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
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * IRC commands for mode changes (like MODE, AWAY, etc.)
  17  */
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "defines.h"
  26 #include "conn.h"
  27 #include "channel.h"
  28 #include "irc-write.h"
  29 #include "lists.h"
  30 #include "log.h"
  31 #include "parse.h"
  32 #include "messages.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,
  40         CLIENT *Target ));
  41 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  42         CHANNEL *Channel ));
  43
  44 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  45         CHANNEL *Channel, const char *Pattern));
  46 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  47         CHANNEL *Channel, const char *Pattern));
  48
  49 static bool Send_ListChange PARAMS((const char *Mode, CLIENT *Prefix,
  50         CLIENT *Client, CHANNEL *Channel, const char *Mask));
  51
  52
  53 /**
  54  * Handler for the IRC "MODE" command.
  55  *
  56  * See RFC 2812 section 3.1.5 ("user mode message") and section 3.2.3
  57  * ("channel mode message"), and RFC 2811 section 4 ("channel modes").
  58  *
  59  * @param Client        The client from which this command has been received.
  60  * @param Req           Request structure with prefix and all parameters.
  61  * @returns             CONNECTED or DISCONNECTED.
  62  */
  63 GLOBAL bool
  64 IRC_MODE( CLIENT *Client, REQUEST *Req )
  65 {
  66         CLIENT *cl, *origin;
  67         CHANNEL *chan;
  68
  69         assert(Client != NULL);
  70         assert(Req != NULL);
  71
  72         /* No parameters? */
  73         if (Req->argc < 1)
  74                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  75                                           Client_ID(Client), Req->command);
  76
  77         /* Origin for answers */
  78         if (Client_Type(Client) == CLIENT_SERVER) {
  79                 origin = Client_Search(Req->prefix);
  80                 if (!origin)
  81                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  82                                                   Client_ID(Client),
  83                                                   Req->prefix);
  84         } else
  85                 origin = Client;
  86
  87         /* Channel or user mode? */
  88         cl = NULL; chan = NULL;
  89         if (Client_IsValidNick(Req->argv[0]))
  90                 cl = Client_Search(Req->argv[0]);
  91         if (Channel_IsValidName(Req->argv[0]))
  92                 chan = Channel_Search(Req->argv[0]);
  93
  94         if (cl)
  95                 return Client_Mode(Client, Req, origin, cl);
  96         if (chan)
  97                 return Channel_Mode(Client, Req, origin, chan);
  98
  99         /* No target found! */
 100         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 101                         Client_ID(Client), Req->argv[0]);
 102 } /* IRC_MODE */
 103
 104
 105 /**
 106  * Handle client mode requests
 107  *
 108  * @param Client        The client from which this command has been received.
 109  * @param Req           Request structure with prefix and all parameters.
 110  * @param Origin        The originator of the MODE command (prefix).
 111  * @param Target        The target (client) of this MODE command.
 112  * @returns             CONNECTED or DISCONNECTED.
 113  */
 114 static bool
 115 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
 116 {
 117         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
 118         bool ok, set;
 119         int mode_arg;
 120         size_t len;
 121
 122         /* Is the client allowed to request or change the modes? */
 123         if (Client_Type(Client) == CLIENT_USER) {
 124                 /* Users are only allowed to manipulate their own modes! */
 125                 if (Target != Client)
 126                         return IRC_WriteStrClient(Client,
 127                                                   ERR_USERSDONTMATCH_MSG,
 128                                                   Client_ID(Client));
 129         }
 130
 131         /* Mode request: let's answer it :-) */
 132         if (Req->argc == 1)
 133                 return IRC_WriteStrClient(Origin, RPL_UMODEIS_MSG,
 134                                           Client_ID(Origin),
 135                                           Client_Modes(Target));
 136
 137         mode_arg = 1;
 138         mode_ptr = Req->argv[mode_arg];
 139
 140         /* Initial state: set or unset modes? */
 141         if (*mode_ptr == '+') {
 142                 set = true;
 143                 strcpy(the_modes, "+");
 144         } else if (*mode_ptr == '-') {
 145                 set = false;
 146                 strcpy(the_modes, "-");
 147         } else
 148                 return IRC_WriteStrClient(Origin, ERR_UMODEUNKNOWNFLAG_MSG,
 149                                           Client_ID(Origin));
 150
 151         x[1] = '\0';
 152         ok = CONNECTED;
 153         while (mode_ptr) {
 154                 mode_ptr++;
 155                 if (!*mode_ptr) {
 156                         /* Try next argument if there's any */
 157                         mode_arg++;
 158                         if (mode_arg < Req->argc)
 159                                 mode_ptr = Req->argv[mode_arg];
 160                         else
 161                                 break;
 162                 }
 163
 164                 switch( *mode_ptr )
 165                 {
 166                         case '+':
 167                         case '-':
 168                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 169                                 {
 170                                         /* Action modifier ("+"/"-") must be changed ... */
 171                                         len = strlen( the_modes ) - 1;
 172                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 173                                         {
 174                                                 /* Adjust last action modifier in result */
 175                                                 the_modes[len] = *mode_ptr;
 176                                         }
 177                                         else
 178                                         {
 179                                                 /* Append modifier character to result string */
 180                                                 x[0] = *mode_ptr;
 181                                                 strlcat( the_modes, x, sizeof( the_modes ));
 182                                         }
 183                                         if( *mode_ptr == '+' ) set = true;
 184                                         else set = false;
 185                                 }
 186                                 continue;
 187                 }
 188
 189                 /* Validate modes */
 190                 x[0] = '\0';
 191                 switch( *mode_ptr )
 192                 {
 193                         case 'i': /* Invisible */
 194                         case 's': /* Server messages */
 195                         case 'w': /* Wallops messages */
 196                                 x[0] = *mode_ptr;
 197                                 break;
 198
 199                         case 'a': /* Away */
 200                                 if( Client_Type( Client ) == CLIENT_SERVER )
 201                                 {
 202                                         x[0] = 'a';
 203                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 204                                 }
 205                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 206                                 break;
 207
 208                         case 'c': /* Receive connect notices
 209                                    * (only settable by IRC operators!) */
 210                                 if(!set || Client_OperByMe(Origin)
 211                                    || Client_Type(Client) == CLIENT_SERVER)
 212                                         x[0] = 'c';
 213                                 else
 214                                         ok = IRC_WriteStrClient(Origin,
 215                                                         ERR_NOPRIVILEGES_MSG,
 216                                                         Client_ID(Origin));
 217                                 break;
 218
 219                         case 'o': /* IRC operator (only unsettable!) */
 220                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 221                                 {
 222                                         Client_SetOperByMe( Target, false );
 223                                         x[0] = 'o';
 224                                 }
 225                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 226                                 break;
 227
 228                         case 'r': /* Restricted (only settable) */
 229                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 230                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 231                                 break;
