 of the License.
+
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
 */
-/*
- * Command reply functions are "the otherside" of the command functions.
- * Reply to a command sent by server is handled by these functions.
- *
- * The arguments received from server are also passed to the calling
- * application through command_reply client operation.  The arguments are
- * exactly same and in same order as the server sent it.  However, ID's are
- * not sent to the application.  Instead, corresponding ID entry is sent
- * to the application.  For example, instead of sending Client ID the 
- * corresponding SilcClientEntry is sent to the application.  The case is
- * same with for example Channel ID's.  This way application has all the
- * necessary data already in hand without redundant searching.  If ID is
- * received but ID entry does not exist, NULL is sent.
- */
 /* $Id$ */
 
-#include "clientlibincludes.h"
+#include "silc.h"
+#include "silcclient.h"
+#include "client_internal.h"
+
+/************************** Types and definitions ***************************/
+
+/* Calls error command reply callback back to command sender. */
+#define ERROR_CALLBACK(err)                                    \
+do {                                                           \
+  void *arg1 = NULL, *arg2 = NULL;                             \
+  if (cmd->status != SILC_STATUS_OK)                           \
+    silc_status_get_args(cmd->status, args, &arg1, &arg2);     \
+  else                                                         \
+    cmd->status = cmd->error = err;                            \
+  SILC_LOG_DEBUG(("Error in command reply: %s",                        \
+                silc_get_status_message(cmd->status)));        \
+  silc_client_command_callback(cmd, arg1, arg2);               \
+} while(0)
+
+/* Check for error */
+#define CHECK_STATUS(msg)                                              \
+  SILC_LOG_DEBUG(("%s", silc_get_command_name(cmd->cmd)));             \
+  if (cmd->error != SILC_STATUS_OK) {                                  \
+    if (cmd->verbose)                                                  \
+      SAY(cmd->conn->client, cmd->conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR, \
+         msg "%s", silc_get_status_message(cmd->error));               \
+    ERROR_CALLBACK(cmd->error);                                                \
+    silc_client_command_process_error(cmd, state_context, cmd->error); \
+    silc_fsm_next(fsm, silc_client_command_reply_processed);           \
+    return SILC_FSM_CONTINUE;                                          \
+  }
+
+/* Check for correct arguments */
+#define CHECK_ARGS(min, max)                                   \
+  if (silc_argument_get_arg_num(args) < min ||                 \
+      silc_argument_get_arg_num(args) > max) {                 \
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);         \
+    silc_fsm_next(fsm, silc_client_command_reply_processed);   \
+    return SILC_FSM_CONTINUE;                                  \
+  }
+
+#define SAY cmd->conn->client->internal->ops->say
+
+/************************ Static utility functions **************************/
+
+/* Delivers the command reply back to application */
+
+static inline void
+silc_client_command_callback(SilcClientCommandContext cmd, ...)
+{
+  SilcClientCommandReplyCallback cb;
+  SilcList list;
+  va_list ap, cp;
+
+  va_start(ap, cmd);
+
+  /* Default reply callback */
+  if (cmd->called) {
+    silc_va_copy(cp, ap);
+    cmd->conn->client->internal->ops->command_reply(
+                      cmd->conn->client, cmd->conn, cmd->cmd, cmd->status,
+                      cmd->error, cp);
+    va_end(cp);
+  }
+
+  /* Reply callback */
+  list = cmd->reply_callbacks;
+  silc_list_start(list);
+  while ((cb = silc_list_get(list)))
+    if (!cb->do_not_call) {
+      silc_va_copy(cp, ap);
+      cb->do_not_call = !cb->reply(cmd->conn->client, cmd->conn, cmd->cmd,
+                                  cmd->status, cmd->error, cb->context, cp);
+      va_end(cp);
+    }
+
+  va_end(ap);
+}
+
+/* Handles common error status types. */
 
-/* Client command reply list. */
-SilcClientCommandReply silc_command_reply_list[] =
+static void silc_client_command_process_error(SilcClientCommandContext cmd,
+                                             SilcCommandPayload payload,
+                                             SilcStatus error)
 {
-  SILC_CLIENT_CMD_REPLY(whois, WHOIS),
-  SILC_CLIENT_CMD_REPLY(whowas, WHOWAS),
-  SILC_CLIENT_CMD_REPLY(identify, IDENTIFY),
-  SILC_CLIENT_CMD_REPLY(nick, NICK),
-  SILC_CLIENT_CMD_REPLY(list, LIST),
-  SILC_CLIENT_CMD_REPLY(topic, TOPIC),
-  SILC_CLIENT_CMD_REPLY(invite, INVITE),
-  SILC_CLIENT_CMD_REPLY(quit, QUIT),
-  SILC_CLIENT_CMD_REPLY(kill, KILL),
-  SILC_CLIENT_CMD_REPLY(info, INFO),
-  SILC_CLIENT_CMD_REPLY(connect, CONNECT),
-  SILC_CLIENT_CMD_REPLY(ping, PING),
-  SILC_CLIENT_CMD_REPLY(oper, OPER),
-  SILC_CLIENT_CMD_REPLY(join, JOIN),
-  SILC_CLIENT_CMD_REPLY(motd, MOTD),
-  SILC_CLIENT_CMD_REPLY(umode, UMODE),
-  SILC_CLIENT_CMD_REPLY(cmode, CMODE),
-  SILC_CLIENT_CMD_REPLY(cumode, CUMODE),
-  SILC_CLIENT_CMD_REPLY(kick, KICK),
-  SILC_CLIENT_CMD_REPLY(restart, RESTART),
-  SILC_CLIENT_CMD_REPLY(close, CLOSE),
-  SILC_CLIENT_CMD_REPLY(die, DIE),
-  SILC_CLIENT_CMD_REPLY(silcoper, SILCOPER),
-  SILC_CLIENT_CMD_REPLY(leave, LEAVE),
-  SILC_CLIENT_CMD_REPLY(names, NAMES),
-
-  { NULL, 0 },
-};
-
-/* Status message structure. Messages are defined below. */
-typedef struct {
-  SilcCommandStatus status;
-  char *message;
-} SilcCommandStatusMessage;
-
-/* Status messages returned by the server */
-#define STAT(x) SILC_STATUS_ERR_##x
-const SilcCommandStatusMessage silc_command_status_messages[] = {
-
-  { STAT(NO_SUCH_NICK),      "No such nickname" },
-  { STAT(NO_SUCH_CHANNEL),   "No such channel" },
-  { STAT(NO_SUCH_SERVER),    "No such server" },
-  { STAT(TOO_MANY_TARGETS),  "Duplicate recipients. No message delivered" },
-  { STAT(NO_RECIPIENT),      "No recipient given" },
-  { STAT(UNKNOWN_COMMAND),   "Unknown command" },
-  { STAT(WILDCARDS),         "Unknown command" },
-  { STAT(NO_CLIENT_ID),      "No Client ID given" },
-  { STAT(NO_CHANNEL_ID),     "No Channel ID given" },
-  { STAT(NO_SERVER_ID),      "No Server ID given" },
-  { STAT(BAD_CLIENT_ID),     "Bad Client ID" },
-  { STAT(BAD_CHANNEL_ID),    "Bad Channel ID" },
-  { STAT(NO_SUCH_CLIENT_ID), "No such Client ID" },
-  { STAT(NO_SUCH_CHANNEL_ID),"No such Channel ID" },
-  { STAT(NICKNAME_IN_USE),   "Nickname already exists" },
-  { STAT(NOT_ON_CHANNEL),    "You are not on that channel" },
-  { STAT(USER_NOT_ON_CHANNEL),"They are not on the channel" },
-  { STAT(USER_ON_CHANNEL),   "User already on the channel" },
-  { STAT(NOT_REGISTERED),    "You have not registered" },
-  { STAT(NOT_ENOUGH_PARAMS), "Not enough parameters" },
-  { STAT(TOO_MANY_PARAMS),   "Too many parameters" },
-  { STAT(PERM_DENIED),       "Your host is not among the privileged" },
-  { STAT(BANNED_FROM_SERVER),"You are banned from this server" },
-  { STAT(BAD_PASSWORD),      "Cannot join channel. Incorrect password" },
-  { STAT(CHANNEL_IS_FULL),   "Cannot join channel. Channel is full" },
-  { STAT(NOT_INVITED),     "Cannot join channel. You have not been invited" },
-  { STAT(BANNED_FROM_CHANNEL), "Cannot join channel. You have been banned" },
-  { STAT(UNKNOWN_MODE),    "Unknown mode" },
-  { STAT(NOT_YOU),         "Cannot change mode for other users" },
-  { STAT(NO_CHANNEL_PRIV), "Permission denied. You are not channel operator" },
-  { STAT(NO_SERVER_PRIV),  "Permission denied. You are not server operator" },
-  { STAT(NO_ROUTER_PRIV),  "Permission denied. You are not SILC operator" },
-  { STAT(BAD_NICKNAME),    "Bad nickname" },
-  { STAT(BAD_CHANNEL),     "Bad channel name" },
-  { STAT(AUTH_FAILED),     "Authentication failed" },
-
-  { 0, NULL }
-};
-
-/* Command reply operation that is called at the end of all command replys. 
-   Usage: COMMAND_REPLY((ARGS, argument1, argument2, etc...)), */
-#define COMMAND_REPLY(args) cmd->client->ops->command_reply args
-#define ARGS cmd->client, cmd->sock->user_data, \
-             cmd->payload, TRUE, silc_command_get(cmd->payload), status
-
-/* Error reply to application. Usage: COMMAND_REPLY_ERROR; */
-#define COMMAND_REPLY_ERROR cmd->client->ops->command_reply(cmd->client, \
-  cmd->sock->user_data, cmd->payload, FALSE, \
-  silc_command_get(cmd->payload), status)
-
-/* Process received command reply. */
-
-void silc_client_command_reply_process(SilcClient client,
-                                      SilcSocketConnection sock,
-                                      SilcPacketContext *packet)
+  SilcClient client = cmd->conn->client;
+  SilcClientConnection conn = cmd->conn;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcID id;
+
+  if (cmd->error == SILC_STATUS_ERR_NO_SUCH_CLIENT_ID) {
+    SilcClientEntry client_entry;
+
+    /* Remove unknown client entry from cache */
+    if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
+      return;
+
+    client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+    if (client_entry) {
+      silc_client_remove_from_channels(client, conn, client_entry);
+      client_entry->internal.valid = FALSE;
+      silc_client_del_client(client, conn, client_entry);
+      silc_client_unref_client(client, conn, client_entry);
+    }
+    return;
+  }
+
+  if (cmd->error == SILC_STATUS_ERR_NO_SUCH_CHANNEL_ID) {
+    SilcChannelEntry channel;
+
+    /* Remove unknown channel entry from cache */
+    if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
+      return;
+
+    channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+    if (channel) {
+      silc_client_empty_channel(client, conn, channel);
+      silc_client_del_channel(client, conn, channel);
+      silc_client_unref_channel(client, conn, channel);
+    }
+    return;
+  }
+
+  if (cmd->error == SILC_STATUS_ERR_NO_SUCH_SERVER_ID) {
+    SilcServerEntry server_entry;
+
+    /* Remove unknown server entry from cache */
+    if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL))
+      return;
+
+    server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
+    if (server_entry) {
+      silc_client_del_server(client, conn, server_entry);
+      silc_client_unref_server(client, conn, server_entry);
+    }
+    return;
+  }
+}
+
+/***************************** Command Reply ********************************/
+
+/* Process received command reply packet */
+
+SILC_FSM_STATE(silc_client_command_reply)
 {
-  SilcBuffer buffer = packet->buffer;
-  SilcClientCommandReplyContext ctx;
+  SilcClientConnection conn = fsm_context;
+  SilcPacket packet = state_context;
+  SilcClientCommandContext cmd;
   SilcCommandPayload payload;
+  SilcCommand command;
+  SilcUInt16 cmd_ident;
 
