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 "channel.h"
  26 #include "irc-write.h"
  27 #include "lists.h"
  28 #include "log.h"
  29 #include "parse.h"
  30 #include "messages.h"
  31 #include "conf.h"
  32
  33 #include "exp.h"
  34 #include "irc-mode.h"
  35
  36
  37 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  38         CLIENT *Target ));
  39 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  40         CHANNEL *Channel ));
  41
  42 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  43         CHANNEL *Channel, const char *Pattern));
  44 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  45         CHANNEL *Channel, const char *Pattern));
  46
  47 static bool Send_ListChange PARAMS((const char *Mode, CLIENT *Prefix,
  48         CLIENT *Client, CHANNEL *Channel, const char *Mask));
  49
  50
  51 GLOBAL bool
  52 IRC_MODE( CLIENT *Client, REQUEST *Req )
  53 {
  54         CLIENT *cl, *origin;
  55         CHANNEL *chan;
  56
  57         assert( Client != NULL );
  58         assert( Req != NULL );
  59
  60         /* No parameters? */
  61         if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  62
  63         /* Origin for answers */
  64         if( Client_Type( Client ) == CLIENT_SERVER )
  65         {
  66                 origin = Client_Search( Req->prefix );
  67                 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  68         }
  69         else origin = Client;
  70
  71         /* Channel or user mode? */
  72         cl = NULL; chan = NULL;
  73         if (Client_IsValidNick(Req->argv[0]))
  74                 cl = Client_Search(Req->argv[0]);
  75         if (Channel_IsValidName(Req->argv[0]))
  76                 chan = Channel_Search(Req->argv[0]);
  77
  78         if (cl)
  79                 return Client_Mode(Client, Req, origin, cl);
  80         if (chan)
  81                 return Channel_Mode(Client, Req, origin, chan);
  82
  83         /* No target found! */
  84         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  85                         Client_ID(Client), Req->argv[0]);
  86 } /* IRC_MODE */
  87
  88
  89 static bool
  90 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
  91 {
  92         /* Handle client mode requests */
  93
  94         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
  95         bool ok, set;
  96         int mode_arg;
  97         size_t len;
  98
  99         /* Is the client allowed to request or change the modes? */
 100         if( Client_Type( Client ) == CLIENT_USER )
 101         {
 102                 /* Users are only allowed to manipulate their own modes! */
 103                 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
 104         }
 105
 106         /* Mode request: let's answer it :-) */
 107         if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
 108
 109         mode_arg = 1;
 110         mode_ptr = Req->argv[mode_arg];
 111
 112         /* Initial state: set or unset modes? */
 113         if( *mode_ptr == '+' ) set = true;
 114         else if( *mode_ptr == '-' ) set = false;
 115         else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
 116
 117         /* Prepare reply string */
 118         if( set ) strcpy( the_modes, "+" );
 119         else strcpy( the_modes, "-" );
 120
 121         x[1] = '\0';
 122         ok = CONNECTED;
 123         while( mode_ptr )
 124         {
 125                 mode_ptr++;
 126                 if( ! *mode_ptr )
 127                 {
 128                         /* Try next argument if there's any */
 129                         mode_arg++;
 130                         if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
 131                         else break;
 132                 }
 133
 134                 switch( *mode_ptr )
 135                 {
 136                         case '+':
 137                         case '-':
 138                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 139                                 {
 140                                         /* Action modifier ("+"/"-") must be changed ... */
 141                                         len = strlen( the_modes ) - 1;
 142                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 143                                         {
 144                                                 /* Adjust last action modifier in result */
 145                                                 the_modes[len] = *mode_ptr;
 146                                         }
 147                                         else
 148                                         {
 149                                                 /* Append modifier character to result string */
 150                                                 x[0] = *mode_ptr;
 151                                                 strlcat( the_modes, x, sizeof( the_modes ));
 152                                         }
 153                                         if( *mode_ptr == '+' ) set = true;
 154                                         else set = false;
 155                                 }
 156                                 continue;
 157                 }
 158
 159                 /* Validate modes */
 160                 x[0] = '\0';
 161                 switch( *mode_ptr )
 162                 {
 163                         case 'i': /* Invisible */
 164                         case 's': /* Server messages */
 165                         case 'w': /* Wallops messages */
 166                                 x[0] = *mode_ptr;
 167                                 break;
 168
 169                         case 'a': /* Away */
 170                                 if( Client_Type( Client ) == CLIENT_SERVER )
 171                                 {
