src/ngircd/irc-channel.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2010 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 "conf.h"
  36
  37 #include "exp.h"
  38 #include "irc-channel.h"
  39
  40
  41 /*
  42  * RFC 2812, (3.2.1 Join message Command):
  43  *  Note that this message
  44  *  accepts a special argument ("0"), which is a special request to leave all
  45  *  channels the user is currently a member of. The server will process this
  46  *  message as if the user had sent a PART command (See Section 3.2.2) for
  47  *  each channel he is a member of.
  48  */
  49 static bool
  50 part_from_all_channels(CLIENT* client, CLIENT *target)
  51 {
  52         CL2CHAN *cl2chan;
  53         CHANNEL *chan;
  54
  55         while ((cl2chan = Channel_FirstChannelOf(target))) {
  56                 chan = Channel_GetChannel(cl2chan);
  57                 assert( chan != NULL );
  58                 Channel_Part(target, client, Channel_Name(chan), Client_ID(target));
  59         }
  60         return CONNECTED;
  61 }
  62
  63
  64 /**
  65  * Check weather a local client is allowed to join an already existing
  66  * channel or not.
  67  * @param Client Client that sent the JOIN command
  68  * @param chan Channel to check
  69  * @param channame Name of the channel
  70  * @param key Provided channel key (or NULL if none has been provided)
  71  * @return true if client is allowed to join channel, false otherwise
  72  */
  73 static bool
  74 join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
  75              const char *key)
  76 {
  77         bool is_invited, is_banned;
  78         const char *channel_modes;
  79
  80         /* Allow IRC operators to overwrite channel limits */
  81         if (strchr(Client_Modes(Client), 'o'))
  82                 return true;
  83
  84         is_banned = Lists_Check(Channel_GetListBans(chan), Client);
  85         is_invited = Lists_Check(Channel_GetListInvites(chan), Client);
  86
  87         if (is_banned && !is_invited) {
  88                 /* Client is banned from channel (and not on invite list) */
  89                 IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG,
  90                                    Client_ID(Client), channame);
  91                 return false;
  92         }
  93
  94         channel_modes = Channel_Modes(chan);
  95         if (strchr(channel_modes, 'i') && !is_invited) {
  96                 /* Channel is "invite-only" and client is not on invite list */
  97                 IRC_WriteStrClient(Client, ERR_INVITEONLYCHAN_MSG,
  98                                    Client_ID(Client), channame);
  99                 return false;
 100         }
 101
 102         if (!Channel_CheckKey(chan, Client, key ? key : "")) {
 103                 /* Channel is protected by a channel key and the client
 104                  * didn't specify the correct one */
 105                 IRC_WriteStrClient(Client, ERR_BADCHANNELKEY_MSG,
 106                                    Client_ID(Client), channame);
 107                 return false;
 108         }
 109
 110         if (strchr(channel_modes, 'l') &&
 111             (Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
 112                 /* There are more clints joined to this channel than allowed */
 113                 IRC_WriteStrClient(Client, ERR_CHANNELISFULL_MSG,
 114                                    Client_ID(Client), channame);
 115                 return false;
 116         }
 117
 118         if (strchr(channel_modes, 'z') && !Conn_UsesSSL(Client_Conn(Client))) {
 119                 /* Only "secure" clients are allowed, but clients doesn't
 120                  * use SSL encryption */
 121                 IRC_WriteStrClient(Client, ERR_SECURECHANNEL_MSG,
 122                                    Client_ID(Client), channame);
 123                 return false;
 124         }
 125
 126         return true;
 127 }
 128
 129
 130 static void
 131 join_set_channelmodes(CHANNEL *chan, CLIENT *target, const char *flags)
 132 {
 133         if (flags) {
 134                 while (*flags) {
 135                         Channel_UserModeAdd(chan, target, *flags);
 136                         flags++;
 137                 }
 138         }
 139
 140         /* If channel persistent and client is ircop: make client chanop */
 141         if (strchr(Channel_Modes(chan), 'P') && strchr(Client_Modes(target), 'o'))
 142                 Channel_UserModeAdd(chan, target, 'o');
 143 }
 144
 145
 146 static void
 147 cb_join_forward(CLIENT *To, CLIENT *Prefix, void *Data)
 148 {
 149         CONN_ID conn;