   /* Get command reply payload from packet */
-  payload = silc_command_payload_parse(buffer);
+  payload = silc_command_payload_parse(silc_buffer_datalen(&packet->buffer));
+  silc_packet_free(packet);
   if (!payload) {
-    /* Silently ignore bad reply packet */
     SILC_LOG_DEBUG(("Bad command reply packet"));
-    return;
+    return SILC_FSM_FINISH;
+  }
+
+  cmd_ident = silc_command_get_ident(payload);
+  command = silc_command_get(payload);
+
+  /* Find the command pending reply */
+  silc_mutex_lock(conn->internal->lock);
+  silc_list_start(conn->internal->pending_commands);
+  while ((cmd = silc_list_get(conn->internal->pending_commands))) {
+    if ((cmd->cmd == command || cmd->cmd == SILC_COMMAND_NONE)
+       && cmd->cmd_ident == cmd_ident) {
+      silc_list_del(conn->internal->pending_commands, cmd);
+      break;
+    }
+  }
+  silc_mutex_unlock(conn->internal->lock);
+
+  if (!cmd) {
+    SILC_LOG_DEBUG(("Unknown command reply %s, ident %d",
+                   silc_get_command_name(command), cmd_ident));
+    silc_command_payload_free(payload);
+    return SILC_FSM_FINISH;
   }
-  
-  /* Allocate command reply context. This must be free'd by the
-     command reply routine receiving it. */
-  ctx = silc_calloc(1, sizeof(*ctx));
-  ctx->client = client;
-  ctx->sock = sock;
-  ctx->payload = payload;
-  ctx->args = silc_command_get_args(ctx->payload);
-  ctx->packet = packet;
-      
-  /* Check for pending commands and mark to be exeucted */
-  SILC_CLIENT_COMMAND_CHECK_PENDING(ctx);
-  
-  /* Execute command reply */
-  SILC_CLIENT_COMMAND_REPLY_EXEC(ctx);
+
+  /* Signal command thread that command reply has arrived.  We continue
+     command reply processing synchronously because we save the command
+     payload into state context.  No other reply may arrive to this command
+     while we're processing this reply. */
+  silc_fsm_set_state_context(&cmd->thread, payload);
+  silc_fsm_next(&cmd->thread, silc_client_command_reply_process);
+  silc_fsm_continue_sync(&cmd->thread);
+
+  return SILC_FSM_FINISH;
 }
 
-/* Returns status message string */
+/* Wait here for command reply to arrive from remote host */
 
-static char *
-silc_client_command_status_message(SilcCommandStatus status)
+SILC_FSM_STATE(silc_client_command_reply_wait)
 {
-  int i;
+  SilcClientCommandContext cmd = fsm_context;
 
-  for (i = 0; silc_command_status_messages[i].message; i++) {
-    if (silc_command_status_messages[i].status == status)
-      break;
+  SILC_LOG_DEBUG(("Wait for command reply"));
+
+  /** Wait for command reply */
+  silc_fsm_set_state_context(fsm, NULL);
+  silc_fsm_next_later(fsm, silc_client_command_reply_timeout,
+                     cmd->cmd != SILC_COMMAND_PING ? 40 : 60, 0);
+  return SILC_FSM_WAIT;
+}
+
+/* Timeout occurred while waiting command reply */
+
+SILC_FSM_STATE(silc_client_command_reply_timeout)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcArgumentPayload args = NULL;
+
+  if (conn->internal->disconnected) {
+    SILC_LOG_DEBUG(("Command %s canceled", silc_get_command_name(cmd->cmd)));
+    silc_list_del(conn->internal->pending_commands, cmd);
+    if (!cmd->called)
+      ERROR_CALLBACK(SILC_STATUS_ERR_TIMEDOUT);
+    return SILC_FSM_FINISH;
   }
 
-  if (silc_command_status_messages[i].message == NULL)
-    return NULL;
+  SILC_LOG_DEBUG(("Command %s timeout", silc_get_command_name(cmd->cmd)));
 
-  return silc_command_status_messages[i].message;
+  /* Timeout, reply not received in timely fashion */
+  silc_list_del(conn->internal->pending_commands, cmd);
+  ERROR_CALLBACK(SILC_STATUS_ERR_TIMEDOUT);
+  return SILC_FSM_FINISH;
 }
 
-/* Free command reply context and its internals. */
+/* Process received command reply payload */
 
-void silc_client_command_reply_free(SilcClientCommandReplyContext cmd)
+SILC_FSM_STATE(silc_client_command_reply_process)
 {
-  if (cmd) {
-    silc_command_free_payload(cmd->payload);
-    silc_free(cmd);
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+
+  silc_command_get_status(payload, &cmd->status, &cmd->error);
+
+  switch (cmd->cmd) {
+  case SILC_COMMAND_WHOIS:
+    /** WHOIS */
+    silc_fsm_next(fsm, silc_client_command_reply_whois);
+    break;
+  case SILC_COMMAND_WHOWAS:
+    /** WHOWAS */
+    silc_fsm_next(fsm, silc_client_command_reply_whowas);
+    break;
+  case SILC_COMMAND_IDENTIFY:
+    /** IDENTIFY */
+    silc_fsm_next(fsm, silc_client_command_reply_identify);
+    break;
+  case SILC_COMMAND_NICK:
+    /** NICK */
+    silc_fsm_next(fsm, silc_client_command_reply_nick);
+    break;
+  case SILC_COMMAND_LIST:
+    /** LIST */
+    silc_fsm_next(fsm, silc_client_command_reply_list);
+    break;
+  case SILC_COMMAND_TOPIC:
+    /** TOPIC */
+    silc_fsm_next(fsm, silc_client_command_reply_topic);
+    break;
+  case SILC_COMMAND_INVITE:
+    /** INVITE */
+    silc_fsm_next(fsm, silc_client_command_reply_invite);
+    break;
+  case SILC_COMMAND_QUIT:
+    /** QUIT */
+    silc_fsm_next(fsm, silc_client_command_reply_quit);
+    break;
+  case SILC_COMMAND_KILL:
+    /** KILL */
+    silc_fsm_next(fsm, silc_client_command_reply_kill);
+    break;
+  case SILC_COMMAND_INFO:
+    /** INFO */
+    silc_fsm_next(fsm, silc_client_command_reply_info);
+    break;
+  case SILC_COMMAND_STATS:
+    /** STATS */
+    silc_fsm_next(fsm, silc_client_command_reply_stats);
+    break;
+  case SILC_COMMAND_PING:
+    /** PING */
+    silc_fsm_next(fsm, silc_client_command_reply_ping);
+    break;
+  case SILC_COMMAND_OPER:
+    /** OPER */
+    silc_fsm_next(fsm, silc_client_command_reply_oper);
+    break;
+  case SILC_COMMAND_JOIN:
+    /** JOIN */
+    silc_fsm_next(fsm, silc_client_command_reply_join);
+    break;
+  case SILC_COMMAND_MOTD:
+    /** MOTD */
+    silc_fsm_next(fsm, silc_client_command_reply_motd);
+    break;
+  case SILC_COMMAND_UMODE:
+    /** UMODE */
+    silc_fsm_next(fsm, silc_client_command_reply_umode);
+    break;
+  case SILC_COMMAND_CMODE:
+    /** CMODE */
+    silc_fsm_next(fsm, silc_client_command_reply_cmode);
+    break;
+  case SILC_COMMAND_CUMODE:
+    /** CUMODE */
+    silc_fsm_next(fsm, silc_client_command_reply_cumode);
+    break;
+  case SILC_COMMAND_KICK:
+    /** KICK */
+    silc_fsm_next(fsm, silc_client_command_reply_kick);
+    break;
+  case SILC_COMMAND_BAN:
+    /** BAN */
+    silc_fsm_next(fsm, silc_client_command_reply_ban);
+    break;
+  case SILC_COMMAND_DETACH:
+    /** DETACH */
+    silc_fsm_next(fsm, silc_client_command_reply_detach);
+    break;
+  case SILC_COMMAND_WATCH:
+    /** WATCH */
+    silc_fsm_next(fsm, silc_client_command_reply_watch);
+    break;
+  case SILC_COMMAND_SILCOPER:
+    /** SILCOPER */
+    silc_fsm_next(fsm, silc_client_command_reply_silcoper);
+    break;
+  case SILC_COMMAND_LEAVE:
+    /** LEAVE */
+    silc_fsm_next(fsm, silc_client_command_reply_leave);
+    break;
+  case SILC_COMMAND_USERS:
+    /** USERS */
+    silc_fsm_next(fsm, silc_client_command_reply_users);
+    break;
+  case SILC_COMMAND_GETKEY:
+    /** GETKEY */
+    silc_fsm_next(fsm, silc_client_command_reply_getkey);
+    break;
+  case SILC_COMMAND_SERVICE:
+    /** SERVICE */
+    silc_fsm_next(fsm, silc_client_command_reply_service);
+    break;
+  default:
+    return SILC_FSM_FINISH;
   }
+
+  return SILC_FSM_CONTINUE;
 }
 
