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
  13 #include "portab.h"
  14
  15 /**
  16  * @file
  17  * IRC commands for mode changes (like MODE, AWAY, etc.)
  18  */
  19
  20 #include "imp.h"
  21 #include <assert.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "defines.h"
  27 #include "conn.h"
  28 #include "channel.h"
  29 #include "irc-write.h"
  30 #include "lists.h"
  31 #include "log.h"
  32 #include "parse.h"
  33 #include "messages.h"
  34 #include "conf.h"
  35
  36 #include "exp.h"
  37 #include "irc-mode.h"
  38
  39
  40 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  41         CLIENT *Target ));
  42 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
  43         CHANNEL *Channel ));
  44
  45 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  46         CHANNEL *Channel, const char *Pattern));
  47 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
  48         CHANNEL *Channel, const char *Pattern));
  49
  50 static bool Send_ListChange PARAMS((const char *Mode, CLIENT *Prefix,
  51         CLIENT *Client, CHANNEL *Channel, const char *Mask));
  52
  53
  54 GLOBAL bool
  55 IRC_MODE( CLIENT *Client, REQUEST *Req )
  56 {
  57         CLIENT *cl, *origin;
  58         CHANNEL *chan;
  59
  60         assert( Client != NULL );
  61         assert( Req != NULL );
  62
  63         /* No parameters? */
  64         if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  65
  66         /* Origin for answers */
  67         if( Client_Type( Client ) == CLIENT_SERVER )
  68         {
  69                 origin = Client_Search( Req->prefix );
  70                 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
  71         }
  72         else origin = Client;
  73
  74         /* Channel or user mode? */
  75         cl = NULL; chan = NULL;
  76         if (Client_IsValidNick(Req->argv[0]))
  77                 cl = Client_Search(Req->argv[0]);
  78         if (Channel_IsValidName(Req->argv[0]))
  79                 chan = Channel_Search(Req->argv[0]);
  80
  81         if (cl)
  82                 return Client_Mode(Client, Req, origin, cl);
  83         if (chan)
  84                 return Channel_Mode(Client, Req, origin, chan);
  85
  86         /* No target found! */
  87         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
  88                         Client_ID(Client), Req->argv[0]);
  89 } /* IRC_MODE */
  90
  91
  92 static bool
  93 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
  94 {
  95         /* Handle client mode requests */
  96
  97         char the_modes[COMMAND_LEN], x[2], *mode_ptr;
  98         bool ok, set;
  99         int mode_arg;
 100         size_t len;
 101
 102         /* Is the client allowed to request or change the modes? */
 103         if( Client_Type( Client ) == CLIENT_USER )
 104         {
 105                 /* Users are only allowed to manipulate their own modes! */
 106                 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
 107         }
 108
 109         /* Mode request: let's answer it :-) */
 110         if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
 111
 112         mode_arg = 1;
 113         mode_ptr = Req->argv[mode_arg];
 114
 115         /* Initial state: set or unset modes? */
 116         if( *mode_ptr == '+' ) set = true;
 117         else if( *mode_ptr == '-' ) set = false;
 118         else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
 119
 120         /* Prepare reply string */
 121         if( set ) strcpy( the_modes, "+" );
 122         else strcpy( the_modes, "-" );
 123
 124         x[1] = '\0';
 125         ok = CONNECTED;
 126         while( mode_ptr )
 127         {
 128                 mode_ptr++;
 129                 if( ! *mode_ptr )
 130                 {
 131                         /* Try next argument if there's any */
 132                         mode_arg++;
 133                         if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
 134                         else break;
 135                 }
 136
 137                 switch( *mode_ptr )
 138                 {
 139                         case '+':
 140                         case '-':
 141                                 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
 142                                 {
 143                                         /* Action modifier ("+"/"-") must be changed ... */
 144                                         len = strlen( the_modes ) - 1;
 145                                         if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
 146                                         {
 147                                                 /* Adjust last action modifier in result */
 148                                                 the_modes[len] = *mode_ptr;
 149                                         }
 150                                         else
 151                                         {
 152                                                 /* Append modifier character to result string */
 153                                                 x[0] = *mode_ptr;
 154                                                 strlcat( the_modes, x, sizeof( the_modes ));
 155                                         }
