src/ngircd/irc-mode.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2010 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,
  40         CLIENT *Target ));
  41 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  42         CHANNEL *Channel ));
  43
  44 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  45         CHANNEL *Channel, const char *Pattern));
  46 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  47         CHANNEL *Channel, const char *Pattern));
  48
  49 static bool Send_ListChange PARAMS((const char *Mode, CLIENT *Prefix,
  50         CLIENT *Client, CHANNEL *Channel, const 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 'c': /* Receive connect notices
 181                                    * (only settable by IRC operators!) */
 182                                 if(!set || Client_OperByMe(Origin)
 183                                    || Client_Type(Client) == CLIENT_SERVER)
 184                                         x[0] = 'c';
 185                                 else
 186                                         ok = IRC_WriteStrClient(Origin,
 187                                                         ERR_NOPRIVILEGES_MSG,
 188                                                         Client_ID(Origin));
 189                                 break;
 190                         case 'o': /* IRC operator (only unsettable!) */
 191                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 192                                 {
 193                                         Client_SetOperByMe( Target, false );
 194                                         x[0] = 'o';
 195                                 }
 196                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 197                                 break;
 198
 199                         case 'r': /* Restricted (only settable) */
 200                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 201                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 202                                 break;
 203
 204                         default:
 205                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 206                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 207                                 x[0] = '\0';
 208                                 goto client_exit;
 209                 }
 210                 if( ! ok ) break;
 211
 212                 /* Is there a valid mode change? */
 213                 if( ! x[0] ) continue;
 214
 215                 if( set )
 216                 {
 217                         /* Set mode */
 218                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 219
 220                 }
 221                 else
 222                 {
 223                         /* Unset mode */
 224                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 225                 }
 226         }
 227 client_exit:
 228
 229         /* Are there changed modes? */
 230         if( the_modes[1] )
 231         {
 232                 /* Remoce needless action modifier characters */
 233                 len = strlen( the_modes ) - 1;
 234                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 235
 236                 if( Client_Type( Client ) == CLIENT_SERVER )
 237                 {
 238                         /* Forward modes to other servers */
 239                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 240                 }
 241                 else
 242                 {
 243                         /* Send reply to client and inform other servers */
 244                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 245                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 246                 }
 247                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 248                          Client_TypeText(Target), Client_Mask(Target),
 249                          Client_Modes(Target));
 250         }
 251
 252         IRC_SetPenalty( Client, 1 );
 253         return ok;
 254 } /* Client_Mode */
 255
 256
 257 static bool
 258 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 259 {
 260         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 261         const char *mode_ptr;
 262
 263         /* Member or not? -- That's the question! */
 264         if (!Channel_IsMemberOf(Channel, Origin))
 265                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 266                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 267
 268         /* The sender is a member: generate extended reply */
 269         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 270         mode_ptr = the_modes;
 271         the_args[0] = '\0';
 272
 273         while(*mode_ptr) {
 274                 switch(*mode_ptr) {
 275                 case 'l':
 276                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 277                         strlcat(the_args, argadd, sizeof(the_args));
 278                         break;
 279                 case 'k':
 280                         strlcat(the_args, " ", sizeof(the_args));
 281                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 282                         break;
 283                 }
 284                 mode_ptr++;
 285         }
 286         if (the_args[0])
 287                 strlcat(the_modes, the_args, sizeof(the_modes));
 288
 289         return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 290                 Client_ID(Origin), Channel_Name(Channel), the_modes);
 291 }
 292
 293
 294 /**
 295  * Handle channel mode and channel-user mode changes
 296  */
 297 static bool
 298 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 299 {
 300         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 301             argadd[CLIENT_PASS_LEN], *mode_ptr;
 302         bool connected, set, modeok = true, skiponce, use_servermode = false, retval;
 303         int mode_arg, arg_arg;
 304         CLIENT *client;
 305         long l;
 306         size_t len;
 307
 308         if (Channel_IsModeless(Channel))
 309                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 310                                 Client_ID(Client), Channel_Name(Channel));
 311
 312         /* Mode request: let's answer it :-) */
 313         if (Req->argc <= 1)
 314                 return Channel_Mode_Answer_Request(Origin, Channel);
 315
 316         /* Is the user allowed to change modes? */
 317         if (Client_Type(Client) == CLIENT_USER) {
 318                 /* Is the originating user on that channel? */
 319                 if (!Channel_IsMemberOf(Channel, Origin))
 320                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 321                                 Client_ID(Origin), Channel_Name(Channel));
 322                 modeok = false;
 323                 /* channel operator? */
 324                 if (strchr(Channel_UserModes(Channel, Origin), 'o'))
 325                         modeok = true;
 326                 else if (Conf_OperCanMode) {
 327                         /* IRC-Operators can use MODE as well */
 328                         if (Client_OperByMe(Origin)) {
 329                                 modeok = true;
 330                                 if (Conf_OperServerMode)
 331                                         use_servermode = true; /* Change Origin to Server */
 332                         }
 333                 }
 334         }
 335
 336         mode_arg = 1;
 337         mode_ptr = Req->argv[mode_arg];
 338         if (Req->argc > mode_arg + 1)
 339                 arg_arg = mode_arg + 1;
 340         else
 341                 arg_arg = -1;
 342
 343         /* Initial state: set or unset modes? */
 344         skiponce = false;
 345         switch (*mode_ptr) {
 346         case '-':
 347                 set = false;
 348                 break;
 349         case '+':
 350                 set = true;
 351                 break;
 352         default:
 353                 set = true;
 354                 skiponce = true;
 355         }
 356
 357         /* Prepare reply string */
 358         strcpy(the_modes, set ? "+" : "-");
 359         the_args[0] = '\0';
 360
 361         x[1] = '\0';
 362         connected = CONNECTED;
 363         while (mode_ptr) {
 364                 if (!skiponce)
 365                         mode_ptr++;
 366                 if (!*mode_ptr) {
 367                         /* Try next argument if there's any */
 368                         if (arg_arg > mode_arg)
 369                                 mode_arg = arg_arg;
 370                         else
 371                                 mode_arg++;
 372
 373                         if (mode_arg >= Req->argc)
 374                                 break;
 375                         mode_ptr = Req->argv[mode_arg];
 376
 377                         if (Req->argc > mode_arg + 1)
 378                                 arg_arg = mode_arg + 1;
 379                         else
 380                                 arg_arg = -1;
 381                 }
 382                 skiponce = false;
 383
 384                 switch (*mode_ptr) {
 385                 case '+':
 386                 case '-':
 387                         if (((*mode_ptr == '+') && !set)
 388                             || ((*mode_ptr == '-') && set)) {
 389                                 /* Action modifier ("+"/"-") must be changed ... */
 390                                 len = strlen(the_modes) - 1;
 391                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 392                                         /* Adjust last action modifier in result */
 393                                         the_modes[len] = *mode_ptr;
 394                                 } else {
 395                                         /* Append modifier character to result string */
 396                                         x[0] = *mode_ptr;
 397                                         strlcat(the_modes, x, sizeof(the_modes));
 398                                 }
 399                                 set = *mode_ptr == '+';
 400                         }
 401                         continue;
 402                 }
 403
 404                 /* Are there arguments left? */
 405                 if (arg_arg >= Req->argc)
 406                         arg_arg = -1;
 407
 408                 /* Validate modes */
 409                 x[0] = '\0';
 410                 argadd[0] = '\0';
 411                 client = NULL;
 412                 switch (*mode_ptr) {
 413                 /* --- Channel modes --- */
 414                 case 'i': /* Invite only */
 415                 case 'm': /* Moderated */
 416                 case 'n': /* Only members can write */
 417                 case 's': /* Secret channel */
 418                 case 't': /* Topic locked */
 419                 case 'z': /* Secure connections only */
 420                         if (modeok)
 421                                 x[0] = *mode_ptr;
 422                         else
 423                                 connected = IRC_WriteStrClient(Origin,
 424                                         ERR_CHANOPRIVSNEEDED_MSG,
 425                                         Client_ID(Origin), Channel_Name(Channel));
 426                         break;
 427                 case 'k': /* Channel key */
 428                         if (!set) {
 429                                 if (modeok)
 430                                         x[0] = *mode_ptr;
 431                                 else
 432                                         connected = IRC_WriteStrClient(Origin,
 433                                                 ERR_CHANOPRIVSNEEDED_MSG,
 434                                                 Client_ID(Origin),
 435                                                 Channel_Name(Channel));
 436                                 break;
 437                         }
 438                         if (arg_arg > mode_arg) {
 439                                 if (modeok) {
 440                                         Channel_ModeDel(Channel, 'k');
 441                                         Channel_SetKey(Channel,
 442                                                        Req->argv[arg_arg]);
 443                                         strlcpy(argadd, Channel_Key(Channel),
 444                                                 sizeof(argadd));
 445                                         x[0] = *mode_ptr;
 446                                 } else {
 447                                         connected = IRC_WriteStrClient(Origin,
 448                                                 ERR_CHANOPRIVSNEEDED_MSG,
 449                                                 Client_ID(Origin),
 450                                                 Channel_Name(Channel));
 451                                 }
 452                                 Req->argv[arg_arg][0] = '\0';
 453                                 arg_arg++;
 454                         } else {
 455                                 connected = IRC_WriteStrClient(Origin,
 456                                         ERR_NEEDMOREPARAMS_MSG,
 457                                         Client_ID(Origin), Req->command);
 458                                 goto chan_exit;
 459                         }
 460                         break;
 461                 case 'l': /* Member limit */
 462                         if (!set) {
 463                                 if (modeok)
 464                                         x[0] = *mode_ptr;
 465                                 else
 466                                         connected = IRC_WriteStrClient(Origin,
 467                                                 ERR_CHANOPRIVSNEEDED_MSG,
 468                                                 Client_ID(Origin),
 469                                                 Channel_Name(Channel));
 470                                 break;
 471                         }
 472                         if (arg_arg > mode_arg) {
 473                                 if (modeok) {
 474                                         l = atol(Req->argv[arg_arg]);
 475                                         if (l > 0 && l < 0xFFFF) {
 476                                                 Channel_ModeDel(Channel, 'l');
 477                                                 Channel_SetMaxUsers(Channel, l);
 478                                                 snprintf(argadd, sizeof(argadd),
 479                                                          "%ld", l);
 480                                                 x[0] = *mode_ptr;
 481                                         }
 482                                 } else {
 483                                         connected = IRC_WriteStrClient(Origin,
 484                                                 ERR_CHANOPRIVSNEEDED_MSG,
 485                                                 Client_ID(Origin),
 486                                                 Channel_Name(Channel));
 487                                 }
 488                                 Req->argv[arg_arg][0] = '\0';
 489                                 arg_arg++;
 490                         } else {
 491                                 connected = IRC_WriteStrClient(Origin,
 492                                         ERR_NEEDMOREPARAMS_MSG,
 493                                         Client_ID(Origin), Req->command);
 494                                 goto chan_exit;
 495                         }
 496                         break;
 497                 case 'P': /* Persistent channel */
 498                         if (modeok) {
 499                                 /* Only IRC operators are allowed to
 500                                  * set the 'P' channel mode! */
 501                                 if (set && !(Client_OperByMe(Client)
 502                                     || Client_Type(Client) == CLIENT_SERVER))
 503                                         connected = IRC_WriteStrClient(Origin,
 504                                                 ERR_NOPRIVILEGES_MSG,
 505                                                 Client_ID(Origin));
 506                                 else
 507                                         x[0] = 'P';
 508                         } else
 509                                 connected = IRC_WriteStrClient(Origin,
 510                                         ERR_CHANOPRIVSNEEDED_MSG,
 511                                         Client_ID(Origin),
 512                                         Channel_Name(Channel));
 513                         break;
 514                 /* --- Channel user modes --- */
 515                 case 'o': /* Channel operator */
 516                 case 'v': /* Voice */
 517                         if (arg_arg > mode_arg) {
 518                                 if (modeok) {
 519                                         client = Client_Search(Req->argv[arg_arg]);
 520                                         if (client)
 521                                                 x[0] = *mode_ptr;
 522                                         else
 523                                                 connected = IRC_WriteStrClient(Client,
 524                                                         ERR_NOSUCHNICK_MSG,
 525                                                         Client_ID(Client),
 526                                                         Req->argv[arg_arg]);
 527                                 } else {