 232
 233                         case 'x': /* Cloak hostname */
 234                                 if (Client_HasMode(Client, 'r'))
 235                                         ok = IRC_WriteStrClient(Origin,
 236                                                            ERR_RESTRICTED_MSG,
 237                                                            Client_ID(Origin));
 238                                 else
 239                                         x[0] = 'x';
 240                                 break;
 241
 242                         default:
 243                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 244                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 245                                 x[0] = '\0';
 246                                 goto client_exit;
 247                 }
 248                 if (!ok)
 249                         break;
 250
 251                 /* Is there a valid mode change? */
 252                 if (!x[0])
 253                         continue;
 254
 255                 if (set) {
 256                         if (Client_ModeAdd(Target, x[0]))
 257                                 strlcat(the_modes, x, sizeof(the_modes));
 258                 } else {
 259                         if (Client_ModeDel(Target, x[0]))
 260                                 strlcat(the_modes, x, sizeof(the_modes));
 261                 }
 262         }
 263 client_exit:
 264
 265         /* Are there changed modes? */
 266         if (the_modes[1]) {
 267                 /* Remoce needless action modifier characters */
 268                 len = strlen(the_modes) - 1;
 269                 if (the_modes[len] == '+' || the_modes[len] == '-')
 270                         the_modes[len] = '\0';
 271
 272                 if (Client_Type(Client) == CLIENT_SERVER) {
 273                         /* Forward modes to other servers */
 274                         IRC_WriteStrServersPrefix(Client, Origin,
 275                                                   "MODE %s :%s",
 276                                                   Client_ID(Target),
 277                                                   the_modes);
 278                 } else {
 279                         /* Send reply to client and inform other servers */
 280                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 281                                                       "MODE %s :%s",
 282                                                       Client_ID(Target),
 283                                                       the_modes);
 284                         IRC_WriteStrServersPrefix(Client, Origin,
 285                                                   "MODE %s :%s",
 286                                                   Client_ID(Target),
 287                                                   the_modes);
 288                 }
 289                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 290                          Client_TypeText(Target), Client_Mask(Target),
 291                          Client_Modes(Target));
 292         }
 293
 294         IRC_SetPenalty(Client, 1);
 295         return ok;
 296 } /* Client_Mode */
 297
 298
 299 static bool
 300 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 301 {
 302         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 303         const char *mode_ptr;
 304
 305         /* Member or not? -- That's the question! */
 306         if (!Channel_IsMemberOf(Channel, Origin))
 307                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 308                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 309
 310         /* The sender is a member: generate extended reply */
 311         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 312         mode_ptr = the_modes;
 313         the_args[0] = '\0';
 314
 315         while(*mode_ptr) {
 316                 switch(*mode_ptr) {
 317                 case 'l':
 318                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 319                         strlcat(the_args, argadd, sizeof(the_args));
 320                         break;
 321                 case 'k':
 322                         strlcat(the_args, " ", sizeof(the_args));
 323                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 324                         break;
 325                 }
 326                 mode_ptr++;
 327         }
 328         if (the_args[0])
 329                 strlcat(the_modes, the_args, sizeof(the_modes));
 330
 331         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 332                                 Client_ID(Origin), Channel_Name(Channel),
 333                                 the_modes))
 334                 return DISCONNECTED;
 335 #ifndef STRICT_RFC
 336         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 337                                   Client_ID(Origin), Channel_Name(Channel),
 338                                   Channel_CreationTime(Channel)))
 339                 return DISCONNECTED;
 340 #endif
 341         return CONNECTED;
 342 }
 343
 344
 345 /**
 346  * Handle channel mode and channel-user mode changes
 347  */
 348 static bool
 349 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 350 {
 351         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 352             argadd[CLIENT_PASS_LEN], *mode_ptr;
 353         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 354         int mode_arg, arg_arg;
 355         CLIENT *client;
 356         long l;
 357         size_t len;
 358
 359         if (Channel_IsModeless(Channel))
 360                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 361                                 Client_ID(Client), Channel_Name(Channel));