 156                                         if( *mode_ptr == '+' ) set = true;
 157                                         else set = false;
 158                                 }
 159                                 continue;
 160                 }
 161
 162                 /* Validate modes */
 163                 x[0] = '\0';
 164                 switch( *mode_ptr )
 165                 {
 166                         case 'i': /* Invisible */
 167                         case 's': /* Server messages */
 168                         case 'w': /* Wallops messages */
 169                                 x[0] = *mode_ptr;
 170                                 break;
 171
 172                         case 'a': /* Away */
 173                                 if( Client_Type( Client ) == CLIENT_SERVER )
 174                                 {
 175                                         x[0] = 'a';
 176                                         Client_SetAway( Origin, DEFAULT_AWAY_MSG );
 177                                 }
 178                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 179                                 break;
 180
 181                         case 'c': /* Receive connect notices
 182                                    * (only settable by IRC operators!) */
 183                                 if(!set || Client_OperByMe(Origin)
 184                                    || Client_Type(Client) == CLIENT_SERVER)
 185                                         x[0] = 'c';
 186                                 else
 187                                         ok = IRC_WriteStrClient(Origin,
 188                                                         ERR_NOPRIVILEGES_MSG,
 189                                                         Client_ID(Origin));
 190                                 break;
 191
 192                         case 'o': /* IRC operator (only unsettable!) */
 193                                 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
 194                                 {
 195                                         Client_SetOperByMe( Target, false );
 196                                         x[0] = 'o';
 197                                 }
 198                                 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
 199                                 break;
 200
 201                         case 'r': /* Restricted (only settable) */
 202                                 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
 203                                 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
 204                                 break;
 205
 206                         case 'x': /* Cloak hostname */
 207                                 if (Client_HasMode(Client, 'r'))
 208                                         IRC_WriteStrClient(Origin,
 209                                                            ERR_RESTRICTED_MSG,
 210                                                            Client_ID(Origin));
 211                                 else
 212                                         x[0] = 'x';
 213                                 break;
 214
 215                         default:
 216                                 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
 217                                 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
 218                                 x[0] = '\0';
 219                                 goto client_exit;
 220                 }
 221                 if( ! ok ) break;
 222
 223                 /* Is there a valid mode change? */
 224                 if( ! x[0] ) continue;
 225
 226                 if( set )
 227                 {
 228                         /* Set mode */
 229                         if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 230
 231                 }
 232                 else
 233                 {
 234                         /* Unset mode */
 235                         if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
 236                 }
 237         }
 238 client_exit:
 239
 240         /* Are there changed modes? */
 241         if( the_modes[1] )
 242         {
 243                 /* Remoce needless action modifier characters */
 244                 len = strlen( the_modes ) - 1;
 245                 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
 246
 247                 if( Client_Type( Client ) == CLIENT_SERVER )
 248                 {
 249                         /* Forward modes to other servers */
 250                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 251                 }
 252                 else
 253                 {
 254                         /* Send reply to client and inform other servers */
 255                         ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 256                         IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
 257                 }
 258                 LogDebug("%s \"%s\": Mode change, now \"%s\".",
 259                          Client_TypeText(Target), Client_Mask(Target),
 260                          Client_Modes(Target));
 261         }
 262
 263         IRC_SetPenalty( Client, 1 );
 264         return ok;
 265 } /* Client_Mode */
 266
