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