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                         Log(LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?",
 246                             set ? '+' : '-', *mode_ptr, Client_ID(Origin));
 247                         if (Client_Type(Client) != CLIENT_SERVER)
 248                                 ok = IRC_WriteStrClient(Origin,
 249                                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 250                                                         Client_ID(Origin),
 251                                                         set ? '+' : '-',
 252                                                         *mode_ptr);
 253                         x[0] = '\0';
 254                         goto client_exit;
 255                 }
 256
 257                 if (!ok)
 258                         break;
 259
 260                 /* Is there a valid mode change? */
 261                 if (!x[0])
 262                         continue;
 263
 264                 if (set) {
 265                         if (Client_ModeAdd(Target, x[0]))
 266                                 strlcat(the_modes, x, sizeof(the_modes));
 267                 } else {
 268                         if (Client_ModeDel(Target, x[0]))
 269                                 strlcat(the_modes, x, sizeof(the_modes));
 270                 }
 271         }
 272 client_exit:
 273
 274         /* Are there changed modes? */
 275         if (the_modes[1]) {
 276                 /* Remoce needless action modifier characters */
 277                 len = strlen(the_modes) - 1;
 278                 if (the_modes[len] == '+' || the_modes[len] == '-')
 279                         the_modes[len] = '\0';
 280
 281                 if (Client_Type(Client) == CLIENT_SERVER) {
 282                         /* Forward modes to other servers */
 283                         if (Client_Conn(Target) != NONE) {
 284                                 /* Remote server (service?) changed modes
 285                                  * for one of our clients. Inform it! */
 286                                 IRC_WriteStrClientPrefix(Target, Origin,
 287                                                          "MODE %s :%s",
 288                                                          Client_ID(Target),
 289                                                          the_modes);
 290                         }
 291                         IRC_WriteStrServersPrefix(Client, Origin,
 292                                                   "MODE %s :%s",
 293                                                   Client_ID(Target),
 294                                                   the_modes);
 295                 } else {
 296                         /* Send reply to client and inform other servers */
 297                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 298                                                       "MODE %s :%s",
 299                                                       Client_ID(Target),
 300                                                       the_modes);
 301                         IRC_WriteStrServersPrefix(Client, Origin,
 302                                                   "MODE %s :%s",
 303                                                   Client_ID(Target),
 304                                                   the_modes);
 305                 }
 306                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 307                          Client_TypeText(Target), Client_Mask(Target),
 308                          Client_Modes(Target));
 309         }
 310
 311         IRC_SetPenalty(Client, 1);
 312         return ok;
 313 } /* Client_Mode */
 314
 315
 316 static bool
 317 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 318 {
 319         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 320         const char *mode_ptr;
 321
 322         /* Member or not? -- That's the question! */
 323         if (!Channel_IsMemberOf(Channel, Origin))
 324                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 325                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 326
 327         /* The sender is a member: generate extended reply */
 328         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 329         mode_ptr = the_modes;
 330         the_args[0] = '\0';
 331
 332         while(*mode_ptr) {
 333                 switch(*mode_ptr) {
 334                 case 'l':
 335                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 336                         strlcat(the_args, argadd, sizeof(the_args));
 337                         break;
 338                 case 'k':
 339                         strlcat(the_args, " ", sizeof(the_args));
 340                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 341                         break;
 342                 }
 343                 mode_ptr++;
 344         }
 345         if (the_args[0])
 346                 strlcat(the_modes, the_args, sizeof(the_modes));
 347
 348         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 349                                 Client_ID(Origin), Channel_Name(Channel),
 350                                 the_modes))
 351                 return DISCONNECTED;
 352 #ifndef STRICT_RFC
 353         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 354                                   Client_ID(Origin), Channel_Name(Channel),
 355                                   Channel_CreationTime(Channel)))
 356                 return DISCONNECTED;
 357 #endif
 358         return CONNECTED;
 359 }
 360
 361
 362 /**
 363  * Handle channel mode and channel-user mode changes
 364  */
 365 static bool
 366 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 367 {
 368         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 369             argadd[CLIENT_PASS_LEN], *mode_ptr;
 370         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 371         int mode_arg, arg_arg;
 372         CLIENT *client;
 373         long l;
 374         size_t len;
 375
 376         if (Channel_IsModeless(Channel))
 377                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 378                                 Client_ID(Client), Channel_Name(Channel));
 379
 380         /* Mode request: let's answer it :-) */
 381         if (Req->argc <= 1)
 382                 return Channel_Mode_Answer_Request(Origin, Channel);
 383
 384         Channel_CheckAdminRights(Channel, Client, Origin,
 385                                  &onchannel, &modeok, &use_servermode);
 386
 387         if (!onchannel && !modeok)
 388                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 389                                           Client_ID(Origin),
 390                                           Channel_Name(Channel));
 391
 392         mode_arg = 1;
 393         mode_ptr = Req->argv[mode_arg];
 394         if (Req->argc > mode_arg + 1)
 395                 arg_arg = mode_arg + 1;
 396         else
 397                 arg_arg = -1;
 398
 399         /* Initial state: set or unset modes? */
 400         skiponce = false;
 401         switch (*mode_ptr) {
 402         case '-':
 403                 set = false;
 404                 break;
 405         case '+':
 406                 set = true;
 407                 break;
 408         default:
 409                 set = true;
 410                 skiponce = true;
 411         }
 412
 413         /* Prepare reply string */
 414         strcpy(the_modes, set ? "+" : "-");
 415         the_args[0] = '\0';
 416
 417         x[1] = '\0';
 418         connected = CONNECTED;
 419         while (mode_ptr) {
 420                 if (!skiponce)
 421                         mode_ptr++;
 422                 if (!*mode_ptr) {
 423                         /* Try next argument if there's any */
 424                         if (arg_arg > mode_arg)
 425                                 mode_arg = arg_arg;
 426                         else
 427                                 mode_arg++;
 428
 429                         if (mode_arg >= Req->argc)
 430                                 break;
 431                         mode_ptr = Req->argv[mode_arg];
 432
 433                         if (Req->argc > mode_arg + 1)
 434                                 arg_arg = mode_arg + 1;
 435                         else
 436                                 arg_arg = -1;
 437                 }
 438                 skiponce = false;
 439
 440                 switch (*mode_ptr) {
 441                 case '+':
 442                 case '-':
 443                         if (((*mode_ptr == '+') && !set)
 444                             || ((*mode_ptr == '-') && set)) {
 445                                 /* Action modifier ("+"/"-") must be changed ... */
 446                                 len = strlen(the_modes) - 1;
 447                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 448                                         /* Adjust last action modifier in result */
 449                                         the_modes[len] = *mode_ptr;
 450                                 } else {
 451                                         /* Append modifier character to result string */
 452                                         x[0] = *mode_ptr;
 453                                         strlcat(the_modes, x, sizeof(the_modes));
 454                                 }
 455                                 set = *mode_ptr == '+';
 456                         }
 457                         continue;
 458                 }
 459
 460                 /* Are there arguments left? */
 461                 if (arg_arg >= Req->argc)
 462                         arg_arg = -1;
 463
 464                 /* Validate modes */
 465                 x[0] = '\0';
 466                 argadd[0] = '\0';
 467                 client = NULL;
 468                 switch (*mode_ptr) {
 469                 /* --- Channel modes --- */
 470                 case 'i': /* Invite only */
 471                 case 'm': /* Moderated */
 472                 case 'n': /* Only members can write */
 473                 case 's': /* Secret channel */
 474                 case 't': /* Topic locked */
 475                 case 'z': /* Secure connections only */
 476                         if (modeok)
 477                                 x[0] = *mode_ptr;
 478                         else
 479                                 connected = IRC_WriteStrClient(Origin,
 480                                         ERR_CHANOPRIVSNEEDED_MSG,
 481                                         Client_ID(Origin), Channel_Name(Channel));
 482                         break;
 483                 case 'k': /* Channel key */
 484                         if (!set) {
 485                                 if (modeok)
 486                                         x[0] = *mode_ptr;
 487                                 else
 488                                         connected = IRC_WriteStrClient(Origin,
 489                                                 ERR_CHANOPRIVSNEEDED_MSG,
 490                                                 Client_ID(Origin),
 491                                                 Channel_Name(Channel));
 492                                 break;
 493                         }
 494                         if (arg_arg > mode_arg) {
 495                                 if (modeok) {
 496                                         Channel_ModeDel(Channel, 'k');
 497                                         Channel_SetKey(Channel,
 498                                                        Req->argv[arg_arg]);
 499                                         strlcpy(argadd, Channel_Key(Channel),
