src/ngircd/irc-channel.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
   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  * IRC channel commands
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22
  23 #include "defines.h"
  24 #include "conn.h"
  25 #include "client.h"
  26 #include "channel.h"
  27 #include "conn-func.h"
  28 #include "lists.h"
  29 #include "log.h"
  30 #include "match.h"
  31 #include "messages.h"
  32 #include "parse.h"
  33 #include "irc-info.h"
  34 #include "irc-write.h"
  35 #include "resolve.h"
  36 #include "conf.h"
  37
  38 #include "exp.h"
  39 #include "irc-channel.h"
  40
  41
  42 /*
  43  * RFC 2812, (3.2.1 Join message Command):
  44  *  Note that this message
  45  *  accepts a special argument ("0"), which is a special request to leave all
  46  *  channels the user is currently a member of. The server will process this
  47  *  message as if the user had sent a PART command (See Section 3.2.2) for
  48  *  each channel he is a member of.
  49  */
  50 static bool
  51 part_from_all_channels(CLIENT* client, CLIENT *target)
  52 {
  53         CL2CHAN *cl2chan;
  54         CHANNEL *chan;
  55
  56         while ((cl2chan = Channel_FirstChannelOf(target))) {
  57                 chan = Channel_GetChannel(cl2chan);
  58                 assert( chan != NULL );
  59                 Channel_Part(target, client, Channel_Name(chan), Client_ID(target));
  60         }
  61         return CONNECTED;
  62 }
  63
  64
  65 /**
  66  * Check weather a local client is allowed to join an already existing
  67  * channel or not.
  68  * @param Client Client that sent the JOIN command
  69  * @param chan Channel to check
  70  * @param channame Name of the channel
  71  * @param key Provided channel key (or NULL if none has been provided)
  72  * @return true if client is allowed to join channel, false otherwise
  73  */
  74 static bool
  75 join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
  76              const char *key)
  77 {
  78         bool is_invited, is_banned;
  79         const char *channel_modes;
  80
  81         /* Allow IRC operators to overwrite channel limits */
  82         if (strchr(Client_Modes(Client), 'o'))
  83                 return true;
  84
  85         is_banned = Lists_Check(Channel_GetListBans(chan), Client);
  86         is_invited = Lists_Check(Channel_GetListInvites(chan), Client);
  87
  88         if (is_banned && !is_invited) {
  89                 /* Client is banned from channel (and not on invite list) */
  90                 IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG,
  91                                    Client_ID(Client), channame);
  92                 return false;
  93         }
  94
  95         channel_modes = Channel_Modes(chan);
  96         if ((strchr(channel_modes, 'i')) && !is_invited) {
  97                 /* Channel is "invite-only" and client is not on invite list */
  98                 IRC_WriteStrClient(Client, ERR_INVITEONLYCHAN_MSG,
  99                                    Client_ID(Client), channame);
 100                 return false;
 101         }
 102
 103         if (!Channel_CheckKey(chan, Client, key ? key : "")) {
 104                 /* Channel is protected by a channel key and the client
 105                  * didn't specify the correct one */
 106                 IRC_WriteStrClient(Client, ERR_BADCHANNELKEY_MSG,
 107                                    Client_ID(Client), channame);
 108                 return false;
 109         }
 110
 111         if ((strchr(channel_modes, 'l')) &&
 112             (Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
 113                 /* There are more clints joined to this channel than allowed */
 114                 IRC_WriteStrClient(Client, ERR_CHANNELISFULL_MSG,
 115                                    Client_ID(Client), channame);
 116                 return false;
 117         }
 118
 119         return true;
 120 }
 121
 122
 123 static void
 124 join_set_channelmodes(CHANNEL *chan, CLIENT *target, const char *flags)
 125 {
 126         if (flags) {
 127                 while (*flags) {
 128                         Channel_UserModeAdd(chan, target, *flags);
 129                         flags++;
 130                 }
 131         }
 132
 133         /* If channel persistent and client is ircop: make client chanop */
 134         if (strchr(Channel_Modes(chan), 'P') && strchr(Client_Modes(target), 'o'))
 135                 Channel_UserModeAdd(chan, target, 'o');
 136 }
 137
 138
 139 static void
 140 cb_join_forward(CLIENT *To, CLIENT *Prefix, void *Data)
 141 {
 142         CONN_ID conn;