-static void 
-silc_client_command_reply_whois_print(SilcClientCommandReplyContext cmd,
-                                     SilcCommandStatus status)
+/* Completes command reply processing */
+
+SILC_FSM_STATE(silc_client_command_reply_processed)
 {
-  char buf[256];
-  int argc, len;
-  unsigned char *id_data;
-  char *nickname = NULL, *username = NULL;
-  char *realname = NULL;
-  SilcClientID *client_id;
-  SilcIDCacheEntry id_cache = NULL;
-  SilcClientEntry client_entry = NULL;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  
-  memset(buf, 0, sizeof(buf));
-  
-  argc = silc_argument_get_arg_num(cmd->args);
-
-  id_data = silc_argument_get_arg_type(cmd->args, 2, &len);
-  if (!id_data) {
-    COMMAND_REPLY_ERROR;
-    return;
-  }
-  
-  client_id = silc_id_payload_parse_id(id_data, len);
-  
-  nickname = silc_argument_get_arg_type(cmd->args, 3, &len);
-  if (nickname) {
-    strncat(buf, nickname, len);
-    strncat(buf, " is ", 4);
-  }
-  
-  username = silc_argument_get_arg_type(cmd->args, 4, &len);
-  if (username) {
-    strncat(buf, username, len);
-  }
-  
-  realname = silc_argument_get_arg_type(cmd->args, 5, &len);
-  if (realname) {
-    strncat(buf, " (", 2);
-    strncat(buf, realname, len);
-    strncat(buf, ")", 1);
-  }
-  
-  /* Check if we have this client cached already. */
-  if (!silc_idcache_find_by_id_one(conn->client_cache, (void *)client_id,
-                                  SILC_ID_CLIENT, &id_cache)) {
-    client_entry = silc_calloc(1, sizeof(*client_entry));
-    client_entry->id = client_id;
-    silc_parse_nickname(nickname, &client_entry->nickname, 
-                       &client_entry->server, &client_entry->num);
-    client_entry->username = strdup(username);
-    
-    /* Add client to cache */
-    silc_idcache_add(conn->client_cache, client_entry->nickname,
-                    SILC_ID_CLIENT, client_id, (void *)client_entry, TRUE);
-  } else {
-    client_entry = (SilcClientEntry)id_cache->context;
-    silc_free(client_id);
-  }
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcCommandPayload payload = state_context;
 
-  if (!cmd->callback)
-    cmd->client->ops->say(cmd->client, conn, "%s", buf);
+  silc_command_payload_free(payload);
 
-  /* Notify application */
-  COMMAND_REPLY((ARGS, client_entry, nickname, 
-                username, realname, NULL, NULL));
+  if (cmd->status == SILC_STATUS_OK || cmd->status == SILC_STATUS_LIST_END ||
+      SILC_STATUS_IS_ERROR(cmd->status))
+    return SILC_FSM_FINISH;
+
+  /* Add back to pending command reply list */
+  silc_mutex_lock(conn->internal->lock);
+  cmd->resolved = FALSE;
+  silc_list_add(conn->internal->pending_commands, cmd);
+  silc_mutex_unlock(conn->internal->lock);
+
+  /** Wait more command payloads */
+  silc_fsm_next(fsm, silc_client_command_reply_wait);
+  return SILC_FSM_CONTINUE;
 }
 
-/* Received reply for WHOIS command. This maybe called several times
-   for one WHOIS command as server may reply with list of results. */
+/******************************** WHOIS *************************************/
 
-SILC_CLIENT_CMD_REPLY_FUNC(whois)
+/* Received reply for WHOIS command. */
+
+SILC_FSM_STATE(silc_client_command_reply_whois)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  unsigned char *tmp;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry = NULL;
+  SilcUInt32 idle = 0, mode = 0, fingerprint_len, len, *umodes = NULL;
+  SilcBufferStruct channels, ch_user_modes;
+  SilcBool has_channels = FALSE;
+  SilcDList channel_list = NULL;
+  SilcID id;
+  char *nickname = NULL, *username = NULL, *realname = NULL;
+  unsigned char *fingerprint, *tmp;
 
-  SILC_LOG_DEBUG(("Start"));
-
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK && 
-      status != SILC_STATUS_LIST_START &&
-      status != SILC_STATUS_LIST_ITEM &&
-      status != SILC_STATUS_LIST_END) {
-    if (status == SILC_STATUS_ERR_NO_SUCH_NICK) {
-      /* Take nickname which may be provided */
-      tmp = silc_argument_get_arg_type(cmd->args, 3, NULL);
-      if (tmp)
-       cmd->client->ops->say(cmd->client, conn, "%s: %s", tmp,
-                silc_client_command_status_message(status));
-      else
-       cmd->client->ops->say(cmd->client, conn, "%s",
-                silc_client_command_status_message(status));
-      COMMAND_REPLY_ERROR;
-      goto out;
-    } else {
-      cmd->client->ops->say(cmd->client, conn,
-              "%s", silc_client_command_status_message(status));
-      COMMAND_REPLY_ERROR;
+  CHECK_STATUS("WHOIS: ");
+  CHECK_ARGS(5, 11);
+
+  /* Get Client ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get names */
+  nickname = silc_argument_get_arg_type(args, 3, NULL);
+  username = silc_argument_get_arg_type(args, 4, NULL);
+  realname = silc_argument_get_arg_type(args, 5, NULL);
+  if (!nickname || !username || !realname) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get joined channel list */
+  memset(&channels, 0, sizeof(channels));
+  tmp = silc_argument_get_arg_type(args, 6, &len);
+  if (tmp) {
+    has_channels = TRUE;
+    silc_buffer_set(&channels, tmp, len);
+
+    /* Get channel user mode list */
+    tmp = silc_argument_get_arg_type(args, 10, &len);
+    if (!tmp) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
       goto out;
     }
+    silc_buffer_set(&ch_user_modes, tmp, len);
   }
 
-  /* Display one whois reply */
-  if (status == SILC_STATUS_OK) {
-    silc_client_command_reply_whois_print(cmd, status);
-  }
+  /* Get user mode */
+  tmp = silc_argument_get_arg_type(args, 7, &len);
+  if (tmp)
+    SILC_GET32_MSB(mode, tmp);
+
+  /* Get idle time */
+  tmp = silc_argument_get_arg_type(args, 8, &len);
+  if (tmp)
+    SILC_GET32_MSB(idle, tmp);
 
-  /* XXX list should not be displayed untill all items has been received. */
-  if (status == SILC_STATUS_LIST_START) {
-    silc_client_command_reply_whois_print(cmd, status);
+  /* Get fingerprint */
+  fingerprint = silc_argument_get_arg_type(args, 9, &fingerprint_len);
+
+  /* Check if we have this client cached already. */
+  client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+  if (!client_entry) {
+    SILC_LOG_DEBUG(("Adding new client entry (WHOIS)"));
+    client_entry =
+      silc_client_add_client(client, conn, nickname, username, realname,
+                            &id.u.client_id, mode);
+    if (!client_entry) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
+      goto out;
+    }
+    silc_client_ref_client(client, conn, client_entry);
+  } else {
+    silc_client_update_client(client, conn, client_entry,
+                             nickname, username, realname, mode);
   }
 
-  if (status == SILC_STATUS_LIST_ITEM) {
-    silc_client_command_reply_whois_print(cmd, status);
+  silc_rwlock_wrlock(client_entry->internal.lock);
+
+  if (fingerprint && fingerprint_len == sizeof(client_entry->fingerprint))
+    memcpy(client_entry->fingerprint, fingerprint, fingerprint_len);
+
+  /* Get user attributes */
+  tmp = silc_argument_get_arg_type(args, 11, &len);
+  if (tmp) {
+    if (client_entry->attrs)
+      silc_attribute_payload_list_free(client_entry->attrs);
+    client_entry->attrs = silc_attribute_payload_parse(tmp, len);
   }
 
-  if (status == SILC_STATUS_LIST_END) {
-    silc_client_command_reply_whois_print(cmd, status);
+  silc_rwlock_unlock(client_entry->internal.lock);
+
+  /* Parse channel and channel user mode list */
+  if (has_channels) {
+    channel_list = silc_channel_payload_parse_list(silc_buffer_data(&channels),
+                                                  silc_buffer_len(&channels));
+    if (channel_list)
+      silc_get_mode_list(&ch_user_modes, silc_dlist_count(channel_list),
+                        &umodes);
   }
 
-  SILC_CLIENT_COMMAND_EXEC_PENDING(cmd, SILC_COMMAND_WHOIS);
+  /* Notify application */
+  silc_client_command_callback(cmd, client_entry, nickname, username,
+                              realname, channel_list, mode, idle, fingerprint,
+                              umodes, client_entry->attrs);
+
+  silc_client_unref_client(client, conn, client_entry);
+  if (has_channels) {
+    silc_channel_payload_list_free(channel_list);
+    silc_free(umodes);
+  }
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/******************************** WHOWAS ************************************/
+
 /* Received reply for WHOWAS command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(whowas)
+SILC_FSM_STATE(silc_client_command_reply_whowas)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry = NULL;
+  SilcID id;
+  char *nickname, *username;
+  char *realname = NULL;
+
+  CHECK_STATUS("WHOWAS: ");
+  CHECK_ARGS(4, 5);
+
+  /* Get Client ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the client entry */
+  client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
 
+  /* Get names */
+  nickname = silc_argument_get_arg_type(args, 3, NULL);
+  username = silc_argument_get_arg_type(args, 4, NULL);
+  realname = silc_argument_get_arg_type(args, 5, NULL);
+  if (!nickname || !username) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Notify application. We don't save any history information to any
+     cache. Just pass the data to the application. */
+  silc_client_command_callback(cmd, client_entry, nickname, username,
+                              realname);
+
+ out:
+  silc_client_unref_client(client, conn, client_entry);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-/* Received reply for IDENTIFY command. This maybe called several times
-   for one IDENTIFY command as server may reply with list of results. 
-   This is totally silent and does not print anything on screen. */
+/******************************** IDENTIFY **********************************/
+
+/* Received reply for IDENTIFY command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(identify)
+SILC_FSM_STATE(silc_client_command_reply_identify)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
   SilcClientEntry client_entry;
-  SilcCommandStatus status;
-  unsigned char *tmp;
+  SilcServerEntry server_entry;
+  SilcChannelEntry channel_entry;
+  SilcUInt32 len;
+  SilcID id;
+  char *name = NULL, *info = NULL;
+
+  CHECK_STATUS("IDENTIFY: ");
+  CHECK_ARGS(2, 4);
+
+  /* Get the ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
 
-  SILC_LOG_DEBUG(("Start"));
-
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    if (status == SILC_STATUS_ERR_NO_SUCH_NICK) {
-      /* Take nickname which may be provided */
-      tmp = silc_argument_get_arg_type(cmd->args, 3, NULL);
-      if (tmp)
-       cmd->client->ops->say(cmd->client, conn, "%s: %s", tmp,
-                silc_client_command_status_message(status));
-      else
-       cmd->client->ops->say(cmd->client, conn, "%s",
-                silc_client_command_status_message(status));
-      COMMAND_REPLY_ERROR;
-      goto out;
+  /* Get names */
+  name = silc_argument_get_arg_type(args, 3, &len);
+  info = silc_argument_get_arg_type(args, 4, &len);
+
+  switch (id.type) {
+  case SILC_ID_CLIENT:
+    SILC_LOG_DEBUG(("Received client information"));
+
+    /* Check if we have this client cached already. */
+    client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+    if (!client_entry) {
+      SILC_LOG_DEBUG(("Adding new client entry (IDENTIFY)"));
+      client_entry =
+       silc_client_add_client(client, conn, name, info, NULL,
+                              &id.u.client_id, 0);
+      if (!client_entry) {
+       ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
+       goto out;
+      }
+      silc_client_ref_client(client, conn, client_entry);
     } else {
-      cmd->client->ops->say(cmd->client, conn,
-              "%s", silc_client_command_status_message(status));
-      COMMAND_REPLY_ERROR;
-      goto out;
+      silc_client_update_client(client, conn, client_entry,
+                               name, info, NULL, 0);
     }
-  }
 
