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 1.3 2002/03/03 17:15:11 alex Exp $
14 * irc-login.c: Anmeldung und Abmeldung im IRC
16 * $Log: irc-login.c,v $
17 * Revision 1.3 2002/03/03 17:15:11 alex
18 * - Source in weitere Module fuer IRC-Befehle aufgesplitted.
20 * Revision 1.2 2002/03/02 00:49:11 alex
21 * - Bei der USER-Registrierung wird NICK nicht mehr sofort geforwarded,
22 * sondern erst dann, wenn auch ein gueltiges USER empfangen wurde.
24 * Revision 1.1 2002/02/27 23:26:21 alex
25 * - Modul aus irc.c bzw. irc.h ausgegliedert.
41 #include "irc-write.h"
46 #include "irc-login.h"
49 LOCAL BOOLEAN Hello_User( CLIENT *Client );
50 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason );
53 GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
55 assert( Client != NULL );
56 assert( Req != NULL );
58 /* Fehler liefern, wenn kein lokaler Client */
59 if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
61 if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
63 /* noch nicht registrierte unbekannte Verbindung */
64 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
66 /* Passwort speichern */
67 Client_SetPassword( Client, Req->argv[0] );
69 Client_SetType( Client, CLIENT_GOTPASS );
72 else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
74 /* noch nicht registrierte Server-Verbindung */
75 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
77 /* Passwort speichern */
78 Client_SetPassword( Client, Req->argv[0] );
80 Client_SetType( Client, CLIENT_GOTPASSSERVER );
83 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
85 /* Falsche Anzahl Parameter? */
86 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
88 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
92 GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
94 CLIENT *intr_c, *target, *c;
97 assert( Client != NULL );
98 assert( Req != NULL );
100 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
102 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 ))
104 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 ))
107 /* User-Registrierung bzw. Nick-Aenderung */
109 /* Falsche Anzahl Parameter? */
110 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
112 /* "Ziel-Client" ermitteln */
113 if( Client_Type( Client ) == CLIENT_SERVER )
115 target = Client_GetFromID( Req->prefix );
116 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
120 /* Ist der Client "restricted"? */
121 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
126 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
127 * wir nichts. So macht es das Original und mind. Snak hat probleme,
128 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
129 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
132 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
133 * will nur die Gross- und Kleinschreibung aendern. Das darf
134 * er natuerlich machen :-) */
135 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
137 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
140 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
143 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
145 /* Client-Nick registrieren */
146 Client_SetID( target, Req->argv[0] );
148 /* schon ein USER da? Dann registrieren! */
149 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
150 else Client_SetType( Client, CLIENT_GOTNICK );
155 Log( LOG_INFO, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
157 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
158 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
159 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
160 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
162 /* neuen Client-Nick speichern */
163 Client_SetID( target, Req->argv[0] );
168 else if( Client_Type( Client ) == CLIENT_SERVER )
170 /* Server fuehrt neuen Client ein */
172 /* Falsche Anzahl Parameter? */
173 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
175 /* Nick ueberpruefen */
176 c = Client_GetFromID( Req->argv[0] );
179 /* Der neue Nick ist auf diesem Server bereits registriert:
180 * sowohl der neue, als auch der alte Client muessen nun
181 * disconnectiert werden. */
182 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
183 Kill_Nick( Req->argv[0], "Nick collision" );
187 /* Server, zu dem der Client connectiert ist, suchen */
188 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
191 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
192 Kill_Nick( Req->argv[0], "Unknown server" );
196 /* Neue Client-Struktur anlegen */
197 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 );
200 /* Eine neue Client-Struktur konnte nicht angelegt werden.
201 * Der Client muss disconnectiert werden, damit der Netz-
202 * status konsistent bleibt. */
203 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
204 Kill_Nick( Req->argv[0], "Server error" );
208 modes = Client_Modes( c );
209 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": "" );
210 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": "" );
212 /* Andere Server, ausser dem Introducer, informieren */
213 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] );
217 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
221 GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
223 assert( Client != NULL );
224 assert( Req != NULL );
227 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
229 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
232 /* Falsche Anzahl Parameter? */
233 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
235 Client_SetUser( Client, Req->argv[0], FALSE );
236 Client_SetInfo( Client, Req->argv[3] );
238 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
239 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
240 else Client_SetType( Client, CLIENT_GOTUSER );
243 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
245 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
247 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
251 GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
255 assert( Client != NULL );
256 assert( Req != NULL );
258 if(( Client_Type( Client ) == CLIENT_USER ) || ( Client_Type( Client ) == CLIENT_SERVICE ))
262 /* Falsche Anzahl Parameter? */
263 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
265 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
266 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
270 else if ( Client_Type( Client ) == CLIENT_SERVER )
274 /* Falsche Anzahl Parameter? */
275 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
277 target = Client_Search( Req->prefix );
280 Log( LOG_ERR, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
284 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL );
285 else Client_Destroy( target, "Got QUIT command.", Req->argv[0] );
289 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
293 GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
295 CLIENT *target, *from;
297 assert( Client != NULL );
298 assert( Req != NULL );
300 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
302 /* Falsche Anzahl Parameter? */
303 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
304 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
308 /* es wurde ein Ziel-Client angegeben */
309 target = Client_GetFromID( Req->argv[1] );
310 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
311 if( target != Client_ThisServer( ))
314 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
316 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
317 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
321 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
322 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
326 GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
328 CLIENT *target, *from;
330 assert( Client != NULL );
331 assert( Req != NULL );
333 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
335 /* Falsche Anzahl Parameter? */
336 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
337 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
342 target = Client_GetFromID( Req->argv[1] );
343 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
344 if( target != Client_ThisServer( ))
347 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
349 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
350 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
354 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
355 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
357 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 )));
358 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
364 LOCAL BOOLEAN Hello_User( CLIENT *Client )
366 assert( Client != NULL );
368 /* Passwort ueberpruefen */
369 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
371 /* Falsches Passwort */
372 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
373 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
377 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
379 /* Andere Server informieren */
380 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 ));
382 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
383 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
384 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
385 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
387 Client_SetType( Client, CLIENT_USER );
389 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
390 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
396 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason )
400 assert( Nick != NULL );
401 assert( Reason != NULL );
403 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
405 /* andere Server benachrichtigen */
406 IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
408 /* Ggf. einen eigenen Client toeten */
409 c = Client_GetFromID( Nick );
410 if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );