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                         if (Client_Conn(Target) != NONE) {
 275                                 /* Remote server (service?) changed modes
 276                                  * for one of our clients. Inform it! */
 277                                 IRC_WriteStrClientPrefix(Target, Origin,
 278                                                          "MODE %s :%s",
 279                                                          Client_ID(Target),
 280                                                          the_modes);
 281                         }
 282                         IRC_WriteStrServersPrefix(Client, Origin,
 283                                                   "MODE %s :%s",
 284                                                   Client_ID(Target),
 285                                                   the_modes);
 286                 } else {
 287                         /* Send reply to client and inform other servers */
 288                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 289                                                       "MODE %s :%s",
 290                                                       Client_ID(Target),
 291                                                       the_modes);
 292                         IRC_WriteStrServersPrefix(Client, Origin,
 293                                                   "MODE %s :%s",
 294                                                   Client_ID(Target),
 295                                                   the_modes);
 296                 }
 297                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 298                          Client_TypeText(Target), Client_Mask(Target),
 299                          Client_Modes(Target));
 300         }
 301
 302         IRC_SetPenalty(Client, 1);
 303         return ok;
 304 } /* Client_Mode */
 305
 306
 307 static bool
 308 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 309 {
 310         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 311         const char *mode_ptr;
 312
 313         /* Member or not? -- That's the question! */
 314         if (!Channel_IsMemberOf(Channel, Origin))
 315                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 316                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 317
 318         /* The sender is a member: generate extended reply */
 319         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 320         mode_ptr = the_modes;
 321         the_args[0] = '\0';
 322
 323         while(*mode_ptr) {
 324                 switch(*mode_ptr) {
 325                 case 'l':
 326                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 327                         strlcat(the_args, argadd, sizeof(the_args));
 328                         break;
 329                 case 'k':
 330                         strlcat(the_args, " ", sizeof(the_args));
 331                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 332                         break;
 333                 }
 334                 mode_ptr++;
 335         }
 336         if (the_args[0])
 337                 strlcat(the_modes, the_args, sizeof(the_modes));
 338
 339         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 340                                 Client_ID(Origin), Channel_Name(Channel),
 341                                 the_modes))
 342                 return DISCONNECTED;
 343 #ifndef STRICT_RFC
 344         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 345                                   Client_ID(Origin), Channel_Name(Channel),
 346                                   Channel_CreationTime(Channel)))
 347                 return DISCONNECTED;
 348 #endif
 349         return CONNECTED;
 350 }
 351
 352
 353 /**
 354  * Handle channel mode and channel-user mode changes
 355  */
 356 static bool
 357 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 358 {
 359         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 360             argadd[CLIENT_PASS_LEN], *mode_ptr;
 361         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 362         int mode_arg, arg_arg;
 363         CLIENT *client;
 364         long l;
 365         size_t len;
 366
 367         if (Channel_IsModeless(Channel))
 368                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 369                                 Client_ID(Client), Channel_Name(Channel));
 370
 371         /* Mode request: let's answer it :-) */
 372         if (Req->argc <= 1)
 373                 return Channel_Mode_Answer_Request(Origin, Channel);
 374
 375         Channel_CheckAdminRights(Channel, Client, Origin,
 376                                  &onchannel, &modeok, &use_servermode);
 377
 378         if (!onchannel && !modeok)
 379                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 380                                           Client_ID(Origin),
 381                                           Channel_Name(Channel));
 382
 383         mode_arg = 1;
 384         mode_ptr = Req->argv[mode_arg];
 385         if (Req->argc > mode_arg + 1)
 386                 arg_arg = mode_arg + 1;
 387         else
 388                 arg_arg = -1;
 389
 390         /* Initial state: set or unset modes? */
 391         skiponce = false;
 392         switch (*mode_ptr) {
 393         case '-':
 394                 set = false;
 395                 break;
 396         case '+':
 397                 set = true;
 398                 break;
 399         default:
 400                 set = true;