 150         char str[COMMAND_LEN], *ptr = NULL;
 151
 152         strlcpy(str, (char *)Data, sizeof(str));
 153         conn = Client_Conn(To);
 154
 155         if (Conn_Options(conn) & CONN_RFC1459) {
 156                 /* RFC 1459 compatibility mode, appended modes are NOT
 157                  * supported, so strip them off! */
 158                 ptr = strchr(str, 0x7);
 159                 if (ptr)
 160                         *ptr++ = '\0';
 161         }
 162
 163         IRC_WriteStrClientPrefix(To, Prefix, "JOIN %s", str);
 164         if (ptr && *ptr)
 165                 IRC_WriteStrClientPrefix(To, Prefix, "MODE %s +%s %s", str, ptr,
 166                                          Client_ID(Prefix));
 167 } /* cb_join_forward */
 168
 169
 170 static void
 171 join_forward(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 172                                         const char *channame)
 173 {
 174         char modes[CHANNEL_MODE_LEN], str[COMMAND_LEN];
 175
 176         strlcpy(&modes[1], Channel_UserModes(chan, target), sizeof(modes) - 1);
 177         if (modes[1])
 178                 modes[0] = 0x7;
 179         else
 180                 modes[0] = '\0';
 181
 182         /* forward to other servers (if it is not a local channel) */
 183         if (!Channel_IsLocal(chan)) {
 184                 snprintf(str, sizeof(str), "%s%s", channame, modes);
 185                 IRC_WriteStrServersPrefixFlag_CB(Client, target, '\0',
 186                                                  cb_join_forward, str);
 187         }
 188
 189         /* tell users in this channel about the new client */
 190         IRC_WriteStrChannelPrefix(Client, chan, target, false,
 191                                   "JOIN :%s",  channame);
 192
 193         /* syncronize channel modes */
 194         if (modes[1]) {
 195                 IRC_WriteStrChannelPrefix(Client, chan, target, false,
 196                                           "MODE %s +%s %s", channame,
 197                                           &modes[1], Client_ID(target));
 198         }
 199 } /* join_forward */
 200
 201
 202 static bool
 203 join_send_topic(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 204                                         const char *channame)
 205 {
 206         const char *topic;
 207
 208         if (Client_Type(Client) != CLIENT_USER)
 209                 return true;
 210         /* acknowledge join */
 211         if (!IRC_WriteStrClientPrefix(Client, target, "JOIN :%s", channame))
 212                 return false;
 213
 214         /* Send topic to client, if any */
 215         topic = Channel_Topic(chan);
 216         assert(topic != NULL);
 217         if (*topic) {
 218                 if (!IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 219                         Client_ID(Client), channame, topic))
 220                                 return false;
 221 #ifndef STRICT_RFC
 222                 if (!IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 223                         Client_ID(Client), channame,
 224                         Channel_TopicWho(chan),
 225                         Channel_TopicTime(chan)))
 226                                 return false;
 227 #endif
 228         }
 229         /* send list of channel members to client */
 230         if (!IRC_Send_NAMES(Client, chan))
 231                 return false;
 232         return IRC_WriteStrClient(Client, RPL_ENDOFNAMES_MSG, Client_ID(Client), Channel_Name(chan));
 233 }
 234
 235
 236 GLOBAL bool
 237 IRC_JOIN( CLIENT *Client, REQUEST *Req )
 238 {
 239         char *channame, *key = NULL, *flags, *lastkey = NULL, *lastchan = NULL;
 240         CLIENT *target;
 241         CHANNEL *chan;
 242
 243         assert( Client != NULL );
 244         assert( Req != NULL );
 245
 246         /* Bad number of arguments? */
 247         if (Req->argc < 1 || Req->argc > 2)
 248                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 249                                           Client_ID(Client), Req->command);
 250
 251         /* Who is the sender? */
 252         if (Client_Type(Client) == CLIENT_SERVER)
 253                 target = Client_Search(Req->prefix);
 254         else
 255                 target = Client;
 256
 257         if (!target)
 258                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix);
 259
 260         /* Is argument "0"? */
 261         if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
 262                 return part_from_all_channels(Client, target);
 263
 264         /* Are channel keys given? */
 265         if (Req->argc > 1)
