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                         } else {
 257                                 Log(LOG_DEBUG,
 258                                     "Handling unknown mode \"%c%c\" from \"%s\" for \"%s\" ...",
 259                                     set ? '+' : '-', *mode_ptr,
 260                                     Client_ID(Origin), Client_ID(Target));
 261                                 x[0] = *mode_ptr;
 262                         }
 263                 }
 264
 265                 if (!ok)
 266                         break;
 267
 268                 /* Is there a valid mode change? */
 269                 if (!x[0])
 270                         continue;
 271
 272                 if (set) {
 273                         if (Client_ModeAdd(Target, x[0]))
 274                                 strlcat(the_modes, x, sizeof(the_modes));
 275                 } else {
 276                         if (Client_ModeDel(Target, x[0]))
 277                                 strlcat(the_modes, x, sizeof(the_modes));
 278                 }
 279         }
 280
 281         /* Are there changed modes? */
 282         if (the_modes[1]) {
 283                 /* Remoce needless action modifier characters */
 284                 len = strlen(the_modes) - 1;
 285                 if (the_modes[len] == '+' || the_modes[len] == '-')
 286                         the_modes[len] = '\0';
 287
 288                 if (Client_Type(Client) == CLIENT_SERVER) {
 289                         /* Forward modes to other servers */
 290                         if (Client_Conn(Target) != NONE) {
 291                                 /* Remote server (service?) changed modes
 292                                  * for one of our clients. Inform it! */
 293                                 IRC_WriteStrClientPrefix(Target, Origin,
 294                                                          "MODE %s :%s",
 295                                                          Client_ID(Target),
 296                                                          the_modes);
 297                         }
 298                         IRC_WriteStrServersPrefix(Client, Origin,
 299                                                   "MODE %s :%s",
 300                                                   Client_ID(Target),
 301                                                   the_modes);
 302                 } else {
 303                         /* Send reply to client and inform other servers */
 304                         ok = IRC_WriteStrClientPrefix(Client, Origin,
 305                                                       "MODE %s :%s",
 306                                                       Client_ID(Target),
 307                                                       the_modes);
 308                         IRC_WriteStrServersPrefix(Client, Origin,
 309                                                   "MODE %s :%s",
 310                                                   Client_ID(Target),
 311                                                   the_modes);
 312                 }
 313                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 314                          Client_TypeText(Target), Client_Mask(Target),
 315                          Client_Modes(Target));
 316         }
 317
 318         IRC_SetPenalty(Client, 1);
 319         return ok;
 320 } /* Client_Mode */
 321
 322
 323 static bool
 324 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 325 {
 326         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 327         const char *mode_ptr;
 328
 329         /* Member or not? -- That's the question! */
 330         if (!Channel_IsMemberOf(Channel, Origin))
 331                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 332                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 333
 334         /* The sender is a member: generate extended reply */
 335         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 336         mode_ptr = the_modes;
 337         the_args[0] = '\0';
 338
 339         while(*mode_ptr) {
 340                 switch(*mode_ptr) {
 341                 case 'l':
 342                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 343                         strlcat(the_args, argadd, sizeof(the_args));
 344                         break;
 345                 case 'k':
 346                         strlcat(the_args, " ", sizeof(the_args));
 347                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 348                         break;
 349                 }
 350                 mode_ptr++;
 351         }
 352         if (the_args[0])
 353                 strlcat(the_modes, the_args, sizeof(the_modes));
 354
 355         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 356                                 Client_ID(Origin), Channel_Name(Channel),
 357                                 the_modes))
 358                 return DISCONNECTED;
 359 #ifndef STRICT_RFC
 360         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 361                                   Client_ID(Origin), Channel_Name(Channel),
 362                                   Channel_CreationTime(Channel)))
 363                 return DISCONNECTED;
 364 #endif
 365         return CONNECTED;
 366 }
 367
 368
 369 /**
 370  * Handle channel mode and channel-user mode changes
 371  */
 372 static bool
 373 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 374 {
 375         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 376             argadd[CLIENT_PASS_LEN], *mode_ptr;
 377         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 378         int mode_arg, arg_arg;
 379         CLIENT *client;
 380         long l;
 381         size_t len;
 382
 383         if (Channel_IsModeless(Channel))
 384                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 385                                 Client_ID(Client), Channel_Name(Channel));
 386
 387         /* Mode request: let's answer it :-) */