 500                                                 sizeof(argadd));
 501                                         x[0] = *mode_ptr;
 502                                 } else {
 503                                         connected = IRC_WriteStrClient(Origin,
 504                                                 ERR_CHANOPRIVSNEEDED_MSG,
 505                                                 Client_ID(Origin),
 506                                                 Channel_Name(Channel));
 507                                 }
 508                                 Req->argv[arg_arg][0] = '\0';
 509                                 arg_arg++;
 510                         } else {
 511                                 connected = IRC_WriteStrClient(Origin,
 512                                         ERR_NEEDMOREPARAMS_MSG,
 513                                         Client_ID(Origin), Req->command);
 514                                 goto chan_exit;
 515                         }
 516                         break;
 517                 case 'l': /* Member limit */
 518                         if (!set) {
 519                                 if (modeok)
 520                                         x[0] = *mode_ptr;
 521                                 else
 522                                         connected = IRC_WriteStrClient(Origin,
 523                                                 ERR_CHANOPRIVSNEEDED_MSG,
 524                                                 Client_ID(Origin),
 525                                                 Channel_Name(Channel));
 526                                 break;
 527                         }
 528                         if (arg_arg > mode_arg) {
 529                                 if (modeok) {
 530                                         l = atol(Req->argv[arg_arg]);
 531                                         if (l > 0 && l < 0xFFFF) {
 532                                                 Channel_ModeDel(Channel, 'l');
 533                                                 Channel_SetMaxUsers(Channel, l);
 534                                                 snprintf(argadd, sizeof(argadd),
 535                                                          "%ld", l);
 536                                                 x[0] = *mode_ptr;
 537                                         }
 538                                 } else {
 539                                         connected = IRC_WriteStrClient(Origin,
 540                                                 ERR_CHANOPRIVSNEEDED_MSG,
 541                                                 Client_ID(Origin),
 542                                                 Channel_Name(Channel));
 543                                 }
 544                                 Req->argv[arg_arg][0] = '\0';
 545                                 arg_arg++;
 546                         } else {
 547                                 connected = IRC_WriteStrClient(Origin,
 548                                         ERR_NEEDMOREPARAMS_MSG,
 549                                         Client_ID(Origin), Req->command);
 550                                 goto chan_exit;
 551                         }
 552                         break;
 553                 case 'O': /* IRC operators only */
 554                         if (modeok) {
 555                                 /* Only IRC operators are allowed to
 556                                  * set the 'O' 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] = 'O';
 564                         } else
 565                                 connected = IRC_WriteStrClient(Origin,
 566                                                 ERR_CHANOPRIVSNEEDED_MSG,
 567                                                 Client_ID(Origin),
 568                                                 Channel_Name(Channel));
 569                                 break;
 570                 case 'P': /* Persistent channel */
 571                         if (modeok) {
 572                                 /* Only IRC operators are allowed to
 573                                  * set the 'P' channel mode! */
 574                                 if (set && !(Client_OperByMe(Client)
 575                                     || Client_Type(Client) == CLIENT_SERVER))
 576                                         connected = IRC_WriteStrClient(Origin,
 577                                                 ERR_NOPRIVILEGES_MSG,
 578                                                 Client_ID(Origin));
 579                                 else
 580                                         x[0] = 'P';
 581                         } else
 582                                 connected = IRC_WriteStrClient(Origin,
 583                                         ERR_CHANOPRIVSNEEDED_MSG,
 584                                         Client_ID(Origin),
 585                                         Channel_Name(Channel));
 586                         break;
 587                 /* --- Channel user modes --- */
 588                 case 'o': /* Channel operator */
 589                 case 'v': /* Voice */
 590                         if (arg_arg > mode_arg) {
 591                                 if (modeok) {
 592                                         client = Client_Search(Req->argv[arg_arg]);
 593                                         if (client)
 594                                                 x[0] = *mode_ptr;
 595                                         else
 596                                                 connected = IRC_WriteStrClient(Client,
 597                                                         ERR_NOSUCHNICK_MSG,
 598                                                         Client_ID(Client),
 599                                                         Req->argv[arg_arg]);
 600                                 } else {