 362
 363         /* Mode request: let's answer it :-) */
 364         if (Req->argc <= 1)
 365                 return Channel_Mode_Answer_Request(Origin, Channel);
 366
 367         Channel_CheckAdminRights(Channel, Client, Origin,
 368                                  &onchannel, &modeok, &use_servermode);
 369
 370         if (!onchannel && !modeok)
 371                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 372                                           Client_ID(Origin),
 373                                           Channel_Name(Channel));
 374
 375         mode_arg = 1;
 376         mode_ptr = Req->argv[mode_arg];
 377         if (Req->argc > mode_arg + 1)
 378                 arg_arg = mode_arg + 1;
 379         else
 380                 arg_arg = -1;
 381
 382         /* Initial state: set or unset modes? */
 383         skiponce = false;
 384         switch (*mode_ptr) {
 385         case '-':
 386                 set = false;
 387                 break;
 388         case '+':
 389                 set = true;
 390                 break;
 391         default:
 392                 set = true;
 393                 skiponce = true;
 394         }
 395
 396         /* Prepare reply string */
 397         strcpy(the_modes, set ? "+" : "-");
 398         the_args[0] = '\0';
 399
 400         x[1] = '\0';
 401         connected = CONNECTED;
 402         while (mode_ptr) {
 403                 if (!skiponce)
 404                         mode_ptr++;
 405                 if (!*mode_ptr) {
 406                         /* Try next argument if there's any */
 407                         if (arg_arg > mode_arg)
 408                                 mode_arg = arg_arg;
 409                         else
 410                                 mode_arg++;
 411
 412                         if (mode_arg >= Req->argc)
 413                                 break;
 414                         mode_ptr = Req->argv[mode_arg];
 415
 416                         if (Req->argc > mode_arg + 1)
 417                                 arg_arg = mode_arg + 1;
 418                         else
 419                                 arg_arg = -1;
 420                 }
 421                 skiponce = false;
 422
 423                 switch (*mode_ptr) {
 424                 case '+':
 425                 case '-':
 426                         if (((*mode_ptr == '+') && !set)
 427                             || ((*mode_ptr == '-') && set)) {
 428                                 /* Action modifier ("+"/"-") must be changed ... */
 429                                 len = strlen(the_modes) - 1;
 430                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 431                                         /* Adjust last action modifier in result */
 432                                         the_modes[len] = *mode_ptr;
 433                                 } else {
 434                                         /* Append modifier character to result string */
 435                                         x[0] = *mode_ptr;
 436                                         strlcat(the_modes, x, sizeof(the_modes));
 437                                 }
 438                                 set = *mode_ptr == '+';
 439                         }
 440                         continue;
 441                 }
 442
 443                 /* Are there arguments left? */
 444                 if (arg_arg >= Req->argc)
 445                         arg_arg = -1;
 446
 447                 /* Validate modes */
 448                 x[0] = '\0';
 449                 argadd[0] = '\0';
 450                 client = NULL;
 451                 switch (*mode_ptr) {
 452                 /* --- Channel modes --- */
 453                 case 'i': /* Invite only */
 454                 case 'm': /* Moderated */
 455                 case 'n': /* Only members can write */
 456                 case 's': /* Secret channel */
 457                 case 't': /* Topic locked */
 458                 case 'z': /* Secure connections only */
 459                         if (modeok)
 460                                 x[0] = *mode_ptr;
 461                         else
 462                                 connected = IRC_WriteStrClient(Origin,
 463                                         ERR_CHANOPRIVSNEEDED_MSG,
 464                                         Client_ID(Origin), Channel_Name(Channel));
 465                         break;
 466                 case 'k': /* Channel key */
 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                                         Channel_ModeDel(Channel, 'k');
 480                                         Channel_SetKey(Channel,
 481                                                        Req->argv[arg_arg]);
 482                                         strlcpy(argadd, Channel_Key(Channel),
 483                                                 sizeof(argadd));
 484                                         x[0] = *mode_ptr;
 485                                 } else {
 486                                         connected = IRC_WriteStrClient(Origin,
 487                                                 ERR_CHANOPRIVSNEEDED_MSG,
 488                                                 Client_ID(Origin),
 489                                                 Channel_Name(Channel));
 490                                 }
 491                                 Req->argv[arg_arg][0] = '\0';
 492                                 arg_arg++;
 493                         } else {
 494                                 connected = IRC_WriteStrClient(Origin,
 495                                         ERR_NEEDMOREPARAMS_MSG,
 496                                         Client_ID(Origin), Req->command);
