src/ngircd/irc-mode.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2005 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 static char UNUSED id[] = "$Id: irc-mode.c,v 1.52 2008/02/24 18:44:41 fw Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "defines.h"
  26 #include "conn.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "irc-write.h"
  30 #include "lists.h"
  31 #include "log.h"
  32 #include "parse.h"
  33 #include "messages.h"
  34 #include "resolve.h"
  35 #include "conf.h"
  36
  37 #include "exp.h"
  38 #include "irc-mode.h"
  39
  40
  41 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target ));
  42 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel ));
  43
  44 static bool Add_Invite PARAMS(( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern ));
  45 static bool Add_Ban PARAMS(( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern ));
  46
  47 static bool Del_Invite PARAMS(( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern ));
  48 static bool Del_Ban PARAMS(( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern ));
  49
  50 static bool Send_ListChange PARAMS(( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Mask ));
  51
  52
  53 GLOBAL bool
  54 IRC_MODE( CLIENT *Client, REQUEST *Req )
  55 {
  56         CLIENT *cl, *origin;
  57         CHANNEL *chan;
  58
  59         assert( Client != NULL );
  60         assert( Req != NULL );
  61
  62         /* No parameters? */
  63         if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  64
  65         /* Origin for answers */
  66         if( Client_Type( Client ) == CLIENT_SERVER )
  67         {
  68                 origin = Client_Search( Req->prefix );
  69                 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  70         }
  71         else origin = Client;
  72
  73         /* Channel or user mode? */
  74         cl = NULL; chan = NULL;
  75         if (Client_IsValidNick(Req->argv[0]))
  76                 cl = Client_Search(Req->argv[0]);
  77         if (Channel_IsValidName(Req->argv[0]))
  78                 chan = Channel_Search(Req->argv[0]);
  79
  80         if (cl)
  81                 return Client_Mode(Client, Req, origin, cl);
  82         if (chan)
  83                 return Channel_Mode(Client, Req, origin, chan);
  84
  85         /* No target found! */
  86         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  87                         Client_ID(Client), Req->argv[0]);
  88 } /* IRC_MODE */
  89
  90
  91 static bool
  92 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
  93 {
  94         /* Handle client mode requests */
  95
  96         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
  97         bool ok, set;
  98         int mode_arg;
  99         size_t len;
 100
 101         /* Is the client allowed to request or change the modes? */
 102         if( Client_Type( Client ) == CLIENT_USER )
 103         {
 104                 /* Users are only allowed to manipulate their own modes! */
 105                 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
 106         }
 107
 108         /* Mode request: let's answer it :-) */
 109         if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
 110
 111         mode_arg = 1;
 112         mode_ptr = Req->argv[mode_arg];
 113
 114         /* Initial state: set or unset modes? */
 115         if( *mode_ptr == '+' ) set = true;
 116         else if( *mode_ptr == '-' ) set = false;
 117         else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
 118
 119         /* Prepare reply string */
 120         if( set ) strcpy( the_modes, "+" );
 121         else strcpy( the_modes, "-" );
 122
 123         x[1] = '\0';
 124         ok = CONNECTED;
 125         while( mode_ptr )
 126         {
 127                 mode_ptr++;
 128                 if( ! *mode_ptr )
 129                 {
 130                         /* Try next argument if there's any */
 131                         mode_arg++;
 132                         if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
 133                         else break;
 134                 }
 135
 136                 switch( *mode_ptr )
 137                 {
 138                         case '+':
 139                         case '-':
 140                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 141                                 {
 142                                         /* Action modifier ("+"/"-") must be changed ... */
 143                                         len = strlen( the_modes ) - 1;
 144                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 145                                         {
 146                                                 /* Adjust last action modifier in result */
 147                                                 the_modes[len] = *mode_ptr;
 148                                         }
 149                                         else
 150                                         {
 151                                                 /* Append modifier character to result string */
 152                                                 x[0] = *mode_ptr;
 153                                                 strlcat( the_modes, x, sizeof( the_modes ));
 154                                         }
 155                                         if( *mode_ptr == '+' ) set = true;
 156                                         else set = false;
