2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
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.
20 static char UNUSED id[] = "$Id: client.c,v 1.66 2002/12/19 04:33:27 alex Exp $";
41 #include "irc-write.h"
48 #define GETID_LEN (CLIENT_NICK_LEN-1) + 1 + (CLIENT_USER_LEN-1) + 1 + (CLIENT_HOST_LEN-1) + 1
51 LOCAL CLIENT *This_Server, *My_Clients;
52 LOCAL CHAR GetID_Buffer[GETID_LEN];
55 LOCAL LONG Count PARAMS(( CLIENT_TYPE Type ));
56 LOCAL LONG MyCount PARAMS(( CLIENT_TYPE Type ));
58 LOCAL CLIENT *New_Client_Struct PARAMS(( VOID ));
59 LOCAL VOID Generate_MyToken PARAMS(( CLIENT *Client ));
67 This_Server = New_Client_Struct( );
70 Log( LOG_EMERG, "Can't allocate client structure for server! Going down." );
71 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE );
75 /* Client-Struktur dieses Servers */
76 This_Server->next = NULL;
77 This_Server->type = CLIENT_SERVER;
78 This_Server->conn_id = NONE;
79 This_Server->introducer = This_Server;
80 This_Server->mytoken = 1;
81 This_Server->hops = 0;
83 gethostname( This_Server->host, CLIENT_HOST_LEN );
84 h = gethostbyname( This_Server->host );
85 if( h ) strcpy( This_Server->host, h->h_name );
87 Client_SetID( This_Server, Conf_ServerName );
88 Client_SetInfo( This_Server, Conf_ServerInfo );
90 My_Clients = This_Server;
100 if( NGIRCd_SignalRestart ) Client_Destroy( This_Server, "Server going down (restarting).", NULL, FALSE );
101 else Client_Destroy( This_Server, "Server going down.", NULL, FALSE );
108 next = (CLIENT *)c->next;
112 if( cnt ) Log( LOG_INFO, "Freed %d client structure%s.", cnt, cnt == 1 ? "" : "s" );
117 Client_ThisServer( VOID )
120 } /* Client_ThisServer */
124 Client_NewLocal( CONN_ID Idx, CHAR *Hostname, INT Type, BOOLEAN Idented )
126 /* Neuen lokalen Client erzeugen: Wrapper-Funktion fuer Client_New(). */
127 return Client_New( Idx, This_Server, NULL, Type, NULL, NULL, Hostname, NULL, 0, 0, NULL, Idented );
128 } /* Client_NewLocal */
132 Client_NewRemoteServer( CLIENT *Introducer, CHAR *Hostname, CLIENT *TopServer, INT Hops, INT Token, CHAR *Info, BOOLEAN Idented )
134 /* Neuen Remote-Client erzeugen: Wrapper-Funktion fuer Client_New (). */
135 return Client_New( NONE, Introducer, TopServer, CLIENT_SERVER, Hostname, NULL, Hostname, Info, Hops, Token, NULL, Idented );
136 } /* Client_NewRemoteServer */
140 Client_NewRemoteUser( CLIENT *Introducer, CHAR *Nick, INT Hops, CHAR *User, CHAR *Hostname, INT Token, CHAR *Modes, CHAR *Info, BOOLEAN Idented )
142 /* Neuen Remote-Client erzeugen: Wrapper-Funktion fuer Client_New (). */
143 return Client_New( NONE, Introducer, NULL, CLIENT_USER, Nick, User, Hostname, Info, Hops, Token, Modes, Idented );
144 } /* Client_NewRemoteUser */
148 Client_New( CONN_ID Idx, CLIENT *Introducer, CLIENT *TopServer, INT Type, CHAR *ID, CHAR *User, CHAR *Hostname, CHAR *Info, INT Hops, INT Token, CHAR *Modes, BOOLEAN Idented )
152 assert( Idx >= NONE );
153 assert( Introducer != NULL );
154 assert( Hostname != NULL );