 172                                         x[0] = 'a';
 173                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 174                                 }
 175                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 176                                 break;
 177
 178                         case 'c': /* Receive connect notices
 179                                    * (only settable by IRC operators!) */
 180                                 if(!set || Client_OperByMe(Origin)
 181                                    || Client_Type(Client) == CLIENT_SERVER)
 182                                         x[0] = 'c';
 183                                 else
 184                                         ok = IRC_WriteStrClient(Origin,
 185                                                         ERR_NOPRIVILEGES_MSG,
 186                                                         Client_ID(Origin));
 187                                 break;
 188                         case 'o': /* IRC operator (only unsettable!) */
 189                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 190                                 {
 191                                         Client_SetOperByMe( Target, false );
 192                                         x[0] = 'o';
 193                                 }
 194                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 195                                 break;
 196
 197                         case 'r': /* Restricted (only settable) */
 198                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 199                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 200                                 break;
 201
 202                         default:
 203                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 204                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 205                                 x[0] = '\0';
 206                                 goto client_exit;
 207                 }
 208                 if( ! ok ) break;
 209
 210                 /* Is there a valid mode change? */
 211                 if( ! x[0] ) continue;
 212
 213                 if( set )
 214                 {
 215                         /* Set mode */
 216                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 217
 218                 }
 219                 else
 220                 {
 221                         /* Unset mode */
 222                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 223                 }
 224         }
 225 client_exit:
 226
 227         /* Are there changed modes? */
 228         if( the_modes[1] )
 229         {
 230                 /* Remoce needless action modifier characters */
 231                 len = strlen( the_modes ) - 1;
 232                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 233
 234                 if( Client_Type( Client ) == CLIENT_SERVER )
 235                 {
 236                         /* Forward modes to other servers */
 237                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 238                 }
 239                 else
 240                 {
 241                         /* Send reply to client and inform other servers */
 242                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 243                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 244                 }
 245                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 246                          Client_TypeText(Target), Client_Mask(Target),
 247                          Client_Modes(Target));
 248         }
 249
 250         IRC_SetPenalty( Client, 1 );
 251         return ok;
 252 } /* Client_Mode */
 253
 254
 255 static bool
 256 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 257 {
 258         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 259         const char *mode_ptr;
 260
 261         /* Member or not? -- That's the question! */
 262         if (!Channel_IsMemberOf(Channel, Origin))
 263                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 264                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 265
 266         /* The sender is a member: generate extended reply */
 267         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 268         mode_ptr = the_modes;
 269         the_args[0] = '\0';
 270
 271         while(*mode_ptr) {
 272                 switch(*mode_ptr) {
 273                 case 'l':
 274                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 275                         strlcat(the_args, argadd, sizeof(the_args));
 276                         break;
 277                 case 'k':
 278                         strlcat(the_args, " ", sizeof(the_args));
 279                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 280                         break;
 281                 }
 282                 mode_ptr++;
 283         }
 284         if (the_args[0])
 285                 strlcat(the_modes, the_args, sizeof(the_modes));
 286
 287         return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 288                 Client_ID(Origin), Channel_Name(Channel), the_modes);
 289 }
 290
 291
 292 /**
 293  * Handle channel mode and channel-user mode changes
 294  */
 295 static bool
 296 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 297 {
 298         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 299             argadd[CLIENT_PASS_LEN], *mode_ptr;
 300         bool connected, set, modeok = true, skiponce, use_servermode = false, retval;
 301         int mode_arg, arg_arg;
 302         CLIENT *client;
 303         long l;
 304         size_t len;
 305
 306         if (Channel_IsModeless(Channel))
 307                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 308                                 Client_ID(Client), Channel_Name(Channel));
 309
 310         /* Mode request: let's answer it :-) */
 311         if (Req->argc <= 1)
 312                 return Channel_Mode_Answer_Request(Origin, Channel);
 313
 314         /* Is the user allowed to change modes? */
 315         if (Client_Type(Client) == CLIENT_USER) {
 316                 /* Is the originating user on that channel? */
 317                 if (!Channel_IsMemberOf(Channel, Origin))
 318                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 319                                 Client_ID(Origin), Channel_Name(Channel));
 320                 modeok = false;
 321                 /* channel operator? */
 322                 if (strchr(Channel_UserModes(Channel, Origin), 'o'))
 323                         modeok = true;
 324                 else if (Conf_OperCanMode) {
 325                         /* IRC-Operators can use MODE as well */
 326                         if (Client_OperByMe(Origin)) {
 327                                 modeok = true;
 328                                 if (Conf_OperServerMode)
 329                                         use_servermode = true; /* Change Origin to Server */
 330                         }
 331                 }
 332         }
 333
 334         mode_arg = 1;
 335         mode_ptr = Req->argv[mode_arg];
 336         if (Req->argc > mode_arg + 1)
 337                 arg_arg = mode_arg + 1;
 338         else
 339                 arg_arg = -1;
 340
 341         /* Initial state: set or unset modes? */
 342         skiponce = false;
 343         switch (*mode_ptr) {
 344         case '-':
 345                 set = false;
 346                 break;
 347         case '+':
 348                 set = true;
 349                 break;
 350         default:
 351                 set = true;
 352                 skiponce = true;
 353         }
 354
 355         /* Prepare reply string */
 356         strcpy(the_modes, set ? "+" : "-");
 357         the_args[0] = '\0';
 358
 359         x[1] = '\0';
 360         connected = CONNECTED;
 361         while (mode_ptr) {
 362                 if (!skiponce)
 363                         mode_ptr++;
 364                 if (!*mode_ptr) {
 365                         /* Try next argument if there's any */
 366                         if (arg_arg > mode_arg)
 367                                 mode_arg = arg_arg;
 368                         else
 369                                 mode_arg++;
 370
 371                         if (mode_arg >= Req->argc)
 372                                 break;
 373                         mode_ptr = Req->argv[mode_arg];
 374
 375                         if (Req->argc > mode_arg + 1)
 376                                 arg_arg = mode_arg + 1;
 377                         else
 378                                 arg_arg = -1;
 379                 }
 380                 skiponce = false;
 381
 382                 switch (*mode_ptr) {
 383                 case '+':
 384                 case '-':
 385                         if (((*mode_ptr == '+') && !set)
 386                             || ((*mode_ptr == '-') && set)) {
 387                                 /* Action modifier ("+"/"-") must be changed ... */
 388                                 len = strlen(the_modes) - 1;
 389                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 390                                         /* Adjust last action modifier in result */
 391                                         the_modes[len] = *mode_ptr;
 392                                 } else {
 393                                         /* Append modifier character to result string */
 394                                         x[0] = *mode_ptr;
 395                                         strlcat(the_modes, x, sizeof(the_modes));
 396                                 }
 397                                 set = *mode_ptr == '+';
 398                         }
 399                         continue;
 400                 }
 401
 402                 /* Are there arguments left? */
 403                 if (arg_arg >= Req->argc)
 404                         arg_arg = -1;
 405
 406                 /* Validate modes */
 407                 x[0] = '\0';
 408                 argadd[0] = '\0';
 409                 client = NULL;
 410                 switch (*mode_ptr) {
 411                 /* --- Channel modes --- */
 412                 case 'i': /* Invite only */
 413                 case 'm': /* Moderated */
 414                 case 'n': /* Only members can write */
 415                 case 's': /* Secret channel */
 416                 case 't': /* Topic locked */
 417                 case 'z': /* Secure connections only */
 418                         if (modeok)
 419                                 x[0] = *mode_ptr;
 420                         else
 421                                 connected = IRC_WriteStrClient(Origin,
 422                                         ERR_CHANOPRIVSNEEDED_MSG,
 423                                         Client_ID(Origin), Channel_Name(Channel));
 424                         break;
 425                 case 'k': /* Channel key */
 426                         if (!set) {
 427                                 if (modeok)
 428                                         x[0] = *mode_ptr;
 429                                 else
 430                                         connected = IRC_WriteStrClient(Origin,
 431                                                 ERR_CHANOPRIVSNEEDED_MSG,
 432                                                 Client_ID(Origin),
 433                                                 Channel_Name(Channel));
 434                                 break;
 435                         }
 436                         if (arg_arg > mode_arg) {
 437                                 if (modeok) {
 438                                         Channel_ModeDel(Channel, 'k');
 439                                         Channel_SetKey(Channel,
 440                                                        Req->argv[arg_arg]);
 441                                         strlcpy(argadd, Channel_Key(Channel),
 442                                                 sizeof(argadd));
 443                                         x[0] = *mode_ptr;
 444                                 } else {
 445                                         connected = IRC_WriteStrClient(Origin,
 446                                                 ERR_CHANOPRIVSNEEDED_MSG,
 447                                                 Client_ID(Origin),
 448                                                 Channel_Name(Channel));
 449                                 }
 450                                 Req->argv[arg_arg][0] = '\0';
 451                                 arg_arg++;
 452                         } else {
 453                                 connected = IRC_WriteStrClient(Origin,
 454                                         ERR_NEEDMOREPARAMS_MSG,
 455                                         Client_ID(Origin), Req->command);
 456                                 goto chan_exit;
 457                         }
 458                         break;
 459                 case 'l': /* Member limit */
 460                         if (!set) {
 461                                 if (modeok)
 462                                         x[0] = *mode_ptr;
 463                                 else
 464                                         connected = IRC_WriteStrClient(Origin,
 465                                                 ERR_CHANOPRIVSNEEDED_MSG,
 466                                                 Client_ID(Origin),
 467                                                 Channel_Name(Channel));
 468                                 break;
 469                         }
 470                         if (arg_arg > mode_arg) {
 471                                 if (modeok) {
 472                                         l = atol(Req->argv[arg_arg]);
 473                                         if (l > 0 && l < 0xFFFF) {
 474                                                 Channel_ModeDel(Channel, 'l');
 475                                                 Channel_SetMaxUsers(Channel, l);
 476                                                 snprintf(argadd, sizeof(argadd),
 477                                                          "%ld", l);
 478                                                 x[0] = *mode_ptr;
 479                                         }
 480                                 } else {
 481                                         connected = IRC_WriteStrClient(Origin,
 482                                                 ERR_CHANOPRIVSNEEDED_MSG,
 483                                                 Client_ID(Origin),
 484                                                 Channel_Name(Channel));
 485                                 }
 486                                 Req->argv[arg_arg][0] = '\0';
 487                                 arg_arg++;
 488                         } else {
 489                                 connected = IRC_WriteStrClient(Origin,
 490                                         ERR_NEEDMOREPARAMS_MSG,
 491                                         Client_ID(Origin), Req->command);
 492                                 goto chan_exit;
 493                         }
 494                         break;
 495                 case 'P': /* Persistent channel */
 496                         if (modeok) {
 497                                 /* Only IRC operators are allowed to
 498                                  * set the 'P' channel mode! */
 499                                 if (set && !(Client_OperByMe(Client)
 500                                     || Client_Type(Client) == CLIENT_SERVER))
 501                                         connected = IRC_WriteStrClient(Origin,
 502                                                 ERR_NOPRIVILEGES_MSG,
 503                                                 Client_ID(Origin));
 504                                 else
 505                                         x[0] = 'P';
 506                         } else
 507                                 connected = IRC_WriteStrClient(Origin,
 508                                         ERR_CHANOPRIVSNEEDED_MSG,
 509                                         Client_ID(Origin),
 510                                         Channel_Name(Channel));
 511                         break;
 512                 /* --- Channel user modes --- */
 513                 case 'o': /* Channel operator */
 514                 case 'v': /* Voice */
 515                         if (arg_arg > mode_arg) {
 516                                 if (modeok) {
 517                                         client = Client_Search(Req->argv[arg_arg]);
 518                                         if (client)
 519                                                 x[0] = *mode_ptr;
 520                                         else
 521                                                 connected = IRC_WriteStrClient(Client,
 522                                                         ERR_NOSUCHNICK_MSG,
 523                                                         Client_ID(Client),
 524                                                         Req->argv[arg_arg]);
 525                                 } else {
 526                                         connected = IRC_WriteStrClient(Origin,
 527                                                 ERR_CHANOPRIVSNEEDED_MSG,
