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
  12
  13 #include "portab.h"
  14
  15 /**
  16  * @file
  17  * IRC channel commands
  18  */
  19
  20 #include "imp.h"
  21 #include <assert.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 #include "defines.h"
  27 #include "conn.h"
  28 #include "channel.h"
  29 #include "conn-func.h"
  30 #include "lists.h"
  31 #include "log.h"
  32 #include "match.h"
  33 #include "messages.h"
  34 #include "parse.h"
  35 #include "irc-info.h"
  36 #include "irc-write.h"
  37 #include "conf.h"
  38
  39 #include "exp.h"
  40 #include "irc-channel.h"
  41
  42
  43 /*
  44  * RFC 2812, (3.2.1 Join message Command):
  45  *  Note that this message
  46  *  accepts a special argument ("0"), which is a special request to leave all
  47  *  channels the user is currently a member of. The server will process this
  48  *  message as if the user had sent a PART command (See Section 3.2.2) for
  49  *  each channel he is a member of.
  50  */
  51 static bool
  52 part_from_all_channels(CLIENT* client, CLIENT *target)
  53 {
  54         CL2CHAN *cl2chan;
  55         CHANNEL *chan;
  56
  57         while ((cl2chan = Channel_FirstChannelOf(target))) {
  58                 chan = Channel_GetChannel(cl2chan);
  59                 assert( chan != NULL );
  60                 Channel_Part(target, client, Channel_Name(chan), Client_ID(target));
  61         }
  62         return CONNECTED;
  63 }
  64
  65
  66 /**
  67  * Check weather a local client is allowed to join an already existing
  68  * channel or not.
  69  * @param Client Client that sent the JOIN command
  70  * @param chan Channel to check
  71  * @param channame Name of the channel
  72  * @param key Provided channel key (or NULL if none has been provided)
  73  * @return true if client is allowed to join channel, false otherwise
  74  */
  75 static bool
  76 join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
  77              const char *key)
  78 {
  79         bool is_invited, is_banned;
  80         const char *channel_modes;
  81
  82         /* Allow IRC operators to overwrite channel limits */
  83         if (strchr(Client_Modes(Client), 'o'))
  84                 return true;
  85
  86         is_banned = Lists_Check(Channel_GetListBans(chan), Client);
  87         is_invited = Lists_Check(Channel_GetListInvites(chan), Client);
  88
  89         if (is_banned && !is_invited) {
  90                 /* Client is banned from channel (and not on invite list) */
  91                 IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG,
  92                                    Client_ID(Client), channame);
  93                 return false;
  94         }
  95
  96         channel_modes = Channel_Modes(chan);
  97         if (strchr(channel_modes, 'i') && !is_invited) {
  98                 /* Channel is "invite-only" and client is not on invite list */
  99                 IRC_WriteStrClient(Client, ERR_INVITEONLYCHAN_MSG,
 100                                    Client_ID(Client), channame);
 101                 return false;
 102         }
 103
 104         if (!Channel_CheckKey(chan, Client, key ? key : "")) {
 105                 /* Channel is protected by a channel key and the client
 106                  * didn't specify the correct one */
 107                 IRC_WriteStrClient(Client, ERR_BADCHANNELKEY_MSG,
 108                                    Client_ID(Client), channame);
 109                 return false;
 110         }
 111
 112         if (strchr(channel_modes, 'l') &&
 113             (Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
 114                 /* There are more clints joined to this channel than allowed */
 115                 IRC_WriteStrClient(Client, ERR_CHANNELISFULL_MSG,
 116                                    Client_ID(Client), channame);
 117                 return false;
 118         }
 119
 120         if (strchr(channel_modes, 'z') && !Conn_UsesSSL(Client_Conn(Client))) {
 121                 /* Only "secure" clients are allowed, but clients doesn't
 122                  * use SSL encryption */
 123                 IRC_WriteStrClient(Client, ERR_SECURECHANNEL_MSG,
 124                                    Client_ID(Client), channame);
 125                 return false;
 126         }
 127
 128         if (strchr(channel_modes, 'O') && !Client_OperByMe(Client)) {
 129                 /* Only IRC operators are allowed! */
 130                 IRC_WriteStrClient(Client, ERR_OPONLYCHANNEL_MSG,
 131                                    Client_ID(Client), channame);
 132                 return false;
 133         }
 134
 135         return true;
 136 }
 137
 138
 139 static void
 140 join_set_channelmodes(CHANNEL *chan, CLIENT *target, const char *flags)
 141 {
 142         if (flags) {
 143                 while (*flags) {
