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                   case '+':
 166                   case '-':
 167                         if ((*mode_ptr == '+' && !set)
 168                             || (*mode_ptr == '-' && set)) {
 169                                 /* Action modifier ("+"/"-") must be changed */
 170                                 len = strlen(the_modes) - 1;
 171                                 if (the_modes[len] == '+'
 172                                     || the_modes[len] == '-') {
 173                                         /* Last character in the "result
 174                                          * string" was an "action", so just
 175                                          * overwrite it with the new action */
 176                                         the_modes[len] = *mode_ptr;
 177                                 } else {
 178                                         /* Append new modifier character to
 179                                          * the resulting mode string */
 180                                         x[0] = *mode_ptr;
 181                                         strlcat(the_modes, x,
 182                                                 sizeof(the_modes));
 183                                 }
 184                                 if (*mode_ptr == '+')
 185                                         set = true;
 186                                 else
 187                                         set = false;
 188                         }
 189                         continue;
 190                 }
 191
 192                 /* Validate modes */
 193                 x[0] = '\0';
 194                 switch (*mode_ptr) {
 195                 case 'i': /* Invisible */
 196                 case 's': /* Server messages */
 197                 case 'w': /* Wallops messages */
 198                         x[0] = *mode_ptr;
 199                         break;
 200                 case 'a': /* Away */
 201                         if (Client_Type(Client) == CLIENT_SERVER) {
 202                                 x[0] = 'a';
 203                                 Client_SetAway(Origin, DEFAULT_AWAY_MSG);
 204                         } else
 205                                 ok = IRC_WriteStrClient(Origin,
 206                                                         ERR_NOPRIVILEGES_MSG,
 207                                                         Client_ID(Origin));
 208                         break;
 209                 case 'c': /* Receive connect notices
 210                            * (only settable by IRC operators!) */
 211                         if (!set || Client_Type(Client) == CLIENT_SERVER
 212                             || Client_OperByMe(Origin))
 213                                 x[0] = 'c';
 214                         else
 215                                 ok = IRC_WriteStrClient(Origin,
 216                                                         ERR_NOPRIVILEGES_MSG,
 217                                                         Client_ID(Origin));
 218                         break;
 219                 case 'o': /* IRC operator (only unsettable!) */
 220                         if (!set || Client_Type(Client) == CLIENT_SERVER) {
 221                                 Client_SetOperByMe(Target, false);
 222                                 x[0] = 'o';
 223                         } else
 224                                 ok = IRC_WriteStrClient(Origin,
 225                                                         ERR_NOPRIVILEGES_MSG,
 226                                                         Client_ID(Origin));
 227                         break;
 228                 case 'r': /* Restricted (only settable) */
 229                         if (set || Client_Type(Client) == CLIENT_SERVER)
 230                                 x[0] = 'r';
 231                         else
 232                                 ok = IRC_WriteStrClient(Origin,
 233                                                         ERR_RESTRICTED_MSG,
 234                                                         Client_ID(Origin));
 235                         break;
 236                 case 'x': /* Cloak hostname */
 237                         if (Client_HasMode(Client, 'r'))
 238                                 ok = IRC_WriteStrClient(Origin,
 239                                                         ERR_RESTRICTED_MSG,
 240                                                         Client_ID(Origin));
 241                         else
 242                                 x[0] = 'x';
 243                         break;
 244                 default:
 245                         if (Client_Type(Client) != CLIENT_SERVER) {
 246                                 Log(LOG_DEBUG,
 247                                     "Unknown mode \"%c%c\" from \"%s\"!?",
 248                                     set ? '+' : '-', *mode_ptr,
 249                                     Client_ID(Origin));
 250                                 ok = IRC_WriteStrClient(Origin,
 251                                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 252                                                         Client_ID(Origin),
 253                                                         set ? '+' : '-',
 254                                                         *mode_ptr);
 255                                 x[0] = '\0';
 256                                 goto client_exit;
 257                         } else {
 258                                 Log(LOG_DEBUG,
 259                                     "Handling unknown mode \"%c%c\" from \"%s\" for \"%s\" ...",
 260                                     set ? '+' : '-', *mode_ptr,
 261                                     Client_ID(Origin), Client_ID(Target));
 262                                 x[0] = *mode_ptr;
 263                         }
 264                 }
 265
 266                 if (!ok)
