src/ngircd/irc-mode.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors.
   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
 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                         case 'x': /* Cloak hostname */
 204                                 if (Client_HasMode(Client, 'r'))
 205                                         IRC_WriteStrClient(Origin,
 206                                                            ERR_RESTRICTED_MSG,
 207                                                            Client_ID(Origin));
 208                                 else
 209                                         x[0] = 'x';
 210                                 break;
 211
 212                         default:
 213                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 214                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 215                                 x[0] = '\0';
 216                                 goto client_exit;
 217                 }
 218                 if( ! ok ) break;
 219
 220                 /* Is there a valid mode change? */
 221                 if( ! x[0] ) continue;
 222
 223                 if( set )
 224                 {
 225                         /* Set mode */
 226                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 227
 228                 }
 229                 else
 230                 {
 231                         /* Unset mode */
 232                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 233                 }
 234         }
 235 client_exit:
 236
 237         /* Are there changed modes? */
 238         if( the_modes[1] )
 239         {
 240                 /* Remoce needless action modifier characters */
 241                 len = strlen( the_modes ) - 1;
 242                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 243
 244                 if( Client_Type( Client ) == CLIENT_SERVER )
 245                 {
 246                         /* Forward modes to other servers */
 247                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 248                 }
 249                 else
 250                 {
 251                         /* Send reply to client and inform other servers */
 252                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 253                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 254                 }
 255                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 256                          Client_TypeText(Target), Client_Mask(Target),
 257                          Client_Modes(Target));
 258         }
 259
 260         IRC_SetPenalty( Client, 1 );
 261         return ok;
 262 } /* Client_Mode */
 263
 264
 265 static bool
 266 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 267 {
 268         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 269         const char *mode_ptr;
 270
 271         /* Member or not? -- That's the question! */
 272         if (!Channel_IsMemberOf(Channel, Origin))
 273                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 274                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 275
 276         /* The sender is a member: generate extended reply */
 277         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 278         mode_ptr = the_modes;
 279         the_args[0] = '\0';
 280
 281         while(*mode_ptr) {
 282                 switch(*mode_ptr) {
 283                 case 'l':
 284                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 285                         strlcat(the_args, argadd, sizeof(the_args));
 286                         break;
 287                 case 'k':
 288                         strlcat(the_args, " ", sizeof(the_args));
 289                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 290                         break;
 291                 }
 292                 mode_ptr++;
 293         }
 294         if (the_args[0])
 295                 strlcat(the_modes, the_args, sizeof(the_modes));
 296
 297         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 298                                 Client_ID(Origin), Channel_Name(Channel),
 299                                 the_modes))
 300                 return DISCONNECTED;
 301 #ifndef STRICT_RFC
 302         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 303                                   Client_ID(Origin), Channel_Name(Channel),
 304                                   Channel_CreationTime(Channel)))
 305                 return DISCONNECTED;
 306 #endif
 307         return CONNECTED;
 308 }
 309
 310
 311 /**
 312  * Handle channel mode and channel-user mode changes
 313  */
 314 static bool
 315 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 316 {
 317         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 318             argadd[CLIENT_PASS_LEN], *mode_ptr;
 319         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 320         int mode_arg, arg_arg;
 321         CLIENT *client;
 322         long l;
 323         size_t len;
 324
 325         if (Channel_IsModeless(Channel))
 326                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 327                                 Client_ID(Client), Channel_Name(Channel));
 328
 329         /* Mode request: let's answer it :-) */
 330         if (Req->argc <= 1)
 331                 return Channel_Mode_Answer_Request(Origin, Channel);
 332
 333         Channel_CheckAdminRights(Channel, Client, Origin,
 334                                  &onchannel, &modeok, &use_servermode);
 335
 336         if (!onchannel && !modeok)
 337                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 338                                           Client_ID(Origin),