 144                         Channel_UserModeAdd(chan, target, *flags);
 145                         flags++;
 146                 }
 147         }
 148
 149         /* If channel persistent and client is ircop: make client chanop */
 150         if (strchr(Channel_Modes(chan), 'P') && strchr(Client_Modes(target), 'o'))
 151                 Channel_UserModeAdd(chan, target, 'o');
 152 }
 153
 154
 155 static void
 156 cb_join_forward(CLIENT *To, CLIENT *Prefix, void *Data)
 157 {
 158         CONN_ID conn;
 159         char str[COMMAND_LEN], *ptr = NULL;
 160
 161         strlcpy(str, (char *)Data, sizeof(str));
 162         conn = Client_Conn(To);
 163
 164         if (Conn_Options(conn) & CONN_RFC1459) {
 165                 /* RFC 1459 compatibility mode, appended modes are NOT
 166                  * supported, so strip them off! */
 167                 ptr = strchr(str, 0x7);
 168                 if (ptr)
 169                         *ptr++ = '\0';
 170         }
 171
 172         IRC_WriteStrClientPrefix(To, Prefix, "JOIN %s", str);
 173         if (ptr && *ptr)
 174                 IRC_WriteStrClientPrefix(To, Prefix, "MODE %s +%s %s", str, ptr,
 175                                          Client_ID(Prefix));
 176 } /* cb_join_forward */
 177
 178
 179 static void
 180 join_forward(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 181                                         const char *channame)
 182 {
 183         char modes[CHANNEL_MODE_LEN], str[COMMAND_LEN];
 184
 185         strlcpy(&modes[1], Channel_UserModes(chan, target), sizeof(modes) - 1);
 186         if (modes[1])
 187                 modes[0] = 0x7;
 188         else
 189                 modes[0] = '\0';
 190
 191         /* forward to other servers (if it is not a local channel) */
 192         if (!Channel_IsLocal(chan)) {
 193                 snprintf(str, sizeof(str), "%s%s", channame, modes);
 194                 IRC_WriteStrServersPrefixFlag_CB(Client, target, '\0',
 195                                                  cb_join_forward, str);
 196         }
 197
 198         /* tell users in this channel about the new client */
 199         IRC_WriteStrChannelPrefix(Client, chan, target, false,
 200                                   "JOIN :%s",  channame);
 201
 202         /* syncronize channel modes */
 203         if (modes[1]) {
 204                 IRC_WriteStrChannelPrefix(Client, chan, target, false,
 205                                           "MODE %s +%s %s", channame,
 206                                           &modes[1], Client_ID(target));
 207         }
 208 } /* join_forward */
 209
 210
 211 static bool
 212 join_send_topic(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 213                                         const char *channame)
 214 {
 215         const char *topic;
 216
 217         if (Client_Type(Client) != CLIENT_USER)
 218                 return true;
 219         /* acknowledge join */
 220         if (!IRC_WriteStrClientPrefix(Client, target, "JOIN :%s", channame))
 221                 return false;
 222
 223         /* Send topic to client, if any */
 224         topic = Channel_Topic(chan);
 225         assert(topic != NULL);
 226         if (*topic) {
 227                 if (!IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
 228                         Client_ID(Client), channame, topic))
 229                                 return false;
 230 #ifndef STRICT_RFC
 231                 if (!IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
 232                         Client_ID(Client), channame,
 233                         Channel_TopicWho(chan),
 234                         Channel_TopicTime(chan)))
 235                                 return false;
 236 #endif
 237         }
 238         /* send list of channel members to client */
 239         if (!IRC_Send_NAMES(Client, chan))
 240                 return false;
 241         return IRC_WriteStrClient(Client, RPL_ENDOFNAMES_MSG, Client_ID(Client), Channel_Name(chan));
 242 }
 243
 244
 245 GLOBAL bool
 246 IRC_JOIN( CLIENT *Client, REQUEST *Req )
 247 {
 248         char *channame, *key = NULL, *flags, *lastkey = NULL, *lastchan = NULL;
 249         CLIENT *target;
 250         CHANNEL *chan;
 251
 252         assert( Client != NULL );
 253         assert( Req != NULL );
 254
 255         /* Bad number of arguments? */
 256         if (Req->argc < 1 || Req->argc > 2)
 257                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 258                                           Client_ID(Client), Req->command);
 259
 260         /* Who is the sender? */
 261         if (Client_Type(Client) == CLIENT_SERVER)
 262                 target = Client_Search(Req->prefix);
 263         else
 264                 target = Client;
 265
 266         if (!target)
 267                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix);
 268
 269         /* Is argument "0"? */
 270         if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
 271                 return part_from_all_channels(Client, target);
 272
 273         /* Are channel keys given? */
 274         if (Req->argc > 1)
 275                 key = strtok_r(Req->argv[1], ",", &lastkey);
 276
 277         channame = Req->argv[0];
 278         channame = strtok_r(channame, ",", &lastchan);
 279
 280         /* Make sure that "channame" is not the empty string ("JOIN :") */
 281         if (! channame)
 282                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 283                                           Client_ID(Client), Req->command);
 284
 285         while (channame) {
 286                 flags = NULL;
 287
 288                 /* Did the server include channel-user-modes? */
 289                 if (Client_Type(Client) == CLIENT_SERVER) {
 290                         flags = strchr(channame, 0x7);
 291                         if (flags) {
 292                                 *flags = '\0';
 293                                 flags++;
 294                         }
 295                 }
 296
 297                 chan = Channel_Search(channame);
 298                 if (!chan && Conf_PredefChannelsOnly) {
 299                          /* channel must be created, but server does not allow this */
 300                         IRC_WriteStrClient(Client, ERR_BANNEDFROMCHAN_MSG, Client_ID(Client), channame);
 301                         break;
 302                 }
 303
 304                 /* Local client? */
 305                 if (Client_Type(Client) == CLIENT_USER) {
 306                         /* Test if the user has reached the channel limit */
 307                         if ((Conf_MaxJoins > 0) &&
 308                             (Channel_CountForUser(Client) >= Conf_MaxJoins))
 309                                 return IRC_WriteStrClient(Client,
 310                                                 ERR_TOOMANYCHANNELS_MSG,
 311                                                 Client_ID(Client), channame);
 312                         if (chan) {
 313                                 /* Already existing channel: check if the
 314                                  * client is allowed to join */
 315                                 if (!join_allowed(Client, chan, channame, key))
 316                                         break;
 317                         } else {
 318                                 /* New channel: first user will become channel
 319                                  * operator unless this is a modeless channel */
 320                                 if (*channame != '+')
 321                                         flags = "o";
 322                         }
 323
 324                         /* Local client: update idle time */
 325                         Conn_UpdateIdle(Client_Conn(Client));
 326                 } else {
 327                         /* Remote server: we don't need to know whether the
 328                          * client is invited or not, but we have to make sure
 329                          * that the "one shot" entries (generated by INVITE
 330                          * commands) in this list become deleted when a user
 331                          * joins a channel this way. */
 332                         if (chan)
 333                                 (void)Lists_Check(Channel_GetListInvites(chan),
 334                                                   target);
 335                 }
 336
 337                 /* Join channel (and create channel if it doesn't exist) */
 338                 if (!Channel_Join(target, channame))
 339                         break;
 340
 341                 if (!chan) { /* channel is new; it has been created above */
 342                         chan = Channel_Search(channame);
 343                         assert(chan != NULL);
 344                         if (Channel_IsModeless(chan)) {
 345                                 Channel_ModeAdd(chan, 't'); /* /TOPIC not allowed */
 346                                 Channel_ModeAdd(chan, 'n'); /* no external msgs */
 347                         }
 348                 }
 349                 assert(chan != NULL);
 350
 351                 join_set_channelmodes(chan, target, flags);
 352
 353                 join_forward(Client, target, chan, channame);
 354
 355                 if (!join_send_topic(Client, target, chan, channame))
 356                         break; /* write error */
 357
 358                 /* next channel? */
 359                 channame = strtok_r(NULL, ",", &lastchan);
 360                 if (channame && key)
 361                         key = strtok_r(NULL, ",", &lastkey);
 362         }
 363         return CONNECTED;
 364 } /* IRC_JOIN */
 365
 366
 367 /**
 368  * Handler for the IRC "PART" command.