 143         char str[COMMAND_LEN], *ptr = NULL;
 144
 145         strlcpy(str, (char *)Data, sizeof(str));
 146         conn = Client_Conn(To);
 147
 148         if (Conn_Options(conn) & CONN_RFC1459) {
 149                 /* RFC 1459 compatibility mode, appended modes are NOT
 150                  * supported, so strip them off! */
 151                 ptr = strchr(str, 0x7);
 152                 if (ptr)
 153                         *ptr++ = '\0';
 154         }
 155
 156         IRC_WriteStrClientPrefix(To, Prefix, "JOIN %s", str);
 157         if (ptr && *ptr)
 158                 IRC_WriteStrClientPrefix(To, Prefix, "MODE %s +%s %s", str, ptr,
 159                                          Client_ID(Prefix));
 160 } /* cb_join_forward */
 161
 162
 163 static void
 164 join_forward(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 165                                         const char *channame)
 166 {
 167         char modes[CHANNEL_MODE_LEN], str[COMMAND_LEN];
 168
 169         strlcpy(&modes[1], Channel_UserModes(chan, target), sizeof(modes) - 1);
 170         if (modes[1])
 171                 modes[0] = 0x7;
 172         else
 173                 modes[0] = '\0';
 174
 175         /* forward to other servers (if it is not a local channel) */
 176         if (!Channel_IsLocal(chan)) {
 177                 snprintf(str, sizeof(str), "%s%s", channame, modes);
 178                 IRC_WriteStrServersPrefixFlag_CB(Client, target, '\0',
 179                                                  cb_join_forward, str);
 180         }
 181
 182         /* tell users in this channel about the new client */
 183         IRC_WriteStrChannelPrefix(Client, chan, target, false,
 184                                   "JOIN :%s",  channame);
 185
 186         /* syncronize channel modes */
 187         if (modes[1]) {
 188                 IRC_WriteStrChannelPrefix(Client, chan, target, false,
 189                                           "MODE %s +%s %s", channame,
 190                                           &modes[1], Client_ID(target));
 191         }
 192 } /* join_forward */
 193
 194
 195 static bool
 196 join_send_topic(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 197                                         const char *channame)
 198 {
 199         const char *topic;
 200
 201         if (Client_Type(Client) != CLIENT_USER)
 202                 return true;
 203         /* acknowledge join */
 204         if (!IRC_WriteStrClientPrefix(Client, target, "JOIN :%s", channame))
 205                 return false;
 206
 207         /* Send topic to client, if any */
 208         topic = Channel_Topic(chan);
 209         assert(topic != NULL);
 210         if (*topic) {
 211                 if (!IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 212                         Client_ID(Client), channame, topic))
 213                                 return false;
 214 #ifndef STRICT_RFC
 215                 if (!IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 216                         Client_ID(Client), channame,
 217                         Channel_TopicWho(chan),
 218                         Channel_TopicTime(chan)))
 219                                 return false;
 220 #endif
 221         }
 222         /* send list of channel members to client */
 223         if (!IRC_Send_NAMES(Client, chan))
 224                 return false;
 225         return IRC_WriteStrClient(Client, RPL_ENDOFNAMES_MSG, Client_ID(Client), Channel_Name(chan));
 226 }
 227
 228
 229 GLOBAL bool
 230 IRC_JOIN( CLIENT *Client, REQUEST *Req )
 231 {
 232         char *channame, *key = NULL, *flags, *lastkey = NULL, *lastchan = NULL;
 233         CLIENT *target;
 234         CHANNEL *chan;
 235
 236         assert( Client != NULL );
 237         assert( Req != NULL );
 238
 239         /* Bad number of arguments? */
 240         if (Req->argc < 1 || Req->argc > 2)
 241                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 242                                           Client_ID(Client), Req->command);
 243
 244         /* Who is the sender? */
 245         if (Client_Type(Client) == CLIENT_SERVER)
 246                 target = Client_Search(Req->prefix);
 247         else
 248                 target = Client;
 249
 250         if (!target)
 251                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix);
 252
 253         /* Is argument "0"? */
 254         if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
 255                 return part_from_all_channels(Client, target);
 256
 257         /* Are channel keys given? */
 258         if (Req->argc > 1)
