src/ngircd/irc-mode.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  *
  11  * IRC commands for mode changes (MODE, AWAY, ...)
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "defines.h"
  24 #include "conn.h"
  25 #include "client.h"
  26 #include "channel.h"
  27 #include "irc-write.h"
  28 #include "lists.h"
  29 #include "log.h"
  30 #include "parse.h"
  31 #include "messages.h"
  32 #include "resolve.h"
  33 #include "conf.h"
  34
  35 #include "exp.h"
  36 #include "irc-mode.h"
  37
  38
  39 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target ));
  40 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel ));
  41
  42 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern));
  43 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern));
  44
  45 static bool Send_ListChange PARAMS(( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Mask ));
  46
  47
  48 GLOBAL bool
  49 IRC_MODE( CLIENT *Client, REQUEST *Req )
  50 {
  51         CLIENT *cl, *origin;
  52         CHANNEL *chan;
  53
  54         assert( Client != NULL );
  55         assert( Req != NULL );
  56
  57         /* No parameters? */
  58         if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  59
  60         /* Origin for answers */
  61         if( Client_Type( Client ) == CLIENT_SERVER )
  62         {
  63                 origin = Client_Search( Req->prefix );
  64                 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  65         }
  66         else origin = Client;
  67
  68         /* Channel or user mode? */
  69         cl = NULL; chan = NULL;
  70         if (Client_IsValidNick(Req->argv[0]))
  71                 cl = Client_Search(Req->argv[0]);
  72         if (Channel_IsValidName(Req->argv[0]))
  73                 chan = Channel_Search(Req->argv[0]);
  74
  75         if (cl)
  76                 return Client_Mode(Client, Req, origin, cl);
  77         if (chan)
  78                 return Channel_Mode(Client, Req, origin, chan);
  79
  80         /* No target found! */
  81         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  82                         Client_ID(Client), Req->argv[0]);
  83 } /* IRC_MODE */
  84
  85
  86 static bool
  87 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
  88 {
  89         /* Handle client mode requests */
  90
  91         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
  92         bool ok, set;
  93         int mode_arg;
  94         size_t len;
  95
  96         /* Is the client allowed to request or change the modes? */
  97         if( Client_Type( Client ) == CLIENT_USER )
  98         {
  99                 /* Users are only allowed to manipulate their own modes! */
 100                 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
 101         }
 102
 103         /* Mode request: let's answer it :-) */
 104         if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
 105
 106         mode_arg = 1;
 107         mode_ptr = Req->argv[mode_arg];
 108
 109         /* Initial state: set or unset modes? */
 110         if( *mode_ptr == '+' ) set = true;
 111         else if( *mode_ptr == '-' ) set = false;
 112         else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
 113
 114         /* Prepare reply string */
 115         if( set ) strcpy( the_modes, "+" );
 116         else strcpy( the_modes, "-" );
 117
 118         x[1] = '\0';
 119         ok = CONNECTED;
 120         while( mode_ptr )
 121         {
 122                 mode_ptr++;
 123                 if( ! *mode_ptr )
 124                 {
 125                         /* Try next argument if there's any */
 126                         mode_arg++;
 127                         if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
 128                         else break;
 129                 }
 130
 131                 switch( *mode_ptr )
 132                 {
 133                         case '+':
 134                         case '-':
 135                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 136                                 {
 137                                         /* Action modifier ("+"/"-") must be changed ... */
 138                                         len = strlen( the_modes ) - 1;
 139                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 140                                         {
 141                                                 /* Adjust last action modifier in result */
 142                                                 the_modes[len] = *mode_ptr;
 143                                         }
 144                                         else
 145                                         {
 146                                                 /* Append modifier character to result string */
 147                                                 x[0] = *mode_ptr;
 148                                                 strlcat( the_modes, x, sizeof( the_modes ));
 149                                         }
 150                                         if( *mode_ptr == '+' ) set = true;
 151                                         else set = false;
 152                                 }
 153                                 continue;
 154                 }
 155
 156                 /* Validate modes */
 157                 x[0] = '\0';
 158                 switch( *mode_ptr )
 159                 {
 160                         case 'i': /* Invisible */
 161                         case 's': /* Server messages */
 162                         case 'w': /* Wallops messages */
 163                                 x[0] = *mode_ptr;
 164                                 break;
 165
 166                         case 'a': /* Away */
 167                                 if( Client_Type( Client ) == CLIENT_SERVER )
 168                                 {
 169                                         x[0] = 'a';
 170                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 171                                 }
 172                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 173                                 break;