 267                         break;
 268
 269                 /* Is there a valid mode change? */
 270                 if (!x[0])
 271                         continue;
 272
 273                 if (set) {
 274                         if (Client_ModeAdd(Target, x[0]))
 275                                 strlcat(the_modes, x, sizeof(the_modes));
 276                 } else {
 277                         if (Client_ModeDel(Target, x[0]))
 278                                 strlcat(the_modes, x, sizeof(the_modes));
 279                 }
 280         }
 281 client_exit:
 282
 283         /* Are there changed modes? */
 284         if (the_modes[1]) {
 285                 /* Remoce needless action modifier characters */
 286                 len = strlen(the_modes) - 1;
 287                 if (the_modes[len] == '+' || the_modes[len] == '-')
 288                         the_modes[len] = '\0';
 289
 290                 if (Client_Type(Client) == CLIENT_SERVER) {
 291                         /* Forward modes to other servers */
 292                         if (Client_Conn(Target) != NONE) {
 293                                 /* Remote server (service?) changed modes
 294                                  * for one of our clients. Inform it! */
 295                                 IRC_WriteStrClientPrefix(Target, Origin,
 296                                                          "MODE %s :%s",
 297                                                          Client_ID(Target),
 298                                                          the_modes);
 299                         }
 300                         IRC_WriteStrServersPrefix(Client, Origin,
 301                                                   "MODE %s :%s",
 302                                                   Client_ID(Target),
 303                                                   the_modes);
 304                 } else {
 305                         /* Send reply to client and inform other servers */
 306                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 307                                                       "MODE %s :%s",
 308                                                       Client_ID(Target),
 309                                                       the_modes);
 310                         IRC_WriteStrServersPrefix(Client, Origin,
 311                                                   "MODE %s :%s",
 312                                                   Client_ID(Target),
 313                                                   the_modes);
 314                 }
 315                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 316                          Client_TypeText(Target), Client_Mask(Target),
 317                          Client_Modes(Target));
 318         }
 319
 320         IRC_SetPenalty(Client, 1);
 321         return ok;
 322 } /* Client_Mode */
 323
 324
 325 static bool
 326 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 327 {
 328         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 329         const char *mode_ptr;
 330
 331         /* Member or not? -- That's the question! */
 332         if (!Channel_IsMemberOf(Channel, Origin))
 333                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 334                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 335
 336         /* The sender is a member: generate extended reply */
 337         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 338         mode_ptr = the_modes;
 339         the_args[0] = '\0';
 340
 341         while(*mode_ptr) {
 342                 switch(*mode_ptr) {
 343                 case 'l':
 344                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 345                         strlcat(the_args, argadd, sizeof(the_args));
 346                         break;
 347                 case 'k':
 348                         strlcat(the_args, " ", sizeof(the_args));
 349                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 350                         break;
 351                 }
 352                 mode_ptr++;
 353         }
 354         if (the_args[0])
 355                 strlcat(the_modes, the_args, sizeof(the_modes));
 356
 357         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 358                                 Client_ID(Origin), Channel_Name(Channel),
 359                                 the_modes))
 360                 return DISCONNECTED;
 361 #ifndef STRICT_RFC
 362         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 363                                   Client_ID(Origin), Channel_Name(Channel),
 364                                   Channel_CreationTime(Channel)))
 365                 return DISCONNECTED;
 366 #endif
 367         return CONNECTED;
 368 }
 369
 370
 371 /**
 372  * Handle channel mode and channel-user mode changes
 373  */
 374 static bool
 375 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 376 {
 377         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 378             argadd[CLIENT_PASS_LEN], *mode_ptr;
 379         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 380         int mode_arg, arg_arg;
 381         CLIENT *client;
 382         long l;
 383         size_t len;
 384
 385         if (Channel_IsModeless(Channel))
 386                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 387                                 Client_ID(Client), Channel_Name(Channel));
 388
 389         /* Mode request: let's answer it :-) */
 390         if (Req->argc <= 1)
 391                 return Channel_Mode_Answer_Request(Origin, Channel);
 392
 393         Channel_CheckAdminRights(Channel, Client, Origin,
 394                                  &onchannel, &modeok, &use_servermode);
 395
 396         if (!onchannel && !modeok)
 397                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 398                                           Client_ID(Origin),
