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