 174
 175                         case 'o': /* IRC operator (only unsettable!) */
 176                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 177                                 {
 178                                         Client_SetOperByMe( Target, false );
 179                                         x[0] = 'o';
 180                                 }
 181                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 182                                 break;
 183
 184                         case 'r': /* Restricted (only settable) */
 185                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 186                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 187                                 break;
 188
 189                         default:
 190                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 191                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 192                                 x[0] = '\0';
 193                                 goto client_exit;
 194                 }
 195                 if( ! ok ) break;
 196
 197                 /* Is there a valid mode change? */
 198                 if( ! x[0] ) continue;
 199
 200                 if( set )
 201                 {
 202                         /* Set mode */
 203                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 204
 205                 }
 206                 else
 207                 {
 208                         /* Unset mode */
 209                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 210                 }
 211         }
 212 client_exit:
 213
 214         /* Are there changed modes? */
 215         if( the_modes[1] )
 216         {
 217                 /* Remoce needless action modifier characters */
 218                 len = strlen( the_modes ) - 1;
 219                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 220
 221                 if( Client_Type( Client ) == CLIENT_SERVER )
 222                 {
 223                         /* Forward modes to other servers */
 224                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 225                 }
 226                 else
 227                 {
 228                         /* Send reply to client and inform other servers */
 229                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 230                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 231                 }
 232                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 233                          Client_TypeText(Target), Client_Mask(Target),
 234                          Client_Modes(Target));
 235         }
 236
 237         IRC_SetPenalty( Client, 1 );
 238         return ok;
 239 } /* Client_Mode */
 240
 241
 242 static bool
 243 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 244 {
 245         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 246         const char *mode_ptr;
 247
 248         /* Member or not? -- That's the question! */
 249         if (!Channel_IsMemberOf(Channel, Origin))
 250                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 251                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 252
 253         /* The sender is a member: generate extended reply */
 254         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 255         mode_ptr = the_modes;
 256         the_args[0] = '\0';
 257
 258         while(*mode_ptr) {
 259                 switch(*mode_ptr) {
 260                 case 'l':
 261                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 262                         strlcat(the_args, argadd, sizeof(the_args));
 263                         break;
 264                 case 'k':
 265                         strlcat(the_args, " ", sizeof(the_args));
 266                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 267                         break;
 268                 }
 269                 mode_ptr++;
 270         }
 271         if (the_args[0])
 272                 strlcat(the_modes, the_args, sizeof(the_modes));
 273
 274         return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 275                 Client_ID(Origin), Channel_Name(Channel), the_modes);
 276 }
 277
 278
 279 static bool
 280 Channel_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel )
 281 {
 282         /* Handle channel and channel-user modes */
 283
 284         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2], argadd[CLIENT_PASS_LEN], *mode_ptr;
 285         bool ok, set, modeok = true, skiponce, use_servermode = false, retval;
 286         int mode_arg, arg_arg;
 287         CLIENT *client;
 288         long l;
 289         size_t len;
 290
 291         /* Are modes allowed on channel? */
 292         if (Channel_Name(Channel)[0] == '+')
 293                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 294                                 Client_ID(Client), Channel_Name(Channel));
 295
 296         /* Mode request: let's answer it :-) */
 297         if (Req->argc <= 1)
 298                 return Channel_Mode_Answer_Request(Origin, Channel);
 299
 300         /* Is the user allowed to change modes? */
 301         if (Client_Type(Client) == CLIENT_USER) {
 302                 /* Is the originating user on that channel? */
 303                 if (!Channel_IsMemberOf(Channel, Origin))
 304                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 305                                 Client_ID(Origin), Channel_Name(Channel));
 306                 modeok = false;
 307                 /* channel operator? */
 308                 if (strchr(Channel_UserModes(Channel, Origin), 'o'))
 309                         modeok = true;
 310                 else if(Conf_OperCanMode) {
 311                         /* IRC-Operators can use MODE as well */
 312                         if (Client_OperByMe(Origin)) {
 313                                 modeok = true;
 314                                 if (Conf_OperServerMode)
 315                                         use_servermode = true; /* Change Origin to Server */