 267
 268 static bool
 269 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 270 {
 271         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
 272         const char *mode_ptr;
 273
 274         /* Member or not? -- That's the question! */
 275         if (!Channel_IsMemberOf(Channel, Origin))
 276                 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 277                         Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
 278
 279         /* The sender is a member: generate extended reply */
 280         strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
 281         mode_ptr = the_modes;
 282         the_args[0] = '\0';
 283
 284         while(*mode_ptr) {
 285                 switch(*mode_ptr) {
 286                 case 'l':
 287                         snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
 288                         strlcat(the_args, argadd, sizeof(the_args));
 289                         break;
 290                 case 'k':
 291                         strlcat(the_args, " ", sizeof(the_args));
 292                         strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
 293                         break;
 294                 }
 295                 mode_ptr++;
 296         }
 297         if (the_args[0])
 298                 strlcat(the_modes, the_args, sizeof(the_modes));
 299
 300         if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
 301                                 Client_ID(Origin), Channel_Name(Channel),
 302                                 the_modes))
 303                 return DISCONNECTED;
 304 #ifndef STRICT_RFC
 305         if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
 306                                   Client_ID(Origin), Channel_Name(Channel),
 307                                   Channel_CreationTime(Channel)))
 308                 return DISCONNECTED;
 309 #endif
 310         return CONNECTED;
 311 }
 312
 313
 314 /**
 315  * Handle channel mode and channel-user mode changes
 316  */
 317 static bool
 318 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 319 {
 320         char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
 321             argadd[CLIENT_PASS_LEN], *mode_ptr;
 322         bool connected, set, skiponce, retval, onchannel, modeok, use_servermode;
 323         int mode_arg, arg_arg;
 324         CLIENT *client;
 325         long l;
 326         size_t len;
 327
 328         if (Channel_IsModeless(Channel))
 329                 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
 330                                 Client_ID(Client), Channel_Name(Channel));
 331
 332         /* Mode request: let's answer it :-) */
 333         if (Req->argc <= 1)
 334                 return Channel_Mode_Answer_Request(Origin, Channel);
 335
 336         Channel_CheckAdminRights(Channel, Client, Origin,
 337                                  &onchannel, &modeok, &use_servermode);
 338
 339         if (!onchannel && !modeok)
 340                 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
 341                                           Client_ID(Origin),
 342                                           Channel_Name(Channel));
 343
 344         mode_arg = 1;
 345         mode_ptr = Req->argv[mode_arg];
 346         if (Req->argc > mode_arg + 1)
 347                 arg_arg = mode_arg + 1;
 348         else
 349                 arg_arg = -1;
 350
 351         /* Initial state: set or unset modes? */
 352         skiponce = false;
 353         switch (*mode_ptr) {
 354         case '-':
 355                 set = false;
 356                 break;
 357         case '+':
 358                 set = true;
 359                 break;
 360         default:
 361                 set = true;
 362                 skiponce = true;
 363         }
 364
 365         /* Prepare reply string */
 366         strcpy(the_modes, set ? "+" : "-");
 367         the_args[0] = '\0';
 368
 369         x[1] = '\0';
 370         connected = CONNECTED;
 371         while (mode_ptr) {
 372                 if (!skiponce)
 373                         mode_ptr++;
 374                 if (!*mode_ptr) {
 375                         /* Try next argument if there's any */
 376                         if (arg_arg > mode_arg)
 377                                 mode_arg = arg_arg;
 378                         else
 379                                 mode_arg++;
 380
 381                         if (mode_arg >= Req->argc)
 382                                 break;
 383                         mode_ptr = Req->argv[mode_arg];
 384
 385                         if (Req->argc > mode_arg + 1)
 386                                 arg_arg = mode_arg + 1;
 387                         else
 388                                 arg_arg = -1;
 389                 }
 390                 skiponce = false;
 391
 392                 switch (*mode_ptr) {
 393                 case '+':
 394                 case '-':
 395                         if (((*mode_ptr == '+') && !set)
 396                             || ((*mode_ptr == '-') && set)) {
 397                                 /* Action modifier ("+"/"-") must be changed ... */
 398                                 len = strlen(the_modes) - 1;
