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