 316                         }
 317                 }
 318         }
 319
 320         mode_arg = 1;
 321         mode_ptr = Req->argv[mode_arg];
 322         if (Req->argc > mode_arg + 1)
 323                 arg_arg = mode_arg + 1;
 324         else
 325                 arg_arg = -1;
 326
 327         /* Initial state: set or unset modes? */
 328         skiponce = false;
 329         switch (*mode_ptr) {
 330         case '-': set = false; break;
 331         case '+': set = true; break;
 332         default:
 333                 set = true;
 334                 skiponce = true;
 335         }
 336
 337         /* Prepare reply string */
 338         strcpy(the_modes, set ? "+" : "-");
 339         the_args[0] = '\0';
 340
 341         x[1] = '\0';
 342         ok = CONNECTED;
 343         while (mode_ptr) {
 344                 if (! skiponce)
 345                         mode_ptr++;
 346                 if (!*mode_ptr) {
 347                         /* Try next argument if there's any */
 348                         if (arg_arg > mode_arg)
 349                                 mode_arg = arg_arg;
 350                         else
 351                                 mode_arg++;
 352
 353                         if (mode_arg >= Req->argc)
 354                                 break;
 355                         mode_ptr = Req->argv[mode_arg];
 356
 357                         if (Req->argc > mode_arg + 1)
 358                                 arg_arg = mode_arg + 1;
 359                         else
 360                                 arg_arg = -1;
 361                 }
 362                 skiponce = false;
 363
 364                 switch (*mode_ptr) {
 365                 case '+':
 366                 case '-':
 367                         if (((*mode_ptr == '+') && !set) || ((*mode_ptr == '-') && set)) {
 368                                 /* Action modifier ("+"/"-") must be changed ... */
 369                                 len = strlen( the_modes ) - 1;
 370                                 if ((the_modes[len] == '+') || (the_modes[len] == '-')) {
 371                                         /* Adjust last action modifier in result */
 372                                         the_modes[len] = *mode_ptr;
 373                                 } else {
 374                                         /* Append modifier character to result string */
 375                                         x[0] = *mode_ptr;
 376                                         strlcat(the_modes, x, sizeof(the_modes));
 377                                 }
 378                                 set = *mode_ptr == '+';
 379                         }
 380                         continue;
 381                 }
 382
 383                 /* Are there arguments left? */
 384                 if( arg_arg >= Req->argc ) arg_arg = -1;
 385
 386                 /* Validate modes */
 387                 x[0] = '\0';
 388                 argadd[0] = '\0';
 389                 client = NULL;
 390                 switch (*mode_ptr) {
 391                 /* --- Channel modes --- */
 392                 case 'i': /* Invite only */
 393                 case 'm': /* Moderated */
 394                 case 'n': /* Only members can write */
 395                 case 's': /* Secret channel */
 396                 case 't': /* Topic locked */
 397                         if (modeok)
 398                                 x[0] = *mode_ptr;
 399                         else
 400                                 ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 401                         break;
 402                 case 'k': /* Channel key */
 403                         if (! set) {
 404                                 if (modeok)
 405                                         x[0] = *mode_ptr;
 406                                 else
 407                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 408                                 break;
 409                         }
 410                         if (arg_arg > mode_arg) {
 411                                 if (modeok) {
 412                                         Channel_ModeDel(Channel, 'k');
 413                                         Channel_SetKey(Channel, Req->argv[arg_arg]);
 414                                         strlcpy(argadd, Channel_Key(Channel), sizeof(argadd));
 415                                         x[0] = *mode_ptr;
 416                                 } else {
 417                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 418                                 }
 419                                 Req->argv[arg_arg][0] = '\0';
 420                                 arg_arg++;
 421                         } else {
 422                                 ok = IRC_WriteStrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command);
 423                         }
 424                         break;
 425                 case 'l': /* Member limit */
 426                         if (!set) {
 427                                 if (modeok)
 428                                         x[0] = *mode_ptr;
 429                                 else
 430                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 431                                 break;
 432                         }
 433                         if (arg_arg > mode_arg) {
 434                                 if (modeok) {
 435                                         l = atol(Req->argv[arg_arg]);
 436                                         if (l > 0 && l < 0xFFFF) {
 437                                                 Channel_ModeDel(Channel, 'l');
 438                                                 Channel_SetMaxUsers(Channel, l);
 439                                                 snprintf(argadd, sizeof(argadd), "%ld", l);
 440                                                 x[0] = *mode_ptr;
 441                                         }
 442                                 } else {
 443                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 444                                 }