 266                 key = strtok_r(Req->argv[1], ",", &lastkey);
 267
 268         channame = Req->argv[0];
 269         channame = strtok_r(channame, ",", &lastchan);
 270
 271         /* Make sure that "channame" is not the empty string ("JOIN :") */
 272         if (! channame)
 273                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 274                                           Client_ID(Client), Req->command);
 275
 276         while (channame) {
 277                 flags = NULL;
 278
 279                 /* Did the server include channel-user-modes? */
 280                 if (Client_Type(Client) == CLIENT_SERVER) {
 281                         flags = strchr(channame, 0x7);
 282                         if (flags) {
 283                                 *flags = '\0';
 284                                 flags++;
 285                         }
 286                 }
 287
 288                 chan = Channel_Search(channame);
 289                 if (!chan && Conf_PredefChannelsOnly) {
 290                          /* channel must be created, but server does not allow this */
 291                         IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG, Client_ID(Client), channame);
 292                         break;
 293                 }
 294
 295                 /* Local client? */
 296                 if (Client_Type(Client) == CLIENT_USER) {
 297                         /* Test if the user has reached the channel limit */
 298                         if ((Conf_MaxJoins > 0) &&
 299                             (Channel_CountForUser(Client) >= Conf_MaxJoins))
 300                                 return IRC_WriteStrClient(Client,
 301                                                 ERR_TOOMANYCHANNELS_MSG,
 302                                                 Client_ID(Client), channame);
 303                         if (chan) {
 304                                 /* Already existing channel: check if the
 305                                  * client is allowed to join */
 306                                 if (!join_allowed(Client, chan, channame, key))
 307                                         break;
 308                         } else {
 309                                 /* New channel: first user will become channel
 310                                  * operator unless this is a modeless channel */
 311                                 if (*channame != '+')
 312                                         flags = "o";
 313                         }
 314
 315                         /* Local client: update idle time */
 316                         Conn_UpdateIdle(Client_Conn(Client));
 317                 } else {
 318                         /* Remote server: we don't need to know whether the
 319                          * client is invited or not, but we have to make sure
 320                          * that the "one shot" entries (generated by INVITE
 321                          * commands) in this list become deleted when a user
 322                          * joins a channel this way. */
 323                         if (chan)
 324                                 (void)Lists_Check(Channel_GetListInvites(chan),
 325                                                   target);
 326                 }
 327
 328                 /* Join channel (and create channel if it doesn't exist) */
 329                 if (!Channel_Join(target, channame))
 330                         break;
 331
 332                 if (!chan) { /* channel is new; it has been created above */
 333                         chan = Channel_Search(channame);
 334                         assert(chan != NULL);
 335                         if (Channel_IsModeless(chan)) {
 336                                 Channel_ModeAdd(chan, 't'); /* /TOPIC not allowed */
 337                                 Channel_ModeAdd(chan, 'n'); /* no external msgs */
 338                         }
 339                 }
 340                 assert(chan != NULL);
 341
 342                 join_set_channelmodes(chan, target, flags);
 343
 344                 join_forward(Client, target, chan, channame);
 345
 346                 if (!join_send_topic(Client, target, chan, channame))
 347                         break; /* write error */
 348
 349                 /* next channel? */
 350                 channame = strtok_r(NULL, ",", &lastchan);
 351                 if (channame && key)
 352                         key = strtok_r(NULL, ",", &lastkey);
 353         }
 354         return CONNECTED;
 355 } /* IRC_JOIN */
 356
 357
 358 /**
 359  * Handler for the IRC "PART" command.