-  /* Display one whois reply */
-  if (status == SILC_STATUS_OK) {
-    unsigned int len;
-    unsigned char *id_data;
-    char *nickname;
-    char *username;
+    /* Notify application */
+    silc_client_command_callback(cmd, client_entry, name, info);
+    silc_client_unref_client(client, conn, client_entry);
+    break;
+
+  case SILC_ID_SERVER:
+    SILC_LOG_DEBUG(("Received server information"));
+
+    /* Check if we have this server cached already. */
+    server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
+    if (!server_entry) {
+      SILC_LOG_DEBUG(("Adding new server entry (IDENTIFY)"));
+      server_entry = silc_client_add_server(client, conn, name, info,
+                                           &id.u.server_id);
+      if (!server_entry) {
+       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+       goto out;
+      }
+      silc_client_ref_server(client, conn, server_entry);
+    } else {
+      silc_client_update_server(client, conn, server_entry, name, info);
+    }
+    server_entry->internal.resolve_cmd_ident = 0;
+
+    /* Notify application */
+    silc_client_command_callback(cmd, server_entry, name, info);
+    silc_client_unref_server(client, conn, server_entry);
+    break;
+
+  case SILC_ID_CHANNEL:
+    SILC_LOG_DEBUG(("Received channel information"));
+
+    /* Check if we have this channel cached already. */
+    channel_entry = silc_client_get_channel_by_id(client, conn,
+                                                 &id.u.channel_id);
+    if (!channel_entry) {
+      SILC_LOG_DEBUG(("Adding new channel entry (IDENTIFY)"));
 
-    id_data = silc_argument_get_arg_type(cmd->args, 2, &len);
-    nickname = silc_argument_get_arg_type(cmd->args, 3, NULL);
-    username = silc_argument_get_arg_type(cmd->args, 4, NULL);
+      if (!name) {
+       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+       goto out;
+      }
 
-    /* Allocate client entry */
-    client_entry = silc_calloc(1, sizeof(*client_entry));
-    client_entry->id = silc_id_payload_parse_id(id_data, len);
-    if (nickname)
-      silc_parse_nickname(nickname, &client_entry->nickname, 
-                         &client_entry->server, &client_entry->num);
-    if (username)
-      client_entry->username = strdup(username);
+      /* Add new channel entry */
+      channel_entry = silc_client_add_channel(client, conn, name, 0,
+                                             &id.u.channel_id);
+      if (!channel_entry) {
+       ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+       goto out;
+      }
+      silc_client_ref_channel(client, conn, channel_entry);
+    }
 
-    /* Save received Client ID to ID cache */
-    silc_idcache_add(conn->client_cache, client_entry->nickname,
-                    SILC_ID_CLIENT, client_entry->id, client_entry, TRUE);
+    /* Notify application */
+    silc_client_command_callback(cmd, channel_entry,
+                                channel_entry->channel_name, info);
+    silc_client_unref_channel(client, conn, channel_entry);
+    break;
   }
 
-  if (status == SILC_STATUS_LIST_START) {
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
+
+/********************************** NICK ************************************/
+
+/* Received reply for command NICK. */
+
+SILC_FSM_STATE(silc_client_command_reply_nick)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  unsigned char *nick, *idp;
+  SilcUInt32 len, idp_len;
+  SilcClientID old_client_id;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot set nickname: ");
+  CHECK_ARGS(2, 3);
+
+  /* Take received Client ID */
+  idp = silc_argument_get_arg_type(args, 2, &idp_len);
+  if (!idp) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+  if (!silc_id_payload_parse_id(idp, idp_len, &id)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
 
+  /* Take the new nickname */
+  nick = silc_argument_get_arg_type(args, 3, &len);
+  if (!nick) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
   }
 
-  if (status == SILC_STATUS_LIST_END) {
+  silc_rwlock_wrlock(conn->local_entry->internal.lock);
 
+  /* Change the nickname */
+  old_client_id = *conn->local_id;
+  if (!silc_client_change_nickname(client, conn, conn->local_entry,
+                                  nick, &id.u.client_id, idp, idp_len)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_BAD_NICKNAME);
+    silc_rwlock_unlock(conn->local_entry->internal.lock);
+    goto out;
   }
 
-  SILC_CLIENT_COMMAND_EXEC_PENDING(cmd, SILC_COMMAND_IDENTIFY);
+  silc_rwlock_unlock(conn->local_entry->internal.lock);
+
+  /* Notify application */
+  silc_client_command_callback(cmd, conn->local_entry,
+                              conn->local_entry->nickname, &old_client_id);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-/* Received reply for command NICK. If everything went without errors
-   we just received our new Client ID. */
+/********************************** LIST ************************************/
+
+/* Received reply to the LIST command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(nick)
+SILC_FSM_STATE(silc_client_command_reply_list)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  SilcIDPayload idp;
-  unsigned char *tmp;
-  unsigned int argc, len;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  unsigned char *tmp, *name, *topic;
+  SilcUInt32 usercount = 0;
+  SilcChannelEntry channel_entry = NULL;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot list channels: ");
+
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    /* There were no channels in the network. */
+    silc_client_command_callback(cmd, NULL, NULL, NULL, 0);
+    silc_fsm_next(fsm, silc_client_command_reply_processed);
+    return SILC_FSM_CONTINUE;
+  }
 
-  SILC_LOG_DEBUG(("Start"));
+  CHECK_ARGS(3, 5);
 
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn, "Cannot set nickname: %s", 
-            silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  name = silc_argument_get_arg_type(args, 3, NULL);
+  if (!name) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
-  argc = silc_argument_get_arg_num(cmd->args);
-  if (argc < 2 || argc > 2) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot set nickname: bad reply to command");
-    COMMAND_REPLY_ERROR;
-    goto out;
+  topic = silc_argument_get_arg_type(args, 4, NULL);
+  tmp = silc_argument_get_arg_type(args, 5, NULL);
+  if (tmp)
+    SILC_GET32_MSB(usercount, tmp);
+
+  /* Check whether the channel exists, and add it to cache if it doesn't. */
+  channel_entry = silc_client_get_channel_by_id(client, conn,
+                                               &id.u.channel_id);
+  if (!channel_entry) {
+    /* Add new channel entry */
+    channel_entry = silc_client_add_channel(client, conn, name, 0,
+                                           &id.u.channel_id);
+    if (!channel_entry) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+      goto out;
+    }
+    silc_client_ref_channel(client, conn, channel_entry);
   }
 
-  /* Take received Client ID */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, &len);
-  idp = silc_id_payload_parse_data(tmp, len);
-  silc_client_receive_new_id(cmd->client, cmd->sock, idp);
-    
   /* Notify application */
-  COMMAND_REPLY((ARGS, conn->local_entry));
+  silc_client_command_callback(cmd, channel_entry, channel_entry->channel_name,
+                              topic, usercount);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_client_unref_channel(client, conn, channel_entry);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(list)
-{
-}
+/********************************* TOPIC ************************************/
 
 /* Received reply to topic command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(topic)
+SILC_FSM_STATE(silc_client_command_reply_topic)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  SilcChannelEntry channel;
-  SilcChannelID *channel_id = NULL;
-  SilcIDCacheEntry id_cache = NULL;
-  unsigned char *tmp;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcChannelEntry channel = NULL;
   char *topic;
-  unsigned int argc, len;
-
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
-    silc_client_command_reply_free(cmd);
-    return;
-  }
+  SilcUInt32 len;
+  SilcID id;
 
-  argc = silc_argument_get_arg_num(cmd->args);
-  if (argc < 1 || argc > 3) {
-    COMMAND_REPLY_ERROR;
-    goto out;
-  }
+  /* Sanity checks */
+  CHECK_STATUS("Cannot set topic: ");
+  CHECK_ARGS(2, 3);
 
   /* Take Channel ID */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, &len);
-  if (!tmp)
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
+  }
 
-  /* Take topic */
-  topic = silc_argument_get_arg_type(cmd->args, 3, NULL);
-  if (!topic)
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
+  }
 
-  channel_id = silc_id_payload_parse_id(tmp, len);
+  silc_rwlock_wrlock(channel->internal.lock);
 
-  /* Get the channel name */
-  if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
-                                  SILC_ID_CHANNEL, &id_cache)) {
-    silc_free(channel_id);
-    COMMAND_REPLY_ERROR;
-    goto out;
+  /* Take topic */
+  topic = silc_argument_get_arg_type(args, 3, &len);
+  if (topic) {
+    silc_free(channel->topic);
+    channel->topic = silc_memdup(topic, len);
   }
-  
-  channel = (SilcChannelEntry)id_cache->context;
 
-  cmd->client->ops->say(cmd->client, conn, 
-                       "Topic on channel %s: %s", channel->channel_name,
-                       topic);
+  silc_rwlock_unlock(channel->internal.lock);
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, channel, topic));
+  silc_client_command_callback(cmd, channel, channel->topic);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/********************************* INVITE ***********************************/
+
 /* Received reply to invite command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(invite)
+SILC_FSM_STATE(silc_client_command_reply_invite)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcChannelEntry channel = NULL;
   unsigned char *tmp;
+  SilcUInt32 len;
+  SilcArgumentPayload invite_args = NULL;
+  SilcID id;
 
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
-    silc_client_command_reply_free(cmd);
-    return;
+  /* Sanity checks */
+  CHECK_STATUS("Cannot invite: ");
+  CHECK_ARGS(2, 3);
+
+  /* Take Channel ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
   }
 
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the invite list */
+  tmp = silc_argument_get_arg_type(args, 3, &len);
+  if (tmp)
+    invite_args = silc_argument_list_parse(tmp, len);
+
   /* Notify application */
-  COMMAND_REPLY((ARGS));
+  silc_client_command_callback(cmd, channel, invite_args);
 
-  silc_client_command_reply_free(cmd);
-}
-SILC_CLIENT_CMD_REPLY_FUNC(quit)
-{
+  if (invite_args)
+    silc_argument_payload_free(invite_args);
+
+ out:
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(kill)
+/********************************** KILL ************************************/
+
+/* Received reply to the KILL command. */
+
+SILC_FSM_STATE(silc_client_command_reply_kill)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot kill: ");
+  CHECK_ARGS(2, 2);
+
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the client entry, if exists */
+  client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+
+  /* Notify application */
+  silc_client_command_callback(cmd, client_entry);
+
+  /* Remove the client */
+  if (client_entry) {
+    silc_client_remove_from_channels(client, conn, client_entry);
+    client_entry->internal.valid = FALSE;
+    silc_client_del_client(client, conn, client_entry);
+    silc_client_unref_client(client, conn, client_entry);
+  }
+
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/********************************** INFO ************************************/
+
 /* Received reply to INFO command. We receive the server ID and some
    information about the server user requested. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(info)
+SILC_FSM_STATE(silc_client_command_reply_info)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcClient client = cmd->client;
-  SilcCommandStatus status;
-  unsigned char *tmp;
-
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
-    silc_client_command_reply_free(cmd);
-    return;
-  }
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcServerEntry server;
+  char *server_name, *server_info;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get info: ");
+  CHECK_ARGS(4, 4);
 