 399                                           Channel_Name(Channel));
 400
 401         mode_arg = 1;
 402         mode_ptr = Req->argv[mode_arg];
 403         if (Req->argc > mode_arg + 1)
 404                 arg_arg = mode_arg + 1;
 405         else
 406                 arg_arg = -1;
 407
 408         /* Initial state: set or unset modes? */
 409         skiponce = false;
 410         switch (*mode_ptr) {
 411         case '-':
 412                 set = false;
 413                 break;
 414         case '+':
 415                 set = true;
 416                 break;
 417         default:
 418                 set = true;
 419                 skiponce = true;
 420         }
 421
 422         /* Prepare reply string */
 423         strcpy(the_modes, set ? "+" : "-");
 424         the_args[0] = '\0';
 425
 426         x[1] = '\0';
 427         connected = CONNECTED;
 428         while (mode_ptr) {
 429                 if (!skiponce)
 430                         mode_ptr++;
 431                 if (!*mode_ptr) {
 432                         /* Try next argument if there's any */
 433                         if (arg_arg > mode_arg)
 434                                 mode_arg = arg_arg;
 435                         else
 436                                 mode_arg++;
 437
 438                         if (mode_arg >= Req->argc)
 439                                 break;
 440                         mode_ptr = Req->argv[mode_arg];
 441
 442                         if (Req->argc > mode_arg + 1)
 443                                 arg_arg = mode_arg + 1;
 444                         else
 445                                 arg_arg = -1;
 446                 }
 447                 skiponce = false;
 448
 449                 switch (*mode_ptr) {
 450                 case '+':
 451                 case '-':
 452                         if (((*mode_ptr == '+') && !set)
 453                             || ((*mode_ptr == '-') && set)) {
 454                                 /* Action modifier ("+"/"-") must be changed ... */
 455                                 len = strlen(the_modes) - 1;
 456                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 457                                         /* Adjust last action modifier in result */
 458                                         the_modes[len] = *mode_ptr;
 459                                 } else {
 460                                         /* Append modifier character to result string */
 461                                         x[0] = *mode_ptr;
 462                                         strlcat(the_modes, x, sizeof(the_modes));
 463                                 }
 464                                 set = *mode_ptr == '+';
 465                         }
 466                         continue;
 467                 }
 468
 469                 /* Are there arguments left? */
 470                 if (arg_arg >= Req->argc)
 471                         arg_arg = -1;
 472
 473                 /* Validate modes */
 474                 x[0] = '\0';
 475                 argadd[0] = '\0';
 476                 client = NULL;
 477                 switch (*mode_ptr) {
 478                 /* --- Channel modes --- */
 479                 case 'i': /* Invite only */
 480                 case 'm': /* Moderated */
 481                 case 'n': /* Only members can write */
 482                 case 'R': /* Registered users only */
 483                 case 's': /* Secret channel */
 484                 case 't': /* Topic locked */
 485                 case 'z': /* Secure connections only */
 486                         if (modeok)
 487                                 x[0] = *mode_ptr;
 488                         else
 489                                 connected = IRC_WriteStrClient(Origin,
 490                                         ERR_CHANOPRIVSNEEDED_MSG,
 491                                         Client_ID(Origin), Channel_Name(Channel));
 492                         break;
 493                 case 'k': /* Channel key */
 494                         if (!set) {
 495                                 if (modeok)
 496                                         x[0] = *mode_ptr;
 497                                 else
 498                                         connected = IRC_WriteStrClient(Origin,
 499                                                 ERR_CHANOPRIVSNEEDED_MSG,
 500                                                 Client_ID(Origin),
 501                                                 Channel_Name(Channel));
 502                                 break;
 503                         }
 504                         if (arg_arg > mode_arg) {
 505                                 if (modeok) {
 506                                         Channel_ModeDel(Channel, 'k');
 507                                         Channel_SetKey(Channel,
 508                                                        Req->argv[arg_arg]);
 509                                         strlcpy(argadd, Channel_Key(Channel),
 510                                                 sizeof(argadd));
 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                                 }
 518                                 Req->argv[arg_arg][0] = '\0';
 519                                 arg_arg++;
 520                         } else {
 521                                 connected = IRC_WriteStrClient(Origin,
 522                                         ERR_NEEDMOREPARAMS_MSG,
 523                                         Client_ID(Origin), Req->command);
 524                                 goto chan_exit;
 525                         }
 526                         break;
 527                 case 'l': /* Member limit */
 528                         if (!set) {
 529                                 if (modeok)
 530                                         x[0] = *mode_ptr;
 531                                 else