 369  */
 370 GLOBAL bool
 371 IRC_PART(CLIENT * Client, REQUEST * Req)
 372 {
 373         CLIENT *target;
 374         char *chan;
 375
 376         assert(Client != NULL);
 377         assert(Req != NULL);
 378
 379         if (Req->argc < 1 || Req->argc > 2)
 380                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 381                                           Client_ID(Client), Req->command);
 382
 383         /* Get the sender */
 384         if (Client_Type(Client) == CLIENT_SERVER)
 385                 target = Client_Search(Req->prefix);
 386         else
 387                 target = Client;
 388         if (!target)
 389                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 390                                           Client_ID(Client), Req->prefix);
 391
 392         /* Loop over all the given channel names */
 393         chan = strtok(Req->argv[0], ",");
 394
 395         /* Make sure that "chan" is not the empty string ("PART :") */
 396         if (! chan)
 397                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 398                                           Client_ID(Client), Req->command);
 399
 400         while (chan) {
 401                 Channel_Part(target, Client, chan,
 402                              Req->argc > 1 ? Req->argv[1] : Client_ID(target));
 403                 chan = strtok(NULL, ",");
 404         }
 405
 406         /* Update idle time, if local client */
 407         if (Client_Conn(Client) > NONE)
 408                 Conn_UpdateIdle(Client_Conn(Client));
 409
 410         return CONNECTED;
 411 } /* IRC_PART */
 412
 413
 414 GLOBAL bool
 415 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 416 {
 417         CHANNEL *chan;
 418         CLIENT *from;
 419         char *topic;
 420         bool onchannel, topicok, use_servermode, r;
 421
 422         assert( Client != NULL );
 423         assert( Req != NULL );
 424
 425         if (Req->argc < 1 || Req->argc > 2)
 426                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 427                                           Client_ID(Client), Req->command);
 428
 429         if (Client_Type(Client) == CLIENT_SERVER)
 430                 from = Client_Search(Req->prefix);
 431         else
 432                 from = Client;
 433
 434         if (!from)
 435                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 436                                           Client_ID(Client), Req->prefix);
 437
 438         chan = Channel_Search(Req->argv[0]);
 439         if (!chan)
 440                 return IRC_WriteStrClient(from, ERR_NOSUCHCHANNEL_MSG,
 441                                           Client_ID(from), Req->argv[0]);
 442
 443         Channel_CheckAdminRights(chan, Client, from,
 444                                  &onchannel, &topicok, &use_servermode);
 445
 446         if (!onchannel && !topicok)
 447                 return IRC_WriteStrClient(from, ERR_NOTONCHANNEL_MSG,
 448                                           Client_ID(from), Req->argv[0]);
 449
 450         if (Req->argc == 1) {
 451                 /* Request actual topic */
 452                 topic = Channel_Topic(chan);
 453                 if (*topic) {
 454                         r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
 455                                                Client_ID(Client),
 456                                                Channel_Name(chan), topic);
 457 #ifndef STRICT_RFC
 458                         r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
 459                                                Client_ID(Client),
 460                                                Channel_Name(chan),
 461                                                Channel_TopicWho(chan),
 462                                                Channel_TopicTime(chan));
 463 #endif
 464                         return r;
 465                 }
 466                 else
 467                         return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
 468                                                   Client_ID(from),
 469                                                   Channel_Name(chan));
 470         }
 471
 472         if (strchr(Channel_Modes(chan), 't')) {
 473                 /* Topic Lock. Is the user a channel or IRC operator? */
 474                 if (!topicok)
 475                         return IRC_WriteStrClient(from, ERR_CHANOPRIVSNEEDED_MSG,