 399                                 if (the_modes[len] == '+' || the_modes[len] == '-') {
 400                                         /* Adjust last action modifier in result */
 401                                         the_modes[len] = *mode_ptr;
 402                                 } else {
 403                                         /* Append modifier character to result string */
 404                                         x[0] = *mode_ptr;
 405                                         strlcat(the_modes, x, sizeof(the_modes));
 406                                 }
 407                                 set = *mode_ptr == '+';
 408                         }
 409                         continue;
 410                 }
 411
 412                 /* Are there arguments left? */
 413                 if (arg_arg >= Req->argc)
 414                         arg_arg = -1;
 415
 416                 /* Validate modes */
 417                 x[0] = '\0';
 418                 argadd[0] = '\0';
 419                 client = NULL;
 420                 switch (*mode_ptr) {
 421                 /* --- Channel modes --- */
 422                 case 'i': /* Invite only */
 423                 case 'm': /* Moderated */
 424                 case 'n': /* Only members can write */
 425                 case 's': /* Secret channel */
 426                 case 't': /* Topic locked */
 427                 case 'z': /* Secure connections only */
 428                         if (modeok)
 429                                 x[0] = *mode_ptr;
 430                         else
 431                                 connected = IRC_WriteStrClient(Origin,
 432                                         ERR_CHANOPRIVSNEEDED_MSG,
 433                                         Client_ID(Origin), Channel_Name(Channel));
 434                         break;
 435                 case 'k': /* Channel key */
 436                         if (!set) {
 437                                 if (modeok)
 438                                         x[0] = *mode_ptr;
 439                                 else
 440                                         connected = IRC_WriteStrClient(Origin,
 441                                                 ERR_CHANOPRIVSNEEDED_MSG,
 442                                                 Client_ID(Origin),
 443                                                 Channel_Name(Channel));
 444                                 break;
 445                         }
 446                         if (arg_arg > mode_arg) {
 447                                 if (modeok) {
 448                                         Channel_ModeDel(Channel, 'k');
 449                                         Channel_SetKey(Channel,
 450                                                        Req->argv[arg_arg]);
 451                                         strlcpy(argadd, Channel_Key(Channel),
 452                                                 sizeof(argadd));
 453                                         x[0] = *mode_ptr;
 454                                 } else {
 455                                         connected = IRC_WriteStrClient(Origin,
 456                                                 ERR_CHANOPRIVSNEEDED_MSG,
 457                                                 Client_ID(Origin),
 458                                                 Channel_Name(Channel));
 459                                 }
 460                                 Req->argv[arg_arg][0] = '\0';
 461                                 arg_arg++;
 462                         } else {
 463                                 connected = IRC_WriteStrClient(Origin,
 464                                         ERR_NEEDMOREPARAMS_MSG,
 465                                         Client_ID(Origin), Req->command);
 466                                 goto chan_exit;
 467                         }
 468                         break;
 469                 case 'l': /* Member limit */
 470                         if (!set) {
 471                                 if (modeok)
 472                                         x[0] = *mode_ptr;
 473                                 else
 474                                         connected = IRC_WriteStrClient(Origin,
 475                                                 ERR_CHANOPRIVSNEEDED_MSG,
 476                                                 Client_ID(Origin),
 477                                                 Channel_Name(Channel));
 478                                 break;
 479                         }
 480                         if (arg_arg > mode_arg) {
 481                                 if (modeok) {
 482                                         l = atol(Req->argv[arg_arg]);
 483                                         if (l > 0 && l < 0xFFFF) {
 484                                                 Channel_ModeDel(Channel, 'l');
 485                                                 Channel_SetMaxUsers(Channel, l);
 486                                                 snprintf(argadd, sizeof(argadd),
 487                                                          "%ld", l);
 488                                                 x[0] = *mode_ptr;
 489                                         }
 490                                 } else {