 497                                 goto chan_exit;
 498                         }
 499                         break;
 500                 case 'l': /* Member limit */
 501                         if (!set) {
 502                                 if (modeok)
 503                                         x[0] = *mode_ptr;
 504                                 else
 505                                         connected = IRC_WriteStrClient(Origin,
 506                                                 ERR_CHANOPRIVSNEEDED_MSG,
 507                                                 Client_ID(Origin),
 508                                                 Channel_Name(Channel));
 509                                 break;
 510                         }
 511                         if (arg_arg > mode_arg) {
 512                                 if (modeok) {
 513                                         l = atol(Req->argv[arg_arg]);
 514                                         if (l > 0 && l < 0xFFFF) {
 515                                                 Channel_ModeDel(Channel, 'l');
 516                                                 Channel_SetMaxUsers(Channel, l);
 517                                                 snprintf(argadd, sizeof(argadd),
 518                                                          "%ld", l);
 519                                                 x[0] = *mode_ptr;
 520                                         }
 521                                 } else {
 522                                         connected = IRC_WriteStrClient(Origin,
 523                                                 ERR_CHANOPRIVSNEEDED_MSG,
 524                                                 Client_ID(Origin),
 525                                                 Channel_Name(Channel));
 526                                 }
 527                                 Req->argv[arg_arg][0] = '\0';
 528                                 arg_arg++;
 529                         } else {
 530                                 connected = IRC_WriteStrClient(Origin,
 531                                         ERR_NEEDMOREPARAMS_MSG,
 532                                         Client_ID(Origin), Req->command);
 533                                 goto chan_exit;
 534                         }
 535                         break;
 536                 case 'O': /* IRC operators only */
 537                         if (modeok) {
 538                                 /* Only IRC operators are allowed to
 539                                  * set the 'O' channel mode! */
 540                                 if (set && !(Client_OperByMe(Client)
 541                                     || Client_Type(Client) == CLIENT_SERVER))
 542                                         connected = IRC_WriteStrClient(Origin,
 543                                                 ERR_NOPRIVILEGES_MSG,
 544                                                 Client_ID(Origin));
 545                                 else
 546                                         x[0] = 'O';
 547                         } else
 548                                 connected = IRC_WriteStrClient(Origin,
 549                                                 ERR_CHANOPRIVSNEEDED_MSG,
 550                                                 Client_ID(Origin),
 551                                                 Channel_Name(Channel));
 552                                 break;
 553                 case 'P': /* Persistent channel */
 554                         if (modeok) {
 555                                 /* Only IRC operators are allowed to
 556                                  * set the 'P' channel mode! */
 557                                 if (set && !(Client_OperByMe(Client)
 558                                     || Client_Type(Client) == CLIENT_SERVER))
 559                                         connected = IRC_WriteStrClient(Origin,
 560                                                 ERR_NOPRIVILEGES_MSG,
 561                                                 Client_ID(Origin));
 562                                 else
 563                                         x[0] = 'P';
 564                         } else
 565                                 connected = IRC_WriteStrClient(Origin,
 566                                         ERR_CHANOPRIVSNEEDED_MSG,
 567                                         Client_ID(Origin),
 568                                         Channel_Name(Channel));
 569                         break;
 570                 /* --- Channel user modes --- */
 571                 case 'o': /* Channel operator */
 572                 case 'v': /* Voice */
 573                         if (arg_arg > mode_arg) {
 574                                 if (modeok) {
 575                                         client = Client_Search(Req->argv[arg_arg]);
 576                                         if (client)
 577                                                 x[0] = *mode_ptr;
 578                                         else
 579                                                 connected = IRC_WriteStrClient(Client,
 580                                                         ERR_NOSUCHNICK_MSG,
 581                                                         Client_ID(Client),
 582                                                         Req->argv[arg_arg]);
 583                                 } else {
 584                                         connected = IRC_WriteStrClient(Origin,
 585                                                 ERR_CHANOPRIVSNEEDED_MSG,
 586                                                 Client_ID(Origin),
 587                                                 Channel_Name(Channel));
