src/ngircd/irc-mode.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  *
  11  * IRC commands for mode changes (MODE, AWAY, ...)
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "defines.h"
  24 #include "conn.h"
  25 #include "client.h"
  26 #include "channel.h"
  27 #include "irc-write.h"
  28 #include "lists.h"
  29 #include "log.h"
  30 #include "parse.h"
  31 #include "messages.h"
  32 #include "resolve.h"
  33 #include "conf.h"
  34
  35 #include "exp.h"
  36 #include "irc-mode.h"
  37
  38
  39 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target ));
  40 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel ));
  41
  42 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern));
  43 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern));
  44
  45 static bool Send_ListChange PARAMS(( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Mask ));
  46
  47
  48 GLOBAL bool
  49 IRC_MODE( CLIENT *Client, REQUEST *Req )
  50 {
  51         CLIENT *cl, *origin;
  52         CHANNEL *chan;
  53
  54         assert( Client != NULL );
  55         assert( Req != NULL );
  56
  57         /* No parameters? */
  58         if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  59
  60         /* Origin for answers */
  61         if( Client_Type( Client ) == CLIENT_SERVER )
  62         {
  63                 origin = Client_Search( Req->prefix );
  64                 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  65         }
  66         else origin = Client;
  67
  68         /* Channel or user mode? */
  69         cl = NULL; chan = NULL;
  70         if (Client_IsValidNick(Req->argv[0]))
  71                 cl = Client_Search(Req->argv[0]);
  72         if (Channel_IsValidName(Req->argv[0]))
  73                 chan = Channel_Search(Req->argv[0]);
  74
  75         if (cl)
  76                 return Client_Mode(Client, Req, origin, cl);
  77         if (chan)
  78                 return Channel_Mode(Client, Req, origin, chan);
  79
  80         /* No target found! */
  81         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  82                         Client_ID(Client), Req->argv[0]);
  83 } /* IRC_MODE */
  84
  85
  86 static bool
  87 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
  88 {
  89         /* Handle client mode requests */
  90
  91         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
  92         bool ok, set;
  93         int mode_arg;
  94         size_t len;
  95
  96         /* Is the client allowed to request or change the modes? */
  97         if( Client_Type( Client ) == CLIENT_USER )
  98         {
  99                 /* Users are only allowed to manipulate their own modes! */
 100                 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
 101         }
 102
 103         /* Mode request: let's answer it :-) */
 104         if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
 105
 106         mode_arg = 1;
 107         mode_ptr = Req->argv[mode_arg];
 108
 109         /* Initial state: set or unset modes? */
 110         if( *mode_ptr == '+' ) set = true;
 111         else if( *mode_ptr == '-' ) set = false;
 112         else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
 113
 114         /* Prepare reply string */
 115         if( set ) strcpy( the_modes, "+" );
 116         else strcpy( the_modes, "-" );
 117
 118         x[1] = '\0';
 119         ok = CONNECTED;
 120         while( mode_ptr )
 121         {
 122                 mode_ptr++;
 123                 if( ! *mode_ptr )
 124                 {
 125                         /* Try next argument if there's any */
 126                         mode_arg++;
 127                         if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
 128                         else break;
 129                 }
 130
 131                 switch( *mode_ptr )
 132                 {
 133                         case '+':
 134                         case '-':
 135                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 136                                 {
 137                                         /* Action modifier ("+"/"-") must be changed ... */
 138                                         len = strlen( the_modes ) - 1;
 139                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 140                                         {
 141                                                 /* Adjust last action modifier in result */
 142                                                 the_modes[len] = *mode_ptr;
 143                                         }
 144                                         else
 145                                         {
 146                                                 /* Append modifier character to result string */
 147                                                 x[0] = *mode_ptr;
 148                                                 strlcat( the_modes, x, sizeof( the_modes ));
 149                                         }
 150                                         if( *mode_ptr == '+' ) set = true;
 151                                         else set = false;
 152                                 }
 153                                 continue;
 154                 }
 155
 156                 /* Validate modes */
 157                 x[0] = '\0';
 158                 switch( *mode_ptr )
 159                 {
 160                         case 'i': /* Invisible */
 161                         case 's': /* Server messages */
 162                         case 'w': /* Wallops messages */
 163                                 x[0] = *mode_ptr;