156 client = New_Client_Struct( );
157 if( ! client ) return NULL;
160 client->conn_id = Idx;
161 client->introducer = Introducer;
162 client->topserver = TopServer;
164 if( ID ) Client_SetID( client, ID );
165 if( User ) Client_SetUser( client, User, Idented );
166 if( Hostname ) Client_SetHostname( client, Hostname );
167 if( Info ) Client_SetInfo( client, Info );
169 client->token = Token;
170 if( Modes ) Client_SetModes( client, Modes );
171 if( Type == CLIENT_SERVER ) Generate_MyToken( client );
173 /* ist der User away? */
174 if( strchr( client->modes, 'a' )) strcpy( client->away, DEFAULT_AWAY_MSG );
177 client->next = (POINTER *)My_Clients;
185 Client_Destroy( CLIENT *Client, CHAR *LogMsg, CHAR *FwdMsg, BOOLEAN SendQuit )
187 /* Client entfernen. */
190 CHAR msg[LINE_LEN], *txt;
192 assert( Client != NULL );
194 if( LogMsg ) txt = LogMsg;
196 if( ! txt ) txt = "Reason unknown.";
198 /* Netz-Split-Nachricht vorbereiten (noch nicht optimal) */
199 if( Client->type == CLIENT_SERVER ) sprintf( msg, "%s: lost server %s", This_Server->id, Client->id );
205 if(( Client->type == CLIENT_SERVER ) && ( c->introducer == Client ) && ( c != Client ))
207 /* der Client, der geloescht wird ist ein Server. Der Client, den wir gerade
208 * pruefen, ist ein Child von diesem und muss daher auch entfernt werden */
209 Client_Destroy( c, NULL, msg, FALSE );
216 /* Wir haben den Client gefunden: entfernen */
217 if( last ) last->next = c->next;
218 else My_Clients = (CLIENT *)c->next;
220 if( c->type == CLIENT_USER )
222 if( c->conn_id != NONE )
224 /* Ein lokaler User */
225 Log( LOG_NOTICE, "User \"%s\" unregistered (connection %d): %s", Client_Mask( c ), c->conn_id, txt );
229 /* Alle andere Server informieren! */
230 if( FwdMsg ) IRC_WriteStrServersPrefix( NULL, c, "QUIT :%s", FwdMsg );
231 else IRC_WriteStrServersPrefix( NULL, c, "QUIT :" );
237 Log( LOG_DEBUG, "User \"%s\" unregistered: %s", Client_Mask( c ), txt );
241 /* Andere Server informieren, ausser denen, die "in
242 * Richtung dem liegen", auf dem der User registriert
243 * ist. Von denen haben wir das QUIT ja wohl bekommen. */
244 if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "QUIT :%s", FwdMsg );
245 else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "QUIT :" );
248 Channel_Quit( c, FwdMsg ? FwdMsg : c->id );
250 else if( c->type == CLIENT_SERVER )
252 if( c != This_Server )
254 if( c->conn_id != NONE ) Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
255 else Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered: %s", c->id, txt );
258 /* andere Server informieren */
259 if( ! NGIRCd_SignalQuit )
261 if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :%s", c->id, FwdMsg );
262 else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :", c->id );
267 if( c->conn_id != NONE )
269 if( c->id[0] ) Log( LOG_NOTICE, "Client \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
270 else Log( LOG_NOTICE, "Client unregistered (connection %d): %s", c->conn_id, txt );
274 if( c->id[0] ) Log( LOG_WARNING, "Unregistered unknown client \"%s\": %s", c->id, txt );
275 else Log( LOG_WARNING, "Unregistered unknown client: %s", c->id, txt );
283 c = (CLIENT *)c->next;
285 } /* Client_Destroy */
289 Client_SetHostname( CLIENT *Client, CHAR *Hostname )
291 /* Hostname eines Clients setzen */
293 assert( Client != NULL );
294 assert( Hostname != NULL );
296 strncpy( Client->host, Hostname, CLIENT_HOST_LEN - 1 );
297 Client->host[CLIENT_HOST_LEN - 1] = '\0';
298 } /* Client_SetHostname */
302 Client_SetID( CLIENT *Client, CHAR *ID )
304 /* Hostname eines Clients setzen, Hash-Wert berechnen */
306 assert( Client != NULL );
307 assert( ID != NULL );
309 strncpy( Client->id, ID, CLIENT_ID_LEN - 1 );
310 Client->id[CLIENT_ID_LEN - 1] = '\0';
313 Client->hash = Hash( Client->id );
318 Client_SetUser( CLIENT *Client, CHAR *User, BOOLEAN Idented )
320 /* Username eines Clients setzen */
322 assert( Client != NULL );
323 assert( User != NULL );
325 if( Idented ) strncpy( Client->user, User, CLIENT_USER_LEN - 1 );
328 Client->user[0] = '~';
329 strncpy( Client->user + 1, User, CLIENT_USER_LEN - 2 );
331 Client->user[CLIENT_USER_LEN - 1] = '\0';
332 } /* Client_SetUser */
336 Client_SetInfo( CLIENT *Client, CHAR *Info )
338 /* Hostname eines Clients setzen */
340 assert( Client != NULL );
341 assert( Info != NULL );
343 strncpy( Client->info, Info, CLIENT_INFO_LEN - 1 );
344 Client->info[CLIENT_INFO_LEN - 1] = '\0';
345 } /* Client_SetInfo */
349 Client_SetModes( CLIENT *Client, CHAR *Modes )
351 /* Modes eines Clients setzen */
353 assert( Client != NULL );
354 assert( Modes != NULL );
356 strncpy( Client->modes, Modes, CLIENT_MODE_LEN - 1 );
357 Client->modes[CLIENT_MODE_LEN - 1] = '\0';
358 } /* Client_SetModes */
362 Client_SetFlags( CLIENT *Client, CHAR *Flags )
364 /* Flags eines Clients setzen */
366 assert( Client != NULL );
367 assert( Flags != NULL );
369 strncpy( Client->flags, Flags, CLIENT_FLAGS_LEN - 1 );
370 Client->flags[CLIENT_FLAGS_LEN - 1] = '\0';
371 } /* Client_SetFlags */
375 Client_SetPassword( CLIENT *Client, CHAR *Pwd )
377 /* Von einem Client geliefertes Passwort */
379 assert( Client != NULL );
380 assert( Pwd != NULL );
382 strncpy( Client->pwd, Pwd, CLIENT_PASS_LEN - 1 );
383 Client->pwd[CLIENT_PASS_LEN - 1] = '\0';
384 } /* Client_SetPassword */
388 Client_SetAway( CLIENT *Client, CHAR *Txt )
390 /* Von einem Client gelieferte AWAY-Nachricht */
392 assert( Client != NULL );
396 /* Client AWAY setzen */
397 strncpy( Client->away, Txt, CLIENT_AWAY_LEN - 1 );
398 Client->away[CLIENT_AWAY_LEN - 1] = '\0';
399 Client_ModeAdd( Client, 'a' );
400 Log( LOG_DEBUG, "User \"%s\" is away: %s", Client_Mask( Client ), Txt );
405 Client_ModeDel( Client, 'a' );
406 Log( LOG_DEBUG, "User \"%s\" is no longer away.", Client_Mask( Client ));
408 } /* Client_SetAway */
412 Client_SetType( CLIENT *Client, INT Type )
414 assert( Client != NULL );
416 if( Type == CLIENT_SERVER ) Generate_MyToken( Client );
417 } /* Client_SetType */
421 Client_SetHops( CLIENT *Client, INT Hops )
423 assert( Client != NULL );
425 } /* Client_SetHops */
429 Client_SetToken( CLIENT *Client, INT Token )
431 assert( Client != NULL );
432 Client->token = Token;
433 } /* Client_SetToken */
437 Client_SetIntroducer( CLIENT *Client, CLIENT *Introducer )
439 assert( Client != NULL );
440 assert( Introducer != NULL );
441 Client->introducer = Introducer;
442 } /* Client_SetIntroducer */
446 Client_SetOperByMe( CLIENT *Client, BOOLEAN OperByMe )
448 assert( Client != NULL );
449 Client->oper_by_me = OperByMe;
450 } /* Client_SetOperByMe */
454 Client_ModeAdd( CLIENT *Client, CHAR Mode )
456 /* Mode soll gesetzt werden. TRUE wird geliefert, wenn der
457 * Mode neu gesetzt wurde, FALSE, wenn der Client den Mode
462 assert( Client != NULL );
464 x[0] = Mode; x[1] = '\0';
465 if( ! strchr( Client->modes, x[0] ))
467 /* Client hat den Mode noch nicht -> setzen */
468 strcat( Client->modes, x );
472 } /* Client_ModeAdd */
476 Client_ModeDel( CLIENT *Client, CHAR Mode )
478 /* Mode soll geloescht werden. TRUE wird geliefert, wenn der
479 * Mode entfernt wurde, FALSE, wenn der Client den Mode
480 * ueberhaupt nicht hatte. */
484 assert( Client != NULL );
486 x[0] = Mode; x[1] = '\0';
488 p = strchr( Client->modes, x[0] );
489 if( ! p ) return FALSE;
491 /* Client hat den Mode -> loeschen */
498 } /* Client_ModeDel */
502 Client_GetFromConn( CONN_ID Idx )
504 /* Client-Struktur, die zur lokalen Verbindung Idx gehoert,
505 * liefern. Wird keine gefunden, so wird NULL geliefert. */
514 if( c->conn_id == Idx ) return c;
515 c = (CLIENT *)c->next;
518 } /* Client_GetFromConn */
522 Client_Search( CHAR *Nick )
524 /* Client-Struktur, die den entsprechenden Nick hat, liefern.
525 * Wird keine gefunden, so wird NULL geliefert. */
527 CHAR search_id[CLIENT_ID_LEN], *ptr;
531 assert( Nick != NULL );
533 /* Nick kopieren und ggf. Host-Mask abschneiden */
534 strncpy( search_id, Nick, CLIENT_ID_LEN - 1 );
535 search_id[CLIENT_ID_LEN - 1] = '\0';
536 ptr = strchr( search_id, '!' );
537 if( ptr ) *ptr = '\0';
539 search_hash = Hash( search_id );
544 if( c->hash == search_hash )
546 /* lt. Hash-Wert: Treffer! */
547 if( strcasecmp( c->id, search_id ) == 0 ) return c;
549 c = (CLIENT *)c->next;
552 } /* Client_Search */
556 Client_GetFromToken( CLIENT *Client, INT Token )
558 /* Client-Struktur, die den entsprechenden Introducer (=Client)
559 * und das gegebene Token hat, liefern. Wird keine gefunden,
560 * so wird NULL geliefert. */
564 assert( Client != NULL );
570 if(( c->type == CLIENT_SERVER ) && ( c->introducer == Client ) && ( c->token == Token )) return c;
571 c = (CLIENT *)c->next;
574 } /* Client_GetFromToken */
578 Client_Type( CLIENT *Client )
580 assert( Client != NULL );
586 Client_Conn( CLIENT *Client )
588 assert( Client != NULL );
589 return Client->conn_id;
594 Client_ID( CLIENT *Client )
596 assert( Client != NULL );
599 if( Client->type == CLIENT_USER ) assert( strlen( Client->id ) < CLIENT_NICK_LEN );
