2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
5 * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
6 * der GNU General Public License (GPL), wie von der Free Software Foundation
7 * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
8 * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
9 * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
10 * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
12 * $Id: channel.c,v 1.21 2002/04/23 19:51:31 alex Exp $
14 * channel.c: Management der Channels
30 #include "irc-write.h"
38 LOCAL CHANNEL *My_Channels;
39 LOCAL CL2CHAN *My_Cl2Chan;
42 LOCAL CHANNEL *New_Chan( CHAR *Name );
43 LOCAL CL2CHAN *Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client );
44 LOCAL CL2CHAN *Add_Client( CHANNEL *Chan, CLIENT *Client );
45 LOCAL BOOLEAN Remove_Client( CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN ServerPART );
46 LOCAL CL2CHAN *Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan );
47 LOCAL CL2CHAN *Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan );
48 LOCAL BOOLEAN Delete_Channel( CHANNEL *Chan );
51 GLOBAL VOID Channel_Init( VOID )
58 GLOBAL VOID Channel_Exit( VOID )
61 CL2CHAN *cl2chan, *cl2chan_next;
63 /* Channel-Strukturen freigeben */
72 /* Channel-Zuordnungstabelle freigeben */
76 cl2chan_next = cl2chan->next;
78 cl2chan = cl2chan_next;
83 GLOBAL BOOLEAN Channel_Join( CLIENT *Client, CHAR *Name )
87 assert( Client != NULL );
88 assert( Name != NULL );
90 /* Valider Channel-Name? */
91 if( ! Channel_IsValidName( Name ))
93 IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
98 chan = Channel_Search( Name );
101 /* Ist der Client bereits Mitglied? */
102 if( Get_Cl2Chan( chan, Client )) return FALSE;
106 /* Gibt es noch nicht? Dann neu anlegen: */
107 chan = New_Chan( Name );
108 if( ! chan ) return FALSE;
111 chan->next = My_Channels;
115 /* User dem Channel hinzufuegen */
116 if( ! Add_Client( chan, Client )) return FALSE;
121 GLOBAL BOOLEAN Channel_Part( CLIENT *Client, CLIENT *Origin, CHAR *Name, CHAR *Reason )
125 assert( Client != NULL );
126 assert( Name != NULL );
129 chan = Channel_Search( Name );
130 if(( ! chan ) || ( ! Get_Cl2Chan( chan, Client )))
132 IRC_WriteStrClient( Client, ERR_NOSUCHCHANNEL_MSG, Client_ID( Client ), Name );
136 /* User aus Channel entfernen */
137 if( ! Remove_Client( chan, Client, Origin, Reason, TRUE )) return FALSE;
142 GLOBAL VOID Channel_RemoveClient( CLIENT *Client, CHAR *Reason )
146 assert( Client != NULL );
152 Remove_Client( c, Client, Client_ThisServer( ), Reason, FALSE );
155 } /* Channel_RemoveClient */
158 GLOBAL INT Channel_Count( VOID )
171 } /* Channel_Count */
174 GLOBAL INT Channel_MemberCount( CHANNEL *Chan )
179 assert( Chan != NULL );
182 cl2chan = My_Cl2Chan;
185 if( cl2chan->channel == Chan ) count++;
186 cl2chan = cl2chan->next;
189 } /* Channel_MemberCount */
192 GLOBAL CHAR *Channel_Name( CHANNEL *Chan )
194 assert( Chan != NULL );
199 GLOBAL CHAR *Channel_Modes( CHANNEL *Chan )
201 assert( Chan != NULL );
203 } /* Channel_Modes */
206 GLOBAL CHANNEL *Channel_First( VOID )
209 } /* Channel_First */
212 GLOBAL CHANNEL *Channel_Next( CHANNEL *Chan )
214 assert( Chan != NULL );
219 GLOBAL CHANNEL *Channel_Search( CHAR *Name )
221 /* Channel-Struktur suchen */
226 assert( Name != NULL );
228 search_hash = Hash( Name );
232 if( search_hash == c->hash )
234 /* lt. Hash-Wert: Treffer! */
235 if( strcasecmp( Name, c->name ) == 0 ) return c;
240 } /* Channel_Search */
243 GLOBAL CL2CHAN *Channel_FirstMember( CHANNEL *Chan )
245 assert( Chan != NULL );
246 return Get_First_Cl2Chan( NULL, Chan );
247 } /* Channel_FirstMember */
250 GLOBAL CL2CHAN *Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
252 assert( Chan != NULL );
253 assert( Cl2Chan != NULL );
254 return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
255 } /* Channel_NextMember */
258 GLOBAL CL2CHAN *Channel_FirstChannelOf( CLIENT *Client )
260 assert( Client != NULL );
261 return Get_First_Cl2Chan( Client, NULL );