 164                                 break;
 165
 166                         case 'a': /* Away */
 167                                 if( Client_Type( Client ) == CLIENT_SERVER )
 168                                 {
 169                                         x[0] = 'a';
 170                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 171                                 }
 172                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 173                                 break;
 174
 175                         case 'o': /* IRC operator (only unsettable!) */
 176                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 177                                 {
 178                                         Client_SetOperByMe( Target, false );
 179                                         x[0] = 'o';
 180                                 }
 181                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 182                                 break;
 183
 184                         case 'r': /* Restricted (only settable) */
 185                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 186                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 187                                 break;
 188
 189                         default:
 190                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 191                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 192                                 x[0] = '\0';
 193                                 goto client_exit;
 194                 }
 195                 if( ! ok ) break;
 196
 197                 /* Is there a valid mode change? */
 198                 if( ! x[0] ) continue;
 199
 200                 if( set )
 201                 {
 202                         /* Set mode */
 203                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 204
 205                 }
 206                 else
 207                 {
 208                         /* Unset mode */
 209                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 210                 }
 211         }
 212 client_exit:
 213
 214         /* Are there changed modes? */
 215         if( the_modes[1] )
 216         {
 217                 /* Remoce needless action modifier characters */
 218                 len = strlen( the_modes ) - 1;
 219                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 220
 221                 if( Client_Type( Client ) == CLIENT_SERVER )
 222                 {
 223                         /* Forward modes to other servers */
 224                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 225                 }
 226                 else
 227                 {
 228                         /* Send reply to client and inform other servers */
 229                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 230                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 231                 }
 232                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 233                          Client_TypeText(Target), Client_Mask(Target),
 234                          Client_Modes(Target));
 235         }
 236
 237         IRC_SetPenalty( Client, 1 );
 238         return ok;
 239 } /* Client_Mode */
 240
 241
 242 static bool
 243 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 244 {
 245         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 246         const char *mode_ptr;
 247
 248         /* Member or not? -- That's the question! */
 249         if (!Channel_IsMemberOf(Channel, Origin))
 250                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 251                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 252
 253         /* The sender is a member: generate extended reply */
 254         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 255         mode_ptr = the_modes;
 256         the_args[0] = '\0';
 257
 258         while(*mode_ptr) {
 259                 switch(*mode_ptr) {
 260                 case 'l':
 261                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 262                         strlcat(the_args, argadd, sizeof(the_args));
 263                         break;
 264                 case 'k':
 265                         strlcat(the_args, " ", sizeof(the_args));
 266                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 267                         break;
 268                 }
 269                 mode_ptr++;
 270         }
 271         if (the_args[0])
 272                 strlcat(the_modes, the_args, sizeof(the_modes));
 273
 274         return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 275                 Client_ID(Origin), Channel_Name(Channel), the_modes);
 276 }
 277
 278
 279 /**
 280  * Handle channel mode and channel-user mode changes
 281  */
 282 static bool
 283 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 284 {
 285         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 286             argadd[CLIENT_PASS_LEN], *mode_ptr;
 287         bool ok, set, modeok = true, skiponce, use_servermode = false, retval;
 288         int mode_arg, arg_arg;
 289         CLIENT *client;
 290         long l;
 291         size_t len;
 292
 293         if (Channel_IsModeless(Channel))
 294                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 295                                 Client_ID(Client), Channel_Name(Channel));
 296
 297         /* Mode request: let's answer it :-) */
 298         if (Req->argc <= 1)
 299                 return Channel_Mode_Answer_Request(Origin, Channel);
