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