 528                                         connected = IRC_WriteStrClient(Origin,
 529                                                 ERR_CHANOPRIVSNEEDED_MSG,
 530                                                 Client_ID(Origin),
 531                                                 Channel_Name(Channel));
 532                                 }
 533                                 Req->argv[arg_arg][0] = '\0';
 534                                 arg_arg++;
 535                         } else {
 536                                 connected = IRC_WriteStrClient(Origin,
 537                                         ERR_NEEDMOREPARAMS_MSG,
 538                                         Client_ID(Origin), Req->command);
 539                                 goto chan_exit;
 540                         }
 541                         break;
 542                 /* --- Channel lists --- */
 543                 case 'I': /* Invite lists */
 544                 case 'b': /* Ban lists */
 545                         if (arg_arg > mode_arg) {
 546                                 /* modify list */
 547                                 if (modeok) {
 548                                         connected = set
 549                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 550                                                 Client, Channel,
 551                                                 Req->argv[arg_arg])
 552                                            : Del_Ban_Invite(*mode_ptr, Origin,
 553                                                 Client, Channel,
 554                                                 Req->argv[arg_arg]);
 555                                 } else {
 556                                         connected = IRC_WriteStrClient(Origin,
 557                                                 ERR_CHANOPRIVSNEEDED_MSG,
 558                                                 Client_ID(Origin),
 559                                                 Channel_Name(Channel));
 560                                 }
 561                                 Req->argv[arg_arg][0] = '\0';
 562                                 arg_arg++;
 563                         } else {
 564                                 if (*mode_ptr == 'I')
 565                                         Channel_ShowInvites(Origin, Channel);
 566                                 else
 567                                         Channel_ShowBans(Origin, Channel);
 568                         }
 569                         break;
 570                 default:
 571                         Log(LOG_DEBUG,
 572                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 573                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 574                             Channel_Name(Channel));
 575                         if (Client_Type(Client) != CLIENT_SERVER)
 576                                 connected = IRC_WriteStrClient(Origin,
 577                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 578                                         Client_ID(Origin),
 579                                         set ? '+' : '-', *mode_ptr);
 580                         x[0] = '\0';
 581                         goto chan_exit;
 582                 }       /* switch() */
 583
 584                 if (!connected)
 585                         break;
 586
 587                 /* Is there a valid mode change? */
 588                 if (!x[0])
 589                         continue;
 590
 591                 /* Validate target client */
 592                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 593                         if (!IRC_WriteStrClient
 594                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 595                              Client_ID(Origin), Client_ID(client),
 596                              Channel_Name(Channel)))
 597                                 break;
 598
 599                         continue;
 600                 }
 601
 602                 if (client) {
 603                         /* Channel-User-Mode */
 604                         retval = set
 605                                ? Channel_UserModeAdd(Channel, client, x[0])
 606                                : Channel_UserModeDel(Channel, client, x[0]);
 607                         if (retval) {
 608                                 strlcat(the_args, " ", sizeof(the_args));
 609                                 strlcat(the_args, Client_ID(client),
 610                                         sizeof(the_args));
 611                                 strlcat(the_modes, x, sizeof(the_modes));
 612                                 LogDebug
 613                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 614                                      Client_Mask(client), Channel_Name(Channel),
 615                                      Channel_UserModes(Channel, client));
 616                         }
 617                 } else {
 618                         /* Channel-Mode */
 619                         retval = set
 620                                ? Channel_ModeAdd(Channel, x[0])
 621                                : Channel_ModeDel(Channel, x[0]);
 622                         if (retval) {
 623                                 strlcat(the_modes, x, sizeof(the_modes));
 624                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 625                                          Channel_Name(Channel),
 626                                          Channel_Modes(Channel));
 627                         }
 628                 }
 629
 630                 /* Are there additional arguments to add? */
 631                 if (argadd[0]) {
 632                         strlcat(the_args, " ", sizeof(the_args));
 633                         strlcat(the_args, argadd, sizeof(the_args));
 634                 }
 635         }
 636
 637       chan_exit:
 638         /* Are there changed modes? */