 339                                           Channel_Name(Channel));
 340
 341         mode_arg = 1;
 342         mode_ptr = Req->argv[mode_arg];
 343         if (Req->argc > mode_arg + 1)
 344                 arg_arg = mode_arg + 1;
 345         else
 346                 arg_arg = -1;
 347
 348         /* Initial state: set or unset modes? */
 349         skiponce = false;
 350         switch (*mode_ptr) {
 351         case '-':
 352                 set = false;
 353                 break;
 354         case '+':
 355                 set = true;
 356                 break;
 357         default:
 358                 set = true;
 359                 skiponce = true;
 360         }
 361
 362         /* Prepare reply string */
 363         strcpy(the_modes, set ? "+" : "-");
 364         the_args[0] = '\0';
 365
 366         x[1] = '\0';
 367         connected = CONNECTED;
 368         while (mode_ptr) {
 369                 if (!skiponce)
 370                         mode_ptr++;
 371                 if (!*mode_ptr) {
 372                         /* Try next argument if there's any */
 373                         if (arg_arg > mode_arg)
 374                                 mode_arg = arg_arg;
 375                         else
 376                                 mode_arg++;
 377
 378                         if (mode_arg >= Req->argc)
 379                                 break;
 380                         mode_ptr = Req->argv[mode_arg];
 381
 382                         if (Req->argc > mode_arg + 1)
 383                                 arg_arg = mode_arg + 1;
 384                         else
 385                                 arg_arg = -1;
 386                 }
 387                 skiponce = false;
 388
 389                 switch (*mode_ptr) {
 390                 case '+':
 391                 case '-':
 392                         if (((*mode_ptr == '+') && !set)
 393                             || ((*mode_ptr == '-') && set)) {
 394                                 /* Action modifier ("+"/"-") must be changed ... */
 395                                 len = strlen(the_modes) - 1;
 396                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 397                                         /* Adjust last action modifier in result */
 398                                         the_modes[len] = *mode_ptr;
 399                                 } else {
 400                                         /* Append modifier character to result string */
 401                                         x[0] = *mode_ptr;
 402                                         strlcat(the_modes, x, sizeof(the_modes));
 403                                 }
 404                                 set = *mode_ptr == '+';
 405                         }
 406                         continue;
 407                 }
 408
 409                 /* Are there arguments left? */
 410                 if (arg_arg >= Req->argc)
 411                         arg_arg = -1;
 412
 413                 /* Validate modes */
 414                 x[0] = '\0';
 415                 argadd[0] = '\0';
 416                 client = NULL;
 417                 switch (*mode_ptr) {
 418                 /* --- Channel modes --- */
 419                 case 'i': /* Invite only */
 420                 case 'm': /* Moderated */
 421                 case 'n': /* Only members can write */
 422                 case 's': /* Secret channel */
 423                 case 't': /* Topic locked */
 424                 case 'z': /* Secure connections only */
 425                         if (modeok)
 426                                 x[0] = *mode_ptr;
 427                         else
 428                                 connected = IRC_WriteStrClient(Origin,
 429                                         ERR_CHANOPRIVSNEEDED_MSG,
 430                                         Client_ID(Origin), Channel_Name(Channel));
 431                         break;
 432                 case 'k': /* Channel key */
 433                         if (!set) {
 434                                 if (modeok)
 435                                         x[0] = *mode_ptr;
 436                                 else
 437                                         connected = IRC_WriteStrClient(Origin,
 438                                                 ERR_CHANOPRIVSNEEDED_MSG,
 439                                                 Client_ID(Origin),
 440                                                 Channel_Name(Channel));
 441                                 break;
 442                         }
 443                         if (arg_arg > mode_arg) {
 444                                 if (modeok) {
 445                                         Channel_ModeDel(Channel, 'k');
 446                                         Channel_SetKey(Channel,
 447                                                        Req->argv[arg_arg]);
 448                                         strlcpy(argadd, Channel_Key(Channel),
 449                                                 sizeof(argadd));
 450                                         x[0] = *mode_ptr;
 451                                 } else {
 452                                         connected = IRC_WriteStrClient(Origin,
 453                                                 ERR_CHANOPRIVSNEEDED_MSG,
 454                                                 Client_ID(Origin),
 455                                                 Channel_Name(Channel));
 456                                 }
 457                                 Req->argv[arg_arg][0] = '\0';
 458                                 arg_arg++;
 459                         } else {
 460                                 connected = IRC_WriteStrClient(Origin,
 461                                         ERR_NEEDMOREPARAMS_MSG,