 259                 key = strtok_r(Req->argv[1], ",", &lastkey);
 260
 261         channame = Req->argv[0];
 262         channame = strtok_r(channame, ",", &lastchan);
 263
 264         /* Make sure that "channame" is not the empty string ("JOIN :") */
 265         if (! channame)
 266                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 267                                           Client_ID(Client), Req->command);
 268
 269         while (channame) {
 270                 flags = NULL;
 271
 272                 /* Did the server include channel-user-modes? */
 273                 if (Client_Type(Client) == CLIENT_SERVER) {
 274                         flags = strchr(channame, 0x7);
 275                         if (flags) {
 276                                 *flags = '\0';
 277                                 flags++;
 278                         }
 279                 }
 280
 281                 chan = Channel_Search(channame);
 282                 if (!chan && Conf_PredefChannelsOnly) {
 283                          /* channel must be created, but server does not allow this */
 284                         IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG, Client_ID(Client), channame);
 285                         break;
 286                 }
 287
 288                 /* Local client? */
 289                 if (Client_Type(Client) == CLIENT_USER) {
 290                         /* Test if the user has reached the channel limit */
 291                         if ((Conf_MaxJoins > 0) &&
 292                             (Channel_CountForUser(Client) >= Conf_MaxJoins))
 293                                 return IRC_WriteStrClient(Client,
 294                                                 ERR_TOOMANYCHANNELS_MSG,
 295                                                 Client_ID(Client), channame);
 296                         if (chan) {
 297                                 /* Already existing channel: check if the
 298                                  * client is allowed to join */
 299                                 if (!join_allowed(Client, chan, channame, key))
 300                                         break;
 301                         } else {
 302                                 /* New channel: first user will become channel
 303                                  * operator unless this is a modeless channel */
 304                                 if (*channame != '+')
 305                                         flags = "o";
 306                         }
 307
 308                         /* Local client: update idle time */
 309                         Conn_UpdateIdle(Client_Conn(Client));
 310                 } else {
 311                         /* Remote server: we don't need to know whether the
 312                          * client is invited or not, but we have to make sure
 313                          * that the "one shot" entries (generated by INVITE
 314                          * commands) in this list become deleted when a user
 315                          * joins a channel this way. */
 316                         if (chan)
 317                                 (void)Lists_Check(Channel_GetListInvites(chan),
 318                                                   target);
 319                 }
 320
 321                 /* Join channel (and create channel if it doesn't exist) */
 322                 if (!Channel_Join(target, channame))
 323                         break;
 324
 325                 if (!chan) { /* channel is new; it has been created above */
 326                         chan = Channel_Search(channame);
 327                         assert(chan != NULL);
 328                         if (Channel_IsModeless(chan)) {
 329                                 Channel_ModeAdd(chan, 't'); /* /TOPIC not allowed */
 330                                 Channel_ModeAdd(chan, 'n'); /* no external msgs */
 331                         }
 332                 }
 333                 assert(chan != NULL);
 334
 335                 join_set_channelmodes(chan, target, flags);
 336
 337                 join_forward(Client, target, chan, channame);
 338
 339                 if (!join_send_topic(Client, target, chan, channame))
 340                         break; /* write error */
 341
 342                 /* next channel? */
 343                 channame = strtok_r(NULL, ",", &lastchan);
 344                 if (channame && key)
 345                         key = strtok_r(NULL, ",", &lastkey);
 346         }
 347         return CONNECTED;
 348 } /* IRC_JOIN */
 349
 350
 351 /**
 352  * Handler for the IRC "PART" command.