 401                 skiponce = true;
 402         }
 403
 404         /* Prepare reply string */
 405         strcpy(the_modes, set ? "+" : "-");
 406         the_args[0] = '\0';
 407
 408         x[1] = '\0';
 409         connected = CONNECTED;
 410         while (mode_ptr) {
 411                 if (!skiponce)
 412                         mode_ptr++;
 413                 if (!*mode_ptr) {
 414                         /* Try next argument if there's any */
 415                         if (arg_arg > mode_arg)
 416                                 mode_arg = arg_arg;
 417                         else
 418                                 mode_arg++;
 419
 420                         if (mode_arg >= Req->argc)
 421                                 break;
 422                         mode_ptr = Req->argv[mode_arg];
 423
 424                         if (Req->argc > mode_arg + 1)
 425                                 arg_arg = mode_arg + 1;
 426                         else
 427                                 arg_arg = -1;
 428                 }
 429                 skiponce = false;
 430
 431                 switch (*mode_ptr) {
 432                 case '+':
 433                 case '-':
 434                         if (((*mode_ptr == '+') && !set)
 435                             || ((*mode_ptr == '-') && set)) {
 436                                 /* Action modifier ("+"/"-") must be changed ... */
 437                                 len = strlen(the_modes) - 1;
 438                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 439                                         /* Adjust last action modifier in result */
 440                                         the_modes[len] = *mode_ptr;
 441                                 } else {
 442                                         /* Append modifier character to result string */
 443                                         x[0] = *mode_ptr;
 444                                         strlcat(the_modes, x, sizeof(the_modes));
 445                                 }
 446                                 set = *mode_ptr == '+';
 447                         }
 448                         continue;
 449                 }
 450
 451                 /* Are there arguments left? */
 452                 if (arg_arg >= Req->argc)
 453                         arg_arg = -1;
 454
 455                 /* Validate modes */
 456                 x[0] = '\0';
 457                 argadd[0] = '\0';
 458                 client = NULL;
 459                 switch (*mode_ptr) {
 460                 /* --- Channel modes --- */
 461                 case 'i': /* Invite only */
 462                 case 'm': /* Moderated */
 463                 case 'n': /* Only members can write */
 464                 case 's': /* Secret channel */
 465                 case 't': /* Topic locked */
 466                 case 'z': /* Secure connections only */
 467                         if (modeok)
 468                                 x[0] = *mode_ptr;
 469                         else
 470                                 connected = IRC_WriteStrClient(Origin,
 471                                         ERR_CHANOPRIVSNEEDED_MSG,
 472                                         Client_ID(Origin), Channel_Name(Channel));
 473                         break;
 474                 case 'k': /* Channel key */
 475                         if (!set) {
 476                                 if (modeok)
 477                                         x[0] = *mode_ptr;
 478                                 else
 479                                         connected = IRC_WriteStrClient(Origin,
 480                                                 ERR_CHANOPRIVSNEEDED_MSG,
 481                                                 Client_ID(Origin),
 482                                                 Channel_Name(Channel));
 483                                 break;
 484                         }
 485                         if (arg_arg > mode_arg) {
 486                                 if (modeok) {
 487                                         Channel_ModeDel(Channel, 'k');
 488                                         Channel_SetKey(Channel,
 489                                                        Req->argv[arg_arg]);
 490                                         strlcpy(argadd, Channel_Key(Channel),
 491                                                 sizeof(argadd));
 492                                         x[0] = *mode_ptr;
 493                                 } else {
 494                                         connected = IRC_WriteStrClient(Origin,
 495                                                 ERR_CHANOPRIVSNEEDED_MSG,
 496                                                 Client_ID(Origin),
 497                                                 Channel_Name(Channel));
 498                                 }
 499                                 Req->argv[arg_arg][0] = '\0';
 500                                 arg_arg++;
 501                         } else {
 502                                 connected = IRC_WriteStrClient(Origin,
 503                                         ERR_NEEDMOREPARAMS_MSG,
 504                                         Client_ID(Origin), Req->command);
 505                                 goto chan_exit;
 506                         }
 507                         break;
 508                 case 'l': /* Member limit */
 509                         if (!set) {
 510                                 if (modeok)
 511                                         x[0] = *mode_ptr;
 512                                 else