262 } /* Channel_FirstChannelOf */
265 GLOBAL CL2CHAN *Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
267 assert( Client != NULL );
268 assert( Cl2Chan != NULL );
269 return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
270 } /* Channel_NextChannelOf */
273 GLOBAL CLIENT *Channel_GetClient( CL2CHAN *Cl2Chan )
275 assert( Cl2Chan != NULL );
276 return Cl2Chan->client;
277 } /* Channel_GetClient */
280 GLOBAL CHANNEL *Channel_GetChannel( CL2CHAN *Cl2Chan )
282 assert( Cl2Chan != NULL );
283 return Cl2Chan->channel;
284 } /* Channel_GetChannel */
287 GLOBAL BOOLEAN Channel_IsValidName( CHAR *Name )
289 /* Pr
\9ffen, ob Name als Channelname gueltig */
291 CHAR *ptr, badchars[] = " ,:\x07";
293 assert( Name != NULL );
295 if(( Name[0] != '#' ) || ( strlen( Name ) >= CHANNEL_NAME_LEN )) return FALSE;
300 if( strchr( badchars, *ptr )) return FALSE;
305 } /* Channel_IsValidName */
308 GLOBAL BOOLEAN Channel_ModeAdd( CHANNEL *Chan, CHAR Mode )
310 /* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
311 * Mode neu gesetzt wurde, FALSE, wenn der Channel den Mode
316 assert( Chan != NULL );
318 x[0] = Mode; x[1] = '\0';
319 if( ! strchr( Chan->modes, x[0] ))
321 /* Client hat den Mode noch nicht -> setzen */
322 strcat( Chan->modes, x );
326 } /* Channel_ModeAdd */
329 GLOBAL BOOLEAN Channel_ModeDel( CHANNEL *Chan, CHAR Mode )
331 /* Mode soll geloescht werden. TRUE wird geliefert, wenn der
332 * Mode entfernt wurde, FALSE, wenn der Channel den Mode
333 * ueberhaupt nicht hatte. */
337 assert( Chan != NULL );
339 x[0] = Mode; x[1] = '\0';
341 p = strchr( Chan->modes, x[0] );
342 if( ! p ) return FALSE;
344 /* Client hat den Mode -> loeschen */
351 } /* Channel_ModeDel */
354 GLOBAL BOOLEAN Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
356 /* Channel-User-Mode soll gesetzt werden. TRUE wird geliefert,
357 * wenn der Mode neu gesetzt wurde, FALSE, wenn der User den
358 * Channel-Mode bereits hatte. */
363 assert( Chan != NULL );
364 assert( Client != NULL );
366 cl2chan = Get_Cl2Chan( Chan, Client );
367 assert( cl2chan != NULL );
369 x[0] = Mode; x[1] = '\0';
370 if( ! strchr( cl2chan->modes, x[0] ))
372 /* Client hat den Mode noch nicht -> setzen */
373 strcat( cl2chan->modes, x );
377 } /* Channel_UserModeAdd */
380 GLOBAL BOOLEAN Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, CHAR Mode )
382 /* Channel-User-Mode soll geloescht werden. TRUE wird geliefert,
383 * wenn der Mode entfernt wurde, FALSE, wenn der User den Channel-Mode
384 * ueberhaupt nicht hatte. */
389 assert( Chan != NULL );
390 assert( Client != NULL );
392 cl2chan = Get_Cl2Chan( Chan, Client );
393 assert( cl2chan != NULL );
395 x[0] = Mode; x[1] = '\0';
397 p = strchr( cl2chan->modes, x[0] );
398 if( ! p ) return FALSE;
400 /* Client hat den Mode -> loeschen */
407 } /* Channel_UserModeDel */
410 GLOBAL CHAR *Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
412 /* Channel-Modes eines Users liefern */
416 assert( Chan != NULL );
417 assert( Client != NULL );
419 cl2chan = Get_Cl2Chan( Chan, Client );
420 assert( cl2chan != NULL );
422 return cl2chan->modes;
423 } /* Channel_UserModes */
426 GLOBAL BOOLEAN Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
428 /* Pruefen, ob Client Mitglied in Channel ist */
430 assert( Chan != NULL );
431 assert( Client != NULL );
433 if( Get_Cl2Chan( Chan, Client )) return TRUE;
435 } /* Channel_IsMemberOf */
438 GLOBAL CHAR *Channel_Topic( CHANNEL *Chan )
440 assert( Chan != NULL );
442 } /* Channel_Topic */
445 GLOBAL VOID Channel_SetTopic( CHANNEL *Chan, CHAR *Topic )
447 assert( Chan != NULL );
448 assert( Topic != NULL );
450 strncpy( Chan->topic, Topic, CHANNEL_TOPIC_LEN - 1 );
451 Chan->topic[CHANNEL_TOPIC_LEN - 1] = '\0';
452 } /* Channel_SetTopic */
455 GLOBAL BOOLEAN Channel_Write( CHANNEL *Chan, CLIENT *From, CLIENT *Client, CHAR *Text )
457 BOOLEAN is_member, has_voice, is_op, ok;
459 /* Okay, Ziel ist ein Channel */
460 is_member = has_voice = is_op = FALSE;