 462                                         Client_ID(Origin), Req->command);
 463                                 goto chan_exit;
 464                         }
 465                         break;
 466                 case 'l': /* Member limit */
 467                         if (!set) {
 468                                 if (modeok)
 469                                         x[0] = *mode_ptr;
 470                                 else
 471                                         connected = IRC_WriteStrClient(Origin,
 472                                                 ERR_CHANOPRIVSNEEDED_MSG,
 473                                                 Client_ID(Origin),
 474                                                 Channel_Name(Channel));
 475                                 break;
 476                         }
 477                         if (arg_arg > mode_arg) {
 478                                 if (modeok) {
 479                                         l = atol(Req->argv[arg_arg]);
 480                                         if (l > 0 && l < 0xFFFF) {
 481                                                 Channel_ModeDel(Channel, 'l');
 482                                                 Channel_SetMaxUsers(Channel, l);
 483                                                 snprintf(argadd, sizeof(argadd),
 484                                                          "%ld", l);
 485                                                 x[0] = *mode_ptr;
 486                                         }
 487                                 } else {
 488                                         connected = IRC_WriteStrClient(Origin,
 489                                                 ERR_CHANOPRIVSNEEDED_MSG,
 490                                                 Client_ID(Origin),
 491                                                 Channel_Name(Channel));
 492                                 }
 493                                 Req->argv[arg_arg][0] = '\0';
 494                                 arg_arg++;
 495                         } else {
 496                                 connected = IRC_WriteStrClient(Origin,
 497                                         ERR_NEEDMOREPARAMS_MSG,
 498                                         Client_ID(Origin), Req->command);
 499                                 goto chan_exit;
 500                         }
 501                         break;
 502                 case 'O': /* IRC operators only */
 503                         if (modeok) {
 504                                 /* Only IRC operators are allowed to
 505                                  * set the 'O' channel mode! */
 506                                 if (set && !(Client_OperByMe(Client)
 507                                     || Client_Type(Client) == CLIENT_SERVER))
 508                                         connected = IRC_WriteStrClient(Origin,
 509                                                 ERR_NOPRIVILEGES_MSG,
 510                                                 Client_ID(Origin));
 511                                 else
 512                                         x[0] = 'O';
 513                         } else
 514                                 connected = IRC_WriteStrClient(Origin,
 515                                                 ERR_CHANOPRIVSNEEDED_MSG,
 516                                                 Client_ID(Origin),
 517                                                 Channel_Name(Channel));
 518                                 break;
 519                 case 'P': /* Persistent channel */
 520                         if (modeok) {
 521                                 /* Only IRC operators are allowed to
 522                                  * set the 'P' channel mode! */
 523                                 if (set && !(Client_OperByMe(Client)
 524                                     || Client_Type(Client) == CLIENT_SERVER))
 525                                         connected = IRC_WriteStrClient(Origin,
 526                                                 ERR_NOPRIVILEGES_MSG,
 527                                                 Client_ID(Origin));
 528                                 else
 529                                         x[0] = 'P';
 530                         } else
 531                                 connected = IRC_WriteStrClient(Origin,
 532                                         ERR_CHANOPRIVSNEEDED_MSG,
 533                                         Client_ID(Origin),
 534                                         Channel_Name(Channel));
 535                         break;
 536                 /* --- Channel user modes --- */
 537                 case 'o': /* Channel operator */
 538                 case 'v': /* Voice */
 539                         if (arg_arg > mode_arg) {
 540                                 if (modeok) {
 541                                         client = Client_Search(Req->argv[arg_arg]);
 542                                         if (client)
 543                                                 x[0] = *mode_ptr;
 544                                         else
 545                                                 connected = IRC_WriteStrClient(Client,
 546                                                         ERR_NOSUCHNICK_MSG,
 547                                                         Client_ID(Client),
 548                                                         Req->argv[arg_arg]);
 549                                 } else {
 550                                         connected = IRC_WriteStrClient(Origin,
 551                                                 ERR_CHANOPRIVSNEEDED_MSG,
 552                                                 Client_ID(Origin),