 528                                                 Client_ID(Origin),
 529                                                 Channel_Name(Channel));
 530                                 }
 531                                 Req->argv[arg_arg][0] = '\0';
 532                                 arg_arg++;
 533                         } else {
 534                                 connected = IRC_WriteStrClient(Origin,
 535                                         ERR_NEEDMOREPARAMS_MSG,
 536                                         Client_ID(Origin), Req->command);
 537                                 goto chan_exit;
 538                         }
 539                         break;
 540                 /* --- Channel lists --- */
 541                 case 'I': /* Invite lists */
 542                 case 'b': /* Ban lists */
 543                         if (arg_arg > mode_arg) {
 544                                 /* modify list */
 545                                 if (modeok) {
 546                                         connected = set
 547                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 548                                                 Client, Channel,
 549                                                 Req->argv[arg_arg])
 550                                            : Del_Ban_Invite(*mode_ptr, Origin,
 551                                                 Client, Channel,
 552                                                 Req->argv[arg_arg]);
 553                                 } else {
 554                                         connected = IRC_WriteStrClient(Origin,
 555                                                 ERR_CHANOPRIVSNEEDED_MSG,
 556                                                 Client_ID(Origin),
 557                                                 Channel_Name(Channel));
 558                                 }
 559                                 Req->argv[arg_arg][0] = '\0';
 560                                 arg_arg++;
 561                         } else {
 562                                 if (*mode_ptr == 'I')
 563                                         Channel_ShowInvites(Origin, Channel);
 564                                 else
 565                                         Channel_ShowBans(Origin, Channel);
 566                         }
 567                         break;
 568                 default:
 569                         Log(LOG_DEBUG,
 570                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 571                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 572                             Channel_Name(Channel));
 573                         if (Client_Type(Client) != CLIENT_SERVER)
 574                                 connected = IRC_WriteStrClient(Origin,
 575                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 576                                         Client_ID(Origin),
 577                                         set ? '+' : '-', *mode_ptr);
 578                         x[0] = '\0';
 579                         goto chan_exit;
 580                 }       /* switch() */
 581
 582                 if (!connected)
 583                         break;
 584
 585                 /* Is there a valid mode change? */
 586                 if (!x[0])
 587                         continue;
 588
 589                 /* Validate target client */
 590                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 591                         if (!IRC_WriteStrClient
 592                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 593                              Client_ID(Origin), Client_ID(client),
 594                              Channel_Name(Channel)))
 595                                 break;
 596
 597                         continue;
 598                 }
 599
 600                 if (client) {
 601                         /* Channel-User-Mode */
 602                         retval = set
 603                                ? Channel_UserModeAdd(Channel, client, x[0])
 604                                : Channel_UserModeDel(Channel, client, x[0]);
 605                         if (retval) {
 606                                 strlcat(the_args, " ", sizeof(the_args));
 607                                 strlcat(the_args, Client_ID(client),
 608                                         sizeof(the_args));
 609                                 strlcat(the_modes, x, sizeof(the_modes));
 610                                 LogDebug
 611                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 612                                      Client_Mask(client), Channel_Name(Channel),
 613                                      Channel_UserModes(Channel, client));
 614                         }
 615                 } else {
 616                         /* Channel-Mode */
 617                         retval = set
 618                                ? Channel_ModeAdd(Channel, x[0])
 619                                : Channel_ModeDel(Channel, x[0]);
 620                         if (retval) {
 621                                 strlcat(the_modes, x, sizeof(the_modes));
 622                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 623                                          Channel_Name(Channel),
 624                                          Channel_Modes(Channel));
 625                         }
 626                 }
 627
 628                 /* Are there additional arguments to add? */
 629                 if (argadd[0]) {
 630                         strlcat(the_args, " ", sizeof(the_args));
 631                         strlcat(the_args, argadd, sizeof(the_args));
 632                 }
 633         }
 634
 635       chan_exit:
 636         /* Are there changed modes? */
 637         if (the_modes[1]) {