 360  */
 361 GLOBAL bool
 362 IRC_PART(CLIENT * Client, REQUEST * Req)
 363 {
 364         CLIENT *target;
 365         char *chan;
 366
 367         assert(Client != NULL);
 368         assert(Req != NULL);
 369
 370         if (Req->argc < 1 || Req->argc > 2)
 371                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 372                                           Client_ID(Client), Req->command);
 373
 374         /* Get the sender */
 375         if (Client_Type(Client) == CLIENT_SERVER)
 376                 target = Client_Search(Req->prefix);
 377         else
 378                 target = Client;
 379         if (!target)
 380                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 381                                           Client_ID(Client), Req->prefix);
 382
 383         /* Loop over all the given channel names */
 384         chan = strtok(Req->argv[0], ",");
 385
 386         /* Make sure that "chan" is not the empty string ("PART :") */
 387         if (! chan)
 388                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 389                                           Client_ID(Client), Req->command);
 390
 391         while (chan) {
 392                 Channel_Part(target, Client, chan,
 393                              Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 394                 chan = strtok(NULL, ",");
 395         }
 396
 397         /* Update idle time, if local client */
 398         if (Client_Conn(Client) > NONE)
 399                 Conn_UpdateIdle(Client_Conn(Client));
 400
 401         return CONNECTED;
 402 } /* IRC_PART */
 403
 404
 405 GLOBAL bool
 406 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 407 {
 408         CHANNEL *chan;
 409         CLIENT *from;
 410         char *topic;
 411         bool r;
 412
 413         assert( Client != NULL );
 414         assert( Req != NULL );
 415
 416         if ((Req->argc < 1) || (Req->argc > 2))
 417                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command);
 418
 419         if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 420         else from = Client;
 421         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 422
 423         /* Welcher Channel? */
 424         chan = Channel_Search( Req->argv[0] );
 425         if( ! chan ) return IRC_WriteStrClient( from, ERR_NOSUCHCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 426
 427         /* Ist der User Mitglied in dem Channel? */
 428         if( ! Channel_IsMemberOf( chan, from )) return IRC_WriteStrClient( from, ERR_NOTONCHANNEL_MSG, Client_ID( from ), Req->argv[0] );
 429
 430         if( Req->argc == 1 )
 431         {
 432                 /* Request actual topic */
 433                 topic = Channel_Topic(chan);
 434                 if (*topic) {
 435                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 436                                 Client_ID(Client), Channel_Name(chan), topic);
 437 #ifndef STRICT_RFC
 438                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 439                                 Client_ID(Client), Channel_Name(chan),
 440                                 Channel_TopicWho(chan),
 441                                 Channel_TopicTime(chan));
 442 #endif
 443                         return r;
 444                 }
 445                 else
 446                          return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 447                                         Client_ID(from), Channel_Name(chan));
 448         }
 449
 450         if( strchr( Channel_Modes( chan ), 't' ))
 451         {
 452                 /* Topic Lock. Ist der User ein Channel Operator? */
 453                 if( ! strchr( Channel_UserModes( chan, from ), 'o' )) return IRC_WriteStrClient( from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID( from ), Channel_Name( chan ));
 454         }
 455
 456         /* Set new topic */
 457         Channel_SetTopic(chan, from, Req->argv[1]);
 458         LogDebug("%s \"%s\" set topic on \"%s\": %s",
 459                  Client_TypeText(from), Client_Mask(from), Channel_Name(chan),
 460                  Req->argv[1][0] ? Req->argv[1] : "<none>");
 461
 462         /* Update channel and forward new topic to other servers */
 463         if (!Channel_IsLocal(chan))
 464                 IRC_WriteStrServersPrefix(Client, from, "TOPIC %s :%s",
 465                                           Req->argv[0], Req->argv[1]);
 466         IRC_WriteStrChannelPrefix(Client, chan, from, false, "TOPIC %s :%s",
 467                                   Req->argv[0], Req->argv[1]);
 468
 469         if (Client_Type(Client) == CLIENT_USER)
 470                 return IRC_WriteStrClientPrefix(Client, Client, "TOPIC %s :%s",
 471                                                 Req->argv[0], Req->argv[1]);
 472         else
 473                 return CONNECTED;
 474 } /* IRC_TOPIC */
 475
 476
 477 /**
 478  * Handler for the IRC "LIST" command.
 479  * This implementation handles the local case as well as the forwarding of the
 480  * LIST command to other servers in the IRC network.