602 if( Client->id[0] ) return Client->id;
608 Client_Info( CLIENT *Client )
610 assert( Client != NULL );
616 Client_User( CLIENT *Client )
618 assert( Client != NULL );
619 if( Client->user[0] ) return Client->user;
625 Client_Hostname( CLIENT *Client )
627 assert( Client != NULL );
629 } /* Client_Hostname */
633 Client_Password( CLIENT *Client )
635 assert( Client != NULL );
637 } /* Client_Password */
641 Client_Modes( CLIENT *Client )
643 assert( Client != NULL );
644 return Client->modes;
649 Client_Flags( CLIENT *Client )
651 assert( Client != NULL );
652 return Client->flags;
657 Client_OperByMe( CLIENT *Client )
659 assert( Client != NULL );
660 return Client->oper_by_me;
661 } /* Client_OperByMe */
665 Client_Hops( CLIENT *Client )
667 assert( Client != NULL );
673 Client_Token( CLIENT *Client )
675 assert( Client != NULL );
676 return Client->token;
681 Client_MyToken( CLIENT *Client )
683 assert( Client != NULL );
684 return Client->mytoken;
685 } /* Client_MyToken */
689 Client_NextHop( CLIENT *Client )
693 assert( Client != NULL );
696 while( c->introducer && ( c->introducer != c ) && ( c->introducer != This_Server )) c = c->introducer;
698 } /* Client_NextHop */
702 Client_Mask( CLIENT *Client )
704 /* Client-"ID" liefern, wie sie z.B. fuer
705 * Prefixe benoetigt wird. */
707 assert( Client != NULL );
709 if( Client->type == CLIENT_SERVER ) return Client->id;
711 snprintf( GetID_Buffer, GETID_LEN, "%s!%s@%s", Client->id, Client->user, Client->host );
717 Client_Introducer( CLIENT *Client )
719 assert( Client != NULL );
720 return Client->introducer;
721 } /* Client_Introducer */
725 Client_TopServer( CLIENT *Client )
727 assert( Client != NULL );
728 return Client->topserver;
729 } /* Client_TopServer */
733 Client_HasMode( CLIENT *Client, CHAR Mode )
735 assert( Client != NULL );
736 return strchr( Client->modes, Mode ) != NULL;
737 } /* Client_HasMode */
741 Client_Away( CLIENT *Client )
743 /* AWAY-Text liefern */
745 assert( Client != NULL );
751 Client_CheckNick( CLIENT *Client, CHAR *Nick )
753 /* Nick ueberpruefen */
755 assert( Client != NULL );
756 assert( Nick != NULL );
758 /* Nick ungueltig? */
759 if( ! Client_IsValidNick( Nick ))
761 IRC_WriteStrClient( Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID( Client ), Nick );
765 /* Nick bereits vergeben? */
766 if( Client_Search( Nick ))
768 /* den Nick gibt es bereits */
769 IRC_WriteStrClient( Client, ERR_NICKNAMEINUSE_MSG, Client_ID( Client ), Nick );
774 } /* Client_CheckNick */
778 Client_CheckID( CLIENT *Client, CHAR *ID )
780 /* Nick ueberpruefen */
782 CHAR str[COMMAND_LEN];
785 assert( Client != NULL );
786 assert( Client->conn_id > NONE );
787 assert( ID != NULL );
790 if( strlen( ID ) > CLIENT_ID_LEN )
792 IRC_WriteStrClient( Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID( Client ), ID );
796 /* ID bereits vergeben? */
800 if( strcasecmp( c->id, ID ) == 0 )
802 /* die Server-ID gibt es bereits */