 532                                         connected = IRC_WriteStrClient(Origin,
 533                                                 ERR_CHANOPRIVSNEEDED_MSG,
 534                                                 Client_ID(Origin),
 535                                                 Channel_Name(Channel));
 536                                 break;
 537                         }
 538                         if (arg_arg > mode_arg) {
 539                                 if (modeok) {
 540                                         l = atol(Req->argv[arg_arg]);
 541                                         if (l > 0 && l < 0xFFFF) {
 542                                                 Channel_ModeDel(Channel, 'l');
 543                                                 Channel_SetMaxUsers(Channel, l);
 544                                                 snprintf(argadd, sizeof(argadd),
 545                                                          "%ld", l);
 546                                                 x[0] = *mode_ptr;
 547                                         }
 548                                 } else {
 549                                         connected = IRC_WriteStrClient(Origin,
 550                                                 ERR_CHANOPRIVSNEEDED_MSG,
 551                                                 Client_ID(Origin),
 552                                                 Channel_Name(Channel));
 553                                 }
 554                                 Req->argv[arg_arg][0] = '\0';
 555                                 arg_arg++;
 556                         } else {
 557                                 connected = IRC_WriteStrClient(Origin,
 558                                         ERR_NEEDMOREPARAMS_MSG,
 559                                         Client_ID(Origin), Req->command);
 560                                 goto chan_exit;
 561                         }
 562                         break;
 563                 case 'O': /* IRC operators only */
 564                         if (modeok) {
 565                                 /* Only IRC operators are allowed to
 566                                  * set the 'O' channel mode! */
 567                                 if (set && !(Client_OperByMe(Client)
 568                                     || Client_Type(Client) == CLIENT_SERVER))
 569                                         connected = IRC_WriteStrClient(Origin,
 570                                                 ERR_NOPRIVILEGES_MSG,
 571                                                 Client_ID(Origin));
 572                                 else
 573                                         x[0] = 'O';
 574                         } else
 575                                 connected = IRC_WriteStrClient(Origin,
 576                                                 ERR_CHANOPRIVSNEEDED_MSG,
 577                                                 Client_ID(Origin),
 578                                                 Channel_Name(Channel));
 579                                 break;
 580                 case 'P': /* Persistent channel */
 581                         if (modeok) {
 582                                 /* Only IRC operators are allowed to
 583                                  * set the 'P' channel mode! */
 584                                 if (set && !(Client_OperByMe(Client)
 585                                     || Client_Type(Client) == CLIENT_SERVER))
 586                                         connected = IRC_WriteStrClient(Origin,
 587                                                 ERR_NOPRIVILEGES_MSG,
 588                                                 Client_ID(Origin));
 589                                 else
 590                                         x[0] = 'P';
 591                         } else
 592                                 connected = IRC_WriteStrClient(Origin,
 593                                         ERR_CHANOPRIVSNEEDED_MSG,
 594                                         Client_ID(Origin),
 595                                         Channel_Name(Channel));
 596                         break;
 597                 /* --- Channel user modes --- */
 598                 case 'a':
 599                 case 'h':
 600                 case 'q':
 601                         if (Client_Type(Client) != CLIENT_SERVER) {
 602                                 connected = IRC_WriteStrClient(Origin,
 603                                         ERR_CHANOPRIVSNEEDED_MSG,
 604                                         Client_ID(Origin),
 605                                         Channel_Name(Channel));
 606                                 goto chan_exit;
 607                         }
 608                 case 'o': /* Channel operator */
 609                 case 'v': /* Voice */
 610                         if (arg_arg > mode_arg) {
 611                                 if (modeok) {
 612                                         client = Client_Search(Req->argv[arg_arg]);
 613                                         if (client)
 614                                                 x[0] = *mode_ptr;
 615                                         else
 616                                                 connected = IRC_WriteStrClient(Client,
 617                                                         ERR_NOSUCHNICK_MSG,
 618                                                         Client_ID(Client),
 619                                                         Req->argv[arg_arg]);
 620                                 } else {
 621                                         connected = IRC_WriteStrClient(Origin,
 622                                                 ERR_CHANOPRIVSNEEDED_MSG,
 623                                                 Client_ID(Origin),
 624                                                 Channel_Name(Channel));
 625                                 }