 388         if (Req->argc <= 1)
 389                 return Channel_Mode_Answer_Request(Origin, Channel);
 390
 391         Channel_CheckAdminRights(Channel, Client, Origin,
 392                                  &onchannel, &modeok, &use_servermode);
 393
 394         if (!onchannel && !modeok)
 395                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 396                                           Client_ID(Origin),
 397                                           Channel_Name(Channel));
 398
 399         mode_arg = 1;
 400         mode_ptr = Req->argv[mode_arg];
 401         if (Req->argc > mode_arg + 1)
 402                 arg_arg = mode_arg + 1;
 403         else
 404                 arg_arg = -1;
 405
 406         /* Initial state: set or unset modes? */
 407         skiponce = false;
 408         switch (*mode_ptr) {
 409         case '-':
 410                 set = false;
 411                 break;
 412         case '+':
 413                 set = true;
 414                 break;
 415         default:
 416                 set = true;
 417                 skiponce = true;
 418         }
 419
 420         /* Prepare reply string */
 421         strcpy(the_modes, set ? "+" : "-");
 422         the_args[0] = '\0';
 423
 424         x[1] = '\0';
 425         connected = CONNECTED;
 426         while (mode_ptr) {
 427                 if (!skiponce)
 428                         mode_ptr++;
 429                 if (!*mode_ptr) {
 430                         /* Try next argument if there's any */
 431                         if (arg_arg > mode_arg)
 432                                 mode_arg = arg_arg;
 433                         else
 434                                 mode_arg++;
 435
 436                         if (mode_arg >= Req->argc)
 437                                 break;
 438                         mode_ptr = Req->argv[mode_arg];
 439
 440                         if (Req->argc > mode_arg + 1)
 441                                 arg_arg = mode_arg + 1;
 442                         else
 443                                 arg_arg = -1;
 444                 }
 445                 skiponce = false;
 446
 447                 switch (*mode_ptr) {
 448                 case '+':
 449                 case '-':
 450                         if (((*mode_ptr == '+') && !set)
 451                             || ((*mode_ptr == '-') && set)) {
 452                                 /* Action modifier ("+"/"-") must be changed ... */
 453                                 len = strlen(the_modes) - 1;
 454                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 455                                         /* Adjust last action modifier in result */
 456                                         the_modes[len] = *mode_ptr;
 457                                 } else {
 458                                         /* Append modifier character to result string */
 459                                         x[0] = *mode_ptr;
 460                                         strlcat(the_modes, x, sizeof(the_modes));
 461                                 }
 462                                 set = *mode_ptr == '+';
 463                         }
 464                         continue;
 465                 }
 466
 467                 /* Are there arguments left? */
 468                 if (arg_arg >= Req->argc)
 469                         arg_arg = -1;
 470
 471                 /* Validate modes */
 472                 x[0] = '\0';
 473                 argadd[0] = '\0';
 474                 client = NULL;
 475                 switch (*mode_ptr) {
 476                 /* --- Channel modes --- */
 477                 case 'i': /* Invite only */
 478                 case 'm': /* Moderated */
 479                 case 'n': /* Only members can write */
 480                 case 'R': /* Registered users only */
 481                 case 's': /* Secret channel */
 482                 case 't': /* Topic locked */
 483                 case 'z': /* Secure connections only */
 484                         if (modeok)
 485                                 x[0] = *mode_ptr;
 486                         else
 487                                 connected = IRC_WriteStrClient(Origin,
 488                                         ERR_CHANOPRIVSNEEDED_MSG,
 489                                         Client_ID(Origin), Channel_Name(Channel));
 490                         break;
 491                 case 'k': /* Channel key */
 492                         if (!set) {
 493                                 if (modeok)
 494                                         x[0] = *mode_ptr;
 495                                 else
 496                                         connected = IRC_WriteStrClient(Origin,
 497                                                 ERR_CHANOPRIVSNEEDED_MSG,
 498                                                 Client_ID(Origin),
 499                                                 Channel_Name(Channel));
 500                                 break;
 501                         }
 502                         if (arg_arg > mode_arg) {
 503                                 if (modeok) {
 504                                         Channel_ModeDel(Channel, 'k');
 505                                         Channel_SetKey(Channel,
 506                                                        Req->argv[arg_arg]);
 507                                         strlcpy(argadd, Channel_Key(Channel),
 508                                                 sizeof(argadd));
 509                                         x[0] = *mode_ptr;
 510                                 } else {
 511                                         connected = IRC_WriteStrClient(Origin,
 512                                                 ERR_CHANOPRIVSNEEDED_MSG,
 513                                                 Client_ID(Origin),
 514                                                 Channel_Name(Channel));
 515                                 }