 481  */
 482 GLOBAL bool
 483 IRC_LIST( CLIENT *Client, REQUEST *Req )
 484 {
 485         char *pattern;
 486         CHANNEL *chan;
 487         CLIENT *from, *target;
 488
 489         assert( Client != NULL );
 490         assert( Req != NULL );
 491
 492         /* Bad number of prameters? */
 493         if( Req->argc > 2 )
 494                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 495                         Client_ID( Client ), Req->command );
 496
 497         if( Req->argc > 0 )
 498                 pattern = strtok( Req->argv[0], "," );
 499         else
 500                 pattern = "*";
 501
 502         /* Get sender from prefix, if any */
 503         if( Client_Type( Client ) == CLIENT_SERVER )
 504                 from = Client_Search( Req->prefix );
 505         else
 506                 from = Client;
 507
 508         if( ! from )
 509                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 510                                 Client_ID( Client ), Req->prefix );
 511
 512         if( Req->argc == 2 )
 513         {
 514                 /* Forward to other server? */
 515                 target = Client_Search( Req->argv[1] );
 516                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 517                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 518                                         Client_ID( Client ), Req->argv[1] );
 519
 520                 if( target != Client_ThisServer( ))
 521                 {
 522                         /* Target is indeed an other server, forward it! */
 523                         return IRC_WriteStrClientPrefix( target, from,
 524                                         "LIST %s :%s", Client_ID( from ),
 525                                         Req->argv[1] );
 526                 }
 527         }
 528
 529         while( pattern )
 530         {
 531                 /* Loop through all the channels */
 532                 chan = Channel_First( );
 533                 while( chan )
 534                 {
 535                         /* Check search pattern */
 536                         if( Match( pattern, Channel_Name( chan )))
 537                         {
 538                                 /* Gotcha! */
 539                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 540                                     Channel_IsMemberOf( chan, from ))
 541                                 {
 542                                         if( ! IRC_WriteStrClient( from,
 543                                             RPL_LIST_MSG, Client_ID( from ),
 544                                             Channel_Name( chan ),
 545                                             Channel_MemberCount( chan ),
 546                                             Channel_Topic( chan )))
 547                                                 return DISCONNECTED;
 548                                 }
 549                         }
 550                         chan = Channel_Next( chan );
 551                 }
 552
 553                 /* Get next name ... */
 554                 if( Req->argc > 0 )
 555                         pattern = strtok( NULL, "," );
 556                 else
 557                         pattern = NULL;
 558         }
 559
 560         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 561 } /* IRC_LIST */
 562
 563
 564 GLOBAL bool
 565 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 566 {
 567         char modes_add[COMMAND_LEN], l[16], *ptr;
 568         CLIENT *from;
 569         CHANNEL *chan;
 570         int arg_topic;
 571
 572         assert( Client != NULL );
 573         assert( Req != NULL );
 574
 575         /* Bad number of parameters? */
 576         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 577
 578         /* Compatibility kludge */
 579         if( Req->argc == 5 ) arg_topic = 4;
 580         else if( Req->argc == 3 ) arg_topic = 2;
 581         else arg_topic = -1;
 582
 583         /* Search origin */
 584         from = Client_Search( Req->prefix );
 585         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 586
 587         /* Search or create channel */
 588         chan = Channel_Search( Req->argv[0] );
 589         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 590         if( ! chan ) return CONNECTED;
 591
 592         if( Req->argv[1][0] == '+' )
 593         {
 594                 ptr = Channel_Modes( chan );
 595                 if( ! *ptr )
 596                 {
 597                         /* OK, this channel doesn't have modes jet, set the received ones: */
 598                         Channel_SetModes( chan, &Req->argv[1][1] );
 599
 600                         if( Req->argc == 5 )
 601                         {
 602                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 603                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 604                         }
 605                         else
 606                         {
 607                                 /* Delete modes which we never want to inherit */
 608                                 Channel_ModeDel( chan, 'l' );
 609                                 Channel_ModeDel( chan, 'k' );
 610                         }
 611
 612                         strcpy( modes_add, "" );
 613                         ptr = Channel_Modes( chan );
 614                         while( *ptr )
 615                         {
 616                                 if( *ptr == 'l' )
 617                                 {
 618                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 619                                         strlcat( modes_add, l, sizeof( modes_add ));
 620                                 }
 621                                 if( *ptr == 'k' )
 622                                 {
 623                                         strlcat( modes_add, " ", sizeof( modes_add ));
 624                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 625                                 }
 626                                 ptr++;
 627                         }
 628
 629                         /* Inform members of this channel */
 630                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 631                 }
 632         }
 633         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 634
 635         if( arg_topic > 0 )
 636         {
 637                 /* We got a topic */
 638                 ptr = Channel_Topic( chan );
 639                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 640                 {
 641                         /* OK, there is no topic jet */
 642                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 643                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 644                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 645                 }
 646         }
 647
 648         /* Forward CHANINFO to other serevrs */
 649         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] );
 650         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 651         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 652
 653         return CONNECTED;
 654 } /* IRC_CHANINFO */
 655
 656
 657 /* -eof- */