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: irc-login.c,v 1.6 2002/03/11 22:04:10 alex Exp $
14 * irc-login.c: Anmeldung und Abmeldung im IRC
16 * $Log: irc-login.c,v $
17 * Revision 1.6 2002/03/11 22:04:10 alex
18 * - Client_Destroy() hat neuen Paramter: QUITs fuer Clients verschicken?
20 * Revision 1.5 2002/03/11 17:33:40 alex
21 * - Log-Level von SQUIT und QUIT bei unbekannten Clients auf DEBUG herabgesetzt.
23 * Revision 1.4 2002/03/10 22:40:22 alex
24 * - IRC_PING() ist, wenn nicht im "strict RFC"-Mode, toleranter und akzptiert
25 * beliebig viele Parameter: z.B. BitchX sendet soetwas.
27 * Revision 1.3 2002/03/03 17:15:11 alex
28 * - Source in weitere Module fuer IRC-Befehle aufgesplitted.
30 * Revision 1.2 2002/03/02 00:49:11 alex
31 * - Bei der USER-Registrierung wird NICK nicht mehr sofort geforwarded,
32 * sondern erst dann, wenn auch ein gueltiges USER empfangen wurde.
34 * Revision 1.1 2002/02/27 23:26:21 alex
35 * - Modul aus irc.c bzw. irc.h ausgegliedert.
51 #include "irc-write.h"
56 #include "irc-login.h"
59 LOCAL BOOLEAN Hello_User( CLIENT *Client );
60 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason );
63 GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
65 assert( Client != NULL );
66 assert( Req != NULL );
68 /* Fehler liefern, wenn kein lokaler Client */
69 if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
71 if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
73 /* noch nicht registrierte unbekannte Verbindung */
74 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
76 /* Passwort speichern */
77 Client_SetPassword( Client, Req->argv[0] );
79 Client_SetType( Client, CLIENT_GOTPASS );
82 else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
84 /* noch nicht registrierte Server-Verbindung */
85 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
87 /* Passwort speichern */
88 Client_SetPassword( Client, Req->argv[0] );
90 Client_SetType( Client, CLIENT_GOTPASSSERVER );
93 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
95 /* Falsche Anzahl Parameter? */
96 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
98 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
102 GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
104 CLIENT *intr_c, *target, *c;
107 assert( Client != NULL );
108 assert( Req != NULL );
110 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
112 if( Client_Type( Client ) == CLIENT_UNKNOWN || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTUSER || Client_Type( Client ) == CLIENT_USER || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 ))
114 if( Client_Type( Client ) == CLIENT_UNKNOWN || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_USER || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 ))
117 /* User-Registrierung bzw. Nick-Aenderung */
119 /* Falsche Anzahl Parameter? */
120 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
122 /* "Ziel-Client" ermitteln */
123 if( Client_Type( Client ) == CLIENT_SERVER )
125 target = Client_GetFromID( Req->prefix );
126 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
130 /* Ist der Client "restricted"? */
131 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
136 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
137 * wir nichts. So macht es das Original und mind. Snak hat probleme,
138 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
139 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
142 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
143 * will nur die Gross- und Kleinschreibung aendern. Das darf
144 * er natuerlich machen :-) */
145 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
147 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
150 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
153 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
155 /* Client-Nick registrieren */
156 Client_SetID( target, Req->argv[0] );
158 /* schon ein USER da? Dann registrieren! */
159 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
160 else Client_SetType( Client, CLIENT_GOTNICK );
165 Log( LOG_INFO, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
167 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
168 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
169 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
170 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
172 /* neuen Client-Nick speichern */
173 Client_SetID( target, Req->argv[0] );
178 else if( Client_Type( Client ) == CLIENT_SERVER )
180 /* Server fuehrt neuen Client ein */
182 /* Falsche Anzahl Parameter? */
183 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
185 /* Nick ueberpruefen */
186 c = Client_GetFromID( Req->argv[0] );
189 /* Der neue Nick ist auf diesem Server bereits registriert:
190 * sowohl der neue, als auch der alte Client muessen nun
191 * disconnectiert werden. */
192 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
193 Kill_Nick( Req->argv[0], "Nick collision" );
197 /* Server, zu dem der Client connectiert ist, suchen */
198 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
201 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
202 Kill_Nick( Req->argv[0], "Unknown server" );
206 /* Neue Client-Struktur anlegen */
207 c = Client_NewRemoteUser( intr_c, Req->argv[0], atoi( Req->argv[1] ), Req->argv[2], Req->argv[3], atoi( Req->argv[4] ), Req->argv[5] + 1, Req->argv[6], TRUE );
210 /* Eine neue Client-Struktur konnte nicht angelegt werden.