 553                                                 Channel_Name(Channel));
 554                                 }
 555                                 Req->argv[arg_arg][0] = '\0';
 556                                 arg_arg++;
 557                         } else {
 558                                 connected = IRC_WriteStrClient(Origin,
 559                                         ERR_NEEDMOREPARAMS_MSG,
 560                                         Client_ID(Origin), Req->command);
 561                                 goto chan_exit;
 562                         }
 563                         break;
 564                 /* --- Channel lists --- */
 565                 case 'I': /* Invite lists */
 566                 case 'b': /* Ban lists */
 567                         if (arg_arg > mode_arg) {
 568                                 /* modify list */
 569                                 if (modeok) {
 570                                         connected = set
 571                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 572                                                 Client, Channel,
 573                                                 Req->argv[arg_arg])
 574                                            : Del_Ban_Invite(*mode_ptr, Origin,
 575                                                 Client, Channel,
 576                                                 Req->argv[arg_arg]);
 577                                 } else {
 578                                         connected = IRC_WriteStrClient(Origin,
 579                                                 ERR_CHANOPRIVSNEEDED_MSG,
 580                                                 Client_ID(Origin),
 581                                                 Channel_Name(Channel));
 582                                 }
 583                                 Req->argv[arg_arg][0] = '\0';
 584                                 arg_arg++;
 585                         } else {
 586                                 if (*mode_ptr == 'I')
 587                                         Channel_ShowInvites(Origin, Channel);
 588                                 else
 589                                         Channel_ShowBans(Origin, Channel);
 590                         }
 591                         break;
 592                 default:
 593                         Log(LOG_DEBUG,
 594                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 595                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 596                             Channel_Name(Channel));
 597                         if (Client_Type(Client) != CLIENT_SERVER)
 598                                 connected = IRC_WriteStrClient(Origin,
 599                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 600                                         Client_ID(Origin),
 601                                         set ? '+' : '-', *mode_ptr);
 602                         x[0] = '\0';
 603                         goto chan_exit;
 604                 }       /* switch() */
 605
 606                 if (!connected)
 607                         break;
 608
 609                 /* Is there a valid mode change? */
 610                 if (!x[0])
 611                         continue;
 612
 613                 /* Validate target client */
 614                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 615                         if (!IRC_WriteStrClient
 616                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 617                              Client_ID(Origin), Client_ID(client),
 618                              Channel_Name(Channel)))
 619                                 break;
 620
 621                         continue;
 622                 }
 623
 624                 if (client) {
 625                         /* Channel-User-Mode */
 626                         retval = set
 627                                ? Channel_UserModeAdd(Channel, client, x[0])
 628                                : Channel_UserModeDel(Channel, client, x[0]);
 629                         if (retval) {
 630                                 strlcat(the_args, " ", sizeof(the_args));
 631                                 strlcat(the_args, Client_ID(client),
 632                                         sizeof(the_args));
 633                                 strlcat(the_modes, x, sizeof(the_modes));
 634                                 LogDebug
 635                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 636                                      Client_Mask(client), Channel_Name(Channel),
 637                                      Channel_UserModes(Channel, client));
 638                         }
 639                 } else {
 640                         /* Channel-Mode */
 641                         retval = set
 642                                ? Channel_ModeAdd(Channel, x[0])
 643                                : Channel_ModeDel(Channel, x[0]);
 644                         if (retval) {
 645                                 strlcat(the_modes, x, sizeof(the_modes));
 646                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 647                                          Channel_Name(Channel),
 648                                          Channel_Modes(Channel));
 649                         }
 650                 }
 651
 652                 /* Are there additional arguments to add? */
 653                 if (argadd[0]) {
 654                         strlcat(the_args, " ", sizeof(the_args));
 655                         strlcat(the_args, argadd, sizeof(the_args));
 656                 }
 657         }
 658
 659       chan_exit:
 660         /* Are there changed modes? */
 661         if (the_modes[1]) {
 662                 /* Clean up mode string */