 516                                 Req->argv[arg_arg][0] = '\0';
 517                                 arg_arg++;
 518                         } else {
 519                                 connected = IRC_WriteStrClient(Origin,
 520                                         ERR_NEEDMOREPARAMS_MSG,
 521                                         Client_ID(Origin), Req->command);
 522                                 goto chan_exit;
 523                         }
 524                         break;
 525                 case 'l': /* Member limit */
 526                         if (!set) {
 527                                 if (modeok)
 528                                         x[0] = *mode_ptr;
 529                                 else
 530                                         connected = IRC_WriteStrClient(Origin,
 531                                                 ERR_CHANOPRIVSNEEDED_MSG,
 532                                                 Client_ID(Origin),
 533                                                 Channel_Name(Channel));
 534                                 break;
 535                         }
 536                         if (arg_arg > mode_arg) {
 537                                 if (modeok) {
 538                                         l = atol(Req->argv[arg_arg]);
 539                                         if (l > 0 && l < 0xFFFF) {
 540                                                 Channel_ModeDel(Channel, 'l');
 541                                                 Channel_SetMaxUsers(Channel, l);
 542                                                 snprintf(argadd, sizeof(argadd),
 543                                                          "%ld", l);
 544                                                 x[0] = *mode_ptr;
 545                                         }
 546                                 } else {
 547                                         connected = IRC_WriteStrClient(Origin,
 548                                                 ERR_CHANOPRIVSNEEDED_MSG,
 549                                                 Client_ID(Origin),
 550                                                 Channel_Name(Channel));
 551                                 }
 552                                 Req->argv[arg_arg][0] = '\0';
 553                                 arg_arg++;
 554                         } else {
 555                                 connected = IRC_WriteStrClient(Origin,
 556                                         ERR_NEEDMOREPARAMS_MSG,
 557                                         Client_ID(Origin), Req->command);
 558                                 goto chan_exit;
 559                         }
 560                         break;
 561                 case 'O': /* IRC operators only */
 562                         if (modeok) {
 563                                 /* Only IRC operators are allowed to
 564                                  * set the 'O' 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] = 'O';
 572                         } else
 573                                 connected = IRC_WriteStrClient(Origin,
 574                                                 ERR_CHANOPRIVSNEEDED_MSG,
 575                                                 Client_ID(Origin),
 576                                                 Channel_Name(Channel));
 577                                 break;
 578                 case 'P': /* Persistent channel */
 579                         if (modeok) {
 580                                 /* Only IRC operators are allowed to
 581                                  * set the 'P' channel mode! */
 582                                 if (set && !(Client_OperByMe(Client)
 583                                     || Client_Type(Client) == CLIENT_SERVER))
 584                                         connected = IRC_WriteStrClient(Origin,
 585                                                 ERR_NOPRIVILEGES_MSG,
 586                                                 Client_ID(Origin));
 587                                 else
 588                                         x[0] = 'P';
 589                         } else
 590                                 connected = IRC_WriteStrClient(Origin,
 591                                         ERR_CHANOPRIVSNEEDED_MSG,
 592                                         Client_ID(Origin),
 593                                         Channel_Name(Channel));
 594                         break;
 595                 /* --- Channel user modes --- */
 596                 case 'a':
 597                 case 'h':
 598                 case 'q':
 599                         if (Client_Type(Client) != CLIENT_SERVER) {
 600                                 connected = IRC_WriteStrClient(Origin,
 601                                         ERR_CHANOPRIVSNEEDED_MSG,
 602                                         Client_ID(Origin),
 603                                         Channel_Name(Channel));
 604                                 goto chan_exit;
 605                         }
 606                 case 'o': /* Channel operator */
 607                 case 'v': /* Voice */
 608                         if (arg_arg > mode_arg) {
 609                                 if (modeok) {
 610                                         client = Client_Search(Req->argv[arg_arg]);
 611                                         if (client)
 612                                                 x[0] = *mode_ptr;
 613                                         else
 614                                                 connected = IRC_WriteStrClient(Client,
 615                                                         ERR_NOSUCHNICK_MSG,
 616                                                         Client_ID(Client),
 617                                                         Req->argv[arg_arg]);
 618                                 } else {
 619                                         connected = IRC_WriteStrClient(Origin,
 620                                                 ERR_CHANOPRIVSNEEDED_MSG,