 300
 301         /* Is the user allowed to change modes? */
 302         if (Client_Type(Client) == CLIENT_USER) {
 303                 /* Is the originating user on that channel? */
 304                 if (!Channel_IsMemberOf(Channel, Origin))
 305                         return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 306                                 Client_ID(Origin), Channel_Name(Channel));
 307                 modeok = false;
 308                 /* channel operator? */
 309                 if (strchr(Channel_UserModes(Channel, Origin), 'o'))
 310                         modeok = true;
 311                 else if (Conf_OperCanMode) {
 312                         /* IRC-Operators can use MODE as well */
 313                         if (Client_OperByMe(Origin)) {
 314                                 modeok = true;
 315                                 if (Conf_OperServerMode)
 316                                         use_servermode = true; /* Change Origin to Server */
 317                         }
 318                 }
 319         }
 320
 321         mode_arg = 1;
 322         mode_ptr = Req->argv[mode_arg];
 323         if (Req->argc > mode_arg + 1)
 324                 arg_arg = mode_arg + 1;
 325         else
 326                 arg_arg = -1;
 327
 328         /* Initial state: set or unset modes? */
 329         skiponce = false;
 330         switch (*mode_ptr) {
 331         case '-':
 332                 set = false;
 333                 break;
 334         case '+':
 335                 set = true;
 336                 break;
 337         default:
 338                 set = true;
 339                 skiponce = true;
 340         }
 341
 342         /* Prepare reply string */
 343         strcpy(the_modes, set ? "+" : "-");
 344         the_args[0] = '\0';
 345
 346         x[1] = '\0';
 347         ok = CONNECTED;
 348         while (mode_ptr) {
 349                 if (!skiponce)
 350                         mode_ptr++;
 351                 if (!*mode_ptr) {
 352                         /* Try next argument if there's any */
 353                         if (arg_arg > mode_arg)
 354                                 mode_arg = arg_arg;
 355                         else
 356                                 mode_arg++;
 357
 358                         if (mode_arg >= Req->argc)
 359                                 break;
 360                         mode_ptr = Req->argv[mode_arg];
 361
 362                         if (Req->argc > mode_arg + 1)
 363                                 arg_arg = mode_arg + 1;
 364                         else
 365                                 arg_arg = -1;
 366                 }
 367                 skiponce = false;
 368
 369                 switch (*mode_ptr) {
 370                 case '+':
 371                 case '-':
 372                         if (((*mode_ptr == '+') && !set)
 373                             || ((*mode_ptr == '-') && set)) {
 374                                 /* Action modifier ("+"/"-") must be changed ... */
 375                                 len = strlen(the_modes) - 1;
 376                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 377                                         /* Adjust last action modifier in result */
 378                                         the_modes[len] = *mode_ptr;
 379                                 } else {
 380                                         /* Append modifier character to result string */
 381                                         x[0] = *mode_ptr;
 382                                         strlcat(the_modes, x, sizeof(the_modes));
 383                                 }
 384                                 set = *mode_ptr == '+';
 385                         }
 386                         continue;
 387                 }
 388
 389                 /* Are there arguments left? */
 390                 if (arg_arg >= Req->argc)
 391                         arg_arg = -1;
 392
 393                 /* Validate modes */
 394                 x[0] = '\0';
 395                 argadd[0] = '\0';
 396                 client = NULL;
 397                 switch (*mode_ptr) {
 398                 /* --- Channel modes --- */
 399                 case 'i': /* Invite only */
 400                 case 'm': /* Moderated */
 401                 case 'n': /* Only members can write */
 402                 case 's': /* Secret channel */
 403                 case 't': /* Topic locked */
 404                         if (modeok)
 405                                 x[0] = *mode_ptr;
 406                         else
 407                                 ok = IRC_WriteStrClient(Origin,
 408                                         ERR_CHANOPRIVSNEEDED_MSG,
 409                                         Client_ID(Origin), Channel_Name(Channel));
 410                         break;
 411                 case 'k': /* Channel key */
 412                         if (!set) {
 413                                 if (modeok)
 414                                         x[0] = *mode_ptr;
 415                                 else
 416                                         ok = IRC_WriteStrClient(Origin,
 417                                                 ERR_CHANOPRIVSNEEDED_MSG,
 418                                                 Client_ID(Origin),
 419                                                 Channel_Name(Channel));
 420                                 break;
 421                         }
 422                         if (arg_arg > mode_arg) {
 423                                 if (modeok) {