 353  */
 354 GLOBAL bool
 355 IRC_PART(CLIENT * Client, REQUEST * Req)
 356 {
 357         CLIENT *target;
 358         char *chan;
 359
 360         assert(Client != NULL);
 361         assert(Req != NULL);
 362
 363         if (Req->argc < 1 || Req->argc > 2)
 364                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 365                                           Client_ID(Client), Req->command);
 366
 367         /* Get the sender */
 368         if (Client_Type(Client) == CLIENT_SERVER)
 369                 target = Client_Search(Req->prefix);
 370         else
 371                 target = Client;
 372         if (!target)
 373                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 374                                           Client_ID(Client), Req->prefix);
 375
 376         /* Loop over all the given channel names */
 377         chan = strtok(Req->argv[0], ",");
 378
 379         /* Make sure that "chan" is not the empty string ("PART :") */
 380         if (! chan)
 381                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 382                                           Client_ID(Client), Req->command);
 383
 384         while (chan) {
 385                 Channel_Part(target, Client, chan,
 386                              Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 387                 chan = strtok(NULL, ",");
 388         }
 389
 390         /* Update idle time, if local client */
 391         if (Client_Conn(Client) > NONE)
 392                 Conn_UpdateIdle(Client_Conn(Client));
 393
 394         return CONNECTED;
 395 } /* IRC_PART */
 396
 397
 398 GLOBAL bool
 399 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 400 {
 401         CHANNEL *chan;
 402         CLIENT *from;
 403         char *topic;
 404         bool r;
 405
 406         assert( Client != NULL );
 407         assert( Req != NULL );
 408
 409         if ((Req->argc < 1) || (Req->argc > 2))
 410                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command);
 411
 412         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 413         else from = Client;
 414         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 415
 416         /* Welcher Channel? */
 417         chan = Channel_Search( Req->argv[0] );
 418         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 419
 420         /* Ist der User Mitglied in dem Channel? */
 421         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 422
 423         if( Req->argc == 1 )
 424         {
 425                 /* Request actual topic */
 426                 topic = Channel_Topic(chan);
 427                 if (*topic) {
 428                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 429                                 Client_ID(Client), Channel_Name(chan), topic);
 430 #ifndef STRICT_RFC
 431                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 432                                 Client_ID(Client), Channel_Name(chan),
 433                                 Channel_TopicWho(chan),
 434                                 Channel_TopicTime(chan));
 435 #endif
 436                         return r;
 437                 }
 438                 else
 439                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 440                                         Client_ID(from), Channel_Name(chan));
 441         }
 442
 443         if( strchr( Channel_Modes( chan ), 't' ))
 444         {
 445                 /* Topic Lock. Ist der User ein Channel Operator? */
 446                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 447         }
 448
 449         /* Set new topic */
 450         Channel_SetTopic(chan, from, Req->argv[1]);
 451         LogDebug("%s \"%s\" set topic on \"%s\": %s",
 452                  Client_TypeText(from), Client_Mask(from), Channel_Name(chan),
 453                  Req->argv[1][0] ? Req->argv[1] : "<none>");
 454
 455         /* Update channel and forward new topic to other servers */
 456         if (!Channel_IsLocal(chan))
 457                 IRC_WriteStrServersPrefix(Client, from, "TOPIC %s :%s",
 458                                           Req->argv[0], Req->argv[1]);
 459         IRC_WriteStrChannelPrefix(Client, chan, from, false, "TOPIC %s :%s",
 460                                   Req->argv[0], Req->argv[1]);
 461
 462         if (Client_Type(Client) == CLIENT_USER)
 463                 return IRC_WriteStrClientPrefix(Client, Client, "TOPIC %s :%s",
 464                                                 Req->argv[0], Req->argv[1]);
 465         else
 466                 return CONNECTED;
 467 } /* IRC_TOPIC */
 468
 469
 470 /**
 471  * Handler for the IRC "LIST" command.
 472  * This implementation handles the local case as well as the forwarding of the
 473  * LIST command to other servers in the IRC network.