 626                                 Req->argv[arg_arg][0] = '\0';
 627                                 arg_arg++;
 628                         } else {
 629                                 connected = IRC_WriteStrClient(Origin,
 630                                         ERR_NEEDMOREPARAMS_MSG,
 631                                         Client_ID(Origin), Req->command);
 632                                 goto chan_exit;
 633                         }
 634                         break;
 635                 /* --- Channel lists --- */
 636                 case 'I': /* Invite lists */
 637                 case 'b': /* Ban lists */
 638                         if (arg_arg > mode_arg) {
 639                                 /* modify list */
 640                                 if (modeok) {
 641                                         connected = set
 642                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 643                                                 Client, Channel,
 644                                                 Req->argv[arg_arg])
 645                                            : Del_Ban_Invite(*mode_ptr, Origin,
 646                                                 Client, Channel,
 647                                                 Req->argv[arg_arg]);
 648                                 } else {
 649                                         connected = IRC_WriteStrClient(Origin,
 650                                                 ERR_CHANOPRIVSNEEDED_MSG,
 651                                                 Client_ID(Origin),
 652                                                 Channel_Name(Channel));
 653                                 }
 654                                 Req->argv[arg_arg][0] = '\0';
 655                                 arg_arg++;
 656                         } else {
 657                                 if (*mode_ptr == 'I')
 658                                         Channel_ShowInvites(Origin, Channel);
 659                                 else
 660                                         Channel_ShowBans(Origin, Channel);
 661                         }
 662                         break;
 663                 default:
 664                         if (Client_Type(Client) != CLIENT_SERVER) {
 665                                 Log(LOG_DEBUG,
 666                                     "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 667                                     set ? '+' : '-', *mode_ptr,
 668                                     Client_ID(Origin), Channel_Name(Channel));
 669                                 connected = IRC_WriteStrClient(Origin,
 670                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 671                                         Client_ID(Origin),
 672                                         set ? '+' : '-', *mode_ptr);
 673                                 x[0] = '\0';
 674                                 goto chan_exit;
 675                         } else {
 676                                 Log(LOG_DEBUG,
 677                                     "Handling unknown mode \"%c%c\" from \"%s\" on %s ...",
 678                                     set ? '+' : '-', *mode_ptr,
 679                                     Client_ID(Origin), Channel_Name(Channel));
 680                                 x[0] = *mode_ptr;
 681                         }
 682                 }
 683
 684                 if (!connected)
 685                         break;
 686
 687                 /* Is there a valid mode change? */
 688                 if (!x[0])
 689                         continue;
 690
 691                 /* Validate target client */
 692                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 693                         if (!IRC_WriteStrClient
 694                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 695                              Client_ID(Origin), Client_ID(client),
 696                              Channel_Name(Channel)))
 697                                 break;
 698
 699                         continue;
 700                 }
 701
 702                 if (client) {
 703                         /* Channel-User-Mode */
 704                         retval = set
 705                                ? Channel_UserModeAdd(Channel, client, x[0])
 706                                : Channel_UserModeDel(Channel, client, x[0]);
 707                         if (retval) {
 708                                 strlcat(the_args, " ", sizeof(the_args));
 709                                 strlcat(the_args, Client_ID(client),
 710                                         sizeof(the_args));
 711                                 strlcat(the_modes, x, sizeof(the_modes));
 712                                 LogDebug
 713                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 714                                      Client_Mask(client), Channel_Name(Channel),
 715                                      Channel_UserModes(Channel, client));
 716                         }
 717                 } else {
 718                         /* Channel-Mode */
 719                         retval = set
 720                                ? Channel_ModeAdd(Channel, x[0])
 721                                : Channel_ModeDel(Channel, x[0]);
 722                         if (retval) {
 723                                 strlcat(the_modes, x, sizeof(the_modes));
 724                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 725                                          Channel_Name(Channel),
 726                                          Channel_Modes(Channel));
 727                         }
 728                 }
 729
 730                 /* Are there additional arguments to add? */
 731                 if (argadd[0]) {
 732                         strlcat(the_args, " ", sizeof(the_args));
 733                         strlcat(the_args, argadd, sizeof(the_args));
 734                 }