 424                                         Channel_ModeDel(Channel, 'k');
 425                                         Channel_SetKey(Channel,
 426                                                        Req->argv[arg_arg]);
 427                                         strlcpy(argadd, Channel_Key(Channel),
 428                                                 sizeof(argadd));
 429                                         x[0] = *mode_ptr;
 430                                 } else {
 431                                         ok = IRC_WriteStrClient(Origin,
 432                                                 ERR_CHANOPRIVSNEEDED_MSG,
 433                                                 Client_ID(Origin),
 434                                                 Channel_Name(Channel));
 435                                 }
 436                                 Req->argv[arg_arg][0] = '\0';
 437                                 arg_arg++;
 438                         } else {
 439                                 ok = IRC_WriteStrClient(Origin,
 440                                         ERR_NEEDMOREPARAMS_MSG,
 441                                         Client_ID(Origin), Req->command);
 442                                 goto chan_exit;
 443                         }
 444                         break;
 445                 case 'l': /* Member limit */
 446                         if (!set) {
 447                                 if (modeok)
 448                                         x[0] = *mode_ptr;
 449                                 else
 450                                         ok = IRC_WriteStrClient(Origin,
 451                                                 ERR_CHANOPRIVSNEEDED_MSG,
 452                                                 Client_ID(Origin),
 453                                                 Channel_Name(Channel));
 454                                 break;
 455                         }
 456                         if (arg_arg > mode_arg) {
 457                                 if (modeok) {
 458                                         l = atol(Req->argv[arg_arg]);
 459                                         if (l > 0 && l < 0xFFFF) {
 460                                                 Channel_ModeDel(Channel, 'l');
 461                                                 Channel_SetMaxUsers(Channel, l);
 462                                                 snprintf(argadd, sizeof(argadd),
 463                                                          "%ld", l);
 464                                                 x[0] = *mode_ptr;
 465                                         }
 466                                 } else {
 467                                         ok = IRC_WriteStrClient(Origin,
 468                                                 ERR_CHANOPRIVSNEEDED_MSG,
 469                                                 Client_ID(Origin),
 470                                                 Channel_Name(Channel));
 471                                 }
 472                                 Req->argv[arg_arg][0] = '\0';
 473                                 arg_arg++;
 474                         } else {
 475                                 ok = IRC_WriteStrClient(Origin,
 476                                         ERR_NEEDMOREPARAMS_MSG,
 477                                         Client_ID(Origin), Req->command);
 478                                 goto chan_exit;
 479                         }
 480                         break;
 481                 case 'P': /* Persistent channel */
 482                         if (modeok) {
 483                                 /* Only IRC operators are allowed to
 484                                  * set the 'P' channel mode! */
 485                                 if (set && !(Client_OperByMe(Client)
 486                                     || Client_Type(Client) == CLIENT_SERVER))
 487                                         ok = IRC_WriteStrClient(Origin,
 488                                                 ERR_NOPRIVILEGES_MSG,
 489                                                 Client_ID(Origin));
 490                                 else
 491                                         x[0] = 'P';
 492                         } else
 493                                 ok = IRC_WriteStrClient(Origin,
 494                                         ERR_CHANOPRIVSNEEDED_MSG,
 495                                         Client_ID(Origin),
 496                                         Channel_Name(Channel));
 497                         break;
 498                 /* --- Channel user modes --- */
 499                 case 'o': /* Channel operator */
 500                 case 'v': /* Voice */
 501                         if (arg_arg > mode_arg) {
 502                                 if (modeok) {
 503                                         client = Client_Search(Req->argv[arg_arg]);
 504                                         if (client)
 505                                                 x[0] = *mode_ptr;
 506                                         else
 507                                                 ok = IRC_WriteStrClient(Client,
 508                                                         ERR_NOSUCHNICK_MSG,
 509                                                         Client_ID(Client),
 510                                                         Req->argv[arg_arg]);
 511                                 } else {
 512                                         ok = IRC_WriteStrClient(Origin,
 513                                                 ERR_CHANOPRIVSNEEDED_MSG,