 476                                                   Client_ID(from),
 477                                                   Channel_Name(chan));
 478         }
 479
 480         /* Set new topic */
 481         Channel_SetTopic(chan, from, Req->argv[1]);
 482         LogDebug("%s \"%s\" set topic on \"%s\": %s",
 483                  Client_TypeText(from), Client_Mask(from), Channel_Name(chan),
 484                  Req->argv[1][0] ? Req->argv[1] : "<none>");
 485
 486         if (use_servermode)
 487                 from = Client_ThisServer();
 488
 489         /* Update channel and forward new topic to other servers */
 490         if (!Channel_IsLocal(chan))
 491                 IRC_WriteStrServersPrefix(Client, from, "TOPIC %s :%s",
 492                                           Req->argv[0], Req->argv[1]);
 493         IRC_WriteStrChannelPrefix(Client, chan, from, false, "TOPIC %s :%s",
 494                                   Req->argv[0], Req->argv[1]);
 495
 496         if (Client_Type(Client) == CLIENT_USER)
 497                 return IRC_WriteStrClientPrefix(Client, Client, "TOPIC %s :%s",
 498                                                 Req->argv[0], Req->argv[1]);
 499         else
 500                 return CONNECTED;
 501 } /* IRC_TOPIC */
 502
 503
 504 /**
 505  * Handler for the IRC "LIST" command.
 506  * This implementation handles the local case as well as the forwarding of the
 507  * LIST command to other servers in the IRC network.
 508  */
 509 GLOBAL bool
 510 IRC_LIST( CLIENT *Client, REQUEST *Req )
 511 {
 512         char *pattern;
 513         CHANNEL *chan;
 514         CLIENT *from, *target;
 515
 516         assert( Client != NULL );
 517         assert( Req != NULL );
 518
 519         /* Bad number of prameters? */
 520         if( Req->argc > 2 )
 521                 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
 522                         Client_ID( Client ), Req->command );
 523
 524         if( Req->argc > 0 )
 525                 pattern = strtok( Req->argv[0], "," );
 526         else
 527                 pattern = "*";
 528
 529         /* Get sender from prefix, if any */
 530         if( Client_Type( Client ) == CLIENT_SERVER )
 531                 from = Client_Search( Req->prefix );
 532         else
 533                 from = Client;
 534
 535         if( ! from )
 536                 return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG,
 537                                 Client_ID( Client ), Req->prefix );
 538
 539         if( Req->argc == 2 )
 540         {
 541                 /* Forward to other server? */
 542                 target = Client_Search( Req->argv[1] );
 543                 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
 544                         return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG,
 545                                         Client_ID( Client ), Req->argv[1] );
 546
 547                 if( target != Client_ThisServer( ))
 548                 {
 549                         /* Target is indeed an other server, forward it! */
 550                         return IRC_WriteStrClientPrefix( target, from,
 551                                         "LIST %s :%s", Client_ID( from ),
 552                                         Req->argv[1] );
 553                 }
 554         }
 555
 556         while( pattern )
 557         {
 558                 /* Loop through all the channels */
 559                 chan = Channel_First( );
 560                 while( chan )
 561                 {
 562                         /* Check search pattern */
 563                         if( Match( pattern, Channel_Name( chan )))
 564                         {
 565                                 /* Gotcha! */
 566                                 if( ! strchr( Channel_Modes( chan ), 's' ) ||
 567                                     Channel_IsMemberOf( chan, from ))
 568                                 {
 569                                         if( ! IRC_WriteStrClient( from,
 570                                             RPL_LIST_MSG, Client_ID( from ),
 571                                             Channel_Name( chan ),
 572                                             Channel_MemberCount( chan ),
 573                                             Channel_Topic( chan )))
 574                                                 return DISCONNECTED;
 575                                 }
 576                         }
 577                         chan = Channel_Next( chan );