 621                                                 Client_ID(Origin),
 622                                                 Channel_Name(Channel));
 623                                 }
 624                                 Req->argv[arg_arg][0] = '\0';
 625                                 arg_arg++;
 626                         } else {
 627                                 connected = IRC_WriteStrClient(Origin,
 628                                         ERR_NEEDMOREPARAMS_MSG,
 629                                         Client_ID(Origin), Req->command);
 630                                 goto chan_exit;
 631                         }
 632                         break;
 633                 /* --- Channel lists --- */
 634                 case 'I': /* Invite lists */
 635                 case 'b': /* Ban lists */
 636                         if (arg_arg > mode_arg) {
 637                                 /* modify list */
 638                                 if (modeok) {
 639                                         connected = set
 640                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 641                                                 Client, Channel,
 642                                                 Req->argv[arg_arg])
 643                                            : Del_Ban_Invite(*mode_ptr, Origin,
 644                                                 Client, Channel,
 645                                                 Req->argv[arg_arg]);
 646                                 } else {
 647                                         connected = IRC_WriteStrClient(Origin,
 648                                                 ERR_CHANOPRIVSNEEDED_MSG,
 649                                                 Client_ID(Origin),
 650                                                 Channel_Name(Channel));
 651                                 }
 652                                 Req->argv[arg_arg][0] = '\0';
 653                                 arg_arg++;
 654                         } else {
 655                                 if (*mode_ptr == 'I')
 656                                         Channel_ShowInvites(Origin, Channel);
 657                                 else
 658                                         Channel_ShowBans(Origin, Channel);
 659                         }
 660                         break;
 661                 default:
 662                         if (Client_Type(Client) != CLIENT_SERVER) {
 663                                 Log(LOG_DEBUG,
 664                                     "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 665                                     set ? '+' : '-', *mode_ptr,
 666                                     Client_ID(Origin), Channel_Name(Channel));
 667                                 connected = IRC_WriteStrClient(Origin,
 668                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 669                                         Client_ID(Origin),
 670                                         set ? '+' : '-', *mode_ptr);
 671                                 x[0] = '\0';
 672                         } else {
 673                                 Log(LOG_DEBUG,
 674                                     "Handling unknown mode \"%c%c\" from \"%s\" on %s ...",
 675                                     set ? '+' : '-', *mode_ptr,
 676                                     Client_ID(Origin), Channel_Name(Channel));
 677                                 x[0] = *mode_ptr;
 678                         }
 679                 }
 680
 681                 if (!connected)
 682                         break;
 683
 684                 /* Is there a valid mode change? */
 685                 if (!x[0])
 686                         continue;
 687
 688                 /* Validate target client */
 689                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 690                         if (!IRC_WriteStrClient
 691                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 692                              Client_ID(Origin), Client_ID(client),
 693                              Channel_Name(Channel)))
 694                                 break;
 695
 696                         continue;
 697                 }
 698
 699                 if (client) {
 700                         /* Channel-User-Mode */
 701                         retval = set
 702                                ? Channel_UserModeAdd(Channel, client, x[0])
 703                                : Channel_UserModeDel(Channel, client, x[0]);
 704                         if (retval) {
 705                                 strlcat(the_args, " ", sizeof(the_args));
 706                                 strlcat(the_args, Client_ID(client),
 707                                         sizeof(the_args));
 708                                 strlcat(the_modes, x, sizeof(the_modes));
 709                                 LogDebug
 710                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 711                                      Client_Mask(client), Channel_Name(Channel),
 712                                      Channel_UserModes(Channel, client));
 713                         }
 714                 } else {
 715                         /* Channel-Mode */
 716                         retval = set
 717                                ? Channel_ModeAdd(Channel, x[0])
 718                                : Channel_ModeDel(Channel, x[0]);
 719                         if (retval) {
 720                                 strlcat(the_modes, x, sizeof(the_modes));
 721                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 722                                          Channel_Name(Channel),
 723                                          Channel_Modes(Channel));
 724                         }
 725                 }
 726
 727                 /* Are there additional arguments to add? */
 728                 if (argadd[0]) {
 729                         strlcat(the_args, " ", sizeof(the_args));