   /* Get server ID */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, NULL);
-  if (!tmp)
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
+  }
 
-  /* XXX save server id */
+  /* Get server name */
+  server_name = silc_argument_get_arg_type(args, 3, NULL);
+  if (!server_name) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
 
   /* Get server info */
-  tmp = silc_argument_get_arg_type(cmd->args, 3, NULL);
-  if (!tmp)
+  server_info = silc_argument_get_arg_type(args, 4, NULL);
+  if (!server_info) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
+  }
 
-  client->ops->say(cmd->client, conn, "Info: %s", tmp);
+  /* See whether we have this server cached. If not create it. */
+  server = silc_client_get_server_by_id(client, conn, &id.u.server_id);
+  if (!server) {
+    SILC_LOG_DEBUG(("Add new server entry (INFO)"));
+    server = silc_client_add_server(client, conn, server_name,
+                                   server_info, &id.u.server_id);
+    if (!server)
+      goto out;
+    silc_client_ref_server(client, conn, server);
+  }
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, NULL, (char *)tmp));
+  silc_client_command_callback(cmd, server, server->server_name,
+                              server->server_info);
+  silc_client_unref_server(client, conn, server);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(connect)
-{
-}
+/********************************** STATS ***********************************/
 
-/* Received reply to PING command. The reply time is shown to user. */
+/* Received reply to STATS command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(ping)
+SILC_FSM_STATE(silc_client_command_reply_stats)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  void *id;
-  int i;
-  time_t diff, curtime;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientStats stats;
+  unsigned char *buf = NULL;
+  SilcUInt32 buf_len = 0;
+  SilcBufferStruct b;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get stats: ");
+  CHECK_ARGS(2, 3);
 
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  /* Get server ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
-  curtime = time(NULL);
-  id = silc_id_str2id(cmd->packet->src_id, cmd->packet->src_id_type);
+  /* Get statistics structure */
+  memset(&stats, 0, sizeof(stats));
+  buf = silc_argument_get_arg_type(args, 3, &buf_len);
+  if (buf) {
+    silc_buffer_set(&b, buf, buf_len);
+    silc_buffer_unformat(&b,
+                        SILC_STR_UI_INT(&stats.starttime),
+                        SILC_STR_UI_INT(&stats.uptime),
+                        SILC_STR_UI_INT(&stats.my_clients),
+                        SILC_STR_UI_INT(&stats.my_channels),
+                        SILC_STR_UI_INT(&stats.my_server_ops),
+                        SILC_STR_UI_INT(&stats.my_router_ops),
+                        SILC_STR_UI_INT(&stats.cell_clients),
+                        SILC_STR_UI_INT(&stats.cell_channels),
+                        SILC_STR_UI_INT(&stats.cell_servers),
+                        SILC_STR_UI_INT(&stats.clients),
+                        SILC_STR_UI_INT(&stats.channels),
+                        SILC_STR_UI_INT(&stats.servers),
+                        SILC_STR_UI_INT(&stats.routers),
+                        SILC_STR_UI_INT(&stats.server_ops),
+                        SILC_STR_UI_INT(&stats.router_ops),
+                        SILC_STR_END);
+  }
 
-  for (i = 0; i < conn->ping_count; i++) {
-    if (!SILC_ID_SERVER_COMPARE(conn->ping[i].dest_id, id)) {
-      diff = curtime - conn->ping[i].start_time;
-      cmd->client->ops->say(cmd->client, conn, 
-                           "Ping reply from %s: %d second%s", 
-                           conn->ping[i].dest_name, diff, 
-                           diff == 1 ? "" : "s");
+  /* Notify application */
+  silc_client_command_callback(cmd, &stats);
 
-      conn->ping[i].start_time = 0;
-      silc_free(conn->ping[i].dest_id);
-      conn->ping[i].dest_id = NULL;
-      silc_free(conn->ping[i].dest_name);
-      conn->ping[i].dest_name = NULL;
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
 
-      /* Notify application */
-      COMMAND_REPLY((ARGS));
-      break;
-    }
-  }
+/********************************** PING ************************************/
 
-  silc_free(id);
+/* Received reply to PING command. */
 
- out:
-  silc_client_command_reply_free(cmd);
+SILC_FSM_STATE(silc_client_command_reply_ping)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcInt64 diff;
+
+  diff = silc_time() - SILC_PTR_TO_64(cmd->context);
+  if (cmd->verbose)
+    SAY(client, conn, SILC_CLIENT_MESSAGE_INFO,
+       "Ping reply from %s: %d second%s", conn->remote_host,
+       (int)diff, diff == 1 ? "" : "s");
+
+  /* Notify application */
+  silc_client_command_callback(cmd);
+
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(oper)
+/********************************** JOIN ************************************/
+
+/* Continue JOIN command reply processing after resolving unknown users */
+
+static void
+silc_client_command_reply_join_resolved(SilcClient client,
+                                       SilcClientConnection conn,
+                                       SilcStatus status,
+                                       SilcDList clients,
+                                       void *context)
 {
+  SilcClientCommandContext cmd = context;
+  SilcChannelEntry channel = cmd->context;
+  SilcCommandPayload payload = silc_fsm_get_state_context(&cmd->thread);
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcUInt32 list_count;
+  unsigned char *tmp;
+  char msg[512];
+
+  if (!clients) {
+    silc_snprintf(msg, sizeof(msg), "Error resolving channel %s user list",
+                 channel->channel_name);
+    SAY(client, conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR, msg);
+  } else {
+    tmp = silc_argument_get_arg_type(args, 12, NULL);
+    if (tmp) {
+      SILC_GET32_MSB(list_count, tmp);
+      if (list_count - silc_dlist_count(clients) > 5) {
+       silc_snprintf(msg, sizeof(msg),
+                     "Channel %s user list was not fully resolved. "
+                     "The channel may not be fully synced.",
+                     channel->channel_name);
+       SAY(client, conn, SILC_CLIENT_MESSAGE_WARNING, msg);
+      }
+    }
+  }
+
+  channel->internal.resolve_cmd_ident = 0;
+  silc_client_unref_channel(client, conn, channel);
+
+  SILC_FSM_CALL_CONTINUE_SYNC(&cmd->thread);
 }
 
+
 /* Received reply for JOIN command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(join)
+SILC_FSM_STATE(silc_client_command_reply_join)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcClient client = cmd->client;
-  SilcCommandStatus status;
-  SilcIDPayload idp;
-  unsigned int argc, mode, len;
-  char *topic, *tmp, *channel_name;
-
-  SILC_LOG_DEBUG(("Start"));
-
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcChannelEntry channel;
+  SilcUInt32 mode = 0, len, list_count;
+  char *topic, *tmp, *channel_name = NULL, *hmac;
+  const char *cipher;
+  SilcBufferStruct client_id_list, client_mode_list, keyp;
+  SilcHashTableList htl;
+  SilcID id;
+  int i;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot join channel: ");
+  CHECK_ARGS(9, 17);
+
+  /* Get channel name */
+  channel_name = silc_argument_get_arg_type(args, 2, NULL);
+  if (!channel_name) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
-  argc = silc_argument_get_arg_num(cmd->args);
-  if (argc < 3 || argc > 5) {
-    cmd->client->ops->say(cmd->client, conn,
-            "Cannot join channel: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+  /* Get Channel ID */
+  if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
-  /* Get channel name */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, NULL);
+  /* Check whether we have this channel entry already. */
+  channel = silc_client_get_channel(client, conn, channel_name);
+  if (channel) {
+    if (!SILC_ID_CHANNEL_COMPARE(&channel->id, &id.u.channel_id))
+      silc_client_replace_channel_id(client, conn, channel, &id.u.channel_id);
+  } else {
+    /* Create new channel entry */
+    channel = silc_client_add_channel(client, conn, channel_name,
+                                     mode, &id.u.channel_id);
+    if (!channel) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_BAD_CHANNEL);
+      goto out;
+    }
+    silc_client_ref_channel(client, conn, channel);
+  }
+
+  /* Get the list count */
+  tmp = silc_argument_get_arg_type(args, 12, &len);
+  if (!tmp || len != 4) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+  SILC_GET32_MSB(list_count, tmp);
+
+  /* Get Client ID list */
+  tmp = silc_argument_get_arg_type(args, 13, &len);
   if (!tmp) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot join channel: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-  channel_name = strdup(tmp);
+  silc_buffer_set(&client_id_list, tmp, len);
+
+  /* Resolve users we do not know about */
+  if (!cmd->resolved) {
+    cmd->resolved = TRUE;
+    cmd->context = channel;
+    SILC_FSM_CALL(channel->internal.resolve_cmd_ident =
+                 silc_client_get_clients_by_list(
+                         client, conn, list_count, &client_id_list,
+                         silc_client_command_reply_join_resolved, cmd));
+    /* NOT REACHED */
+  }
 
-  /* Get Channel ID */
-  tmp = silc_argument_get_arg_type(cmd->args, 3, &len);
+  /* Get client mode list */
+  tmp = silc_argument_get_arg_type(args, 14, &len);
   if (!tmp) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot join channel: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-  idp = silc_id_payload_parse_data(tmp, len);
+  silc_buffer_set(&client_mode_list, tmp, len);
+
+  silc_rwlock_wrlock(channel->internal.lock);
+
+  /* Add clients we received in the reply to the channel */
+  for (i = 0; i < list_count; i++) {
+    SilcUInt16 idp_len;
+    SilcID id;
+    SilcClientEntry client_entry;
+
+    /* Client ID */
+    SILC_GET16_MSB(idp_len, client_id_list.data + 2);
+    idp_len += 4;
+    if (!silc_id_payload_parse_id(client_id_list.data, idp_len, &id))
+      continue;
+
+    /* Mode */
+    SILC_GET32_MSB(mode, client_mode_list.data);
+
+    /* Get client entry */
+    client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+    if (client_entry && client_entry->internal.valid) {
+      /* Join client to the channel */
+      silc_rwlock_wrlock(client_entry->internal.lock);
+      silc_client_add_to_channel(client, conn, channel, client_entry, mode);
+      silc_rwlock_unlock(client_entry->internal.lock);
+    }
+    silc_client_unref_client(client, conn, client_entry);
+
+    if (!silc_buffer_pull(&client_id_list, idp_len)) {
+      silc_rwlock_unlock(channel->internal.lock);
+      goto out;
+    }
+    if (!silc_buffer_pull(&client_mode_list, 4)) {
+      silc_rwlock_unlock(channel->internal.lock);
+      goto out;
+    }
+  }
+
+  /* Get hmac */
+  hmac = silc_argument_get_arg_type(args, 11, NULL);
+  if (hmac) {
+    if (!silc_hmac_alloc(hmac, NULL, &channel->internal.hmac)) {
+      if (cmd->verbose)
+       SAY(client, conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR,
+           "Cannot join channel: Unsupported HMAC `%s'", hmac);
+      ERROR_CALLBACK(SILC_STATUS_ERR_UNKNOWN_ALGORITHM);
+      silc_rwlock_unlock(channel->internal.lock);
+      goto out;
+    }
+  }
 