 474  */
 475 GLOBAL bool
 476 IRC_LIST( CLIENT *Client, REQUEST *Req )
 477 {
 478         char *pattern;
 479         CHANNEL *chan;
 480         CLIENT *from, *target;
 481
 482         assert( Client != NULL );
 483         assert( Req != NULL );
 484
 485         /* Bad number of prameters? */
 486         if( Req->argc > 2 )
 487                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 488                         Client_ID( Client ), Req->command );
 489
 490         if( Req->argc > 0 )
 491                 pattern = strtok( Req->argv[0], "," );
 492         else
 493                 pattern = "*";
 494
 495         /* Get sender from prefix, if any */
 496         if( Client_Type( Client ) == CLIENT_SERVER )
 497                 from = Client_Search( Req->prefix );
 498         else
 499                 from = Client;
 500
 501         if( ! from )
 502                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 503                                 Client_ID( Client ), Req->prefix );
 504
 505         if( Req->argc == 2 )
 506         {
 507                 /* Forward to other server? */
 508                 target = Client_Search( Req->argv[1] );
 509                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 510                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 511                                         Client_ID( Client ), Req->argv[1] );
 512
 513                 if( target != Client_ThisServer( ))
 514                 {
 515                         /* Target is indeed an other server, forward it! */
 516                         return IRC_WriteStrClientPrefix( target, from,
 517                                         "LIST %s :%s", Client_ID( from ),
 518                                         Req->argv[1] );
 519                 }
 520         }
 521
 522         while( pattern )
 523         {
 524                 /* Loop through all the channels */
 525                 chan = Channel_First( );
 526                 while( chan )
 527                 {
 528                         /* Check search pattern */
 529                         if( Match( pattern, Channel_Name( chan )))
 530                         {
 531                                 /* Gotcha! */
 532                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 533                                     Channel_IsMemberOf( chan, from ))
 534                                 {
 535                                         if( ! IRC_WriteStrClient( from,
 536                                             RPL_LIST_MSG, Client_ID( from ),
 537                                             Channel_Name( chan ),
 538                                             Channel_MemberCount( chan ),
 539                                             Channel_Topic( chan )))
 540                                                 return DISCONNECTED;
 541                                 }
 542                         }
 543                         chan = Channel_Next( chan );
 544                 }
 545
 546                 /* Get next name ... */
 547                 if( Req->argc > 0 )
 548                         pattern = strtok( NULL, "," );
 549                 else
 550                         pattern = NULL;
 551         }
 552
 553         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 554 } /* IRC_LIST */
 555
 556
 557 GLOBAL bool
 558 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 559 {
 560         char modes_add[COMMAND_LEN], l[16], *ptr;
 561         CLIENT *from;
 562         CHANNEL *chan;
 563         int arg_topic;
 564
 565         assert( Client != NULL );
 566         assert( Req != NULL );
 567
 568         /* Bad number of parameters? */
 569         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 570
 571         /* Compatibility kludge */
 572         if( Req->argc == 5 ) arg_topic = 4;
 573         else if( Req->argc == 3 ) arg_topic = 2;
 574         else arg_topic = -1;
 575
 576         /* Search origin */
 577         from = Client_Search( Req->prefix );
 578         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 579
 580         /* Search or create channel */
 581         chan = Channel_Search( Req->argv[0] );
 582         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 583         if( ! chan ) return CONNECTED;
 584
 585         if( Req->argv[1][0] == '+' )
 586         {
 587                 ptr = Channel_Modes( chan );
 588                 if( ! *ptr )
 589                 {
 590                         /* OK, this channel doesn't have modes jet, set the received ones: */
 591                         Channel_SetModes( chan, &Req->argv[1][1] );
 592
 593                         if( Req->argc == 5 )
 594                         {
 595                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 596                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 597                         }
 598                         else
 599                         {
 600                                 /* Delete modes which we never want to inherit */
 601                                 Channel_ModeDel( chan, 'l' );
 602                                 Channel_ModeDel( chan, 'k' );
 603                         }
 604
 605                         strcpy( modes_add, "" );
 606                         ptr = Channel_Modes( chan );
 607                         while( *ptr )
 608                         {
 609                                 if( *ptr == 'l' )
 610                                 {
 611                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 612                                         strlcat( modes_add, l, sizeof( modes_add ));
 613                                 }
 614                                 if( *ptr == 'k' )
 615                                 {
 616                                         strlcat( modes_add, " ", sizeof( modes_add ));
 617                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 618                                 }
 619                                 ptr++;
 620                         }
 621
 622                         /* Inform members of this channel */
 623                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 624                 }
 625         }
 626         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 627
 628         if( arg_topic > 0 )
 629         {
 630                 /* We got a topic */
 631                 ptr = Channel_Topic( chan );
 632                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 633                 {
 634                         /* OK, there is no topic jet */
 635                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 636                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 637                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 638                 }
 639         }
 640
 641         /* Forward CHANINFO to other serevrs */
 642         if( Req->argc == 5 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2], Req->argv[3], Req->argv[4] );
 643         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 644         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 645
 646         return CONNECTED;
 647 } /* IRC_CHANINFO */
 648
 649
 650 /* -eof- */