 514                                                 Client_ID(Origin),
 515                                                 Channel_Name(Channel));
 516                                 }
 517                                 Req->argv[arg_arg][0] = '\0';
 518                                 arg_arg++;
 519                         } else {
 520                                 ok = IRC_WriteStrClient(Origin,
 521                                         ERR_NEEDMOREPARAMS_MSG,
 522                                         Client_ID(Origin), Req->command);
 523                                 goto chan_exit;
 524                         }
 525                         break;
 526                 /* --- Channel lists --- */
 527                 case 'I': /* Invite lists */
 528                 case 'b': /* Ban lists */
 529                         if (arg_arg > mode_arg) {
 530                                 /* modify list */
 531                                 if (modeok) {
 532                                         ok = set
 533                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 534                                                 Client, Channel,
 535                                                 Req->argv[arg_arg])
 536                                            : Del_Ban_Invite(*mode_ptr, Origin,
 537                                                 Client, Channel,
 538                                                 Req->argv[arg_arg]);
 539                                 } else {
 540                                         ok = IRC_WriteStrClient(Origin,
 541                                                 ERR_CHANOPRIVSNEEDED_MSG,
 542                                                 Client_ID(Origin),
 543                                                 Channel_Name(Channel));
 544                                 }
 545                                 Req->argv[arg_arg][0] = '\0';
 546                                 arg_arg++;
 547                         } else {
 548                                 if (*mode_ptr == 'I')
 549                                         Channel_ShowInvites(Origin, Channel);
 550                                 else
 551                                         Channel_ShowBans(Origin, Channel);
 552                         }
 553                         break;
 554                 default:
 555                         Log(LOG_DEBUG,
 556                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 557                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 558                             Channel_Name(Channel));
 559                         if (Client_Type(Client) != CLIENT_SERVER)
 560                                 ok = IRC_WriteStrClient(Origin,
 561                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 562                                         Client_ID(Origin),
 563                                         set ? '+' : '-', *mode_ptr);
 564                         x[0] = '\0';
 565                         goto chan_exit;
 566                 }       /* switch() */
 567
 568                 if (!ok)
 569                         break;
 570
 571                 /* Is there a valid mode change? */
 572                 if (!x[0])
 573                         continue;
 574
 575                 /* Validate target client */
 576                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 577                         if (!IRC_WriteStrClient
 578                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 579                              Client_ID(Origin), Client_ID(client),
 580                              Channel_Name(Channel)))
 581                                 break;
 582
 583                         continue;
 584                 }
 585
 586                 if (client) {
 587                         /* Channel-User-Mode */
 588                         retval = set
 589                                ? Channel_UserModeAdd(Channel, client, x[0])
 590                                : Channel_UserModeDel(Channel, client, x[0]);
 591                         if (retval) {
 592                                 strlcat(the_args, " ", sizeof(the_args));
 593                                 strlcat(the_args, Client_ID(client),
 594                                         sizeof(the_args));
 595                                 strlcat(the_modes, x, sizeof(the_modes));
 596                                 LogDebug
 597                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 598                                      Client_Mask(client), Channel_Name(Channel),
 599                                      Channel_UserModes(Channel, client));
 600                         }
 601                 } else {
 602                         /* Channel-Mode */
 603                         retval = set
 604                                ? Channel_ModeAdd(Channel, x[0])
 605                                : Channel_ModeDel(Channel, x[0]);
 606                         if (retval) {
 607                                 strlcat(the_modes, x, sizeof(the_modes));
 608                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 609                                          Channel_Name(Channel),
 610                                          Channel_Modes(Channel));
 611                         }
 612                 }
 613
 614                 /* Are there additional arguments to add? */
 615                 if (argadd[0]) {
 616                         strlcat(the_args, " ", sizeof(the_args));