 588                                 }
 589                                 Req->argv[arg_arg][0] = '\0';
 590                                 arg_arg++;
 591                         } else {
 592                                 connected = IRC_WriteStrClient(Origin,
 593                                         ERR_NEEDMOREPARAMS_MSG,
 594                                         Client_ID(Origin), Req->command);
 595                                 goto chan_exit;
 596                         }
 597                         break;
 598                 /* --- Channel lists --- */
 599                 case 'I': /* Invite lists */
 600                 case 'b': /* Ban lists */
 601                         if (arg_arg > mode_arg) {
 602                                 /* modify list */
 603                                 if (modeok) {
 604                                         connected = set
 605                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 606                                                 Client, Channel,
 607                                                 Req->argv[arg_arg])
 608                                            : Del_Ban_Invite(*mode_ptr, Origin,
 609                                                 Client, Channel,
 610                                                 Req->argv[arg_arg]);
 611                                 } else {
 612                                         connected = IRC_WriteStrClient(Origin,
 613                                                 ERR_CHANOPRIVSNEEDED_MSG,
 614                                                 Client_ID(Origin),
 615                                                 Channel_Name(Channel));
 616                                 }
 617                                 Req->argv[arg_arg][0] = '\0';
 618                                 arg_arg++;
 619                         } else {
 620                                 if (*mode_ptr == 'I')
 621                                         Channel_ShowInvites(Origin, Channel);
 622                                 else
 623                                         Channel_ShowBans(Origin, Channel);
 624                         }
 625                         break;
 626                 default:
 627                         Log(LOG_DEBUG,
 628                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 629                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 630                             Channel_Name(Channel));
 631                         if (Client_Type(Client) != CLIENT_SERVER)
 632                                 connected = IRC_WriteStrClient(Origin,
 633                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 634                                         Client_ID(Origin),
 635                                         set ? '+' : '-', *mode_ptr);
 636                         x[0] = '\0';
 637                         goto chan_exit;
 638                 }       /* switch() */
 639
 640                 if (!connected)
 641                         break;
 642
 643                 /* Is there a valid mode change? */
 644                 if (!x[0])
 645                         continue;
 646
 647                 /* Validate target client */
 648                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 649                         if (!IRC_WriteStrClient
 650                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 651                              Client_ID(Origin), Client_ID(client),
 652                              Channel_Name(Channel)))
 653                                 break;
 654
 655                         continue;
 656                 }
 657
 658                 if (client) {
 659                         /* Channel-User-Mode */
 660                         retval = set
 661                                ? Channel_UserModeAdd(Channel, client, x[0])
 662                                : Channel_UserModeDel(Channel, client, x[0]);
 663                         if (retval) {
 664                                 strlcat(the_args, " ", sizeof(the_args));
 665                                 strlcat(the_args, Client_ID(client),
 666                                         sizeof(the_args));
 667                                 strlcat(the_modes, x, sizeof(the_modes));
 668                                 LogDebug
 669                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 670                                      Client_Mask(client), Channel_Name(Channel),
 671                                      Channel_UserModes(Channel, client));
 672                         }
 673                 } else {
 674                         /* Channel-Mode */
 675                         retval = set
 676                                ? Channel_ModeAdd(Channel, x[0])
 677                                : Channel_ModeDel(Channel, x[0]);
 678                         if (retval) {
 679                                 strlcat(the_modes, x, sizeof(the_modes));
 680                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 681                                          Channel_Name(Channel),
 682                                          Channel_Modes(Channel));
 683                         }
 684                 }
 685
 686                 /* Are there additional arguments to add? */
 687                 if (argadd[0]) {
 688                         strlcat(the_args, " ", sizeof(the_args));
 689                         strlcat(the_args, argadd, sizeof(the_args));
 690                 }
 691         }
 692
 693       chan_exit:
 694         /* Are there changed modes? */
 695         if (the_modes[1]) {
 696                 /* Clean up mode string */
 697                 len = strlen(the_modes) - 1;
