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