 617                         strlcat(the_args, argadd, sizeof(the_args));
 618                 }
 619         }
 620
 621       chan_exit:
 622         /* Are there changed modes? */
 623         if (the_modes[1]) {
 624                 /* Clean up mode string */
 625                 len = strlen(the_modes) - 1;
 626                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 627                         the_modes[len] = '\0';
 628
 629                 if (Client_Type(Client) == CLIENT_SERVER) {
 630                         /* MODE requests for local channels from other servers
 631                          * are definitely invalid! */
 632                         if (Channel_IsLocal(Channel)) {
 633                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 634                                 return CONNECTED;
 635                         }
 636
 637                         /* Forward mode changes to channel users and all the
 638                          * other remote servers: */
 639                         IRC_WriteStrServersPrefix(Client, Origin,
 640                                 "MODE %s %s%s", Channel_Name(Channel),
 641                                 the_modes, the_args);
 642                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 643                                 false, "MODE %s %s%s", Channel_Name(Channel),
 644                                 the_modes, the_args);
 645                 } else {
 646                         if (use_servermode)
 647                                 Origin = Client_ThisServer();
 648                         /* Send reply to client and inform other servers and channel users */
 649                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 650                                         "MODE %s %s%s", Channel_Name(Channel),
 651                                         the_modes, the_args);
 652                         /* Only forward requests for non-local channels */
 653                         if (!Channel_IsLocal(Channel))
 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                 }
 661         }
 662
 663         IRC_SetPenalty(Client, 1);
 664         return CONNECTED;
 665 } /* Channel_Mode */
 666
 667
 668 GLOBAL bool
 669 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 670 {
 671         assert( Client != NULL );
 672         assert( Req != NULL );
 673
 674         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 675
 676         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 677         {
 678                 Client_SetAway( Client, Req->argv[0] );
 679                 Client_ModeAdd( Client, 'a' );
 680                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 681                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 682         }
 683         else
 684         {
 685                 Client_ModeDel( Client, 'a' );
 686                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 687                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 688         }
 689 } /* IRC_AWAY */
 690
 691
 692 static bool
 693 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 694 {
 695         const char *mask;
 696         bool already;
 697         bool ret;
 698
 699         assert( Client != NULL );
 700         assert( Channel != NULL );
 701         assert( Pattern != NULL );
 702         assert(what == 'I' || what == 'b');
 703
 704         mask = Lists_MakeMask(Pattern);
 705
 706         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 707         if (!already) {
 708                 if (what == 'I')
 709                         ret = Channel_AddInvite(Channel, mask, false);
 710                 else
 711                         ret = Channel_AddBan(Channel, mask);
 712                 if (!ret)
 713                         return CONNECTED;
 714         }
 715         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 716                 return CONNECTED;
 717
 718         if (what == 'I')
 719                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 720         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 721 }
 722
 723
 724 static bool
 725 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 726 {
 727         const char *mask;
 728         struct list_head *list;
 729
 730         assert( Client != NULL );
 731         assert( Channel != NULL );
 732         assert( Pattern != NULL );
 733         assert(what == 'I' || what == 'b');
 734
 735         mask = Lists_MakeMask( Pattern );
 736
 737         if (what == 'I')
 738                 list = Channel_GetListInvites(Channel);
 739         else
 740                 list = Channel_GetListBans(Channel);
 741
 742         Lists_Del(list, mask);
 743         if (what == 'I')
 744                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 745         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 746 }
 747
 748
 749 static bool
 750 Send_ListChange( char *Mode, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Mask )
 751 {
 752         bool ok;
 753
 754         if( Client_Type( Client ) == CLIENT_USER )
 755         {
 756                 /* send confirmation to client */
 757                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 758         }
 759         else ok = true;
 760
 761         /* to other servers */
 762         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 763
 764         /* and local users in channel */
 765         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 766
 767         return ok;
 768 } /* Send_ListChange */
 769
 770
 771 /* -eof- */