 157                                 }
 158                                 continue;
 159                 }
 160
 161                 /* Validate modes */
 162                 x[0] = '\0';
 163                 switch( *mode_ptr )
 164                 {
 165                         case 'i': /* Invisible */
 166                         case 's': /* Server messages */
 167                         case 'w': /* Wallops messages */
 168                                 x[0] = *mode_ptr;
 169                                 break;
 170
 171                         case 'a': /* Away */
 172                                 if( Client_Type( Client ) == CLIENT_SERVER )
 173                                 {
 174                                         x[0] = 'a';
 175                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 176                                 }
 177                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 178                                 break;
 179
 180                         case 'o': /* IRC operator (only unsettable!) */
 181                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 182                                 {
 183                                         Client_SetOperByMe( Target, false );
 184                                         x[0] = 'o';
 185                                 }
 186                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 187                                 break;
 188
 189                         case 'r': /* Restricted (only settable) */
 190                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 191                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 192                                 break;
 193
 194                         default:
 195                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 196                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 197                                 x[0] = '\0';
 198                                 goto client_exit;
 199                 }
 200                 if( ! ok ) break;
 201
 202                 /* Is there a valid mode change? */
 203                 if( ! x[0] ) continue;
 204
 205                 if( set )
 206                 {
 207                         /* Set mode */
 208                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 209
 210                 }
 211                 else
 212                 {
 213                         /* Unset mode */
 214                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 215                 }
 216         }
 217 client_exit:
 218
 219         /* Are there changed modes? */
 220         if( the_modes[1] )
 221         {
 222                 /* Remoce needless action modifier characters */
 223                 len = strlen( the_modes ) - 1;
 224                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 225
 226                 if( Client_Type( Client ) == CLIENT_SERVER )
 227                 {
 228                         /* Forward modes to other servers */
 229                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 230                 }
 231                 else
 232                 {
 233                         /* Send reply to client and inform other servers */
 234                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 235                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 236                 }
 237                 Log( LOG_DEBUG, "User \"%s\": Mode change, now \"%s\".", Client_Mask( Target ), Client_Modes( Target ));
 238         }
 239
 240         IRC_SetPenalty( Client, 1 );
 241         return ok;
 242 } /* Client_Mode */
 243
 244
 245 static bool
 246 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 247 {
 248         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 249         const char *mode_ptr;
 250
 251         /* Member or not? -- That's the question! */
 252         if (!Channel_IsMemberOf(Channel, Origin))
 253                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 254                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 255
 256         /* The sender is a member: generate extended reply */
 257         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 258         mode_ptr = the_modes;
 259         the_args[0] = '\0';
 260
 261         while(*mode_ptr) {
 262                 switch(*mode_ptr) {
 263                 case 'l':
 264                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 265                         strlcat(the_args, argadd, sizeof(the_args));
 266                         break;
 267                 case 'k':
 268                         strlcat(the_args, " ", sizeof(the_args));
 269                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 270                         break;
 271                 }
 272                 mode_ptr++;
 273         }
 274         if (the_args[0])
 275                 strlcat(the_modes, the_args, sizeof(the_modes));
 276
 277         return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 278                 Client_ID(Origin), Channel_Name(Channel), the_modes);
 279 }
 280
 281
 282 static bool
 283 Channel_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel )
 284 {
 285         /* Handle channel and channel-user modes */
 286