 663                 len = strlen(the_modes) - 1;
 664                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 665                         the_modes[len] = '\0';
 666
 667                 if (Client_Type(Client) == CLIENT_SERVER) {
 668                         /* MODE requests for local channels from other servers
 669                          * are definitely invalid! */
 670                         if (Channel_IsLocal(Channel)) {
 671                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 672                                 return CONNECTED;
 673                         }
 674
 675                         /* Forward mode changes to channel users and all the
 676                          * other remote servers: */
 677                         IRC_WriteStrServersPrefix(Client, Origin,
 678                                 "MODE %s %s%s", Channel_Name(Channel),
 679                                 the_modes, the_args);
 680                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 681                                 false, "MODE %s %s%s", Channel_Name(Channel),
 682                                 the_modes, the_args);
 683                 } else {
 684                         if (use_servermode)
 685                                 Origin = Client_ThisServer();
 686                         /* Send reply to client and inform other servers and channel users */
 687                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 688                                         "MODE %s %s%s", Channel_Name(Channel),
 689                                         the_modes, the_args);
 690                         /* Only forward requests for non-local channels */
 691                         if (!Channel_IsLocal(Channel))
 692                                 IRC_WriteStrServersPrefix(Client, Origin,
 693                                         "MODE %s %s%s", Channel_Name(Channel),
 694                                         the_modes, the_args);
 695                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 696                                 false, "MODE %s %s%s", Channel_Name(Channel),
 697                                 the_modes, the_args);
 698                 }
 699         }
 700
 701         IRC_SetPenalty(Client, 1);
 702         return connected;
 703 } /* Channel_Mode */
 704
 705
 706 GLOBAL bool
 707 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 708 {
 709         assert( Client != NULL );
 710         assert( Req != NULL );
 711
 712         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 713
 714         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 715         {
 716                 Client_SetAway( Client, Req->argv[0] );
 717                 Client_ModeAdd( Client, 'a' );
 718                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 719                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 720         }
 721         else
 722         {
 723                 Client_ModeDel( Client, 'a' );
 724                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 725                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 726         }
 727 } /* IRC_AWAY */
 728
 729
 730 static bool
 731 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 732 {
 733         const char *mask;
 734         bool already;
 735         bool ret;
 736
 737         assert( Client != NULL );
 738         assert( Channel != NULL );
 739         assert( Pattern != NULL );
 740         assert(what == 'I' || what == 'b');
 741
 742         mask = Lists_MakeMask(Pattern);
 743
 744         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 745         if (!already) {
 746                 if (what == 'I')
 747                         ret = Channel_AddInvite(Channel, mask, false);
 748                 else
 749                         ret = Channel_AddBan(Channel, mask);
 750                 if (!ret)
 751                         return CONNECTED;
 752         }
 753         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 754                 return CONNECTED;
 755
 756         if (what == 'I')
 757                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 758         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 759 }
 760
 761
 762 static bool
 763 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 764 {
 765         const char *mask;
 766         struct list_head *list;
 767
 768         assert( Client != NULL );
 769         assert( Channel != NULL );
 770         assert( Pattern != NULL );
 771         assert(what == 'I' || what == 'b');
 772
 773         mask = Lists_MakeMask( Pattern );
 774
 775         if (what == 'I')
 776                 list = Channel_GetListInvites(Channel);
 777         else
 778                 list = Channel_GetListBans(Channel);
 779
 780         Lists_Del(list, mask);
 781         if (what == 'I')
 782                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 783         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 784 }
 785
 786
 787 static bool
 788 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 789                 CHANNEL *Channel, const char *Mask)
 790 {
 791         bool ok;
 792
 793         if( Client_Type( Client ) == CLIENT_USER )
 794         {
 795                 /* send confirmation to client */
 796                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 797         }
 798         else ok = true;
 799
 800         /* to other servers */
 801         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 802
 803         /* and local users in channel */
 804         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 805
 806         return ok;
 807 } /* Send_ListChange */
 808
 809
 810 /* -eof- */