   /* Get channel mode */
-  tmp = silc_argument_get_arg_type(cmd->args, 4, NULL);
-  if (tmp)
+  tmp = silc_argument_get_arg_type(args, 5, &len);
+  if (tmp && len == 4)
     SILC_GET32_MSB(mode, tmp);
-  else
-    mode = 0;
+  channel->mode = mode;
+
+  /* Get channel key and save it */
+  tmp = silc_argument_get_arg_type(args, 7, &len);
+  if (tmp) {
+    /* If channel key already exists on the channel then while resolving
+       the user list we have already received new key from server.  Don't
+       replace it with this old key. */
+    if (!channel->internal.send_key) {
+      silc_buffer_set(&keyp, tmp, len);
+      silc_client_save_channel_key(client, conn, &keyp, channel);
+    }
+  }
 
   /* Get topic */
-  topic = silc_argument_get_arg_type(cmd->args, 5, NULL);
+  topic = silc_argument_get_arg_type(args, 10, NULL);
+  if (topic) {
+    silc_free(channel->topic);
+    channel->topic = silc_memdup(topic, strlen(topic));
+  }
 
-  /* Save received Channel ID */
-  silc_client_new_channel_id(cmd->client, cmd->sock, channel_name, 
-                            mode, idp);
-  silc_id_payload_free(idp);
+  /* Get founder key */
+  tmp = silc_argument_get_arg_type(args, 15, &len);
+  if (tmp) {
+    if (channel->founder_key)
+      silc_pkcs_public_key_free(channel->founder_key);
+    channel->founder_key = NULL;
+    silc_public_key_payload_decode(tmp, len, &channel->founder_key);
+  }
 
-  if (topic)
-    client->ops->say(cmd->client, conn, 
-                    "Topic for %s: %s", channel_name, topic);
+  /* Get user limit */
+  tmp = silc_argument_get_arg_type(args, 17, &len);
+  if (tmp && len == 4)
+    SILC_GET32_MSB(channel->user_limit, tmp);
+  if (!(channel->mode & SILC_CHANNEL_MODE_ULIMIT))
+    channel->user_limit = 0;
+
+  /* Get channel public key list */
+  tmp = silc_argument_get_arg_type(args, 16, &len);
+  if (tmp)
+    silc_client_channel_save_public_keys(channel, tmp, len, FALSE);
+
+  /* Set current channel */
+  conn->current_channel = channel;
+
+  silc_rwlock_unlock(channel->internal.lock);
+
+  cipher = (channel->internal.send_key ?
+           silc_cipher_get_name(channel->internal.send_key) : NULL);
+  silc_hash_table_list(channel->user_list, &htl);
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, channel_name, conn->current_channel, mode,
-                NULL, NULL, topic));
+  silc_client_command_callback(cmd, channel->channel_name, channel, mode, &htl,
+                              topic, cipher, hmac, channel->founder_key,
+                              channel->channel_pubkeys, channel->user_limit);
+
+  silc_hash_table_list_reset(&htl);
+  silc_client_unref_channel(client, conn, channel);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/********************************** MOTD ************************************/
+
 /* Received reply for MOTD command */
 
-SILC_CLIENT_CMD_REPLY_FUNC(motd)
+SILC_FSM_STATE(silc_client_command_reply_motd)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  unsigned int argc, i;
-  unsigned char *tmp;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcUInt32 i;
   char *motd = NULL, *cp, line[256];
 
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
-    return;
-  }
-
-  argc = silc_argument_get_arg_num(cmd->args);
-  if (argc > 2) {
-    COMMAND_REPLY_ERROR;
-    goto out;
-  }
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get motd: ");
+  CHECK_ARGS(2, 3);
 
-  if (argc == 2) {
-    motd = silc_argument_get_arg_type(cmd->args, 2, NULL);
+  if (silc_argument_get_arg_num(args) == 3) {
+    motd = silc_argument_get_arg_type(args, 3, NULL);
     if (!motd) {
-      COMMAND_REPLY_ERROR;
+      ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
       goto out;
     }
 
@@ -755,14 +1378,15 @@ SILC_CLIENT_CMD_REPLY_FUNC(motd)
     while(cp[i] != 0) {
       if (cp[i++] == '\n') {
        memset(line, 0, sizeof(line));
-       strncat(line, cp, i - 1);
+       silc_strncat(line, sizeof(line), cp, i - 1);
        cp += i;
-       
+
        if (i == 2)
          line[0] = ' ';
-       
-       cmd->client->ops->say(cmd->client, conn, "%s", line);
-       
+
+       if (cmd->verbose)
+         SAY(client, conn, SILC_CLIENT_MESSAGE_INFO, "%s", line);
+
        if (!strlen(cp))
          break;
        i = 0;
@@ -771,375 +1395,781 @@ SILC_CLIENT_CMD_REPLY_FUNC(motd)
   }
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, motd));
+  silc_client_command_callback(cmd, motd);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(umode)
+/********************************** UMODE ***********************************/
+
+/* Received reply to the UMODE command. Save the current user mode */
+
+SILC_FSM_STATE(silc_client_command_reply_umode)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  unsigned char *tmp;
+  SilcUInt32 mode, len;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot change mode: ");
+  CHECK_ARGS(2, 2);
+
+  tmp = silc_argument_get_arg_type(args, 2, &len);
+  if (!tmp || len != 4) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  SILC_GET32_MSB(mode, tmp);
+  silc_rwlock_wrlock(conn->local_entry->internal.lock);
+  conn->local_entry->mode = mode;
+  silc_rwlock_unlock(conn->local_entry->internal.lock);
+
+  /* Notify application */
+  silc_client_command_callback(cmd, mode);
+
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/********************************** CMODE ***********************************/
+
 /* Received reply for CMODE command. */
 
-SILC_CLIENT_CMD_REPLY_FUNC(cmode)
+SILC_FSM_STATE(silc_client_command_reply_cmode)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
   unsigned char *tmp;
+  SilcUInt32 mode;
+  SilcChannelEntry channel = NULL;
+  SilcUInt32 len;
+  SilcPublicKey public_key = NULL;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot change mode: ");
+  CHECK_ARGS(3, 6);
 
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  /* Take Channel ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get founder public key */
+  tmp = silc_argument_get_arg_type(args, 4, &len);
+  if (tmp)
+    silc_public_key_payload_decode(tmp, len, &public_key);
+
   /* Get channel mode */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, NULL);
-  if (!tmp) {
-    COMMAND_REPLY_ERROR;
+  tmp = silc_argument_get_arg_type(args, 3, &len);
+  if (!tmp || len != 4) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
+  SILC_GET32_MSB(mode, tmp);
+
+  silc_rwlock_wrlock(channel->internal.lock);
+
+  /* Get user limit */
+  tmp = silc_argument_get_arg_type(args, 6, &len);
+  if (tmp && len == 4)
+    SILC_GET32_MSB(channel->user_limit, tmp);
+  if (!(channel->mode & SILC_CHANNEL_MODE_ULIMIT))
+    channel->user_limit = 0;
+
+  /* Get channel public key(s) */
+  tmp = silc_argument_get_arg_type(args, 5, &len);
+  if (tmp)
+    silc_client_channel_save_public_keys(channel, tmp, len, FALSE);
+  else if (channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH)
+    silc_client_channel_save_public_keys(channel, NULL, 0, TRUE);
+
+  /* Save the mode */
+  channel->mode = mode;
+
+  silc_rwlock_unlock(channel->internal.lock);
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, tmp));
+  silc_client_command_callback(cmd, channel, mode, public_key,
+                              channel->channel_pubkeys, channel->user_limit);
+
+  silc_rwlock_wrlock(channel->internal.lock);
+
+  /* If founder key changed, update it */
+  if (public_key &&
+      (!channel->founder_key ||
+       !silc_pkcs_public_key_compare(public_key, channel->founder_key))) {
+    if (channel->founder_key)
+      silc_pkcs_public_key_free(channel->founder_key);
+    channel->founder_key = public_key;
+    public_key = NULL;
+  }
+
+  silc_rwlock_unlock(channel->internal.lock);
 
  out:
-  silc_client_command_reply_free(cmd);
+  silc_client_unref_channel(client, conn, channel);
+  if (public_key)
+    silc_pkcs_public_key_free(public_key);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
+/********************************** CUMODE **********************************/
+
 /* Received reply for CUMODE command */
 