211 * Der Client muss disconnectiert werden, damit der Netz-
212 * status konsistent bleibt. */
213 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
214 Kill_Nick( Req->argv[0], "Server error" );
218 modes = Client_Modes( c );
219 if( *modes ) Log( LOG_DEBUG, "User \"%s\" (+%s) registered (via %s, on %s, %d hop%s).", Client_Mask( c ), modes, Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
220 else Log( LOG_DEBUG, "User \"%s\" registered (via %s, on %s, %d hop%s).", Client_Mask( c ), Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
222 /* Andere Server, ausser dem Introducer, informieren */
223 IRC_WriteStrServersPrefix( Client, Client, "NICK %s %d %s %s %d %s :%s", Req->argv[0], atoi( Req->argv[1] ) + 1, Req->argv[2], Req->argv[3], Client_MyToken( intr_c ), Req->argv[5], Req->argv[6] );
227 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
231 GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
233 assert( Client != NULL );
234 assert( Req != NULL );
237 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
239 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
242 /* Falsche Anzahl Parameter? */
243 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
245 Client_SetUser( Client, Req->argv[0], FALSE );
246 Client_SetInfo( Client, Req->argv[3] );
248 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
249 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
250 else Client_SetType( Client, CLIENT_GOTUSER );
253 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
255 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
257 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
261 GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
265 assert( Client != NULL );
266 assert( Req != NULL );
268 if(( Client_Type( Client ) == CLIENT_USER ) || ( Client_Type( Client ) == CLIENT_SERVICE ))
272 /* Falsche Anzahl Parameter? */
273 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
275 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
276 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
280 else if ( Client_Type( Client ) == CLIENT_SERVER )
284 /* Falsche Anzahl Parameter? */
285 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
287 target = Client_Search( Req->prefix );
290 /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
291 Log( LOG_DEBUG, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
295 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
296 else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
300 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
304 GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
306 CLIENT *target, *from;
308 assert( Client != NULL );
309 assert( Req != NULL );
311 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
313 /* Falsche Anzahl Parameter? */
314 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
316 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
321 /* es wurde ein Ziel-Client angegeben */
322 target = Client_GetFromID( Req->argv[1] );
323 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
324 if( target != Client_ThisServer( ))
327 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
329 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
330 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
334 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
335 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
339 GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
341 CLIENT *target, *from;
343 assert( Client != NULL );
344 assert( Req != NULL );
346 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
348 /* Falsche Anzahl Parameter? */
349 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
350 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
355 target = Client_GetFromID( Req->argv[1] );
356 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
357 if( target != Client_ThisServer( ))
360 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
362 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
363 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
367 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
368 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
370 if( Client_Conn( Client ) > NONE ) Log( LOG_DEBUG, "Connection %d: received PONG. Lag: %ld seconds.", Client_Conn( Client ), time( NULL ) - Conn_LastPing( Client_Conn( Client )));
371 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
377 LOCAL BOOLEAN Hello_User( CLIENT *Client )
379 assert( Client != NULL );
381 /* Passwort ueberpruefen */
382 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
384 /* Falsches Passwort */
385 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
386 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
390 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
392 /* Andere Server informieren */
393 IRC_WriteStrServers( NULL, "NICK %s 1 %s %s 1 +%s :%s", Client_ID( Client ), Client_User( Client ), Client_Hostname( Client ), Client_Modes( Client ), Client_Info( Client ));
395 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
396 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
397 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
398 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
400 Client_SetType( Client, CLIENT_USER );
402 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
403 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
409 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason )
413 assert( Nick != NULL );
414 assert( Reason != NULL );
416 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
418 /* andere Server benachrichtigen */
419 IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
421 /* Ggf. einen eigenen Client toeten */
422 c = Client_GetFromID( Nick );
423 if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );