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, skiponce, retval, onchannel;
 301         bool modeok = true, use_servermode = false;
 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                 onchannel = Channel_IsMemberOf(Channel, Origin);
 319                 modeok = false;
 320                 /* channel operator? */
 321                 if (onchannel &&
 322                     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                 if (!onchannel && !use_servermode)
 334                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 335                                 Client_ID(Origin), Channel_Name(Channel));
 336         }
 337
 338         mode_arg = 1;
 339         mode_ptr = Req->argv[mode_arg];
 340         if (Req->argc > mode_arg + 1)
 341                 arg_arg = mode_arg + 1;
 342         else
 343                 arg_arg = -1;
 344
 345         /* Initial state: set or unset modes? */
 346         skiponce = false;
 347         switch (*mode_ptr) {
 348         case '-':
 349                 set = false;
 350                 break;
 351         case '+':
 352                 set = true;
 353                 break;
 354         default:
 355                 set = true;
 356                 skiponce = true;
 357         }
 358
 359         /* Prepare reply string */
 360         strcpy(the_modes, set ? "+" : "-");
 361         the_args[0] = '\0';
 362
 363         x[1] = '\0';
 364         connected = CONNECTED;
 365         while (mode_ptr) {
 366                 if (!skiponce)
 367                         mode_ptr++;
 368                 if (!*mode_ptr) {
 369                         /* Try next argument if there's any */
 370                         if (arg_arg > mode_arg)
 371                                 mode_arg = arg_arg;
 372                         else
 373                                 mode_arg++;
 374
 375                         if (mode_arg >= Req->argc)
 376                                 break;
 377                         mode_ptr = Req->argv[mode_arg];
 378
 379                         if (Req->argc > mode_arg + 1)
 380                                 arg_arg = mode_arg + 1;
 381                         else
 382                                 arg_arg = -1;
 383                 }
 384                 skiponce = false;
 385
 386                 switch (*mode_ptr) {
 387                 case '+':
 388                 case '-':
 389                         if (((*mode_ptr == '+') && !set)
 390                             || ((*mode_ptr == '-') && set)) {
 391                                 /* Action modifier ("+"/"-") must be changed ... */
 392                                 len = strlen(the_modes) - 1;
 393                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 394                                         /* Adjust last action modifier in result */
 395                                         the_modes[len] = *mode_ptr;
 396                                 } else {
 397                                         /* Append modifier character to result string */
 398                                         x[0] = *mode_ptr;
 399                                         strlcat(the_modes, x, sizeof(the_modes));
 400                                 }
 401                                 set = *mode_ptr == '+';
 402                         }
 403                         continue;
 404                 }
 405
 406                 /* Are there arguments left? */
 407                 if (arg_arg >= Req->argc)
 408                         arg_arg = -1;
 409
 410                 /* Validate modes */
 411                 x[0] = '\0';
 412                 argadd[0] = '\0';
 413                 client = NULL;
 414                 switch (*mode_ptr) {
 415                 /* --- Channel modes --- */
 416                 case 'i': /* Invite only */
 417                 case 'm': /* Moderated */
 418                 case 'n': /* Only members can write */
 419                 case 's': /* Secret channel */
 420                 case 't': /* Topic locked */
 421                 case 'z': /* Secure connections only */
 422                         if (modeok)
 423                                 x[0] = *mode_ptr;
 424                         else
 425                                 connected = IRC_WriteStrClient(Origin,
 426                                         ERR_CHANOPRIVSNEEDED_MSG,
 427                                         Client_ID(Origin), Channel_Name(Channel));
 428                         break;
 429                 case 'k': /* Channel key */
 430                         if (!set) {
 431                                 if (modeok)
 432                                         x[0] = *mode_ptr;
 433                                 else
 434                                         connected = IRC_WriteStrClient(Origin,
 435                                                 ERR_CHANOPRIVSNEEDED_MSG,
 436                                                 Client_ID(Origin),
 437                                                 Channel_Name(Channel));
 438                                 break;
 439                         }
 440                         if (arg_arg > mode_arg) {
 441                                 if (modeok) {
 442                                         Channel_ModeDel(Channel, 'k');
 443                                         Channel_SetKey(Channel,
 444                                                        Req->argv[arg_arg]);
 445                                         strlcpy(argadd, Channel_Key(Channel),
 446                                                 sizeof(argadd));
 447                                         x[0] = *mode_ptr;
 448                                 } else {
 449                                         connected = IRC_WriteStrClient(Origin,
 450                                                 ERR_CHANOPRIVSNEEDED_MSG,
 451                                                 Client_ID(Origin),
 452                                                 Channel_Name(Channel));
 453                                 }
 454                                 Req->argv[arg_arg][0] = '\0';
 455                                 arg_arg++;
 456                         } else {
 457                                 connected = IRC_WriteStrClient(Origin,
 458                                         ERR_NEEDMOREPARAMS_MSG,
 459                                         Client_ID(Origin), Req->command);
 460                                 goto chan_exit;
 461                         }
 462                         break;
 463                 case 'l': /* Member limit */
 464                         if (!set) {
 465                                 if (modeok)
 466                                         x[0] = *mode_ptr;
 467                                 else
 468                                         connected = IRC_WriteStrClient(Origin,
 469                                                 ERR_CHANOPRIVSNEEDED_MSG,
 470                                                 Client_ID(Origin),
 471                                                 Channel_Name(Channel));
 472                                 break;
 473                         }
 474                         if (arg_arg > mode_arg) {
 475                                 if (modeok) {
 476                                         l = atol(Req->argv[arg_arg]);
 477                                         if (l > 0 && l < 0xFFFF) {
 478                                                 Channel_ModeDel(Channel, 'l');
 479                                                 Channel_SetMaxUsers(Channel, l);
 480                                                 snprintf(argadd, sizeof(argadd),
 481                                                          "%ld", l);
 482                                                 x[0] = *mode_ptr;
 483                                         }
 484                                 } else {
 485                                         connected = IRC_WriteStrClient(Origin,
 486                                                 ERR_CHANOPRIVSNEEDED_MSG,
 487                                                 Client_ID(Origin),
 488                                                 Channel_Name(Channel));
 489                                 }
 490                                 Req->argv[arg_arg][0] = '\0';
 491                                 arg_arg++;
 492                         } else {
 493                                 connected = IRC_WriteStrClient(Origin,
 494                                         ERR_NEEDMOREPARAMS_MSG,
 495                                         Client_ID(Origin), Req->command);
 496                                 goto chan_exit;
 497                         }
 498                         break;
 499                 case 'P': /* Persistent channel */
 500                         if (modeok) {
 501                                 /* Only IRC operators are allowed to
 502                                  * set the 'P' channel mode! */
 503                                 if (set && !(Client_OperByMe(Client)
 504                                     || Client_Type(Client) == CLIENT_SERVER))
 505                                         connected = IRC_WriteStrClient(Origin,
 506                                                 ERR_NOPRIVILEGES_MSG,
 507                                                 Client_ID(Origin));
 508                                 else
 509                                         x[0] = 'P';
 510                         } else
 511                                 connected = IRC_WriteStrClient(Origin,
 512                                         ERR_CHANOPRIVSNEEDED_MSG,
 513                                         Client_ID(Origin),
 514                                         Channel_Name(Channel));
 515                         break;
 516                 /* --- Channel user modes --- */
 517                 case 'o': /* Channel operator */
 518                 case 'v': /* Voice */
 519                         if (arg_arg > mode_arg) {
 520                                 if (modeok) {
 521                                         client = Client_Search(Req->argv[arg_arg]);
 522                                         if (client)
 523                                                 x[0] = *mode_ptr;
 524                                         else
 525                                                 connected = IRC_WriteStrClient(Client,
 526                                                         ERR_NOSUCHNICK_MSG,
 527                                                         Client_ID(Client),
 528                                                         Req->argv[arg_arg]);
 529                                 } else {
 530                                         connected = IRC_WriteStrClient(Origin,
 531                                                 ERR_CHANOPRIVSNEEDED_MSG,
 532                                                 Client_ID(Origin),
 533                                                 Channel_Name(Channel));
 534                                 }
 535                                 Req->argv[arg_arg][0] = '\0';
 536                                 arg_arg++;
 537                         } else {