 513                                         connected = IRC_WriteStrClient(Origin,
 514                                                 ERR_CHANOPRIVSNEEDED_MSG,
 515                                                 Client_ID(Origin),
 516                                                 Channel_Name(Channel));
 517                                 break;
 518                         }
 519                         if (arg_arg > mode_arg) {
 520                                 if (modeok) {
 521                                         l = atol(Req->argv[arg_arg]);
 522                                         if (l > 0 && l < 0xFFFF) {
 523                                                 Channel_ModeDel(Channel, 'l');
 524                                                 Channel_SetMaxUsers(Channel, l);
 525                                                 snprintf(argadd, sizeof(argadd),
 526                                                          "%ld", l);
 527                                                 x[0] = *mode_ptr;
 528                                         }
 529                                 } else {
 530                                         connected = IRC_WriteStrClient(Origin,
 531                                                 ERR_CHANOPRIVSNEEDED_MSG,
 532                                                 Client_ID(Origin),
 533                                                 Channel_Name(Channel));
 534                                 }
 535                                 Req->argv[arg_arg][0] = '\0';
 536                                 arg_arg++;
 537                         } else {
 538                                 connected = IRC_WriteStrClient(Origin,
 539                                         ERR_NEEDMOREPARAMS_MSG,
 540                                         Client_ID(Origin), Req->command);
 541                                 goto chan_exit;
 542                         }
 543                         break;
 544                 case 'O': /* IRC operators only */
 545                         if (modeok) {
 546                                 /* Only IRC operators are allowed to
 547                                  * set the 'O' channel mode! */
 548                                 if (set && !(Client_OperByMe(Client)
 549                                     || Client_Type(Client) == CLIENT_SERVER))
 550                                         connected = IRC_WriteStrClient(Origin,
 551                                                 ERR_NOPRIVILEGES_MSG,
 552                                                 Client_ID(Origin));
 553                                 else
 554                                         x[0] = 'O';
 555                         } else
 556                                 connected = IRC_WriteStrClient(Origin,
 557                                                 ERR_CHANOPRIVSNEEDED_MSG,
 558                                                 Client_ID(Origin),
 559                                                 Channel_Name(Channel));
 560                                 break;
 561                 case 'P': /* Persistent channel */
 562                         if (modeok) {
 563                                 /* Only IRC operators are allowed to
 564                                  * set the 'P' channel mode! */
 565                                 if (set && !(Client_OperByMe(Client)
 566                                     || Client_Type(Client) == CLIENT_SERVER))
 567                                         connected = IRC_WriteStrClient(Origin,
 568                                                 ERR_NOPRIVILEGES_MSG,
 569                                                 Client_ID(Origin));
 570                                 else
 571                                         x[0] = 'P';
 572                         } else
 573                                 connected = IRC_WriteStrClient(Origin,
 574                                         ERR_CHANOPRIVSNEEDED_MSG,
 575                                         Client_ID(Origin),
 576                                         Channel_Name(Channel));
 577                         break;
 578                 /* --- Channel user modes --- */
 579                 case 'o': /* Channel operator */
 580                 case 'v': /* Voice */
 581                         if (arg_arg > mode_arg) {
 582                                 if (modeok) {
 583                                         client = Client_Search(Req->argv[arg_arg]);
 584                                         if (client)
 585                                                 x[0] = *mode_ptr;
 586                                         else
 587                                                 connected = IRC_WriteStrClient(Client,
 588                                                         ERR_NOSUCHNICK_MSG,
 589                                                         Client_ID(Client),
 590                                                         Req->argv[arg_arg]);
 591                                 } else {
 592                                         connected = IRC_WriteStrClient(Origin,
 593                                                 ERR_CHANOPRIVSNEEDED_MSG,
 594                                                 Client_ID(Origin),
 595                                                 Channel_Name(Channel));
 596                                 }
 597                                 Req->argv[arg_arg][0] = '\0';
 598                                 arg_arg++;
 599                         } else {
 600                                 connected = IRC_WriteStrClient(Origin,
