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 1.4 2002/03/10 22:40:22 alex Exp $
14 * irc-login.c: Anmeldung und Abmeldung im IRC
16 * $Log: irc-login.c,v $
17 * Revision 1.4 2002/03/10 22:40:22 alex
18 * - IRC_PING() ist, wenn nicht im "strict RFC"-Mode, toleranter und akzptiert
19 * beliebig viele Parameter: z.B. BitchX sendet soetwas.
21 * Revision 1.3 2002/03/03 17:15:11 alex
22 * - Source in weitere Module fuer IRC-Befehle aufgesplitted.
24 * Revision 1.2 2002/03/02 00:49:11 alex
25 * - Bei der USER-Registrierung wird NICK nicht mehr sofort geforwarded,
26 * sondern erst dann, wenn auch ein gueltiges USER empfangen wurde.
28 * Revision 1.1 2002/02/27 23:26:21 alex
29 * - Modul aus irc.c bzw. irc.h ausgegliedert.
45 #include "irc-write.h"
50 #include "irc-login.h"
53 LOCAL BOOLEAN Hello_User( CLIENT *Client );
54 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason );
57 GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
59 assert( Client != NULL );
60 assert( Req != NULL );
62 /* Fehler liefern, wenn kein lokaler Client */
63 if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
65 if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
67 /* noch nicht registrierte unbekannte Verbindung */
68 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
70 /* Passwort speichern */
71 Client_SetPassword( Client, Req->argv[0] );
73 Client_SetType( Client, CLIENT_GOTPASS );
76 else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
78 /* noch nicht registrierte Server-Verbindung */
79 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
81 /* Passwort speichern */
82 Client_SetPassword( Client, Req->argv[0] );
84 Client_SetType( Client, CLIENT_GOTPASSSERVER );
87 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
89 /* Falsche Anzahl Parameter? */
90 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
92 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
96 GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
98 CLIENT *intr_c, *target, *c;
101 assert( Client != NULL );
102 assert( Req != NULL );
104 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
106 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 ))
108 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 ))
111 /* User-Registrierung bzw. Nick-Aenderung */
113 /* Falsche Anzahl Parameter? */
114 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
116 /* "Ziel-Client" ermitteln */
117 if( Client_Type( Client ) == CLIENT_SERVER )
119 target = Client_GetFromID( Req->prefix );
120 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
124 /* Ist der Client "restricted"? */
125 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
130 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
131 * wir nichts. So macht es das Original und mind. Snak hat probleme,
132 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
133 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
136 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
137 * will nur die Gross- und Kleinschreibung aendern. Das darf
138 * er natuerlich machen :-) */
139 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
141 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
144 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
147 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
149 /* Client-Nick registrieren */
150 Client_SetID( target, Req->argv[0] );
152 /* schon ein USER da? Dann registrieren! */
153 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
154 else Client_SetType( Client, CLIENT_GOTNICK );
159 Log( LOG_INFO, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
161 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
162 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
163 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
164 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
166 /* neuen Client-Nick speichern */
167 Client_SetID( target, Req->argv[0] );
172 else if( Client_Type( Client ) == CLIENT_SERVER )
174 /* Server fuehrt neuen Client ein */
176 /* Falsche Anzahl Parameter? */
177 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
179 /* Nick ueberpruefen */
180 c = Client_GetFromID( Req->argv[0] );
183 /* Der neue Nick ist auf diesem Server bereits registriert:
184 * sowohl der neue, als auch der alte Client muessen nun
185 * disconnectiert werden. */
186 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
187 Kill_Nick( Req->argv[0], "Nick collision" );
191 /* Server, zu dem der Client connectiert ist, suchen */
192 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
195 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
196 Kill_Nick( Req->argv[0], "Unknown server" );
200 /* Neue Client-Struktur anlegen */
201 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 );
204 /* Eine neue Client-Struktur konnte nicht angelegt werden.
205 * Der Client muss disconnectiert werden, damit der Netz-
206 * status konsistent bleibt. */
207 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
208 Kill_Nick( Req->argv[0], "Server error" );
212 modes = Client_Modes( c );
213 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": "" );
214 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": "" );
216 /* Andere Server, ausser dem Introducer, informieren */
217 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] );
221 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
225 GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
227 assert( Client != NULL );
228 assert( Req != NULL );
231 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
233 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
236 /* Falsche Anzahl Parameter? */
237 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
239 Client_SetUser( Client, Req->argv[0], FALSE );
240 Client_SetInfo( Client, Req->argv[3] );
242 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
243 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
244 else Client_SetType( Client, CLIENT_GOTUSER );
247 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
249 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
251 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
255 GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
259 assert( Client != NULL );
260 assert( Req != NULL );
262 if(( Client_Type( Client ) == CLIENT_USER ) || ( Client_Type( Client ) == CLIENT_SERVICE ))
266 /* Falsche Anzahl Parameter? */
267 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
269 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
270 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
274 else if ( Client_Type( Client ) == CLIENT_SERVER )
278 /* Falsche Anzahl Parameter? */
279 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
281 target = Client_Search( Req->prefix );
284 Log( LOG_ERR, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
288 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL );
289 else Client_Destroy( target, "Got QUIT command.", Req->argv[0] );
293 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
297 GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
299 CLIENT *target, *from;
301 assert( Client != NULL );
302 assert( Req != NULL );
304 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
306 /* Falsche Anzahl Parameter? */
307 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
309 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
314 /* es wurde ein Ziel-Client angegeben */
315 target = Client_GetFromID( Req->argv[1] );
316 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
317 if( target != Client_ThisServer( ))
320 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
322 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
323 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
327 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
328 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
332 GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
334 CLIENT *target, *from;
336 assert( Client != NULL );
337 assert( Req != NULL );
339 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
341 /* Falsche Anzahl Parameter? */
342 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
343 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
348 target = Client_GetFromID( Req->argv[1] );
349 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
350 if( target != Client_ThisServer( ))
353 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
355 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
356 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
360 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
361 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
363 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 )));
364 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
370 LOCAL BOOLEAN Hello_User( CLIENT *Client )
372 assert( Client != NULL );
374 /* Passwort ueberpruefen */
375 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
377 /* Falsches Passwort */
378 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
379 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
383 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
385 /* Andere Server informieren */
386 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 ));
388 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
389 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
390 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
391 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
393 Client_SetType( Client, CLIENT_USER );
395 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
396 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
402 LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason )
406 assert( Nick != NULL );
407 assert( Reason != NULL );
409 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
411 /* andere Server benachrichtigen */
412 IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
414 /* Ggf. einen eigenen Client toeten */
415 c = Client_GetFromID( Nick );
416 if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );