updates.
[silc.git] / apps / silcd / packet_receive.c
index 29752416068c1b32778e492cfe1fc2561a041ca0..080e9eb5c0afde9fa5985f46dfac2ec6b09232c5 100644 (file)
@@ -338,6 +338,11 @@ void silc_server_notify(SilcServer server,
     /* Remove the client from all channels. */
     silc_server_remove_from_channels(server, NULL, client, TRUE, tmp, FALSE);
 
+    /* Check if anyone is watching this nickname */
+    if (server->server_type == SILC_ROUTER)
+      silc_server_check_watcher_list(server, client, NULL,
+                                    SILC_NOTIFY_TYPE_SIGNOFF);
+
     client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
     cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
     break;
@@ -402,8 +407,9 @@ void silc_server_notify(SilcServer server,
     /* Get user's channel entry and check that topic set is allowed. */
     if (!silc_server_client_on_channel(client, channel, &chl))
       goto out;
-    if (chl->mode == SILC_CHANNEL_UMODE_NONE && 
-       channel->mode & SILC_CHANNEL_MODE_TOPIC) {
+    if (channel->mode & SILC_CHANNEL_MODE_TOPIC &&
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
       SILC_LOG_DEBUG(("Topic change is not allowed"));
       goto out;
     }
@@ -455,16 +461,18 @@ void silc_server_notify(SilcServer server,
       nickname = silc_argument_get_arg_type(args, 3, &nickname_len);;
 
       /* Replace the Client ID */
-      client = silc_idlist_replace_client_id(server->global_list, client_id,
+      client = silc_idlist_replace_client_id(server,
+                                            server->global_list, client_id,
                                             client_id2, nickname);
       if (!client)
-       client = silc_idlist_replace_client_id(server->local_list, client_id, 
+       client = silc_idlist_replace_client_id(server,
+                                              server->local_list, client_id, 
                                               client_id2, nickname);
 
       if (client) {
        /* Send the NICK_CHANGE notify type to local clients on the channels
           this client is joined to. */
-       silc_server_send_notify_on_channels(server, NULL, client,
+       silc_server_send_notify_on_channels(server, client, client,
                                            SILC_NOTIFY_TYPE_NICK_CHANGE, 3,
                                            id, tmp_len, id2, tmp_len,
                                            nickname, nickname ?
@@ -583,8 +591,7 @@ void silc_server_notify(SilcServer server,
       /* Set the HMAC key out of current channel key. The client must do
         this locally. */
       silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, 
-                    channel->key_len / 8, 
-                    hash);
+                    channel->key_len / 8, hash);
       silc_hmac_set_key(channel->hmac, hash, 
                        silc_hash_len(silc_hmac_get_hash(channel->hmac)));
       memset(hash, 0, sizeof(hash));
@@ -688,7 +695,8 @@ void silc_server_notify(SilcServer server,
        
        if (client != client2) {
          /* Sender must be operator */
-         if (chl->mode == SILC_CHANNEL_UMODE_NONE) {
+         if (!(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
+             !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
            SILC_LOG_DEBUG(("CUMODE change is not allowed"));
            goto out;
          }
@@ -828,8 +836,9 @@ void silc_server_notify(SilcServer server,
     /* Get user's channel entry and check that inviting is allowed. */
     if (!silc_server_client_on_channel(client, channel, &chl))
       goto out;
-    if (chl->mode == SILC_CHANNEL_UMODE_NONE && 
-       channel->mode & SILC_CHANNEL_MODE_INVITE) {
+    if (channel->mode & SILC_CHANNEL_MODE_INVITE &&
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
       SILC_LOG_DEBUG(("Inviting is not allowed"));
       goto out;
     }
@@ -1047,6 +1056,15 @@ void silc_server_notify(SilcServer server,
            silc_server_remove_from_channels(server, NULL, client, 
                                             TRUE, NULL, FALSE);
 
+           /* Check if anyone is watching this nickname */
+           if (server->server_type == SILC_ROUTER)
+             silc_server_check_watcher_list(server, client, NULL,
+                                            SILC_NOTIFY_TYPE_SERVER_SIGNOFF);
+
+           /* Remove this client from watcher list if it is */
+           if (local)
+             silc_server_del_from_watcher_list(server, client);
+
            /* Remove the client */
            silc_idlist_del_client(local ? server->local_list :
                                   server->global_list, client);
@@ -1148,7 +1166,8 @@ void silc_server_notify(SilcServer server,
       /* Kicker must be operator on channel */
       if (!silc_server_client_on_channel(client2, channel, &chl))
        goto out;
-      if (chl->mode == SILC_CHANNEL_UMODE_NONE) {
+      if (!(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
+         !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
        SILC_LOG_DEBUG(("Kicking is not allowed"));
        goto out;
       }
@@ -1249,6 +1268,11 @@ void silc_server_notify(SilcServer server,
       silc_server_remove_from_channels(server, NULL, client, FALSE, NULL, 
                                       FALSE);
 
+      /* Check if anyone is watching this nickname */
+      if (server->server_type == SILC_ROUTER)
+       silc_server_check_watcher_list(server, client, NULL,
+                                      SILC_NOTIFY_TYPE_KILLED);
+
       break;
     }
 
@@ -1299,6 +1323,11 @@ void silc_server_notify(SilcServer server,
     /* Change the mode */
     client->mode = mode;
 
+    /* Check if anyone is watching this nickname */
+    if (server->server_type == SILC_ROUTER)
+      silc_server_check_watcher_list(server, client, NULL,
+                                    SILC_NOTIFY_TYPE_UMODE_CHANGE);
+
     break;
 
   case SILC_NOTIFY_TYPE_BAN:
@@ -1367,6 +1396,42 @@ void silc_server_notify(SilcServer server,
     }
     break;
 
+  case SILC_NOTIFY_TYPE_ERROR:
+    {
+      /*
+       * Error notify
+       */
+      SilcStatus error;
+
+      tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
+      if (!tmp && tmp_len != 1)
+       goto out;
+      error = (SilcStatus)tmp[0];
+
+      SILC_LOG_DEBUG(("ERROR notify (%d)", error));
+
+      if (error == SILC_STATUS_ERR_NO_SUCH_CLIENT_ID &&
+         sock->type == SILC_SOCKET_TYPE_ROUTER) {
+       tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
+       if (tmp) {
+         SILC_LOG_DEBUG(("Received invalid client ID notification, deleting "
+                         "the entry from cache"));
+         client_id = silc_id_payload_parse_id(tmp, tmp_len, NULL);
+         if (!client_id)
+           goto out;
+         client = silc_idlist_find_client_by_id(server->global_list, 
+                                                client_id, FALSE, NULL);
+         if (client) {
+           silc_server_remove_from_channels(server, NULL, client, TRUE, 
+                                            NULL, TRUE);
+           silc_idlist_del_client(server->global_list, client);
+         }
+         silc_free(client_id);
+       }
+      }
+    }
+    break;
+
     /* Ignore rest of the notify types for now */
   case SILC_NOTIFY_TYPE_NONE:
   case SILC_NOTIFY_TYPE_MOTD:
@@ -1458,35 +1523,37 @@ void silc_server_private_message(SilcServer server,
                                          &idata, &client);
   if (!dst_sock) {
     SilcBuffer idp;
+    unsigned char error;
 
     if (client && client->mode & SILC_UMODE_DETACHED) {
-      SILC_LOG_DEBUG(("Locally connected client is detached, "
-                     "discarding packet"));
+      SILC_LOG_DEBUG(("Client is detached, discarding packet"));
       return;
     }
 
-    /* Send IDENTIFY command reply with error status to indicate that
-       such destination ID does not exist or is invalid */
+    /* Send SILC_NOTIFY_TYPE_ERROR to indicate that such destination ID
+       does not exist or is invalid. */
     idp = silc_id_payload_encode_data(packet->dst_id,
                                      packet->dst_id_len,
                                      packet->dst_id_type);
     if (!idp)
       return;
 
+    error = SILC_STATUS_ERR_NO_SUCH_CLIENT_ID;
     if (packet->src_id_type == SILC_ID_CLIENT) {
       SilcClientID *client_id = silc_id_str2id(packet->src_id,
                                               packet->src_id_len,
                                               packet->src_id_type);
-      silc_server_send_dest_command_reply(server, sock, 
-                                         client_id, SILC_ID_CLIENT,
-                                         SILC_COMMAND_IDENTIFY,
-                                         SILC_STATUS_ERR_NO_SUCH_CLIENT_ID, 
-                                         0, 0, 1, 2, idp->data, idp->len);
+      silc_server_send_notify_dest(server, sock, FALSE,
+                                  client_id, SILC_ID_CLIENT,
+                                  SILC_NOTIFY_TYPE_ERROR, 2,
+                                  &error, 1,
+                                  idp->data, idp->len);
       silc_free(client_id);
     } else {
-      silc_server_send_command_reply(server, sock, SILC_COMMAND_IDENTIFY,
-                                    SILC_STATUS_ERR_NO_SUCH_CLIENT_ID, 0,
-                                    0, 1, 2, idp->data, idp->len);
+      silc_server_send_notify(server, sock, FALSE,
+                             SILC_NOTIFY_TYPE_ERROR, 2,
+                             &error, 1,
+                             idp->data, idp->len);
     }
 
     silc_buffer_free(idp);
@@ -1644,7 +1711,34 @@ void silc_server_channel_message(SilcServer server,
   if (!channel) {
     channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
     if (!channel) {
-      SILC_LOG_DEBUG(("Could not find channel"));
+      SilcBuffer idp;
+      unsigned char error;
+
+      /* Send SILC_NOTIFY_TYPE_ERROR to indicate that such destination ID
+        does not exist or is invalid. */
+      idp = silc_id_payload_encode_data(packet->dst_id,
+                                       packet->dst_id_len,
+                                       packet->dst_id_type);
+      if (!idp)
+       goto out;
+
+      error = SILC_STATUS_ERR_NO_SUCH_CHANNEL_ID;
+      if (packet->src_id_type == SILC_ID_CLIENT) {
+       SilcClientID *client_id = silc_id_str2id(packet->src_id,
+                                                packet->src_id_len,
+                                                packet->src_id_type);
+       silc_server_send_notify_dest(server, sock, FALSE,
+                                    client_id, SILC_ID_CLIENT,
+                                    SILC_NOTIFY_TYPE_ERROR, 2,
+                                    &error, 1, idp->data, idp->len);
+       silc_free(client_id);
+      } else {
+       silc_server_send_notify(server, sock, FALSE,
+                               SILC_NOTIFY_TYPE_ERROR, 2,
+                               &error, 1, idp->data, idp->len);
+      }
+      
+      silc_buffer_free(idp);
       goto out;
     }
   }
@@ -1671,7 +1765,9 @@ void silc_server_channel_message(SilcServer server,
 
     /* If channel is moderated check that client is allowed to send
        messages. */
-    if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS && !chl->mode) {
+    if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS && 
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
+       !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
       SILC_LOG_DEBUG(("Channel is silenced from normal users"));
       goto out;
     }
@@ -1747,9 +1843,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
   SilcBuffer buffer = packet->buffer;
   SilcClientEntry client;
   SilcClientID *client_id;
-  SilcBuffer reply;
   SilcIDListData idata;
-  char *username = NULL, *realname = NULL, *id_string;
+  char *username = NULL, *realname = NULL;
   SilcUInt16 username_len;
   SilcUInt32 id_len;
   int ret;
@@ -1768,8 +1863,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
   /* Remove the old cache entry. */
   if (!silc_idcache_del_by_context(server->local_list->clients, client)) {
     SILC_LOG_INFO(("Unauthenticated client attempted to register to network"));
-    silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                  "You have not been authenticated");
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_NOT_AUTHENTICATED, NULL);
     return NULL;
   }
 
@@ -1784,8 +1879,9 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     silc_free(realname);
     SILC_LOG_ERROR(("Client %s (%s) sent incomplete information, closing "
                    "connection", sock->hostname, sock->ip));
-    silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                  "Incomplete client information");
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION, 
+                                 NULL);
     return NULL;
   }
 
@@ -1794,8 +1890,9 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     silc_free(realname);
     SILC_LOG_ERROR(("Client %s (%s) did not send its username, closing "
                    "connection", sock->hostname, sock->ip));
-    silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                  "Incomplete client information");
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                 NULL);
     return NULL;
   }
 
@@ -1830,8 +1927,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
       SILC_LOG_ERROR(("Client %s (%s) sent incomplete information, closing "
                      "connection", sock->hostname, sock->ip));
       silc_server_disconnect_remote(server, sock, 
-                                   "Server closed connection: "
-                                   "Incomplete client information");
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   NULL);
       return NULL;
     }
     
@@ -1850,8 +1947,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
       SILC_LOG_ERROR(("Client %s (%s) sent incomplete information, closing "
                      "connection", sock->hostname, sock->ip));
       silc_server_disconnect_remote(server, sock, 
-                                   "Server closed connection: "
-                                   "Incomplete client information");
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   NULL);
       return NULL;
     }
     
@@ -1899,7 +1996,7 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     nickfail++;
     if (nickfail > 9) {
       silc_server_disconnect_remote(server, sock, 
-                                   "Server closed connection: Bad nickname");
+                                   SILC_STATUS_ERR_BAD_NICKNAME, NULL);
       return NULL;
     }
     snprintf(&nickname[strlen(nickname) - 1], 1, "%d", nickfail);
@@ -1925,21 +2022,16 @@ SilcClientEntry silc_server_new_client(SilcServer server,
                            client->id, SILC_ID_CLIENT, id_len);
   
   /* Send the new client ID to the client. */
-  id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
-  reply = silc_buffer_alloc_size(2 + 2 + id_len);
-  silc_buffer_format(reply,
-                    SILC_STR_UI_SHORT(SILC_ID_CLIENT),
-                    SILC_STR_UI_SHORT(id_len),
-                    SILC_STR_UI_XNSTRING(id_string, id_len),
-                    SILC_STR_END);
-  silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0, 
-                         reply->data, reply->len, FALSE);
-  silc_free(id_string);
-  silc_buffer_free(reply);
+  silc_server_send_new_id(server, sock, FALSE, client->id, SILC_ID_CLIENT,
+                         silc_id_get_len(client->id, SILC_ID_CLIENT));
 
   /* Send some nice info to the client */
   silc_server_send_connect_notifys(server, sock, client);
 
+  /* Check if anyone is watching this nickname */
+  if (server->server_type == SILC_ROUTER)
+    silc_server_check_watcher_list(server, client, NULL, 0);
+
   return client;
 }
 
@@ -1981,8 +2073,8 @@ SilcServerEntry silc_server_new_server(SilcServer server,
       SILC_LOG_INFO(("Unauthenticated %s attempted to register to "
                     "network", (sock->type == SILC_SOCKET_TYPE_SERVER ?
                                 "server" : "router")));
-      silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                   "You have not been authenticated");
+      silc_server_disconnect_remote(server, sock, 
+                                   SILC_STATUS_ERR_NOT_AUTHENTICATED, NULL);
       return NULL;
     }
     local = FALSE;
@@ -2024,8 +2116,8 @@ SilcServerEntry silc_server_new_server(SilcServer server,
   if (!silc_id_is_valid_server_id(server, server_id, sock)) {
     SILC_LOG_INFO(("Invalid server ID sent by %s (%s)",
                   sock->ip, sock->hostname));
-    silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                 "Your Server ID is not valid");
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_BAD_SERVER_ID, NULL);
     silc_free(server_name);
     return NULL;
   }
@@ -2214,6 +2306,10 @@ static void silc_server_new_id_real(SilcServer server,
       if (sock->type == SILC_SOCKET_TYPE_SERVER)
        server->stat.cell_clients++;
       server->stat.clients++;
+
+      /* Check if anyone is watching this nickname */
+      if (server->server_type == SILC_ROUTER && id_list == server->local_list)
+       silc_server_check_watcher_list(server, entry, NULL, 0);
     }
     break;
 
@@ -2438,9 +2534,15 @@ void silc_server_new_channel(SilcServer server,
                      silc_id_render(channel_id, SILC_ID_CHANNEL), 
                      sock->hostname));
     
-      silc_idlist_add_channel(server->global_list, strdup(channel_name), 
-                             0, channel_id, sock->user_data, NULL, NULL, 0);
+      channel = 
+       silc_idlist_add_channel(server->global_list, strdup(channel_name), 
+                               0, channel_id, sock->user_data, NULL, NULL, 0);
+      if (!channel)
+       return;
+
       server->stat.channels++;
+      if (server->server_type == SILC_ROUTER)
+       channel->users_resolved = TRUE;
     }
   } else {
     /* The channel is coming from our server, thus it is in our cell
@@ -2816,6 +2918,7 @@ typedef struct {
   SilcServer server;
   SilcSocketConnection sock;
   SilcPacketContext *packet;
+  void *data;
 } *SilcServerResumeResolve;
 
 SILC_SERVER_CMD_FUNC(resume_resolve)
@@ -2824,22 +2927,53 @@ SILC_SERVER_CMD_FUNC(resume_resolve)
   SilcServer server = r->server;
   SilcSocketConnection sock = r->sock;
   SilcServerCommandReplyContext reply = context2;
+  SilcClientEntry client;
+
+  SILC_LOG_DEBUG(("Start"));
 
-  if (!context2 || !silc_command_get_status(reply->payload, NULL, NULL)) {
+  if (!reply || !silc_command_get_status(reply->payload, NULL, NULL)) {
     SILC_LOG_ERROR(("Client %s (%s) tried to resume unknown client, "
                    "closing connection", sock->hostname, sock->ip));
-    silc_server_disconnect_remote(server, sock, 
-                                 "Server closed connection: "
-                                 "Incomplete resume information");
+    silc_server_disconnect_remote(server, sock,
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                 "Resuming not possible");
     goto out;
   }
 
+  if (reply && silc_command_get(reply->payload) == SILC_COMMAND_WHOIS) {
+    /* Get entry to the client, and resolve it if we don't have it. */
+    client = silc_idlist_find_client_by_id(server->local_list, 
+                                          r->data, TRUE, NULL);
+    if (!client) {
+      client = silc_idlist_find_client_by_id(server->global_list,
+                                            r->data, TRUE, NULL);
+      if (!client) {
+       SILC_LOG_ERROR(("Client %s (%s) tried to resume unknown client, "
+                       "closing connection", sock->hostname, sock->ip));
+       silc_server_disconnect_remote(server, sock,
+                                     SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                     "Resuming not possible");
+       goto out;
+      }
+    }
+
+    if (!(client->mode & SILC_UMODE_DETACHED)) {
+      SILC_LOG_ERROR(("Client %s (%s) tried to resume un-detached client, "
+                     "closing connection", sock->hostname, sock->ip));
+      silc_server_disconnect_remote(server, sock,
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   "Resuming not possible");
+      goto out;
+    }
+  }
+
   /* Reprocess the packet */
   silc_server_resume_client(server, sock, r->packet);
 
  out:
   silc_socket_free(r->sock);
   silc_packet_context_free(r->packet);
+  silc_free(r->data);
   silc_free(r);
 }
 
@@ -2859,9 +2993,14 @@ void silc_server_resume_client(SilcServer server,
   unsigned char *id_string, *auth = NULL;
   SilcUInt16 id_len, auth_len = 0;
   int ret, nickfail = 0;
-  bool resolved, local;
+  bool resolved, local, nick_change = FALSE;
+  SilcChannelEntry channel;
+  SilcHashTableList htl;
+  SilcChannelClientEntry chl;
   SilcServerResumeResolve r;
 
+  SILC_LOG_DEBUG(("Start"));
+
   ret = silc_buffer_unformat(buffer,
                             SILC_STR_UI16_NSTRING(&id_string, &id_len),
                             SILC_STR_END);
@@ -2871,9 +3010,6 @@ void silc_server_resume_client(SilcServer server,
   if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
     /* Client send this and is attempting to resume to old client session */
     SilcClientEntry client;
-    SilcChannelEntry channel;
-    SilcHashTableList htl;
-    SilcChannelClientEntry chl;
     SilcBuffer keyp;
 
     if (ret != -1) {
@@ -2886,8 +3022,9 @@ void silc_server_resume_client(SilcServer server,
     if (!client_id || auth_len < 128) {
       SILC_LOG_ERROR(("Client %s (%s) sent incomplete resume information, "
                      "closing connection", sock->hostname, sock->ip));
-      silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                   "Incomplete resume information");
+      silc_server_disconnect_remote(server, sock,
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   "Resuming not possible");
       return;
     }
 
@@ -2896,48 +3033,71 @@ void silc_server_resume_client(SilcServer server,
     idata = (SilcIDListData)client;
 
     /* Get entry to the client, and resolve it if we don't have it. */
-    detached_client = silc_server_get_client_resolve(server, client_id, 
+    detached_client = silc_server_get_client_resolve(server, client_id, FALSE,
                                                     &resolved);
     if (!detached_client) {
       if (resolved) {
        /* The client info is being resolved. Reprocess this packet after
           receiving the reply to the query. */
+       SILC_LOG_DEBUG(("Resolving client"));
        r = silc_calloc(1, sizeof(*r));
        if (!r)
          return;
-
        r->server = server;
        r->sock = silc_socket_dup(sock);
        r->packet = silc_packet_context_dup(packet);
+       r->data = silc_id_dup(client_id, SILC_ID_CLIENT);
        silc_server_command_pending(server, SILC_COMMAND_WHOIS,
                                    server->cmd_ident,
                                    silc_server_command_resume_resolve, r);
       } else {
        SILC_LOG_ERROR(("Client %s (%s) tried to resume unknown client, "
                        "closing connection", sock->hostname, sock->ip));
-       silc_server_disconnect_remote(server, sock, 
-                                     "Server closed connection: "
-                                     "Incomplete resume information");
+       silc_server_disconnect_remote(server, sock,
+                                     SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                     "Resuming not possible");
       }
       return;
     }
 
-    /* Check that the client is detached */
-    if (!(detached_client->mode & SILC_UMODE_DETACHED)) {
-      SILC_LOG_ERROR(("Client %s (%s) tried to resume un-detached client, "
-                     "closing connection", sock->hostname, sock->ip));
-      silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                   "Incomplete resume information");
-      return;
+    /* Check that the client is detached, and that we have other info too */
+    if (!(detached_client->mode & SILC_UMODE_DETACHED) ||
+       !silc_hash_table_count(detached_client->channels) ||
+       !detached_client->nickname) {
+      if (server->server_type == SILC_SERVER && !server->standalone) {
+       /* The client info is being resolved. Reprocess this packet after
+          receiving the reply to the query. */
+       SILC_LOG_DEBUG(("Resolving client info"));
+       silc_server_get_client_resolve(server, client_id, TRUE, NULL);
+       r = silc_calloc(1, sizeof(*r));
+       if (!r)
+         return;
+       r->server = server;
+       r->sock = silc_socket_dup(sock);
+       r->packet = silc_packet_context_dup(packet);
+       r->data = silc_id_dup(client_id, SILC_ID_CLIENT);
+       silc_server_command_pending(server, SILC_COMMAND_WHOIS,
+                                   server->cmd_ident,
+                                   silc_server_command_resume_resolve, r);
+       return;
+      }
+      if (server->server_type == SILC_SERVER) {
+       SILC_LOG_ERROR(("Client %s (%s) tried to resume un-detached client, "
+                       "closing connection", sock->hostname, sock->ip));
+       silc_server_disconnect_remote(server, sock,
+                                     SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                     "Resuming not possible");
+       return;
+      }
     }
 
     /* Check that we have the public key of the client, if not then we must
        resolve it first. */
     if (!detached_client->data.public_key) {
       if (server->standalone) {
-       silc_server_disconnect_remote(server, sock, 
-                                     "Server closed connection: "
-                                     "Incomplete resume information");
+       silc_server_disconnect_remote(server, sock,
+                                     SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                     "Resuming not possible");
       } else {
        /* We must retrieve the detached client's public key by sending
           GETKEY command. Reprocess this packet after receiving the key */
@@ -2945,10 +3105,12 @@ void silc_server_resume_client(SilcServer server,
        SilcSocketConnection dest_sock = 
          silc_server_get_client_route(server, NULL, 0, client_id, NULL, NULL);
 
+       SILC_LOG_DEBUG(("Resolving client public key"));
+
        silc_server_send_command(server, dest_sock ? dest_sock : 
                                 server->router->connection,
                                 SILC_COMMAND_GETKEY, ++server->cmd_ident,
-                                1, idp->data, idp->len);
+                                1, 1, idp->data, idp->len);
 
        r = silc_calloc(1, sizeof(*r));
        if (!r)
@@ -2964,6 +3126,14 @@ void silc_server_resume_client(SilcServer server,
        silc_buffer_free(idp);
       }
       return;
+    } else if (!silc_pkcs_public_key_compare(detached_client->data.public_key,
+                                            idata->public_key)) {
+      /* We require that the connection and resuming authentication data
+        must be using same key pair. */
+      silc_server_disconnect_remote(server, sock,
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   "Resuming not possible");
+      return;
     }
 
     /* Verify the authentication payload.  This has to be successful in
@@ -2974,13 +3144,15 @@ void silc_server_resume_client(SilcServer server,
                               SILC_ID_CLIENT)) {
       SILC_LOG_ERROR(("Client %s (%s) resume authentication failed, "
                      "closing connection", sock->hostname, sock->ip));
-      silc_server_disconnect_remote(server, sock, "Server closed connection: "
-                                   "Incomplete resume information");
+      silc_server_disconnect_remote(server, sock,
+                                   SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                   "Resuming not possible");
       return;
     }
 
     /* Now resume the client to the network */
 
+    silc_schedule_task_del_by_context(server->schedule, detached_client);
     sock->user_data = detached_client;
     detached_client->connection = sock;
 
@@ -2993,17 +3165,28 @@ void silc_server_resume_client(SilcServer server,
 
     /* Send the RESUME_CLIENT packet to our primary router so that others
        know this client isn't detached anymore. */
-    if (!server->standalone) {
-      buf = silc_buffer_alloc_size(2 + id_len);
-      silc_buffer_format(buf,
-                        SILC_STR_UI_SHORT(id_len),
-                        SILC_STR_UI_XNSTRING(id_string, id_len),
-                        SILC_STR_END);
+    buf = silc_buffer_alloc_size(2 + id_len);
+    silc_buffer_format(buf,
+                      SILC_STR_UI_SHORT(id_len),
+                      SILC_STR_UI_XNSTRING(id_string, id_len),
+                      SILC_STR_END);
+
+    /* Send to primary router */
+    if (!server->standalone)
       silc_server_packet_send(server, server->router->connection,
                              SILC_PACKET_RESUME_CLIENT, 0, 
                              buf->data, buf->len, TRUE);
-      silc_buffer_free(buf);
-    }
+
+    /* As router we must deliver this packet directly to the original
+       server whom this client was earlier. */
+    if (server->server_type == SILC_ROUTER && detached_client->router &&
+       detached_client->router->server_type != SILC_ROUTER)
+      silc_server_packet_send(server, detached_client->router->connection,
+                             SILC_PACKET_RESUME_CLIENT, 0, 
+                             buf->data, buf->len, TRUE);
+    silc_buffer_free(buf);
+
+    detached_client->router = NULL;
 
     /* Delete this client entry since we're resuming to old one. */
     server->stat.my_clients--;
@@ -3021,42 +3204,69 @@ void silc_server_resume_client(SilcServer server,
        nickfail++;
        if (nickfail > 9) {
          silc_server_disconnect_remote(server, sock, 
-                                       "Server closed connection: "
-                                       "Bad nickname");
+                                       SILC_STATUS_ERR_BAD_NICKNAME, NULL);
          return;
        }
        snprintf(&client->nickname[strlen(client->nickname) - 1], 1, 
                 "%d", nickfail);
       }
+      nick_change = TRUE;
+    }
 
+    if (nick_change) {
       /* Notify about Client ID change, nickname doesn't actually change. */
       if (!server->standalone)
        silc_server_send_notify_nick_change(server, server->router->connection,
                                            FALSE, client->id, client_id,
                                            client->nickname);
-      
-      silc_free(client->id);
-      client->id = client_id;
+    }
+
+    /* Resolve users on those channels that client has joined but we
+       haven't resolved user list yet. */
+    if (server->server_type == SILC_SERVER && !server->standalone) {
+      silc_hash_table_list(client->channels, &htl);
+      while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
+       channel = chl->channel;
+       SILC_LOG_DEBUG(("Resolving users for %s channel", 
+                       channel->channel_name));
+       if (channel->disabled || !channel->users_resolved) {
+         silc_server_send_command(server, server->router->connection,
+                                  SILC_COMMAND_USERS, ++server->cmd_ident,
+                                  1, 2, channel->channel_name,
+                                  strlen(channel->channel_name));
+       }
+      }
+      silc_hash_table_list_reset(&htl);
+    }
+
+    /* Send the new client ID to the client. After this client may start
+       receiving other packets, and may start sending packets too. */
+    silc_server_send_new_id(server, sock, FALSE, client_id, SILC_ID_CLIENT,
+                           silc_id_get_len(client_id, SILC_ID_CLIENT));
+
+    if (nick_change) {
+      /* Send NICK change notify to channels as well. */
+      SilcBuffer oidp, nidp;
+      oidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
+      nidp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
+      silc_server_send_notify_on_channels(server, NULL, client, 
+                                         SILC_NOTIFY_TYPE_NICK_CHANGE, 3,
+                                         oidp->data, oidp->len, 
+                                         nidp->data, nidp->len,
+                                         client->nickname, 
+                                         strlen(client->nickname));
+      silc_buffer_free(oidp);
+      silc_buffer_free(nidp);
     }
 
     /* Add the client again to the ID cache to get it to correct list */
     if (!silc_idcache_del_by_context(server->local_list->clients, client))
       silc_idcache_del_by_context(server->global_list->clients, client);
+    silc_free(client->id);
+    client->id = client_id;
+    client_id = NULL;
     silc_idcache_add(server->local_list->clients, client->nickname,
-                    client->id, client, client->mode, NULL);
-
-    /* Send the new client ID to the client. */
-    id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
-    buf = silc_buffer_alloc_size(2 + 2 + id_len);
-    silc_buffer_format(buf,
-                      SILC_STR_UI_SHORT(SILC_ID_CLIENT),
-                      SILC_STR_UI_SHORT(id_len),
-                      SILC_STR_UI_XNSTRING(id_string, id_len),
-                      SILC_STR_END);
-    silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0, 
-                           buf->data, buf->len, FALSE);
-    silc_free(id_string);
-    silc_buffer_free(buf);
+                    client->id, client, 0, NULL);
 
     /* Send some nice info to the client */
     silc_server_send_connect_notifys(server, sock, client);
@@ -3064,7 +3274,19 @@ void silc_server_resume_client(SilcServer server,
     /* Send all channel keys of channels the client has joined */
     silc_hash_table_list(client->channels, &htl);
     while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
+      bool created = FALSE;
       channel = chl->channel;
+
+      if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY)
+       continue;
+
+      /* If we don't have channel key, then create one */
+      if (!channel->channel_key) {
+       if (!silc_server_create_channel_key(server, channel, 0))
+         continue;
+       created = TRUE;
+      }
+
       id_string = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
       keyp = 
        silc_channel_key_payload_encode(silc_id_get_len(channel->id,
@@ -3079,12 +3301,17 @@ void silc_server_resume_client(SilcServer server,
       /* Send the key packet to client */
       silc_server_packet_send(server, sock, SILC_PACKET_CHANNEL_KEY, 0, 
                              keyp->data, keyp->len, FALSE);
+
+      if (created && server->server_type == SILC_SERVER && 
+         !server->standalone)
+       silc_server_packet_send(server, server->router->connection, 
+                               SILC_PACKET_CHANNEL_KEY, 0, 
+                               keyp->data, keyp->len, FALSE);
+
+      silc_buffer_free(keyp);
     }
     silc_hash_table_list_reset(&htl);
 
-    SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
-                           ("Your session is successfully resumed"));
-
   } else if (sock->type != SILC_SOCKET_TYPE_CLIENT) {
     /* Server or router sent this to us to notify that that a client has
        been resumed. */
@@ -3146,19 +3373,39 @@ void silc_server_resume_client(SilcServer server,
       }
     }
 
+    if (server->server_type == SILC_ROUTER &&
+       sock->type == SILC_SOCKET_TYPE_ROUTER && 
+       server_entry->server_type == SILC_ROUTER)
+      local = FALSE;
+
+    SILC_LOG_DEBUG(("Resuming detached client"));
+
     /* Change the client to correct list. */
     if (!silc_idcache_del_by_context(server->local_list->clients,
                                     detached_client))
       silc_idcache_del_by_context(server->global_list->clients,
                                  detached_client);
-    silc_idcache_add(local ? server->local_list->clients :
-                    server->global_list->clients, detached_client->nickname,
+    silc_idcache_add(local && server->server_type == SILC_ROUTER ? 
+                    server->local_list->clients : 
+                    server->global_list->clients, 
+                    detached_client->nickname,
                     detached_client->id, detached_client, FALSE, NULL);
 
     /* Change the owner of the client if needed */
     if (detached_client->router != server_entry)
       detached_client->router = server_entry;
 
+    /* Update channel information regarding global clients on channel. */
+    if (server->server_type == SILC_SERVER) {
+      silc_hash_table_list(detached_client->channels, &htl);
+      while (silc_hash_table_get(&htl, NULL, (void **)&chl))
+       chl->channel->global_users = 
+         silc_server_channel_has_global(chl->channel);
+      silc_hash_table_list_reset(&htl);
+    }
+
+    silc_schedule_task_del_by_context(server->schedule, detached_client);
+
     /* If the sender of this packet is server and we are router we need to
        broadcast this packet to other routers in the network. */
     if (!server->standalone && server->server_type == SILC_ROUTER &&