 735         }
 736
 737       chan_exit:
 738         /* Are there changed modes? */
 739         if (the_modes[1]) {
 740                 /* Clean up mode string */
 741                 len = strlen(the_modes) - 1;
 742                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 743                         the_modes[len] = '\0';
 744
 745                 if (Client_Type(Client) == CLIENT_SERVER) {
 746                         /* MODE requests for local channels from other servers
 747                          * are definitely invalid! */
 748                         if (Channel_IsLocal(Channel)) {
 749                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 750                                 return CONNECTED;
 751                         }
 752
 753                         /* Forward mode changes to channel users and all the
 754                          * other remote servers: */
 755                         IRC_WriteStrServersPrefix(Client, Origin,
 756                                 "MODE %s %s%s", Channel_Name(Channel),
 757                                 the_modes, the_args);
 758                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 759                                 false, "MODE %s %s%s", Channel_Name(Channel),
 760                                 the_modes, the_args);
 761                 } else {
 762                         if (use_servermode)
 763                                 Origin = Client_ThisServer();
 764                         /* Send reply to client and inform other servers and channel users */
 765                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 766                                         "MODE %s %s%s", Channel_Name(Channel),
 767                                         the_modes, the_args);
 768                         /* Only forward requests for non-local channels */
 769                         if (!Channel_IsLocal(Channel))
 770                                 IRC_WriteStrServersPrefix(Client, Origin,
 771                                         "MODE %s %s%s", Channel_Name(Channel),
 772                                         the_modes, the_args);
 773                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 774                                 false, "MODE %s %s%s", Channel_Name(Channel),
 775                                 the_modes, the_args);
 776                 }
 777         }
 778
 779         IRC_SetPenalty(Client, 1);
 780         return connected;
 781 } /* Channel_Mode */
 782
 783
 784 GLOBAL bool
 785 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 786 {
 787         assert( Client != NULL );
 788         assert( Req != NULL );
 789
 790         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 791
 792         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 793         {
 794                 Client_SetAway( Client, Req->argv[0] );
 795                 Client_ModeAdd( Client, 'a' );
 796                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 797                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 798         }
 799         else
 800         {
 801                 Client_ModeDel( Client, 'a' );
 802                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 803                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 804         }
 805 } /* IRC_AWAY */
 806
 807
 808 static bool
 809 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 810 {
 811         const char *mask;
 812         bool already;
 813         bool ret;
 814
 815         assert( Client != NULL );
 816         assert( Channel != NULL );
 817         assert( Pattern != NULL );
 818         assert(what == 'I' || what == 'b');
 819
 820         mask = Lists_MakeMask(Pattern);
 821
 822         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 823         if (!already) {
 824                 if (what == 'I')
 825                         ret = Channel_AddInvite(Channel, mask, false);
 826                 else
 827                         ret = Channel_AddBan(Channel, mask);
 828                 if (!ret)
 829                         return CONNECTED;
 830         }
 831         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 832                 return CONNECTED;
 833
 834         if (what == 'I')
 835                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 836         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 837 }
 838
 839
 840 static bool
 841 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 842 {
 843         const char *mask;
 844         struct list_head *list;
 845
 846         assert( Client != NULL );
 847         assert( Channel != NULL );
 848         assert( Pattern != NULL );
 849         assert(what == 'I' || what == 'b');
 850
 851         mask = Lists_MakeMask( Pattern );
 852
 853         if (what == 'I')
 854                 list = Channel_GetListInvites(Channel);
 855         else
 856                 list = Channel_GetListBans(Channel);
 857
 858         Lists_Del(list, mask);
 859         if (what == 'I')
 860                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 861         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 862 }
 863
 864
 865 static bool
 866 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 867                 CHANNEL *Channel, const char *Mask)
 868 {
 869         bool ok;
 870
 871         if( Client_Type( Client ) == CLIENT_USER )
 872         {
 873                 /* send confirmation to client */
 874                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 875         }
 876         else ok = true;
 877
 878         /* to other servers */
 879         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 880
 881         /* and local users in channel */
 882         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 883
 884         return ok;
 885 } /* Send_ListChange */
 886
 887
 888 /* -eof- */