 639         if (the_modes[1]) {
 640                 /* Clean up mode string */
 641                 len = strlen(the_modes) - 1;
 642                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 643                         the_modes[len] = '\0';
 644
 645                 if (Client_Type(Client) == CLIENT_SERVER) {
 646                         /* MODE requests for local channels from other servers
 647                          * are definitely invalid! */
 648                         if (Channel_IsLocal(Channel)) {
 649                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 650                                 return CONNECTED;
 651                         }
 652
 653                         /* Forward mode changes to channel users and all the
 654                          * other remote servers: */
 655                         IRC_WriteStrServersPrefix(Client, Origin,
 656                                 "MODE %s %s%s", Channel_Name(Channel),
 657                                 the_modes, the_args);
 658                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 659                                 false, "MODE %s %s%s", Channel_Name(Channel),
 660                                 the_modes, the_args);
 661                 } else {
 662                         if (use_servermode)
 663                                 Origin = Client_ThisServer();
 664                         /* Send reply to client and inform other servers and channel users */
 665                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 666                                         "MODE %s %s%s", Channel_Name(Channel),
 667                                         the_modes, the_args);
 668                         /* Only forward requests for non-local channels */
 669                         if (!Channel_IsLocal(Channel))
 670                                 IRC_WriteStrServersPrefix(Client, Origin,
 671                                         "MODE %s %s%s", Channel_Name(Channel),
 672                                         the_modes, the_args);
 673                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 674                                 false, "MODE %s %s%s", Channel_Name(Channel),
 675                                 the_modes, the_args);
 676                 }
 677         }
 678
 679         IRC_SetPenalty(Client, 1);
 680         return connected;
 681 } /* Channel_Mode */
 682
 683
 684 GLOBAL bool
 685 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 686 {
 687         assert( Client != NULL );
 688         assert( Req != NULL );
 689
 690         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 691
 692         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 693         {
 694                 Client_SetAway( Client, Req->argv[0] );
 695                 Client_ModeAdd( Client, 'a' );
 696                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 697                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 698         }
 699         else
 700         {
 701                 Client_ModeDel( Client, 'a' );
 702                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 703                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 704         }
 705 } /* IRC_AWAY */
 706
 707
 708 static bool
 709 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 710 {
 711         const char *mask;
 712         bool already;
 713         bool ret;
 714
 715         assert( Client != NULL );
 716         assert( Channel != NULL );
 717         assert( Pattern != NULL );
 718         assert(what == 'I' || what == 'b');
 719
 720         mask = Lists_MakeMask(Pattern);
 721
 722         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 723         if (!already) {
 724                 if (what == 'I')
 725                         ret = Channel_AddInvite(Channel, mask, false);
 726                 else
 727                         ret = Channel_AddBan(Channel, mask);
 728                 if (!ret)
 729                         return CONNECTED;
 730         }
 731         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 732                 return CONNECTED;
 733
 734         if (what == 'I')
 735                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 736         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 737 }
 738
 739
 740 static bool
 741 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 742 {
 743         const char *mask;
 744         struct list_head *list;
 745
 746         assert( Client != NULL );
 747         assert( Channel != NULL );
 748         assert( Pattern != NULL );
 749         assert(what == 'I' || what == 'b');
 750
 751         mask = Lists_MakeMask( Pattern );
 752
 753         if (what == 'I')
 754                 list = Channel_GetListInvites(Channel);
 755         else
 756                 list = Channel_GetListBans(Channel);
 757
 758         Lists_Del(list, mask);
 759         if (what == 'I')
 760                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 761         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 762 }
 763
 764
 765 static bool
 766 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 767                 CHANNEL *Channel, const char *Mask)
 768 {
 769         bool ok;
 770
 771         if( Client_Type( Client ) == CLIENT_USER )
 772         {
 773                 /* send confirmation to client */
 774                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 775         }
 776         else ok = true;
 777
 778         /* to other servers */
 779         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 780
 781         /* and local users in channel */
 782         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 783
 784         return ok;
 785 } /* Send_ListChange */
 786
 787
 788 /* -eof- */