 491                                         connected = IRC_WriteStrClient(Origin,
 492                                                 ERR_CHANOPRIVSNEEDED_MSG,
 493                                                 Client_ID(Origin),
 494                                                 Channel_Name(Channel));
 495                                 }
 496                                 Req->argv[arg_arg][0] = '\0';
 497                                 arg_arg++;
 498                         } else {
 499                                 connected = IRC_WriteStrClient(Origin,
 500                                         ERR_NEEDMOREPARAMS_MSG,
 501                                         Client_ID(Origin), Req->command);
 502                                 goto chan_exit;
 503                         }
 504                         break;
 505                 case 'O': /* IRC operators only */
 506                         if (modeok) {
 507                                 /* Only IRC operators are allowed to
 508                                  * set the 'O' channel mode! */
 509                                 if (set && !(Client_OperByMe(Client)
 510                                     || Client_Type(Client) == CLIENT_SERVER))
 511                                         connected = IRC_WriteStrClient(Origin,
 512                                                 ERR_NOPRIVILEGES_MSG,
 513                                                 Client_ID(Origin));
 514                                 else
 515                                         x[0] = 'O';
 516                         } else
 517                                 connected = IRC_WriteStrClient(Origin,
 518                                                 ERR_CHANOPRIVSNEEDED_MSG,
 519                                                 Client_ID(Origin),
 520                                                 Channel_Name(Channel));
 521                                 break;
 522                 case 'P': /* Persistent channel */
 523                         if (modeok) {
 524                                 /* Only IRC operators are allowed to
 525                                  * set the 'P' channel mode! */
 526                                 if (set && !(Client_OperByMe(Client)
 527                                     || Client_Type(Client) == CLIENT_SERVER))
 528                                         connected = IRC_WriteStrClient(Origin,
 529                                                 ERR_NOPRIVILEGES_MSG,
 530                                                 Client_ID(Origin));
 531                                 else
 532                                         x[0] = 'P';
 533                         } else
 534                                 connected = IRC_WriteStrClient(Origin,
 535                                         ERR_CHANOPRIVSNEEDED_MSG,
 536                                         Client_ID(Origin),
 537                                         Channel_Name(Channel));
 538                         break;
 539                 /* --- Channel user modes --- */
 540                 case 'o': /* Channel operator */
 541                 case 'v': /* Voice */
 542                         if (arg_arg > mode_arg) {
 543                                 if (modeok) {
 544                                         client = Client_Search(Req->argv[arg_arg]);
 545                                         if (client)
 546                                                 x[0] = *mode_ptr;
 547                                         else
 548                                                 connected = IRC_WriteStrClient(Client,
 549                                                         ERR_NOSUCHNICK_MSG,
 550                                                         Client_ID(Client),
 551                                                         Req->argv[arg_arg]);
 552                                 } else {
 553                                         connected = IRC_WriteStrClient(Origin,
 554                                                 ERR_CHANOPRIVSNEEDED_MSG,
 555                                                 Client_ID(Origin),
 556                                                 Channel_Name(Channel));
 557                                 }
 558                                 Req->argv[arg_arg][0] = '\0';
 559                                 arg_arg++;
 560                         } else {
 561                                 connected = IRC_WriteStrClient(Origin,
 562                                         ERR_NEEDMOREPARAMS_MSG,
 563                                         Client_ID(Origin), Req->command);
 564                                 goto chan_exit;
 565                         }
 566                         break;
 567                 /* --- Channel lists --- */
 568                 case 'I': /* Invite lists */
 569                 case 'b': /* Ban lists */
 570                         if (arg_arg > mode_arg) {
 571                                 /* modify list */
 572                                 if (modeok) {
 573                                         connected = set
 574                                            ? Add_Ban_Invite(*mode_ptr, Origin,
 575                                                 Client, Channel,