 445                                 Req->argv[arg_arg][0] = '\0';
 446                                 arg_arg++;
 447                         } else {
 448                                 ok = IRC_WriteStrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command);
 449                         }
 450                         break;
 451                 case 'P': /* Persistent channel */
 452                         if (modeok) {
 453                                 /* Only IRC operators are allowed to
 454                                  * set the 'P' channel mode! */
 455                                 if (set && !(Client_OperByMe(Client) || Client_Type(Client) == CLIENT_SERVER))
 456                                         ok = IRC_WriteStrClient(Origin, ERR_NOPRIVILEGES_MSG, Client_ID(Origin));
 457                                 else
 458                                                 x[0] = 'P';
 459                         } else
 460                                 ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 461                         break;
 462                 /* --- Channel user modes --- */
 463                 case 'o': /* Channel operator */
 464                 case 'v': /* Voice */
 465                         if (arg_arg > mode_arg) {
 466                                 if (modeok) {
 467                                         client = Client_Search(Req->argv[arg_arg]);
 468                                         if (client)
 469                                                 x[0] = *mode_ptr;
 470                                         else
 471                                                 ok = IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->argv[arg_arg]);
 472                                 } else {
 473                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel));
 474                                 }
 475                                 Req->argv[arg_arg][0] = '\0';
 476                                 arg_arg++;
 477                         } else {
 478                                 ok = IRC_WriteStrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command);
 479                         }
 480                         break;
 481                 /* --- Channel lists --- */
 482                 case 'I': /* Invite lists */
 483                 case 'b': /* Ban lists */
 484                         if (arg_arg > mode_arg) {
 485                                 /* modify list */
 486                                 if (modeok) {
 487                                         ok = set ? Add_Ban_Invite(*mode_ptr, Origin, Client, Channel, Req->argv[arg_arg])
 488                                                  : Del_Ban_Invite(*mode_ptr, Origin, Client, Channel, Req->argv[arg_arg]);
 489                                 } else {
 490                                         ok = IRC_WriteStrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG,
 491                                                         Client_ID(Origin), Channel_Name(Channel));
 492                                 }
 493                                 Req->argv[arg_arg][0] = '\0';
 494                                 arg_arg++;
 495                         } else {
 496                                 if (*mode_ptr == 'I')
 497                                         Channel_ShowInvites(Origin, Channel);
 498                                 else
 499                                         Channel_ShowBans(Origin, Channel);
 500                         }
 501                         break;
 502                 default:
 503                         Log(LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 504                                 set ? '+' : '-', *mode_ptr, Client_ID(Origin), Channel_Name(Channel));
 505                         if (Client_Type(Client) != CLIENT_SERVER)
 506                                 ok = IRC_WriteStrClient(Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID(Origin), set ? '+' : '-', *mode_ptr);
 507                         x[0] = '\0';
 508                         goto chan_exit;
 509                 } /* switch() */
 510
 511                 if (!ok)
 512                         break;
 513
 514                 /* Is there a valid mode change? */
 515                 if (!x[0])
 516                         continue;
 517
 518                 /* Validate target client */
 519                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 520                         if (!IRC_WriteStrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
 521                                 Client_ID(Origin), Client_ID(client), Channel_Name(Channel)))
 522                                         break;
 523
 524                         continue;
 525                 }
 526
 527                 if (client) {
 528                         /* Channel-User-Mode */
 529                         retval = set ? Channel_UserModeAdd(Channel, client, x[0]) : Channel_UserModeDel(Channel, client, x[0]);
 530                         if (retval) {
 531                                 strlcat(the_args, " ", sizeof(the_args));
 532                                 strlcat(the_args, Client_ID(client), sizeof(the_args));
 533                                 strlcat(the_modes, x, sizeof(the_modes));
 534                                 Log(LOG_DEBUG, "User \"%s\": Mode change on %s, now \"%s\"",
 535                                         Client_Mask(client), Channel_Name(Channel), Channel_UserModes(Channel, client));
 536                         }
 537                 } else {
 538                         /* Channel-Mode */
 539                         retval = set ? Channel_ModeAdd(Channel, x[0]) : Channel_ModeDel(Channel, x[0]);
 540                         if (retval) {
 541                                 strlcat(the_modes, x, sizeof(the_modes));
 542                                 Log(LOG_DEBUG, "Channel %s: Mode change, now \"%s\".", Channel_Name(Channel), Channel_Modes(Channel));
 543                         }
 544                 }
 545
 546                 /* Are there additional arguments to add? */