803 sprintf( str, "ID \"%s\" already registered", ID );
804 if( Client->conn_id != c->conn_id ) Log( LOG_ERR, "%s (on connection %d)!", str, c->conn_id );
805 else Log( LOG_ERR, "%s (via network)!", str );
806 Conn_Close( Client->conn_id, str, str, TRUE );
809 c = (CLIENT *)c->next;
813 } /* Client_CheckID */
819 /* Ersten Client liefern. */
826 Client_Next( CLIENT *c )
828 /* Naechsten Client liefern. Existiert keiner,
829 * so wird NULL geliefert. */
832 return (CLIENT *)c->next;
837 Client_UserCount( VOID )
839 return Count( CLIENT_USER );
840 } /* Client_UserCount */
844 Client_ServiceCount( VOID )
846 return Count( CLIENT_SERVICE );;
847 } /* Client_ServiceCount */
851 Client_ServerCount( VOID )
853 return Count( CLIENT_SERVER );
854 } /* Client_ServerCount */
858 Client_MyUserCount( VOID )
860 return MyCount( CLIENT_USER );
861 } /* Client_MyUserCount */
865 Client_MyServiceCount( VOID )
867 return MyCount( CLIENT_SERVICE );
868 } /* Client_MyServiceCount */
872 Client_MyServerCount( VOID )
881 if(( c->type == CLIENT_SERVER ) && ( c->hops == 1 )) cnt++;
882 c = (CLIENT *)c->next;
885 } /* Client_MyServerCount */
889 Client_OperCount( VOID )
898 if( c && ( c->type == CLIENT_USER ) && ( strchr( c->modes, 'o' ))) cnt++;
899 c = (CLIENT *)c->next;
902 } /* Client_OperCount */
906 Client_UnknownCount( VOID )
915 if( c && ( c->type != CLIENT_USER ) && ( c->type != CLIENT_SERVICE ) && ( c->type != CLIENT_SERVER )) cnt++;
916 c = (CLIENT *)c->next;
919 } /* Client_UnknownCount */
923 Client_IsValidNick( CHAR *Nick )
925 /* Ist der Nick gueltig? */
927 CHAR *ptr, goodchars[20];
929 assert( Nick != NULL );
931 strcpy( goodchars, ";0123456789-" );
933 if( Nick[0] == '#' ) return FALSE;
934 if( strchr( goodchars, Nick[0] )) return FALSE;
935 if( strlen( Nick ) >= CLIENT_NICK_LEN ) return FALSE;
940 if(( *ptr < 'A' ) && ( ! strchr( goodchars, *ptr ))) return FALSE;
941 if(( *ptr > '}' ) && ( ! strchr( goodchars, *ptr ))) return FALSE;
946 } /* Client_IsValidNick */
950 Count( CLIENT_TYPE Type )
959 if( c->type == Type ) cnt++;
960 c = (CLIENT *)c->next;
967 MyCount( CLIENT_TYPE Type )
976 if(( c->introducer == This_Server ) && ( c->type == Type )) cnt++;
977 c = (CLIENT *)c->next;
984 New_Client_Struct( VOID )
986 /* Neue CLIENT-Struktur pre-initialisieren */
990 c = malloc( sizeof( CLIENT ));
993 Log( LOG_EMERG, "Can't allocate memory! [New_Client_Struct]" );
999 c->type = CLIENT_UNKNOWN;
1001 c->introducer = NULL;
1002 c->topserver = NULL;
1003 strcpy( c->id, "" );
1004 strcpy( c->pwd, "" );
1005 strcpy( c->host, "" );
1006 strcpy( c->user, "" );
1007 strcpy( c->info, "" );
1008 strcpy( c->modes, "" );
1009 c->oper_by_me = FALSE;
1013 strcpy( c->away, "" );
1014 strcpy( c->flags, "" );
1021 Generate_MyToken( CLIENT *Client )
1030 if( c->mytoken == token )
1032 /* Das Token wurde bereits vergeben */
1037 else c = (CLIENT *)c->next;
1039 Client->mytoken = token;
1040 Log( LOG_DEBUG, "Assigned token %d to server \"%s\".", token, Client->id );
1041 } /* Generate_MyToken */