 538                                 connected = IRC_WriteStrClient(Origin,
 539                                         ERR_NEEDMOREPARAMS_MSG,
 540                                         Client_ID(Origin), Req->command);
 541                                 goto chan_exit;
 542                         }
 543                         break;
 544                 /* --- Channel lists --- */
 545                 case 'I': /* Invite lists */
 546                 case 'b': /* Ban lists */
 547                         if (arg_arg > mode_arg) {
 548                                 /* modify list */
 549                                 if (modeok) {
 550                                         connected = set
 551                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 552                                                 Client, Channel,
 553                                                 Req->argv[arg_arg])
 554                                            : Del_Ban_Invite(*mode_ptr, Origin,
 555                                                 Client, Channel,
 556                                                 Req->argv[arg_arg]);
 557                                 } else {
 558                                         connected = IRC_WriteStrClient(Origin,
 559                                                 ERR_CHANOPRIVSNEEDED_MSG,
 560                                                 Client_ID(Origin),
 561                                                 Channel_Name(Channel));
 562                                 }
 563                                 Req->argv[arg_arg][0] = '\0';
 564                                 arg_arg++;
 565                         } else {
 566                                 if (*mode_ptr == 'I')
 567                                         Channel_ShowInvites(Origin, Channel);
 568                                 else
 569                                         Channel_ShowBans(Origin, Channel);
 570                         }
 571                         break;
 572                 default:
 573                         Log(LOG_DEBUG,
 574                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 575                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 576                             Channel_Name(Channel));
 577                         if (Client_Type(Client) != CLIENT_SERVER)
 578                                 connected = IRC_WriteStrClient(Origin,
 579                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 580                                         Client_ID(Origin),
 581                                         set ? '+' : '-', *mode_ptr);
 582                         x[0] = '\0';
 583                         goto chan_exit;
 584                 }       /* switch() */
 585
 586                 if (!connected)
 587                         break;
 588
 589                 /* Is there a valid mode change? */
 590                 if (!x[0])
 591                         continue;
 592
 593                 /* Validate target client */
 594                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 595                         if (!IRC_WriteStrClient
 596                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 597                              Client_ID(Origin), Client_ID(client),
 598                              Channel_Name(Channel)))
 599                                 break;
 600
 601                         continue;
 602                 }
 603
 604                 if (client) {
 605                         /* Channel-User-Mode */
 606                         retval = set
 607                                ? Channel_UserModeAdd(Channel, client, x[0])
 608                                : Channel_UserModeDel(Channel, client, x[0]);
 609                         if (retval) {
 610                                 strlcat(the_args, " ", sizeof(the_args));
 611                                 strlcat(the_args, Client_ID(client),
 612                                         sizeof(the_args));
 613                                 strlcat(the_modes, x, sizeof(the_modes));
 614                                 LogDebug
 615                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 616                                      Client_Mask(client), Channel_Name(Channel),
 617                                      Channel_UserModes(Channel, client));
 618                         }
 619                 } else {
 620                         /* Channel-Mode */
 621                         retval = set
 622                                ? Channel_ModeAdd(Channel, x[0])
 623                                : Channel_ModeDel(Channel, x[0]);
 624                         if (retval) {
 625                                 strlcat(the_modes, x, sizeof(the_modes));
 626                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 627                                          Channel_Name(Channel),
 628                                          Channel_Modes(Channel));
 629                         }
 630                 }
 631
 632                 /* Are there additional arguments to add? */
 633                 if (argadd[0]) {
 634                         strlcat(the_args, " ", sizeof(the_args));
 635                         strlcat(the_args, argadd, sizeof(the_args));
 636                 }
 637         }
 638
 639       chan_exit:
 640         /* Are there changed modes? */
 641         if (the_modes[1]) {
 642                 /* Clean up mode string */
 643                 len = strlen(the_modes) - 1;
 644                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 645                         the_modes[len] = '\0';
 646
 647                 if (Client_Type(Client) == CLIENT_SERVER) {
 648                         /* MODE requests for local channels from other servers
 649                          * are definitely invalid! */
 650                         if (Channel_IsLocal(Channel)) {
 651                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 652                                 return CONNECTED;
 653                         }
 654
 655                         /* Forward mode changes to channel users and all the
 656                          * other remote servers: */
 657                         IRC_WriteStrServersPrefix(Client, Origin,
 658                                 "MODE %s %s%s", Channel_Name(Channel),
 659                                 the_modes, the_args);
 660                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 661                                 false, "MODE %s %s%s", Channel_Name(Channel),
 662                                 the_modes, the_args);
 663                 } else {
 664                         if (use_servermode)
 665                                 Origin = Client_ThisServer();
 666                         /* Send reply to client and inform other servers and channel users */
 667                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 668                                         "MODE %s %s%s", Channel_Name(Channel),
 669                                         the_modes, the_args);
 670                         /* Only forward requests for non-local channels */
 671                         if (!Channel_IsLocal(Channel))
 672                                 IRC_WriteStrServersPrefix(Client, Origin,
 673                                         "MODE %s %s%s", Channel_Name(Channel),
 674                                         the_modes, the_args);
 675                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 676                                 false, "MODE %s %s%s", Channel_Name(Channel),
 677                                 the_modes, the_args);
 678                 }
 679         }
 680
 681         IRC_SetPenalty(Client, 1);
 682         return connected;
 683 } /* Channel_Mode */
 684
 685
 686 GLOBAL bool
 687 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 688 {
 689         assert( Client != NULL );
 690         assert( Req != NULL );
 691
 692         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 693
 694         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 695         {
 696                 Client_SetAway( Client, Req->argv[0] );
 697                 Client_ModeAdd( Client, 'a' );
 698                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 699                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 700         }
 701         else
 702         {
 703                 Client_ModeDel( Client, 'a' );
 704                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 705                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 706         }
 707 } /* IRC_AWAY */
 708
 709
 710 static bool
 711 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 712 {
 713         const char *mask;
 714         bool already;
 715         bool ret;
 716
 717         assert( Client != NULL );
 718         assert( Channel != NULL );
 719         assert( Pattern != NULL );
 720         assert(what == 'I' || what == 'b');
 721
 722         mask = Lists_MakeMask(Pattern);
 723
 724         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 725         if (!already) {
 726                 if (what == 'I')
 727                         ret = Channel_AddInvite(Channel, mask, false);
 728                 else
 729                         ret = Channel_AddBan(Channel, mask);
 730                 if (!ret)
 731                         return CONNECTED;
 732         }
 733         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 734                 return CONNECTED;
 735
 736         if (what == 'I')
 737                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 738         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 739 }
 740
 741
 742 static bool
 743 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 744 {
 745         const char *mask;
 746         struct list_head *list;
 747
 748         assert( Client != NULL );
 749         assert( Channel != NULL );
 750         assert( Pattern != NULL );
 751         assert(what == 'I' || what == 'b');
 752
 753         mask = Lists_MakeMask( Pattern );
 754
 755         if (what == 'I')
 756                 list = Channel_GetListInvites(Channel);
 757         else
 758                 list = Channel_GetListBans(Channel);
 759
 760         Lists_Del(list, mask);
 761         if (what == 'I')
 762                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 763         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 764 }
 765
 766
 767 static bool
 768 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 769                 CHANNEL *Channel, const char *Mask)
 770 {
 771         bool ok;
 772
 773         if( Client_Type( Client ) == CLIENT_USER )
 774         {
 775                 /* send confirmation to client */
 776                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 777         }
 778         else ok = true;
 779
 780         /* to other servers */
 781         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 782
 783         /* and local users in channel */
 784         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 785
 786         return ok;
 787 } /* Send_ListChange */
 788
 789
 790 /* -eof- */