-SILC_CLIENT_CMD_REPLY_FUNC(cumode)
+SILC_FSM_STATE(silc_client_command_reply_cumode)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  SilcIDCacheEntry id_cache = NULL;
-  SilcClientID *client_id;
-  unsigned char *tmp, *id;
-  unsigned int len;
-  
-  SILC_GET16_MSB(status, silc_argument_get_arg_type(cmd->args, 1, NULL));
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry;
+  SilcChannelEntry channel = NULL;
+  SilcChannelUser chu;
+  unsigned char *modev;
+  SilcUInt32 len, mode;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot change mode: ");
+  CHECK_ARGS(4, 4);
+
+  /* Get channel mode */
+  modev = silc_argument_get_arg_type(args, 2, &len);
+  if (!modev || len != 4) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-  
-  /* Get channel mode */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, NULL);
-  if (!tmp) {
-    COMMAND_REPLY_ERROR;
+  SILC_GET32_MSB(mode, modev);
+
+  /* Take Channel ID */
+  if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
   /* Get Client ID */
-  id = silc_argument_get_arg_type(cmd->args, 3, &len);
-  if (!id) {
-    COMMAND_REPLY_ERROR;
+  if (!silc_argument_get_decoded(args, 4, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-  client_id = silc_id_payload_parse_id(id, len);
-  
+
   /* Get client entry */
-  if (!silc_idcache_find_by_id_one(conn->client_cache, (void *)client_id,
-                                  SILC_ID_CLIENT, &id_cache)) {
-    COMMAND_REPLY_ERROR;
+  client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+  if (!client_entry) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
+  /* Save the mode */
+  silc_rwlock_wrlock(channel->internal.lock);
+  chu = silc_client_on_channel(channel, client_entry);
+  if (chu)
+    chu->mode = mode;
+  silc_rwlock_unlock(channel->internal.lock);
+
   /* Notify application */
-  COMMAND_REPLY((ARGS, tmp, (SilcClientEntry)id_cache->context));
-  silc_free(client_id);
-  
+  silc_client_command_callback(cmd, mode, channel, client_entry);
+
+  silc_client_unref_client(client, conn, client_entry);
+
  out:
-  silc_client_command_reply_free(cmd);
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(kick)
+/********************************** KICK ************************************/
+
+SILC_FSM_STATE(silc_client_command_reply_kick)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry;
+  SilcChannelEntry channel = NULL;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot kick: ");
+  CHECK_ARGS(3, 3);
+
+  /* Take Channel ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get Client ID */
+  if (!silc_argument_get_decoded(args, 3, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get client entry */
+  client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+  if (!client_entry) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Notify application */
+  silc_client_command_callback(cmd, channel, client_entry);
+
+  silc_client_unref_client(client, conn, client_entry);
+
+ out:
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-SILC_CLIENT_CMD_REPLY_FUNC(restart)
+/******************************** SILCOPER **********************************/
+
+SILC_FSM_STATE(silc_client_command_reply_silcoper)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot change mode: ");
+  CHECK_ARGS(1, 1);
+
+  /* Set user mode */
+  cmd->conn->local_entry->mode |= SILC_UMODE_ROUTER_OPERATOR;
+
+  /* Notify application */
+  silc_client_command_callback(cmd);
+
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
-SILC_CLIENT_CMD_REPLY_FUNC(close)
+
+/********************************** OPER ************************************/
+
+SILC_FSM_STATE(silc_client_command_reply_oper)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot change mode: ");
+  CHECK_ARGS(1, 1);
+
+  /* Set user mode */
+  cmd->conn->local_entry->mode |= SILC_UMODE_SERVER_OPERATOR;
+
+  /* Notify application */
+  silc_client_command_callback(cmd);
+
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
-SILC_CLIENT_CMD_REPLY_FUNC(die)
+
+/********************************* DETACH ***********************************/
+
+SILC_FSM_STATE(silc_client_command_reply_detach)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcBuffer detach;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot detach: ");
+  CHECK_ARGS(1, 1);
+
+  /* Get detachment data */
+  detach = silc_client_get_detach_data(client, conn);
+  if (!detach) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_RESOURCE_LIMIT);
+    goto out;
+  }
+
+  /* Notify application */
+  silc_client_command_callback(cmd, detach);
+  silc_buffer_free(detach);
+
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
-SILC_CLIENT_CMD_REPLY_FUNC(silcoper)
+
+/********************************** WATCH ***********************************/
+
+SILC_FSM_STATE(silc_client_command_reply_watch)
 {
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot set watch: ");
+  CHECK_ARGS(1, 1);
+
+  /* Notify application */
+  silc_client_command_callback(cmd);
+
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-/* Reply to LEAVE command. */
+/*********************************** BAN ************************************/
 
-SILC_CLIENT_CMD_REPLY_FUNC(leave)
+SILC_FSM_STATE(silc_client_command_reply_ban)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcChannelEntry channel = NULL;
   unsigned char *tmp;
+  SilcUInt32 len;
+  SilcArgumentPayload invite_args = NULL;
+  SilcID id;
 
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
-    return;
+  /* Sanity checks */
+  CHECK_STATUS("Cannot set ban: ");
+  CHECK_ARGS(2, 3);
+
+  /* Take Channel ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
   }
 
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Get the invite list */
+  tmp = silc_argument_get_arg_type(args, 3, &len);
+  if (tmp)
+    invite_args = silc_argument_list_parse(tmp, len);
+
   /* Notify application */
-  COMMAND_REPLY((ARGS));
+  silc_client_command_callback(cmd, channel, invite_args);
+
+  if (invite_args)
+    silc_argument_payload_free(invite_args);
 
-  silc_client_command_reply_free(cmd);
+ out:
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }
 
-/* Reply to NAMES command. Received list of client names on the channel 
-   we requested. */
+/********************************** LEAVE ***********************************/
 
-SILC_CLIENT_CMD_REPLY_FUNC(names)
+/* Reply to LEAVE command. */
+
+SILC_FSM_STATE(silc_client_command_reply_leave)
 {
-  SilcClientCommandReplyContext cmd = (SilcClientCommandReplyContext)context;
-  SilcClientConnection conn = (SilcClientConnection)cmd->sock->user_data;
-  SilcCommandStatus status;
-  SilcIDCacheEntry id_cache = NULL;
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
   SilcChannelEntry channel;
-  SilcChannelID *channel_id = NULL;
-  SilcBuffer client_id_list;
-  SilcBuffer client_mode_list;
-  unsigned char *tmp;
-  char *name_list, *cp;
-  int i, k, len1, len2, list_count = 0;
+  SilcCipher key;
+  SilcHmac hmac;
+  SilcID id;
 
-  SILC_LOG_DEBUG(("Start"));
+  /* Sanity checks */
+  CHECK_STATUS("Cannot set leave: ");
+  CHECK_ARGS(2, 2);
 
-  tmp = silc_argument_get_arg_type(cmd->args, 1, NULL);
-  SILC_GET16_MSB(status, tmp);
-  if (status != SILC_STATUS_OK) {
-    cmd->client->ops->say(cmd->client, conn,
-            "%s", silc_client_command_status_message(status));
-    COMMAND_REPLY_ERROR;
+  /* Get Channel ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
 
+  /* Get the channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  /* Remove us from this channel. */
+  silc_client_remove_from_channel(client, conn, channel, conn->local_entry);
+
+  /* Notify application */
+  silc_client_command_callback(cmd, channel);
+
+  /* Remove old keys and stuff.  The channel may remain even after leaving
+     but we want to remove these always. */
+  if (channel->internal.send_key)
+    silc_cipher_free(channel->internal.send_key);
+  channel->internal.send_key = NULL;
+  if (channel->internal.receive_key)
+    silc_cipher_free(channel->internal.receive_key);
+  channel->internal.receive_key = NULL;
+  if (channel->internal.hmac)
+    silc_hmac_free(channel->internal.hmac);
+  channel->internal.hmac = NULL;
+  if (channel->internal.old_channel_keys) {
+    silc_dlist_start(channel->internal.old_channel_keys);
+    while ((key = silc_dlist_get(channel->internal.old_channel_keys)))
+      silc_cipher_free(key);
+    silc_dlist_uninit(channel->internal.old_channel_keys);
+  }
+  channel->internal.old_channel_keys = NULL;
+  if (channel->internal.old_hmacs) {
+    silc_dlist_start(channel->internal.old_hmacs);
+    while ((hmac = silc_dlist_get(channel->internal.old_hmacs)))
+      silc_hmac_free(hmac);
+    silc_dlist_uninit(channel->internal.old_hmacs);
+  }
+  channel->internal.old_hmacs = NULL;
+
+  /* Now delete the channel. */
+  silc_client_empty_channel(client, conn, channel);
+  silc_client_del_channel(client, conn, channel);
+
+ out:
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
+
+/********************************* USERS ************************************/
+
+/* Continue USERS command reply processing after resolving unknown users */
+
+static void
+silc_client_command_reply_users_resolved(SilcClient client,
+                                        SilcClientConnection conn,
+                                        SilcStatus status,
+                                        SilcDList clients,
+                                        void *context)
+{
+  SilcClientCommandContext cmd = context;
+  SILC_FSM_CALL_CONTINUE(&cmd->thread);
+}
+
+
+/* Continue USERS command after resolving unknown channel */
+
+static void
+silc_client_command_reply_users_continue(SilcClient client,
+                                        SilcClientConnection conn,
+                                        SilcStatus status,
+                                        SilcDList channels,
+                                        void *context)
+{
+  SilcClientCommandContext cmd = context;
+
+  if (!channels) {
+    SilcCommandPayload payload = silc_fsm_get_state_context(&cmd->thread);
+    SilcArgumentPayload args = silc_command_get_args(payload);
+
+    cmd->status = SILC_STATUS_ERR_NO_SUCH_CHANNEL_ID;
+    ERROR_CALLBACK(cmd->status);
+    silc_fsm_next(&cmd->thread, silc_client_command_reply_processed);
+  }
+
+  SILC_FSM_CALL_CONTINUE(&cmd->thread);
+}
+
+/* Reply to USERS command. Received list of client ID's and theirs modes
+   on the channel we requested. */
+
+SILC_FSM_STATE(silc_client_command_reply_users)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  unsigned char *tmp;
+  SilcUInt32 tmp_len, list_count, mode;
+  SilcUInt16 idp_len;
+  SilcHashTableList htl;
+  SilcBufferStruct client_id_list, client_mode_list;
+  SilcChannelEntry channel = NULL;
+  SilcClientEntry client_entry;
+  SilcID id;
+  int i;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get users: ");
+  CHECK_ARGS(5, 5);
+
   /* Get channel ID */
-  tmp = silc_argument_get_arg_type(cmd->args, 2, &len1);
-  if (!tmp) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot Channel ID: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-  channel_id = silc_id_payload_parse_id(tmp, len1);
 
-  /* Get the name list of the channel */
-  name_list = silc_argument_get_arg_type(cmd->args, 3, &len1);
-  if (!name_list) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot get user list: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+  /* Get channel entry */
+  channel = silc_client_get_channel_by_id(client, conn, &id.u.channel_id);
+  if (!channel) {
+    /* Resolve the channel from server */
+    SILC_FSM_CALL(silc_client_get_channel_by_id_resolve(
+                       client, conn, &id.u.channel_id,
+                       silc_client_command_reply_users_continue, cmd));
+    /* NOT REACHED */
+  }
+
+  /* Get the list count */
+  tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
+  if (!tmp || tmp_len != 4) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
+  SILC_GET32_MSB(list_count, tmp);
 
   /* Get Client ID list */
-  tmp = silc_argument_get_arg_type(cmd->args, 4, &len2);
+  tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
   if (!tmp) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot get user list: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
-
-  client_id_list = silc_buffer_alloc(len2);
-  silc_buffer_pull_tail(client_id_list, len2);
-  silc_buffer_put(client_id_list, tmp, len2);
+  silc_buffer_set(&client_id_list, tmp, tmp_len);
+
+  /* Resolve users we do not know about */
+  if (!cmd->resolved) {
+    cmd->resolved = TRUE;
+    silc_client_unref_channel(client, conn, channel);
+    SILC_FSM_CALL(silc_client_get_clients_by_list(
+                         client, conn, list_count, &client_id_list,
+                         silc_client_command_reply_users_resolved, cmd));
+    /* NOT REACHED */
+  }
 
   /* Get client mode list */
-  tmp = silc_argument_get_arg_type(cmd->args, 5, &len2);
+  tmp = silc_argument_get_arg_type(args, 5, &tmp_len);
   if (!tmp) {
-    cmd->client->ops->say(cmd->client, conn, 
-                         "Cannot get user list: Bad reply packet");
-    COMMAND_REPLY_ERROR;
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
     goto out;
   }
+  silc_buffer_set(&client_mode_list, tmp, tmp_len);
 
-  client_mode_list = silc_buffer_alloc(len2);
-  silc_buffer_pull_tail(client_mode_list, len2);
-  silc_buffer_put(client_mode_list, tmp, len2);
+  SILC_LOG_DEBUG(("channel %s, %d users", channel->channel_name, list_count));
 