 730                         strlcat(the_args, argadd, sizeof(the_args));
 731                 }
 732         }
 733
 734       chan_exit:
 735         /* Are there changed modes? */
 736         if (the_modes[1]) {
 737                 /* Clean up mode string */
 738                 len = strlen(the_modes) - 1;
 739                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 740                         the_modes[len] = '\0';
 741
 742                 if (Client_Type(Client) == CLIENT_SERVER) {
 743                         /* MODE requests for local channels from other servers
 744                          * are definitely invalid! */
 745                         if (Channel_IsLocal(Channel)) {
 746                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 747                                 return CONNECTED;
 748                         }
 749
 750                         /* Forward mode changes to channel users and all the
 751                          * other remote servers: */
 752                         IRC_WriteStrServersPrefix(Client, Origin,
 753                                 "MODE %s %s%s", Channel_Name(Channel),
 754                                 the_modes, the_args);
 755                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 756                                 false, "MODE %s %s%s", Channel_Name(Channel),
 757                                 the_modes, the_args);
 758                 } else {
 759                         if (use_servermode)
 760                                 Origin = Client_ThisServer();
 761                         /* Send reply to client and inform other servers and channel users */
 762                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 763                                         "MODE %s %s%s", Channel_Name(Channel),
 764                                         the_modes, the_args);
 765                         /* Only forward requests for non-local channels */
 766                         if (!Channel_IsLocal(Channel))
 767                                 IRC_WriteStrServersPrefix(Client, Origin,
 768                                         "MODE %s %s%s", Channel_Name(Channel),
 769                                         the_modes, the_args);
 770                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 771                                 false, "MODE %s %s%s", Channel_Name(Channel),
 772                                 the_modes, the_args);
 773                 }
 774         }
 775
 776         IRC_SetPenalty(Client, 1);
 777         return connected;
 778 } /* Channel_Mode */
 779
 780
 781 GLOBAL bool
 782 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 783 {
 784         assert( Client != NULL );
 785         assert( Req != NULL );
 786
 787         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 788
 789         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 790         {
 791                 Client_SetAway( Client, Req->argv[0] );
 792                 Client_ModeAdd( Client, 'a' );
 793                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 794                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 795         }
 796         else
 797         {
 798                 Client_ModeDel( Client, 'a' );
 799                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 800                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 801         }
 802 } /* IRC_AWAY */
 803
 804
 805 static bool
 806 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 807 {
 808         const char *mask;
 809         bool already;
 810         bool ret;
 811
 812         assert( Client != NULL );
 813         assert( Channel != NULL );
 814         assert( Pattern != NULL );
 815         assert(what == 'I' || what == 'b');
 816
 817         mask = Lists_MakeMask(Pattern);
 818
 819         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 820         if (!already) {
 821                 if (what == 'I')
 822                         ret = Channel_AddInvite(Channel, mask, false);
 823                 else
 824                         ret = Channel_AddBan(Channel, mask);
 825                 if (!ret)
 826                         return CONNECTED;
 827         }
 828         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 829                 return CONNECTED;
 830
 831         if (what == 'I')
 832                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 833         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 834 }
 835
 836
 837 static bool
 838 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 839 {
 840         const char *mask;
 841         struct list_head *list;
 842
 843         assert( Client != NULL );
 844         assert( Channel != NULL );
 845         assert( Pattern != NULL );
 846         assert(what == 'I' || what == 'b');
 847
 848         mask = Lists_MakeMask( Pattern );
 849
 850         if (what == 'I')
 851                 list = Channel_GetListInvites(Channel);
 852         else
 853                 list = Channel_GetListBans(Channel);
 854
 855         Lists_Del(list, mask);
 856         if (what == 'I')
 857                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 858         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 859 }
 860
 861
 862 static bool
 863 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 864                 CHANNEL *Channel, const char *Mask)
 865 {
 866         bool ok;
 867
 868         if( Client_Type( Client ) == CLIENT_USER )
 869         {
 870                 /* send confirmation to client */
 871                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 872         }
 873         else ok = true;
 874
 875         /* to other servers */
 876         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 877
 878         /* and local users in channel */
 879         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 880
 881         return ok;
 882 } /* Send_ListChange */
 883
 884
 885 /* -eof- */