 547                 if (argadd[0]) {
 548                         strlcat(the_args, " ", sizeof(the_args));
 549                         strlcat(the_args, argadd, sizeof(the_args));
 550                 }
 551         }
 552 chan_exit:
 553         /* Are there changed modes? */
 554         if (the_modes[1]) {
 555                 /* Clean up mode string */
 556                 len = strlen(the_modes) - 1;
 557                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 558                         the_modes[len] = '\0';
 559
 560                 if (Client_Type(Client) == CLIENT_SERVER) {
 561                         /* MODE requests for local channels from other servers
 562                          * are definitely invalid! */
 563                         if (Channel_IsLocal(Channel)) {
 564                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 565                                 return CONNECTED;
 566                         }
 567
 568                         /* Forward mode changes to channel users and all the
 569                          * other remote servers: */
 570                         IRC_WriteStrServersPrefix(Client, Origin, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args);
 571                         IRC_WriteStrChannelPrefix(Client, Channel, Origin, false, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args);
 572                 } else {
 573                         if (use_servermode)
 574                                 Origin = Client_ThisServer();
 575                         /* Send reply to client and inform other servers and channel users */
 576                         ok = IRC_WriteStrClientPrefix(Client, Origin, "MODE %s %s%s",
 577                                         Channel_Name(Channel), the_modes, the_args);
 578                         /* Only forward requests for non-local channels */
 579                         if (!Channel_IsLocal(Channel))
 580                                 IRC_WriteStrServersPrefix(Client, Origin,
 581                                         "MODE %s %s%s", Channel_Name(Channel),
 582                                         the_modes, the_args);
 583                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 584                                 false, "MODE %s %s%s", Channel_Name(Channel),
 585                                 the_modes, the_args);
 586                 }
 587         }
 588
 589         IRC_SetPenalty(Client, 1);
 590         return CONNECTED;
 591 } /* Channel_Mode */
 592
 593
 594 GLOBAL bool
 595 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 596 {
 597         assert( Client != NULL );
 598         assert( Req != NULL );
 599
 600         /* Falsche Anzahl Parameter? */
 601         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 602
 603         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 604         {
 605                 /* AWAY setzen */
 606                 Client_SetAway( Client, Req->argv[0] );
 607                 Client_ModeAdd( Client, 'a' );
 608                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 609                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 610         }
 611         else
 612         {
 613                 /* AWAY loeschen */
 614                 Client_ModeDel( Client, 'a' );
 615                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 616                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 617         }
 618 } /* IRC_AWAY */
 619
 620
 621 static bool
 622 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 623 {
 624         const char *mask;
 625         bool already;
 626         bool ret;
 627
 628         assert( Client != NULL );
 629         assert( Channel != NULL );
 630         assert( Pattern != NULL );
 631         assert(what == 'I' || what == 'b');
 632
 633         mask = Lists_MakeMask(Pattern);
 634
 635         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 636         if (!already) {
 637                 if (what == 'I')
 638                         ret = Channel_AddInvite(Channel, mask, false);
 639                 else
 640                         ret = Channel_AddBan(Channel, mask);
 641                 if (!ret)
 642                         return CONNECTED;
 643         }
 644         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 645                 return CONNECTED;
 646
 647         if (what == 'I')
 648                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 649         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 650 }
 651
 652
 653 static bool
 654 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 655 {
 656         const char *mask;
 657         struct list_head *list;
 658
 659         assert( Client != NULL );
 660         assert( Channel != NULL );
 661         assert( Pattern != NULL );
 662         assert(what == 'I' || what == 'b');
 663
 664         mask = Lists_MakeMask( Pattern );
 665
 666         if (what == 'I')
 667                 list = Channel_GetListInvites(Channel);
 668         else
 669                 list = Channel_GetListBans(Channel);
 670
 671         Lists_Del(list, mask);
 672         if (what == 'I')
 673                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 674         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 675 }
 676
 677
 678 static bool
 679 Send_ListChange( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Mask )
 680 {
 681         /* Bestaetigung an Client schicken & andere Server sowie Channel-User informieren */
 682
 683         bool ok;
 684
 685         if( Client_Type( Client ) == CLIENT_USER )
 686         {
 687                 /* Bestaetigung an Client */
 688                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 689         }
 690         else ok = true;
 691
 692         /* an andere Server */
 693         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 694
 695         /* und lokale User im Channel */
 696         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 697
 698         return ok;
 699 } /* Send_ListChange */
 700
 701
 702 /* -eof- */