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