 601                                         ERR_NEEDMOREPARAMS_MSG,
 602                                         Client_ID(Origin), Req->command);
 603                                 goto chan_exit;
 604                         }
 605                         break;
 606                 /* --- Channel lists --- */
 607                 case 'I': /* Invite lists */
 608                 case 'b': /* Ban lists */
 609                         if (arg_arg > mode_arg) {
 610                                 /* modify list */
 611                                 if (modeok) {
 612                                         connected = set
 613                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 614                                                 Client, Channel,
 615                                                 Req->argv[arg_arg])
 616                                            : Del_Ban_Invite(*mode_ptr, Origin,
 617                                                 Client, Channel,
 618                                                 Req->argv[arg_arg]);
 619                                 } else {
 620                                         connected = IRC_WriteStrClient(Origin,
 621                                                 ERR_CHANOPRIVSNEEDED_MSG,
 622                                                 Client_ID(Origin),
 623                                                 Channel_Name(Channel));
 624                                 }
 625                                 Req->argv[arg_arg][0] = '\0';
 626                                 arg_arg++;
 627                         } else {
 628                                 if (*mode_ptr == 'I')
 629                                         Channel_ShowInvites(Origin, Channel);
 630                                 else
 631                                         Channel_ShowBans(Origin, Channel);
 632                         }
 633                         break;
 634                 default:
 635                         Log(LOG_DEBUG,
 636                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 637                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 638                             Channel_Name(Channel));
 639                         if (Client_Type(Client) != CLIENT_SERVER)
 640                                 connected = IRC_WriteStrClient(Origin,
 641                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 642                                         Client_ID(Origin),
 643                                         set ? '+' : '-', *mode_ptr);
 644                         x[0] = '\0';
 645                         goto chan_exit;
 646                 }       /* switch() */
 647
 648                 if (!connected)
 649                         break;
 650
 651                 /* Is there a valid mode change? */
 652                 if (!x[0])
 653                         continue;
 654
 655                 /* Validate target client */
 656                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 657                         if (!IRC_WriteStrClient
 658                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 659                              Client_ID(Origin), Client_ID(client),
 660                              Channel_Name(Channel)))
 661                                 break;
 662
 663                         continue;
 664                 }
 665
 666                 if (client) {
 667                         /* Channel-User-Mode */
 668                         retval = set
 669                                ? Channel_UserModeAdd(Channel, client, x[0])
 670                                : Channel_UserModeDel(Channel, client, x[0]);
 671                         if (retval) {
 672                                 strlcat(the_args, " ", sizeof(the_args));
 673                                 strlcat(the_args, Client_ID(client),
 674                                         sizeof(the_args));
 675                                 strlcat(the_modes, x, sizeof(the_modes));
 676                                 LogDebug
 677                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 678                                      Client_Mask(client), Channel_Name(Channel),
 679                                      Channel_UserModes(Channel, client));
 680                         }
 681                 } else {
 682                         /* Channel-Mode */
 683                         retval = set
 684                                ? Channel_ModeAdd(Channel, x[0])
 685                                : Channel_ModeDel(Channel, x[0]);
 686                         if (retval) {
 687                                 strlcat(the_modes, x, sizeof(the_modes));
 688                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 689                                          Channel_Name(Channel),
 690                                          Channel_Modes(Channel));
 691                         }
 692                 }
 693
 694                 /* Are there additional arguments to add? */
 695                 if (argadd[0]) {
 696                         strlcat(the_args, " ", sizeof(the_args));
 697                         strlcat(the_args, argadd, sizeof(the_args));
 698                 }
 699         }
 700
 701       chan_exit:
 702         /* Are there changed modes? */
 703         if (the_modes[1]) {
 704                 /* Clean up mode string */
 705                 len = strlen(the_modes) - 1;
 706                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 707                         the_modes[len] = '\0';