 698                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 699                         the_modes[len] = '\0';
 700
 701                 if (Client_Type(Client) == CLIENT_SERVER) {
 702                         /* MODE requests for local channels from other servers
 703                          * are definitely invalid! */
 704                         if (Channel_IsLocal(Channel)) {
 705                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 706                                 return CONNECTED;
 707                         }
 708
 709                         /* Forward mode changes to channel users and all the
 710                          * other remote servers: */
 711                         IRC_WriteStrServersPrefix(Client, Origin,
 712                                 "MODE %s %s%s", Channel_Name(Channel),
 713                                 the_modes, the_args);
 714                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 715                                 false, "MODE %s %s%s", Channel_Name(Channel),
 716                                 the_modes, the_args);
 717                 } else {
 718                         if (use_servermode)
 719                                 Origin = Client_ThisServer();
 720                         /* Send reply to client and inform other servers and channel users */
 721                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 722                                         "MODE %s %s%s", Channel_Name(Channel),
 723                                         the_modes, the_args);
 724                         /* Only forward requests for non-local channels */
 725                         if (!Channel_IsLocal(Channel))
 726                                 IRC_WriteStrServersPrefix(Client, Origin,
 727                                         "MODE %s %s%s", Channel_Name(Channel),
 728                                         the_modes, the_args);
 729                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 730                                 false, "MODE %s %s%s", Channel_Name(Channel),
 731                                 the_modes, the_args);
 732                 }
 733         }
 734
 735         IRC_SetPenalty(Client, 1);
 736         return connected;
 737 } /* Channel_Mode */
 738
 739
 740 GLOBAL bool
 741 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 742 {
 743         assert( Client != NULL );
 744         assert( Req != NULL );
 745
 746         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 747
 748         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 749         {
 750                 Client_SetAway( Client, Req->argv[0] );
 751                 Client_ModeAdd( Client, 'a' );
 752                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 753                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 754         }
 755         else
 756         {
 757                 Client_ModeDel( Client, 'a' );
 758                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 759                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 760         }
 761 } /* IRC_AWAY */
 762
 763
 764 static bool
 765 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 766 {
 767         const char *mask;
 768         bool already;
 769         bool ret;
 770
 771         assert( Client != NULL );
 772         assert( Channel != NULL );
 773         assert( Pattern != NULL );
 774         assert(what == 'I' || what == 'b');
 775
 776         mask = Lists_MakeMask(Pattern);
 777
 778         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 779         if (!already) {
 780                 if (what == 'I')
 781                         ret = Channel_AddInvite(Channel, mask, false);
 782                 else
 783                         ret = Channel_AddBan(Channel, mask);
 784                 if (!ret)
 785                         return CONNECTED;
 786         }
 787         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 788                 return CONNECTED;
 789
 790         if (what == 'I')
 791                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 792         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 793 }
 794
 795
 796 static bool
 797 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 798 {
 799         const char *mask;
 800         struct list_head *list;
 801
 802         assert( Client != NULL );
 803         assert( Channel != NULL );
 804         assert( Pattern != NULL );
 805         assert(what == 'I' || what == 'b');
 806
 807         mask = Lists_MakeMask( Pattern );
 808
 809         if (what == 'I')
 810                 list = Channel_GetListInvites(Channel);
 811         else
 812                 list = Channel_GetListBans(Channel);
 813
 814         Lists_Del(list, mask);
 815         if (what == 'I')
 816                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 817         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 818 }
 819
 820
 821 static bool
 822 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 823                 CHANNEL *Channel, const char *Mask)
 824 {
 825         bool ok;
 826
 827         if( Client_Type( Client ) == CLIENT_USER )
 828         {
 829                 /* send confirmation to client */
 830                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 831         }
 832         else ok = true;
 833
 834         /* to other servers */
 835         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 836
 837         /* and local users in channel */
 838         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 839
 840         return ok;
 841 } /* Send_ListChange */
 842
 843
 844 /* -eof- */