 576                                                 Req->argv[arg_arg])
 577                                            : Del_Ban_Invite(*mode_ptr, Origin,
 578                                                 Client, Channel,
 579                                                 Req->argv[arg_arg]);
 580                                 } else {
 581                                         connected = IRC_WriteStrClient(Origin,
 582                                                 ERR_CHANOPRIVSNEEDED_MSG,
 583                                                 Client_ID(Origin),
 584                                                 Channel_Name(Channel));
 585                                 }
 586                                 Req->argv[arg_arg][0] = '\0';
 587                                 arg_arg++;
 588                         } else {
 589                                 if (*mode_ptr == 'I')
 590                                         Channel_ShowInvites(Origin, Channel);
 591                                 else
 592                                         Channel_ShowBans(Origin, Channel);
 593                         }
 594                         break;
 595                 default:
 596                         Log(LOG_DEBUG,
 597                             "Unknown mode \"%c%c\" from \"%s\" on %s!?",
 598                             set ? '+' : '-', *mode_ptr, Client_ID(Origin),
 599                             Channel_Name(Channel));
 600                         if (Client_Type(Client) != CLIENT_SERVER)
 601                                 connected = IRC_WriteStrClient(Origin,
 602                                         ERR_UMODEUNKNOWNFLAG2_MSG,
 603                                         Client_ID(Origin),
 604                                         set ? '+' : '-', *mode_ptr);
 605                         x[0] = '\0';
 606                         goto chan_exit;
 607                 }       /* switch() */
 608
 609                 if (!connected)
 610                         break;
 611
 612                 /* Is there a valid mode change? */
 613                 if (!x[0])
 614                         continue;
 615
 616                 /* Validate target client */
 617                 if (client && (!Channel_IsMemberOf(Channel, client))) {
 618                         if (!IRC_WriteStrClient
 619                             (Origin, ERR_USERNOTINCHANNEL_MSG,
 620                              Client_ID(Origin), Client_ID(client),
 621                              Channel_Name(Channel)))
 622                                 break;
 623
 624                         continue;
 625                 }
 626
 627                 if (client) {
 628                         /* Channel-User-Mode */
 629                         retval = set
 630                                ? Channel_UserModeAdd(Channel, client, x[0])
 631                                : Channel_UserModeDel(Channel, client, x[0]);
 632                         if (retval) {
 633                                 strlcat(the_args, " ", sizeof(the_args));
 634                                 strlcat(the_args, Client_ID(client),
 635                                         sizeof(the_args));
 636                                 strlcat(the_modes, x, sizeof(the_modes));
 637                                 LogDebug
 638                                     ("User \"%s\": Mode change on %s, now \"%s\"",
 639                                      Client_Mask(client), Channel_Name(Channel),
 640                                      Channel_UserModes(Channel, client));
 641                         }
 642                 } else {
 643                         /* Channel-Mode */
 644                         retval = set
 645                                ? Channel_ModeAdd(Channel, x[0])
 646                                : Channel_ModeDel(Channel, x[0]);
 647                         if (retval) {
 648                                 strlcat(the_modes, x, sizeof(the_modes));
 649                                 LogDebug("Channel %s: Mode change, now \"%s\".",
 650                                          Channel_Name(Channel),
 651                                          Channel_Modes(Channel));
 652                         }
 653                 }
 654
 655                 /* Are there additional arguments to add? */
 656                 if (argadd[0]) {
 657                         strlcat(the_args, " ", sizeof(the_args));
 658                         strlcat(the_args, argadd, sizeof(the_args));
 659                 }
 660         }
 661
 662       chan_exit:
 663         /* Are there changed modes? */
 664         if (the_modes[1]) {
 665                 /* Clean up mode string */
 666                 len = strlen(the_modes) - 1;
 667                 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
 668                         the_modes[len] = '\0';
 669
 670                 if (Client_Type(Client) == CLIENT_SERVER) {
 671                         /* MODE requests for local channels from other servers
 672                          * are definitely invalid! */
 673                         if (Channel_IsLocal(Channel)) {
 674                                 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
 675                                 return CONNECTED;