461 if( Channel_IsMemberOf( Chan, From ))
464 if( strchr( Channel_UserModes( Chan, From ), 'v' )) has_voice = TRUE;
465 if( strchr( Channel_UserModes( Chan, From ), 'o' )) is_op = TRUE;
468 /* pruefen, ob Client in Channel schreiben darf */
470 if( strchr( Channel_Modes( Chan ), 'n' ) && ( ! is_member )) ok = FALSE;
471 if( strchr( Channel_Modes( Chan ), 'm' ) && ( ! is_op ) && ( ! has_voice )) ok = FALSE;
473 if( ! ok ) return IRC_WriteStrClient( From, ERR_CANNOTSENDTOCHAN_MSG, Client_ID( From ), Channel_Name( Chan ));
476 if( Client_Conn( From ) > NONE ) Conn_UpdateIdle( Client_Conn( From ));
477 return IRC_WriteStrChannelPrefix( Client, Chan, From, TRUE, "PRIVMSG %s :%s", Channel_Name( Chan ), Text );
478 } /* Channel_Write */
482 LOCAL CHANNEL *New_Chan( CHAR *Name )
484 /* Neue Channel-Struktur anlegen */
488 assert( Name != NULL );
490 c = malloc( sizeof( CHANNEL ));
493 Log( LOG_EMERG, "Can't allocate memory!" );
497 strncpy( c->name, Name, CHANNEL_NAME_LEN - 1 );
498 c->name[CHANNEL_NAME_LEN - 1] = '\0';
499 strcpy( c->modes, "" );
500 strcpy( c->topic, "" );
501 c->hash = Hash( c->name );
503 Log( LOG_DEBUG, "Created new channel structure for \"%s\".", Name );
509 LOCAL CL2CHAN *Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
513 assert( Chan != NULL );
514 assert( Client != NULL );
516 cl2chan = My_Cl2Chan;
519 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
520 cl2chan = cl2chan->next;
526 LOCAL CL2CHAN *Add_Client( CHANNEL *Chan, CLIENT *Client )
530 assert( Chan != NULL );
531 assert( Client != NULL );
533 /* neue CL2CHAN-Struktur anlegen */
534 cl2chan = malloc( sizeof( CL2CHAN ));
537 Log( LOG_EMERG, "Can't allocate memory!" );
540 cl2chan->channel = Chan;
541 cl2chan->client = Client;
542 strcpy( cl2chan->modes, "" );
545 cl2chan->next = My_Cl2Chan;
546 My_Cl2Chan = cl2chan;
548 Log( LOG_DEBUG, "User \"%s\" joined channel \"%s\".", Client_Mask( Client ), Chan->name );
554 LOCAL BOOLEAN Remove_Client( CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, CHAR *Reason, BOOLEAN ServerPART )
556 CL2CHAN *cl2chan, *last_cl2chan;
559 assert( Chan != NULL );
560 assert( Client != NULL );
561 assert( Origin != NULL );
562 assert( Reason != NULL );
565 cl2chan = My_Cl2Chan;
568 if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
569 last_cl2chan = cl2chan;
570 cl2chan = cl2chan->next;
572 if( ! cl2chan ) return FALSE;
574 c = cl2chan->channel;
577 /* Aus Verkettung loesen und freigeben */
578 if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
579 else My_Cl2Chan = cl2chan->next;
582 if( ServerPART ) IRC_WriteStrServersPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
583 IRC_WriteStrChannelPrefix( Origin, c, Client, FALSE, "PART %s :%s", c->name, Reason );
584 if(( Client_Conn( Origin ) > NONE ) && ( Client_Type( Origin ) == CLIENT_USER )) IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason );
586 Log( LOG_DEBUG, "User \"%s\" left channel \"%s\" (%s).", Client_Mask( Client ), c->name, Reason );
588 /* Wenn Channel nun leer: loeschen */
589 if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
592 } /* Remove_Client */
595 LOCAL CL2CHAN *Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
597 return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
598 } /* Get_First_Cl2Chan */
601 LOCAL CL2CHAN *Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
605 assert( Client != NULL || Channel != NULL );
610 if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
611 if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
612 cl2chan = cl2chan->next;
615 } /* Get_Next_Cl2Chan */
618 LOCAL BOOLEAN Delete_Channel( CHANNEL *Chan )
620 /* Channel-Struktur loeschen */
622 CHANNEL *chan, *last_chan;
628 if( chan == Chan ) break;
632 if( ! chan ) return FALSE;
634 Log( LOG_DEBUG, "Freed channel structure for \"%s\".", Chan->name );
636 /* Neu verketten und freigeben */
637 if( last_chan ) last_chan->next = chan->next;
638 else My_Channels = chan->next;
642 } /* Delete_Channel */