 287         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2], argadd[CLIENT_PASS_LEN], *mode_ptr;
 288         bool ok, set, modeok = true, skiponce, use_servermode = false;
 289         int mode_arg, arg_arg;
 290         CLIENT *client;
 291         long l;
 292         size_t len;
 293
 294         /* Mode request: let's answer it :-) */
 295         if (Req->argc <= 1)
 296                 return Channel_Mode_Answer_Request(Origin, Channel);
 297
 298         /* Is the user allowed to change modes? */
 299         if (Client_Type(Client) == CLIENT_USER) {
 300                 /* Is the originating user on that channel? */
 301                 if (!Channel_IsMemberOf(Channel, Origin))
 302                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 303                                 Client_ID(Origin), Channel_Name(Channel));
 304                 modeok = false;
 305                 /* channel operator? */
 306                 if (strchr(Channel_UserModes(Channel, Origin), 'o'))
 307                         modeok = true;
 308                 else if(Conf_OperCanMode) {
 309                         /* IRC-Operators can use MODE as well */
 310                         if (Client_OperByMe(Origin)) {
 311                                 modeok = true;
 312                                 if (Conf_OperServerMode)
 313                                         use_servermode = true; /* Change Origin to Server */
 314                         }
 315                 }
 316         }
 317
 318         mode_arg = 1;
 319         mode_ptr = Req->argv[mode_arg];
 320         if (Req->argc > mode_arg + 1)
 321                 arg_arg = mode_arg + 1;
 322         else
 323                 arg_arg = -1;
 324
 325         /* Initial state: set or unset modes? */
 326         skiponce = false;
 327         switch (*mode_ptr) {
 328         case '-': set = false; break;
 329         case '+': set = true; break;
 330         default:
 331                 set = true;
 332                 skiponce = true;
 333         }
 334
 335         /* Prepare reply string */
 336         strcpy(the_modes, set ? "+" : "-");
 337         the_args[0] = '\0';
 338
 339         x[1] = '\0';
 340         ok = CONNECTED;
 341         while (mode_ptr) {
 342                 if (! skiponce)
 343                         mode_ptr++;
 344                 if (!*mode_ptr) {
 345                         /* Try next argument if there's any */
 346                         if (arg_arg > mode_arg)
 347                                 mode_arg = arg_arg;
 348                         else
 349                                 mode_arg++;
 350
 351                         if (mode_arg >= Req->argc)
 352                                 break;
 353                         mode_ptr = Req->argv[mode_arg];
 354
 355                         if (Req->argc > mode_arg + 1)
 356                                 arg_arg = mode_arg + 1;
 357                         else
 358                                 arg_arg = -1;
 359                 }
 360                 skiponce = false;
 361
 362                 switch (*mode_ptr) {
 363                 case '+':
 364                 case '-':
 365                         if (((*mode_ptr == '+') && !set) || ((*mode_ptr == '-') && set)) {
 366                                 /* Action modifier ("+"/"-") must be changed ... */
 367                                 len = strlen( the_modes ) - 1;
 368                                 if ((the_modes[len] == '+') || (the_modes[len] == '-')) {
 369                                         /* Adjust last action modifier in result */
 370                                         the_modes[len] = *mode_ptr;
 371                                 } else {
 372                                         /* Append modifier character to result string */
 373                                         x[0] = *mode_ptr;
 374                                         strlcat(the_modes, x, sizeof(the_modes));
 375                                 }
 376                                 set = *mode_ptr == '+';
 377                         }
 378                         continue;
 379                 }
 380
 381                 /* Are there arguments left? */
 382                 if( arg_arg >= Req->argc ) arg_arg = -1;
 383
 384                 /* Validate modes */
 385                 x[0] = '\0';
 386                 argadd[0] = '\0';
 387                 client = NULL;
 388                 switch( *mode_ptr )
 389                 {
 390                         /* --- Channel modes --- */
 391
 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 ) x[0] = *mode_ptr;
 398                                 else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 399                                 break;
 400
 401                         case 'k': /* Channel key */
 402                                 if( ! set )
 403                                 {
 404                                         if( modeok ) x[0] = *mode_ptr;
 405                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 406                                         break;
 407                                 }
 408                                 if( arg_arg > mode_arg )
 409                                 {
 410                                         if( modeok )
 411                                         {
 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                                         }