 676                         }
 677
 678                         /* Forward mode changes to channel users and all the
 679                          * other remote servers: */
 680                         IRC_WriteStrServersPrefix(Client, Origin,
 681                                 "MODE %s %s%s", Channel_Name(Channel),
 682                                 the_modes, the_args);
 683                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 684                                 false, "MODE %s %s%s", Channel_Name(Channel),
 685                                 the_modes, the_args);
 686                 } else {
 687                         if (use_servermode)
 688                                 Origin = Client_ThisServer();
 689                         /* Send reply to client and inform other servers and channel users */
 690                         connected = IRC_WriteStrClientPrefix(Client, Origin,
 691                                         "MODE %s %s%s", Channel_Name(Channel),
 692                                         the_modes, the_args);
 693                         /* Only forward requests for non-local channels */
 694                         if (!Channel_IsLocal(Channel))
 695                                 IRC_WriteStrServersPrefix(Client, Origin,
 696                                         "MODE %s %s%s", Channel_Name(Channel),
 697                                         the_modes, the_args);
 698                         IRC_WriteStrChannelPrefix(Client, Channel, Origin,
 699                                 false, "MODE %s %s%s", Channel_Name(Channel),
 700                                 the_modes, the_args);
 701                 }
 702         }
 703
 704         IRC_SetPenalty(Client, 1);
 705         return connected;
 706 } /* Channel_Mode */
 707
 708
 709 GLOBAL bool
 710 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 711 {
 712         assert( Client != NULL );
 713         assert( Req != NULL );
 714
 715         if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 716
 717         if(( Req->argc == 1 ) && (Req->argv[0][0] ))
 718         {
 719                 Client_SetAway( Client, Req->argv[0] );
 720                 Client_ModeAdd( Client, 'a' );
 721                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
 722                 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
 723         }
 724         else
 725         {
 726                 Client_ModeDel( Client, 'a' );
 727                 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
 728                 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
 729         }
 730 } /* IRC_AWAY */
 731
 732
 733 static bool
 734 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 735 {
 736         const char *mask;
 737         bool already;
 738         bool ret;
 739
 740         assert( Client != NULL );
 741         assert( Channel != NULL );
 742         assert( Pattern != NULL );
 743         assert(what == 'I' || what == 'b');
 744
 745         mask = Lists_MakeMask(Pattern);
 746
 747         already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
 748         if (!already) {
 749                 if (what == 'I')
 750                         ret = Channel_AddInvite(Channel, mask, false);
 751                 else
 752                         ret = Channel_AddBan(Channel, mask);
 753                 if (!ret)
 754                         return CONNECTED;
 755         }
 756         if (already && (Client_Type(Prefix) == CLIENT_SERVER))
 757                 return CONNECTED;
 758
 759         if (what == 'I')
 760                 return Send_ListChange("+I", Prefix, Client, Channel, mask);
 761         return Send_ListChange("+b", Prefix, Client, Channel, mask);
 762 }
 763
 764
 765 static bool
 766 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
 767 {
 768         const char *mask;
 769         struct list_head *list;
 770
 771         assert( Client != NULL );
 772         assert( Channel != NULL );
 773         assert( Pattern != NULL );
 774         assert(what == 'I' || what == 'b');
 775
 776         mask = Lists_MakeMask( Pattern );
 777
 778         if (what == 'I')
 779                 list = Channel_GetListInvites(Channel);
 780         else
 781                 list = Channel_GetListBans(Channel);
 782
 783         Lists_Del(list, mask);
 784         if (what == 'I')
 785                 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
 786         return Send_ListChange( "-b", Prefix, Client, Channel, mask );
 787 }
 788
 789
 790 static bool
 791 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
 792                 CHANNEL *Channel, const char *Mask)
 793 {
 794         bool ok;
 795
 796         if( Client_Type( Client ) == CLIENT_USER )
 797         {
 798                 /* send confirmation to client */
 799                 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 800         }
 801         else ok = true;
 802
 803         /* to other servers */
 804         IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 805
 806         /* and local users in channel */
 807         IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
 808
 809         return ok;
 810 } /* Send_ListChange */
 811
 812
 813 /* -eof- */