 601                                         connected = IRC_WriteStrClient(Origin,
 602                                                 ERR_CHANOPRIVSNEEDED_MSG,
 603                                                 Client_ID(Origin),
 604                                                 Channel_Name(Channel));
 605                                 }
 606                                 Req->argv[arg_arg][0] = '\0';
 607                                 arg_arg++;
 608                         } else {
 609                                 connected = IRC_WriteStrClient(Origin,
 610                                         ERR_NEEDMOREPARAMS_MSG,
 611                                         Client_ID(Origin), Req->command);
 612                                 goto chan_exit;
 613                         }
 614                         break;
 615                 /* --- Channel lists --- */
 616                 case 'I': /* Invite lists */
 617                 case 'b': /* Ban lists */
 618                         if (arg_arg > mode_arg) {
 619                                 /* modify list */
 620                                 if (modeok) {
 621                                         connected = set
 622                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 623                                                 Client, Channel,
 624                                                 Req->argv[arg_arg])
 625                                            : Del_Ban_Invite(*mode_ptr, Origin,
 626                                                 Client, Channel,
 627                                                 Req->argv[arg_arg]);
 628                                 } else {
 629                                         connected = IRC_WriteStrClient(Origin,
 630                                                 ERR_CHANOPRIVSNEEDED_MSG,
 631                                                 Client_ID(Origin),
 632                                                 Channel_Name(Channel));
 633                                 }
 634                                 Req->argv[arg_arg][0] = '\0';
 635                                 arg_arg++;
 636                         } else {
 637                                 if (*mode_ptr == 'I')
 638                                         Channel_ShowInvites(Origin, Channel);
 639                                 else
 640                                         Channel_ShowBans(Origin, Channel);
 641                         }
 642                         break;
 643                 default:
 644                         Log(LOG_DEBUG,
 645                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 646                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 647                             Channel_Name(Channel));
 648                         if (Client_Type(Client) != CLIENT_SERVER)
 649                                 connected = IRC_WriteStrClient(Origin,
 650                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 651                                         Client_ID(Origin),
 652                                         set ? '+' : '-', *mode_ptr);
 653                         x[0] = '\0';
 654                         goto chan_exit;
 655                 }       /* switch() */
 656
 657                 if (!connected)
 658                         break;
 659
 660                 /* Is there a valid mode change? */
 661                 if (!x[0])
 662                         continue;
 663
 664                 /* Validate target client */
 665                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 666                         if (!IRC_WriteStrClient
 667                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 668                              Client_ID(Origin), Client_ID(client),
 669                              Channel_Name(Channel)))
 670                                 break;
 671
 672                         continue;
 673                 }
 674
 675                 if (client) {
 676                         /* Channel-User-Mode */
 677                         retval = set
 678                                ? Channel_UserModeAdd(Channel, client, x[0])
 679                                : Channel_UserModeDel(Channel, client, x[0]);
 680                         if (retval) {
 681                                 strlcat(the_args, " ", sizeof(the_args));
 682                                 strlcat(the_args, Client_ID(client),
 683                                         sizeof(the_args));
 684                                 strlcat(the_modes, x, sizeof(the_modes));
 685                                 LogDebug
 686                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 687                                      Client_Mask(client), Channel_Name(Channel),
 688                                      Channel_UserModes(Channel, client));
 689                         }
 690                 } else {
 691                         /* Channel-Mode */
 692                         retval = set
 693                                ? Channel_ModeAdd(Channel, x[0])
 694                                : Channel_ModeDel(Channel, x[0]);
 695                         if (retval) {
 696                                 strlcat(the_modes, x, sizeof(the_modes));
 697                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 698                                          Channel_Name(Channel),
 699                                          Channel_Modes(Channel));
 700                         }
 701                 }
 702
 703                 /* Are there additional arguments to add? */
 704                 if (argadd[0]) {
 705                         strlcat(the_args, " ", sizeof(the_args));
 706                         strlcat(the_args, argadd, sizeof(the_args));
 707                 }
 708         }
 709
 710       chan_exit:
 711         /* Are there changed modes? */
 712         if (the_modes[1]) {
 713                 /* Clean up mode string */
 714                 len = strlen(the_modes) - 1;
 715                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 716                         the_modes[len] = '\0';
 717
 718                 if (Client_Type(Client) == CLIENT_SERVER) {
 719                         /* MODE requests for local channels from other servers
 720                          * are definitely invalid! */
 721                         if (Channel_IsLocal(Channel)) {
 722                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 723                                 return CONNECTED;
 724                         }
 725
 726                         /* Forward mode changes to channel users and all the
 727                          * other remote servers: */
 728                         IRC_WriteStrServersPrefix(Client, Origin,
 729                                 "MODE %s %s%s", Channel_Name(Channel),
 730                                 the_modes, the_args);
 731                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 732                                 false, "MODE %s %s%s", Channel_Name(Channel),
 733                                 the_modes, the_args);
 734                 } else {
 735                         if (use_servermode)
 736                                 Origin = Client_ThisServer();
 737                         /* Send reply to client and inform other servers and channel users */
 738                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 739                                         "MODE %s %s%s", Channel_Name(Channel),
 740                                         the_modes, the_args);
 741                         /* Only forward requests for non-local channels */
 742                         if (!Channel_IsLocal(Channel))
 743                                 IRC_WriteStrServersPrefix(Client, Origin,
 744                                         "MODE %s %s%s", Channel_Name(Channel),
 745                                         the_modes, the_args);
 746                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 747                                 false, "MODE %s %s%s", Channel_Name(Channel),
 748                                 the_modes, the_args);
 749                 }
 750         }
 751
 752         IRC_SetPenalty(Client, 1);
 753         return connected;
 754 } /* Channel_Mode */
 755
 756
 757 GLOBAL bool
 758 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 759 {
 760         assert( Client != NULL );
 761         assert( Req != NULL );
 762
 763         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 764
 765         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 766         {
 767                 Client_SetAway( Client, Req->argv[0] );
 768                 Client_ModeAdd( Client, 'a' );
 769                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 770                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 771         }
 772         else
 773         {
 774                 Client_ModeDel( Client, 'a' );
 775                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 776                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 777         }
 778 } /* IRC_AWAY */
 779
 780
 781 static bool
 782 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 783 {
 784         const char *mask;
 785         bool already;
 786         bool ret;
 787
 788         assert( Client != NULL );
 789         assert( Channel != NULL );
 790         assert( Pattern != NULL );
 791         assert(what == 'I' || what == 'b');
 792
 793         mask = Lists_MakeMask(Pattern);
 794
 795         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 796         if (!already) {
 797                 if (what == 'I')
 798                         ret = Channel_AddInvite(Channel, mask, false);
 799                 else
 800                         ret = Channel_AddBan(Channel, mask);
 801                 if (!ret)
 802                         return CONNECTED;
 803         }
 804         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 805                 return CONNECTED;
 806
 807         if (what == 'I')
 808                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 809         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 810 }
 811
 812
 813 static bool
 814 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 815 {
 816         const char *mask;
 817         struct list_head *list;
 818
 819         assert( Client != NULL );
 820         assert( Channel != NULL );
 821         assert( Pattern != NULL );
 822         assert(what == 'I' || what == 'b');
 823
 824         mask = Lists_MakeMask( Pattern );
 825
 826         if (what == 'I')
 827                 list = Channel_GetListInvites(Channel);
 828         else
 829                 list = Channel_GetListBans(Channel);
 830
 831         Lists_Del(list, mask);
 832         if (what == 'I')
 833                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 834         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 835 }
 836
 837
 838 static bool
 839 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 840                 CHANNEL *Channel, const char *Mask)
 841 {
 842         bool ok;
 843
 844         if( Client_Type( Client ) == CLIENT_USER )
 845         {
 846                 /* send confirmation to client */
 847                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 848         }
 849         else ok = true;
 850
 851         /* to other servers */
 852         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 853
 854         /* and local users in channel */
 855         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 856
 857         return ok;
 858 } /* Send_ListChange */
 859
 860
 861 /* -eof- */