 708
 709                 if (Client_Type(Client) == CLIENT_SERVER) {
 710                         /* MODE requests for local channels from other servers
 711                          * are definitely invalid! */
 712                         if (Channel_IsLocal(Channel)) {
 713                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 714                                 return CONNECTED;
 715                         }
 716
 717                         /* Forward mode changes to channel users and all the
 718                          * other remote servers: */
 719                         IRC_WriteStrServersPrefix(Client, Origin,
 720                                 "MODE %s %s%s", Channel_Name(Channel),
 721                                 the_modes, the_args);
 722                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 723                                 false, "MODE %s %s%s", Channel_Name(Channel),
 724                                 the_modes, the_args);
 725                 } else {
 726                         if (use_servermode)
 727                                 Origin = Client_ThisServer();
 728                         /* Send reply to client and inform other servers and channel users */
 729                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 730                                         "MODE %s %s%s", Channel_Name(Channel),
 731                                         the_modes, the_args);
 732                         /* Only forward requests for non-local channels */
 733                         if (!Channel_IsLocal(Channel))
 734                                 IRC_WriteStrServersPrefix(Client, Origin,
 735                                         "MODE %s %s%s", Channel_Name(Channel),
 736                                         the_modes, the_args);
 737                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 738                                 false, "MODE %s %s%s", Channel_Name(Channel),
 739                                 the_modes, the_args);
 740                 }
 741         }
 742
 743         IRC_SetPenalty(Client, 1);
 744         return connected;
 745 } /* Channel_Mode */
 746
 747
 748 GLOBAL bool
 749 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 750 {
 751         assert( Client != NULL );
 752         assert( Req != NULL );
 753
 754         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 755
 756         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 757         {
 758                 Client_SetAway( Client, Req->argv[0] );
 759                 Client_ModeAdd( Client, 'a' );
 760                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 761                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 762         }
 763         else
 764         {
 765                 Client_ModeDel( Client, 'a' );
 766                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 767                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 768         }
 769 } /* IRC_AWAY */
 770
 771
 772 static bool
 773 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 774 {
 775         const char *mask;
 776         bool already;
 777         bool ret;
 778
 779         assert( Client != NULL );
 780         assert( Channel != NULL );
 781         assert( Pattern != NULL );
 782         assert(what == 'I' || what == 'b');
 783
 784         mask = Lists_MakeMask(Pattern);
 785
 786         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 787         if (!already) {
 788                 if (what == 'I')
 789                         ret = Channel_AddInvite(Channel, mask, false);
 790                 else
 791                         ret = Channel_AddBan(Channel, mask);
 792                 if (!ret)
 793                         return CONNECTED;
 794         }
 795         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 796                 return CONNECTED;
 797
 798         if (what == 'I')
 799                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 800         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 801 }
 802
 803
 804 static bool
 805 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 806 {
 807         const char *mask;
 808         struct list_head *list;
 809
 810         assert( Client != NULL );
 811         assert( Channel != NULL );
 812         assert( Pattern != NULL );
 813         assert(what == 'I' || what == 'b');
 814
 815         mask = Lists_MakeMask( Pattern );
 816
 817         if (what == 'I')
 818                 list = Channel_GetListInvites(Channel);
 819         else
 820                 list = Channel_GetListBans(Channel);
 821
 822         Lists_Del(list, mask);
 823         if (what == 'I')
 824                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 825         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 826 }
 827
 828
 829 static bool
 830 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 831                 CHANNEL *Channel, const char *Mask)
 832 {
 833         bool ok;
 834
 835         if( Client_Type( Client ) == CLIENT_USER )
 836         {
 837                 /* send confirmation to client */
 838                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 839         }
 840         else ok = true;
 841
 842         /* to other servers */
 843         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 844
 845         /* and local users in channel */
 846         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 847
 848         return ok;
 849 } /* Send_ListChange */
 850
 851
 852 /* -eof- */