 578                 }
 579
 580                 /* Get next name ... */
 581                 if( Req->argc > 0 )
 582                         pattern = strtok( NULL, "," );
 583                 else
 584                         pattern = NULL;
 585         }
 586
 587         return IRC_WriteStrClient( from, RPL_LISTEND_MSG, Client_ID( from ));
 588 } /* IRC_LIST */
 589
 590
 591 GLOBAL bool
 592 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 593 {
 594         char modes_add[COMMAND_LEN], l[16], *ptr;
 595         CLIENT *from;
 596         CHANNEL *chan;
 597         int arg_topic;
 598
 599         assert( Client != NULL );
 600         assert( Req != NULL );
 601
 602         /* Bad number of parameters? */
 603         if(( Req->argc < 2 ) || ( Req->argc == 4 ) || ( Req->argc > 5 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 604
 605         /* Compatibility kludge */
 606         if( Req->argc == 5 ) arg_topic = 4;
 607         else if( Req->argc == 3 ) arg_topic = 2;
 608         else arg_topic = -1;
 609
 610         /* Search origin */
 611         from = Client_Search( Req->prefix );
 612         if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 613
 614         /* Search or create channel */
 615         chan = Channel_Search( Req->argv[0] );
 616         if( ! chan ) chan = Channel_Create( Req->argv[0] );
 617         if( ! chan ) return CONNECTED;
 618
 619         if( Req->argv[1][0] == '+' )
 620         {
 621                 ptr = Channel_Modes( chan );
 622                 if( ! *ptr )
 623                 {
 624                         /* OK, this channel doesn't have modes jet, set the received ones: */
 625                         Channel_SetModes( chan, &Req->argv[1][1] );
 626
 627                         if( Req->argc == 5 )
 628                         {
 629                                 if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
 630                                 if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
 631                         }
 632                         else
 633                         {
 634                                 /* Delete modes which we never want to inherit */
 635                                 Channel_ModeDel( chan, 'l' );
 636                                 Channel_ModeDel( chan, 'k' );
 637                         }
 638
 639                         strcpy( modes_add, "" );
 640                         ptr = Channel_Modes( chan );
 641                         while( *ptr )
 642                         {
 643                                 if( *ptr == 'l' )
 644                                 {
 645                                         snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
 646                                         strlcat( modes_add, l, sizeof( modes_add ));
 647                                 }
 648                                 if( *ptr == 'k' )
 649                                 {
 650                                         strlcat( modes_add, " ", sizeof( modes_add ));
 651                                         strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
 652                                 }
 653                                 ptr++;
 654                         }
 655
 656                         /* Inform members of this channel */
 657                         IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
 658                 }
 659         }
 660         else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
 661
 662         if( arg_topic > 0 )
 663         {
 664                 /* We got a topic */
 665                 ptr = Channel_Topic( chan );
 666                 if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
 667                 {
 668                         /* OK, there is no topic jet */
 669                         Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 670                         IRC_WriteStrChannelPrefix(Client, chan, from, false,
 671                              "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
 672                 }
 673         }
 674
 675         /* Forward CHANINFO to other serevrs */
 676         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] );
 677         else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
 678         else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
 679
 680         return CONNECTED;
 681 } /* IRC_CHANINFO */
 682
 683
 684 /* -eof- */