-  /* Get the channel name */
-  if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
-                                  SILC_ID_CHANNEL, &id_cache)) {
-    COMMAND_REPLY_ERROR;
-    goto out;
-  }
-  
-  channel = (SilcChannelEntry)id_cache->context;
+  silc_rwlock_wrlock(channel->internal.lock);
+
+  /* Cache the received Client ID's and modes. */
+  for (i = 0; i < list_count; i++) {
+    SILC_GET16_MSB(idp_len, client_id_list.data + 2);
+    idp_len += 4;
+    if (!silc_id_payload_parse_id(client_id_list.data, idp_len, &id))
+      goto out;
 
-  /* If there is pending command we know that user has called this command
-     and we will handle the name list differently. */
-  if (cmd->callback) {
-    /* We will resolve all the necessary information about the people
-       on the channel. Only after that will we display the user list. */
-    for (i = 0; i < len1; i++) {
-      /* XXX */
+    /* Mode */
+    SILC_GET32_MSB(mode, client_mode_list.data);
 
+    /* Save the client on this channel.  Unknown clients are ignored as they
+       clearly do not exist since the resolving didn't find them. */
+    client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+    if (client_entry && client_entry->internal.valid) {
+      silc_rwlock_wrlock(client_entry->internal.lock);
+      silc_client_add_to_channel(client, conn, channel, client_entry, mode);
+      silc_rwlock_unlock(client_entry->internal.lock);
     }
-    silc_client_command_pending_del(SILC_COMMAND_NAMES);
-  } else {
-    /* there is no pending callback it means that this command reply
-       has been received without calling the command, ie. server has sent
-       the reply without getting the command from us first. This happens
-       with SILC servers that sends NAMES reply after joining to a channel. */
-
-    /* Remove commas from list */
-    for (i = 0; i < len1; i++)
-      if (name_list[i] == ',') {
-       name_list[i] = ' ';
-       list_count++;
-      }
-    list_count++;
-  }
+    silc_client_unref_client(client, conn, client_entry);
 
-  /* Remove old client list from channel, if exists */
-  if (channel->clients) {
-    silc_free(channel->clients);
-    channel->clients = NULL;
-    channel->clients_count = 0;
+    if (!silc_buffer_pull(&client_id_list, idp_len)) {
+      silc_rwlock_unlock(channel->internal.lock);
+      goto out;
+    }
+    if (!silc_buffer_pull(&client_mode_list, 4)) {
+      silc_rwlock_unlock(channel->internal.lock);
+      goto out;
+    }
   }
 
-  /* Allocate room for clients in the channel */
-  channel->clients = silc_calloc(list_count, sizeof(*channel->clients));
+  silc_rwlock_unlock(channel->internal.lock);
 
-  /* Cache the received name list, client ID's and modes. This cache expires
-     whenever server sends notify message to channel. It means two things;
-     some user has joined or leaved the channel. */
-  cp = name_list;
-  for (i = 0; i < list_count; i++) {
-    int nick_len = strcspn(name_list, " ");
-    unsigned short idp_len;
-    unsigned int mode;
-    char *nickname = silc_calloc(nick_len + 1, sizeof(*nickname));
-    SilcClientID *client_id;
-    SilcClientEntry client;
-
-    memcpy(nickname, name_list, nick_len);
-    SILC_GET16_MSB(idp_len, client_id_list->data + 2);
-    idp_len += 4;
-    client_id = silc_id_payload_parse_id(client_id_list->data, idp_len);
-    silc_buffer_pull(client_id_list, idp_len);
-    
-    SILC_GET32_MSB(mode, client_mode_list->data);
-    silc_buffer_pull(client_mode_list, 4);
+  /* Notify application */
+  silc_hash_table_list(channel->user_list, &htl);
+  silc_client_command_callback(cmd, channel, &htl);
+  silc_hash_table_list_reset(&htl);
 
-    /* Check if we have this client cached already. */
-    if (!silc_idcache_find_by_id_one(conn->client_cache, (void *)client_id,
-                                    SILC_ID_CLIENT, &id_cache)) {
-      client = silc_calloc(1, sizeof(*client));
-      client->id = client_id;
-      silc_parse_nickname(nickname, &client->nickname, &client->server, 
-                         &client->num);
-      silc_free(nickname);
-
-      /* Add client to cache */
-      silc_idcache_add(conn->client_cache, client->nickname, SILC_ID_CLIENT,
-                      client_id, (void *)client, TRUE);
-    } else {
-      client = (SilcClientEntry)id_cache->context;
-      silc_free(client_id);
-      silc_free(nickname);
-      id_cache = NULL;
-    }
+ out:
+  silc_client_unref_channel(client, conn, channel);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
 
-    channel->clients[channel->clients_count].client = client;
-    channel->clients[channel->clients_count].mode = mode;
-    channel->clients_count++;
+/********************************** GETKEY **********************************/
 
-    name_list += nick_len + 1;
+/* Received command reply to GETKEY command. WE've received the remote
+   client's public key. */
+
+SILC_FSM_STATE(silc_client_command_reply_getkey)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcClientConnection conn = cmd->conn;
+  SilcClient client = conn->client;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcClientEntry client_entry;
+  SilcServerEntry server_entry;
+  unsigned char *tmp;
+  SilcUInt32 len;
+  SilcPublicKey public_key;
+  SilcID id;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get key: ");
+  CHECK_ARGS(2, 3);
+
+  /* Get the ID */
+  if (!silc_argument_get_decoded(args, 2, SILC_ARGUMENT_ID, &id, NULL)) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
   }
 
-  name_list = cp;
-  for (i = 0; i < list_count; i++) {
-    int c;
-    int nick_len = strcspn(name_list, " ");
-    char *nickname = silc_calloc(nick_len + 1, sizeof(*nickname));
-    memcpy(nickname, name_list, nick_len);
-
-    for (c = 0, k = 0; k < channel->clients_count; k++) {
-      if (channel->clients[k].client && 
-         !strncmp(channel->clients[k].client->nickname, 
-                  nickname, strlen(channel->clients[k].client->nickname))) {
-       char t[8];
-       
-       if (!c) {
-         c++;
-         continue;
-       }
-       
-       memset(t, 0, sizeof(t));
-       channel->clients[k].client->nickname = 
-         silc_calloc(strlen(nickname) + 8, sizeof(*channel->clients[k].
-                                                  client->nickname));
-       snprintf(t, sizeof(t), "[%d]", c++);
-       strncat(channel->clients[k].client->nickname, t, strlen(t));
-       strncat(channel->clients[k].client->nickname, nickname, 
-               strlen(nickname));
-      }
+  /* Get the public key */
+  tmp = silc_argument_get_arg_type(args, 3, &len);
+  if (!tmp) {
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+  if (!silc_public_key_payload_decode(tmp, len, &public_key)) {
+    SAY(client, conn, SILC_CLIENT_MESSAGE_COMMAND_ERROR,
+        "Cannot decode public key: malformed/unsupported public key");
+    ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+    goto out;
+  }
+
+  if (id.type == SILC_ID_CLIENT) {
+    /* Received client's public key */
+    client_entry = silc_client_get_client_by_id(client, conn, &id.u.client_id);
+    if (!client_entry) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+      goto out;
     }
 
-    silc_free(nickname);
-  }
+    silc_rwlock_wrlock(client_entry->internal.lock);
 
-  name_list = NULL;
-  len1 = 0;
-  for (k = 0; k < channel->clients_count; k++) {
-    char *m, *n = channel->clients[k].client->nickname;
-    len2 = strlen(n);
-    len1 += len2;
+    /* Save fingerprint */
+    if (!client_entry->fingerprint)
+      silc_hash_make(conn->internal->sha1hash, tmp + 4, len - 4,
+                    client_entry->fingerprint);
+    if (!client_entry->public_key) {
+      client_entry->public_key = public_key;
+      public_key = NULL;
+    }
 
-    name_list = silc_realloc(name_list, sizeof(*name_list) * (len1 + 3));
+    silc_rwlock_unlock(client_entry->internal.lock);
+
+    /* Notify application */
+    silc_client_command_callback(cmd, SILC_ID_CLIENT, client_entry,
+                                client_entry->public_key);
+    silc_client_unref_client(client, conn, client_entry);
+  } else if (id.type == SILC_ID_SERVER) {
+    /* Received server's public key */
+    server_entry = silc_client_get_server_by_id(client, conn, &id.u.server_id);
+    if (!server_entry) {
+      ERROR_CALLBACK(SILC_STATUS_ERR_NOT_ENOUGH_PARAMS);
+      goto out;
+    }
+
+    silc_rwlock_wrlock(server_entry->internal.lock);
 
-    m = silc_client_chumode_char(channel->clients[k].mode);
-    if (m) {
-      memcpy(name_list + (len1 - len2), m, strlen(m));
-      len1 += strlen(m);
-      silc_free(m);
+    if (!server_entry->public_key) {
+      server_entry->public_key = public_key;
+      public_key = NULL;
     }
 
-    memcpy(name_list + (len1 - len2), n, len2);
-    name_list[len1] = 0;
-    
-    if (k == channel->clients_count - 1)
-      break;
-    memcpy(name_list + len1, " ", 1);
-    len1++;
+    silc_rwlock_unlock(server_entry->internal.lock);
+
+    /* Notify application */
+    silc_client_command_callback(cmd, SILC_ID_SERVER, server_entry,
+                                server_entry->public_key);
+    silc_client_unref_server(client, conn, server_entry);
   }
 
-  cmd->client->ops->say(cmd->client, conn,
-                       "Users on %s: %s", channel->channel_name, name_list);
+ out:
+  if (public_key)
+    silc_pkcs_public_key_free(public_key);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
+
+/********************************** SERVICE *********************************/
+
+/* Reply to SERVICE command. */
+/* XXX incomplete */
+
+SILC_FSM_STATE(silc_client_command_reply_service)
+{
+  SilcClientCommandContext cmd = fsm_context;
+  SilcCommandPayload payload = state_context;
+  SilcArgumentPayload args = silc_command_get_args(payload);
+  SilcUInt32 tmp_len;
+  unsigned char *service_list, *name;
+
+  /* Sanity checks */
+  CHECK_STATUS("Cannot get service: ");
+
+  /* Get service list */
+  service_list = silc_argument_get_arg_type(args, 2, &tmp_len);
+
+  /* Get requested service name */
+  name = silc_argument_get_arg_type(args, 3, &tmp_len);
 
   /* Notify application */
-  COMMAND_REPLY((ARGS, channel, name_list, client_id_list->head,
-                client_mode_list->head));
+  silc_client_command_callback(cmd, service_list, name);
 
-  silc_free(name_list);
-  silc_buffer_free(client_id_list);
-  silc_buffer_free(client_mode_list);
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
+}
 
- out:
-  if (channel_id)
-    silc_free(channel_id);
-  silc_client_command_reply_free(cmd);
+/*********************************** QUIT ***********************************/
+
+/* QUIT command reply stub */
+
+SILC_FSM_STATE(silc_client_command_reply_quit)
+{
+  silc_fsm_next(fsm, silc_client_command_reply_processed);
+  return SILC_FSM_CONTINUE;
 }