 417                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 418                                         Req->argv[arg_arg][0] = '\0';
 419                                         arg_arg++;
 420                                 }
 421                                 else ok = IRC_WriteStrClient( Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID( Origin ), Req->command );
 422                                 break;
 423
 424                         case 'l': /* Member limit */
 425                                 if( ! set )
 426                                 {
 427                                         if( modeok ) x[0] = *mode_ptr;
 428                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 429                                         break;
 430                                 }
 431                                 if( arg_arg > mode_arg )
 432                                 {
 433                                         if( modeok )
 434                                         {
 435                                                 l = atol( Req->argv[arg_arg] );
 436                                                 if( l > 0 && l < 0xFFFF )
 437                                                 {
 438                                                         Channel_ModeDel( Channel, 'l' );
 439                                                         Channel_SetMaxUsers( Channel, l );
 440                                                         snprintf( argadd, sizeof( argadd ), "%ld", l );
 441                                                         x[0] = *mode_ptr;
 442                                                 }
 443                                         }
 444                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 445                                         Req->argv[arg_arg][0] = '\0';
 446                                         arg_arg++;
 447                                 }
 448                                 else ok = IRC_WriteStrClient( Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID( Origin ), Req->command );
 449                                 break;
 450
 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)
 456                                             || Client_Type(Client) == CLIENT_SERVER)) {
 457                                                 ok = IRC_WriteStrClient(Origin,
 458                                                         ERR_NOPRIVILEGES_MSG,
 459                                                         Client_ID(Origin));
 460                                         } else
 461                                                 x[0] = 'P';
 462                                 } else
 463                                         ok = IRC_WriteStrClient(Origin,
 464                                                 ERR_CHANOPRIVSNEEDED_MSG,
 465                                                 Client_ID(Origin),
 466                                                 Channel_Name(Channel));
 467                                 break;
 468
 469                         /* --- Channel user modes --- */
 470
 471                         case 'o': /* Channel operator */
 472                         case 'v': /* Voice */
 473                                 if( arg_arg > mode_arg )
 474                                 {
 475                                         if( modeok )
 476                                         {
 477                                                 client = Client_Search( Req->argv[arg_arg] );
 478                                                 if( client ) x[0] = *mode_ptr;
 479                                                 else ok = IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[arg_arg] );
 480                                         }
 481                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 482                                         Req->argv[arg_arg][0] = '\0';
 483                                         arg_arg++;
 484                                 }
 485                                 else ok = IRC_WriteStrClient( Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID( Origin ), Req->command );
 486                                 break;
 487
 488                         /* --- Channel lists --- */
 489
 490                         case 'I': /* Invite lists */
 491                                 if( arg_arg > mode_arg )
 492                                 {
 493                                         /* modify list */
 494                                         if( modeok )
 495                                         {
 496                                                 if( set ) Add_Invite( Origin, Client, Channel, Req->argv[arg_arg] );
 497                                                 else Del_Invite( Origin, Client, Channel, Req->argv[arg_arg] );
 498                                         }
 499                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 500                                         Req->argv[arg_arg][0] = '\0';
 501                                         arg_arg++;
 502                                 }
 503                                 else Channel_ShowInvites( Origin, Channel );
 504                                 break;
 505
 506                         case 'b': /* Ban lists */
 507                                 if( arg_arg > mode_arg )