 638                 /* Clean up mode string */
 639                 len = strlen(the_modes) - 1;
 640                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 641                         the_modes[len] = '\0';
 642
 643                 if (Client_Type(Client) == CLIENT_SERVER) {
 644                         /* MODE requests for local channels from other servers
 645                          * are definitely invalid! */
 646                         if (Channel_IsLocal(Channel)) {
 647                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 648                                 return CONNECTED;
 649                         }
 650
 651                         /* Forward mode changes to channel users and all the
 652                          * other remote servers: */
 653                         IRC_WriteStrServersPrefix(Client, Origin,
 654                                 "MODE %s %s%s", Channel_Name(Channel),
 655                                 the_modes, the_args);
 656                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 657                                 false, "MODE %s %s%s", Channel_Name(Channel),
 658                                 the_modes, the_args);
 659                 } else {
 660                         if (use_servermode)
 661                                 Origin = Client_ThisServer();
 662                         /* Send reply to client and inform other servers and channel users */
 663                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 664                                         "MODE %s %s%s", Channel_Name(Channel),
 665                                         the_modes, the_args);
 666                         /* Only forward requests for non-local channels */
 667                         if (!Channel_IsLocal(Channel))
 668                                 IRC_WriteStrServersPrefix(Client, Origin,
 669                                         "MODE %s %s%s", Channel_Name(Channel),
 670                                         the_modes, the_args);
 671                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 672                                 false, "MODE %s %s%s", Channel_Name(Channel),
 673                                 the_modes, the_args);
 674                 }
 675         }
 676
 677         IRC_SetPenalty(Client, 1);
 678         return connected;
 679 } /* Channel_Mode */
 680
 681
 682 GLOBAL bool
 683 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 684 {
 685         assert( Client != NULL );
 686         assert( Req != NULL );
 687
 688         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 689
 690         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 691         {
 692                 Client_SetAway( Client, Req->argv[0] );
 693                 Client_ModeAdd( Client, 'a' );
 694                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 695                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 696         }
 697         else
 698         {
 699                 Client_ModeDel( Client, 'a' );
 700                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 701                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 702         }
 703 } /* IRC_AWAY */
 704
 705
 706 static bool
 707 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 708 {
 709         const char *mask;
 710         bool already;
 711         bool ret;
 712
 713         assert( Client != NULL );
 714         assert( Channel != NULL );
 715         assert( Pattern != NULL );
 716         assert(what == 'I' || what == 'b');
 717
 718         mask = Lists_MakeMask(Pattern);
 719
 720         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 721         if (!already) {
 722                 if (what == 'I')
 723                         ret = Channel_AddInvite(Channel, mask, false);
 724                 else
 725                         ret = Channel_AddBan(Channel, mask);
 726                 if (!ret)
 727                         return CONNECTED;
 728         }
 729         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 730                 return CONNECTED;
 731
 732         if (what == 'I')
 733                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 734         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 735 }
 736
 737
 738 static bool
 739 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 740 {
 741         const char *mask;
 742         struct list_head *list;
 743
 744         assert( Client != NULL );
 745         assert( Channel != NULL );
 746         assert( Pattern != NULL );
 747         assert(what == 'I' || what == 'b');
 748
 749         mask = Lists_MakeMask( Pattern );
 750
 751         if (what == 'I')
 752                 list = Channel_GetListInvites(Channel);
 753         else
 754                 list = Channel_GetListBans(Channel);
 755
 756         Lists_Del(list, mask);
 757         if (what == 'I')
 758                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 759         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 760 }
 761
 762
 763 static bool
 764 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 765                 CHANNEL *Channel, const char *Mask)
 766 {
 767         bool ok;
 768
 769         if( Client_Type( Client ) == CLIENT_USER )
 770         {
 771                 /* send confirmation to client */
 772                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 773         }
 774         else ok = true;
 775
 776         /* to other servers */
 777         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 778
 779         /* and local users in channel */
 780         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 781
 782         return ok;
 783 } /* Send_ListChange */
 784
 785
 786 /* -eof- */