 508                                 {
 509                                         /* modify list */
 510                                         if( modeok )
 511                                         {
 512                                                 if( set ) Add_Ban( Origin, Client, Channel, Req->argv[arg_arg] );
 513                                                 else Del_Ban( Origin, Client, Channel, Req->argv[arg_arg] );
 514                                         }
 515                                         else ok = IRC_WriteStrClient( Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( Origin ), Channel_Name( Channel ));
 516                                         Req->argv[arg_arg][0] = '\0';
 517                                         arg_arg++;
 518                                 }
 519                                 else Channel_ShowBans( Origin, Channel );
 520                                 break;
 521
 522                         default:
 523                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\" on %s!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ), Channel_Name( Channel ));
 524                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 525                                 x[0] = '\0';
 526                                 goto chan_exit;
 527                 }
 528                 if( ! ok ) break;
 529
 530                 /* Is there a valid mode change? */
 531                 if( ! x[0] ) continue;
 532
 533                 /* Validate target client */
 534                 if( client && ( ! Channel_IsMemberOf( Channel, client )))
 535                 {
 536                         if( ! IRC_WriteStrClient( Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID( Origin ), Client_ID( client ), Channel_Name( Channel ))) break;
 537                         continue;
 538                 }
 539
 540                 if( set )
 541                 {
 542                         /* Set mode */
 543                         if( client )
 544                         {
 545                                 /* Channel-User-Mode */
 546                                 if( Channel_UserModeAdd( Channel, client, x[0] ))
 547                                 {
 548                                         strlcat( the_args, " ", sizeof( the_args ));
 549                                         strlcat( the_args, Client_ID( client ), sizeof( the_args ));
 550                                         strlcat( the_modes, x, sizeof( the_modes ));
 551                                         Log( LOG_DEBUG, "User \"%s\": Mode change on %s, now \"%s\"", Client_Mask( client ), Channel_Name( Channel ), Channel_UserModes( Channel, client ));
 552                                 }
 553                         }
 554                         else
 555                         {
 556                                 /* Channel-Mode */
 557                                 if( Channel_ModeAdd( Channel, x[0] ))
 558                                 {
 559                                         strlcat( the_modes, x, sizeof( the_modes ));
 560                                         Log( LOG_DEBUG, "Channel %s: Mode change, now \"%s\".", Channel_Name( Channel ), Channel_Modes( Channel ));
 561                                 }
 562                         }
 563                 }
 564                 else
 565                 {
 566                         /* Unset mode */
 567                         if( client )
 568                         {
 569                                 /* Channel-User-Mode */
 570                                 if( Channel_UserModeDel( Channel, client, x[0] ))
 571                                 {
 572                                         strlcat( the_args, " ", sizeof( the_args ));
 573                                         strlcat( the_args, Client_ID( client ), sizeof( the_args ));
 574                                         strlcat( the_modes, x, sizeof( the_modes ));
 575                                         Log( LOG_DEBUG, "User \"%s\": Mode change on %s, now \"%s\"", Client_Mask( client ), Channel_Name( Channel ), Channel_UserModes( Channel, client ));
 576                                 }
 577                         }
 578                         else
 579                         {
 580                                 /* Channel-Mode */
 581                                 if( Channel_ModeDel( Channel, x[0] ))
 582                                 {
 583                                         strlcat( the_modes, x, sizeof( the_modes ));
 584                                         Log( LOG_DEBUG, "Channel %s: Mode change, now \"%s\".", Channel_Name( Channel ), Channel_Modes( Channel ));
 585                                 }
 586                         }
 587                 }
 588
 589                 /* Are there additional arguments to add? */
 590                 if( argadd[0] )
 591                 {
 592                         strlcat( the_args, " ", sizeof( the_args ));
 593                         strlcat( the_args, argadd, sizeof( the_args ));
 594                 }
 595         }
 596 chan_exit:
 597
 598         /* Are there changed modes? */
 599         if (the_modes[1]) {
 600                 /* Clean up mode string */
 601                 len = strlen(the_modes) - 1;
 602                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 603                         the_modes[len] = '\0';
 604
 605                 if (Client_Type(Client) == CLIENT_SERVER) {
 606                         /* Forward mode changes to channel users and other servers */
 607                         IRC_WriteStrServersPrefix(Client, Origin, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args);
 608                         IRC_WriteStrChannelPrefix(Client, Channel, Origin, false, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args);
 609                 } else {
 610                         if (use_servermode)
 611                                 Origin = Client_ThisServer();
 612                         /* Send reply to client and inform other servers and channel users */
 613                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args );
 614                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args );
 615                         IRC_WriteStrChannelPrefix( Client, Channel, Origin, false, "MODE %s %s%s", Channel_Name( Channel ), the_modes, the_args );
 616                 }
 617         }
 618
 619         IRC_SetPenalty( Client, 1 );
 620         return CONNECTED;
 621 } /* Channel_Mode */
 622
 623
 624 GLOBAL bool
 625 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 626 {
 627         assert( Client != NULL );
 628         assert( Req != NULL );
 629
 630         /* Falsche Anzahl Parameter? */
 631         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 632
 633         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 634         {
 635                 /* AWAY setzen */
 636                 Client_SetAway( Client, Req->argv[0] );
 637                 Client_ModeAdd( Client, 'a' );
 638                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 639                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 640         }
 641         else
 642         {
 643                 /* AWAY loeschen */
 644                 Client_ModeDel( Client, 'a' );
 645                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 646                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 647         }
 648 } /* IRC_AWAY */
 649
 650
 651 static bool
 652 Add_Invite( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern )
 653 {
 654         char *mask;
 655         bool already;
 656
 657         assert( Client != NULL );
 658         assert( Channel != NULL );
 659         assert( Pattern != NULL );
 660
 661         mask = Lists_MakeMask( Pattern );
 662
 663         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask );
 664         if (!already) {
 665                 if( ! Channel_AddInvite(Channel, mask, false ))
 666                         return CONNECTED;
 667         }
 668         if ( already && ( Client_Type( Prefix ) == CLIENT_SERVER ))
 669                 return CONNECTED;
 670
 671         return Send_ListChange( "+I", Prefix, Client, Channel, mask );
 672 } /* Add_Invite */
 673
 674
 675 static bool
 676 Add_Ban( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern )
 677 {
 678         char *mask;
 679         bool already;
 680
 681         assert( Client != NULL );
 682         assert( Channel != NULL );
 683         assert( Pattern != NULL );
 684
 685         mask = Lists_MakeMask( Pattern );
 686
 687         already = Lists_CheckDupeMask(Channel_GetListBans(Channel), mask );
 688         if (!already) {
 689                 if( ! Channel_AddBan(Channel, mask))
 690                         return CONNECTED;
 691         }
 692         if ( already && ( Client_Type( Prefix ) == CLIENT_SERVER ))
 693                 return CONNECTED;
 694
 695         return Send_ListChange( "+b", Prefix, Client, Channel, mask );
 696 } /* Add_Ban */
 697
 698
 699 static bool
 700 Del_Invite( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern )
 701 {
 702         char *mask;
 703
 704         assert( Client != NULL );
 705         assert( Channel != NULL );
 706         assert( Pattern != NULL );
 707
 708         mask = Lists_MakeMask( Pattern );
 709         Lists_Del(Channel_GetListInvites(Channel), mask);
 710         return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 711 } /* Del_Invite */
 712
 713
 714 static bool
 715 Del_Ban( CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Pattern )
 716 {
 717         char *mask;
 718
 719         assert( Client != NULL );
 720         assert( Channel != NULL );
 721         assert( Pattern != NULL );
 722
 723         mask = Lists_MakeMask( Pattern );
 724         Lists_Del(Channel_GetListBans(Channel), mask);
 725         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 726 } /* Del_Ban */
 727
 728
 729 static bool
 730 Send_ListChange( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, char *Mask )
 731 {
 732         /* Bestaetigung an Client schicken & andere Server sowie Channel-User informieren */
 733
 734         bool ok;
 735
 736         if( Client_Type( Client ) == CLIENT_USER )
 737         {
 738                 /* Bestaetigung an Client */
 739                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 740         }
 741         else ok = true;
 742
 743         /* an andere Server */
 744         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 745
 746         /* und lokale User im Channel */
 747         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 748
 749         return ok;
 750 } /* Send_ListChange */
 751
 752
 753 /* -eof- */