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 1.19 2002/09/03 20:39:54 alex Exp $
14 * irc-login.c: Anmeldung und Abmeldung im IRC
36 #include "irc-write.h"
39 #include "irc-login.h"
42 LOCAL BOOLEAN Hello_User PARAMS(( CLIENT *Client ));
43 LOCAL VOID Kill_Nick PARAMS(( CHAR *Nick, CHAR *Reason ));
47 IRC_PASS( CLIENT *Client, REQUEST *Req )
49 assert( Client != NULL );
50 assert( Req != NULL );
52 /* Fehler liefern, wenn kein lokaler Client */
53 if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
55 if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
57 /* noch nicht registrierte unbekannte Verbindung */
58 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
60 /* Passwort speichern */
61 Client_SetPassword( Client, Req->argv[0] );
63 Client_SetType( Client, CLIENT_GOTPASS );
66 else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
68 CHAR c, *type, *impl, *serverver, *flags, *ptr;
69 INT protohigh, protolow;
71 /* noch nicht registrierte Server-Verbindung */
72 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
74 /* Passwort speichern */
75 Client_SetPassword( Client, Req->argv[0] );
77 /* Protokollversion ermitteln */
78 if( strlen( Req->argv[1] ) >= 4 )
81 Req->argv[1][4] = '\0';
83 protolow = atoi( &Req->argv[1][2] );
84 Req->argv[1][2] = '\0';
85 protohigh = atoi( Req->argv[1] );
89 else protohigh = protolow = 0;
92 if( strlen( Req->argv[1] ) > 4 ) type = &Req->argv[1][4];
95 /* Implementation, Version und ngIRCd-Flags */
97 ptr = strchr( impl, '|' );
98 if( ptr ) *ptr = '\0';
100 if( type && ( strcmp( type, PROTOIRCPLUS ) == 0 ))
102 /* auf der anderen Seite laeuft ein Server, der
103 * ebenfalls das IRC+-Protokoll versteht */
105 flags = strchr( serverver, ':' );
112 Log( LOG_INFO, "Connection %d: Peer announces itself as %s-%s (flags: \"%s\") using protocol version %d.%d+.", Client_Conn( Client ), impl, serverver, flags, protohigh, protolow );
116 serverver = flags = "";
117 Log( LOG_INFO, "Connection %d: Peer announces itself as \"%s\" using protocol version %d.%d.", Client_Conn( Client ), impl, protohigh, protolow );
120 Client_SetType( Client, CLIENT_GOTPASSSERVER );
121 Client_SetFlags( Client, flags );
125 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
127 /* Falsche Anzahl Parameter? */
128 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
130 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
135 IRC_NICK( CLIENT *Client, REQUEST *Req )
137 CLIENT *intr_c, *target, *c;
140 assert( Client != NULL );
141 assert( Req != NULL );
143 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
145 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 ))
147 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 ))
150 /* User-Registrierung bzw. Nick-Aenderung */
152 /* Falsche Anzahl Parameter? */
153 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
155 /* "Ziel-Client" ermitteln */
156 if( Client_Type( Client ) == CLIENT_SERVER )
158 target = Client_Search( Req->prefix );
159 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
163 /* Ist der Client "restricted"? */
164 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
169 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
170 * wir nichts. So macht es das Original und mind. Snak hat probleme,
171 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
172 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
175 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
176 * will nur die Gross- und Kleinschreibung aendern. Das darf
177 * er natuerlich machen :-) */
178 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
180 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
183 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
186 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
188 /* Client-Nick registrieren */
189 Client_SetID( target, Req->argv[0] );
191 /* schon ein USER da? Dann registrieren! */
192 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
193 else Client_SetType( Client, CLIENT_GOTNICK );
198 if( Client_Conn( target ) > NONE )
201 Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
206 Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
209 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
210 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
211 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
212 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
214 /* neuen Client-Nick speichern */
215 Client_SetID( target, Req->argv[0] );
220 else if( Client_Type( Client ) == CLIENT_SERVER )
222 /* Server fuehrt neuen Client ein */
224 /* Falsche Anzahl Parameter? */
225 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
227 /* Nick ueberpruefen */
228 c = Client_Search( Req->argv[0] );
231 /* Der neue Nick ist auf diesem Server bereits registriert:
232 * sowohl der neue, als auch der alte Client muessen nun
233 * disconnectiert werden. */
234 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
235 Kill_Nick( Req->argv[0], "Nick collision" );
239 /* Server, zu dem der Client connectiert ist, suchen */
240 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
243 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
244 Kill_Nick( Req->argv[0], "Unknown server" );
248 /* Neue Client-Struktur anlegen */
249 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 );
252 /* Eine neue Client-Struktur konnte nicht angelegt werden.
253 * Der Client muss disconnectiert werden, damit der Netz-
254 * status konsistent bleibt. */
255 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
256 Kill_Nick( Req->argv[0], "Server error" );
260 modes = Client_Modes( c );
261 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": "" );
262 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": "" );
264 /* Andere Server, ausser dem Introducer, informieren */
265 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] );
269 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
274 IRC_USER( CLIENT *Client, REQUEST *Req )
276 assert( Client != NULL );
277 assert( Req != NULL );
280 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
282 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
285 /* Falsche Anzahl Parameter? */
286 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
288 Client_SetUser( Client, Req->argv[0], FALSE );
289 Client_SetInfo( Client, Req->argv[3] );
291 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
292 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
293 else Client_SetType( Client, CLIENT_GOTUSER );
296 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
298 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
300 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
305 IRC_QUIT( CLIENT *Client, REQUEST *Req )
309 assert( Client != NULL );
310 assert( Req != NULL );
312 if ( Client_Type( Client ) == CLIENT_SERVER )
316 /* Falsche Anzahl Parameter? */
317 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
319 target = Client_Search( Req->prefix );
322 /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
323 Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
327 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
328 else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
334 /* User, Service, oder noch nicht registriert */
336 /* Falsche Anzahl Parameter? */
337 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
339 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
340 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
348 IRC_PING( CLIENT *Client, REQUEST *Req )
350 CLIENT *target, *from;
352 assert( Client != NULL );
353 assert( Req != NULL );
355 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
357 /* Falsche Anzahl Parameter? */
358 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
360 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
365 /* es wurde ein Ziel-Client angegeben */
366 target = Client_Search( Req->argv[1] );
367 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
368 if( target != Client_ThisServer( ))
371 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
373 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
374 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
378 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
379 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
384 IRC_PONG( CLIENT *Client, REQUEST *Req )
386 CLIENT *target, *from;
388 assert( Client != NULL );
389 assert( Req != NULL );
391 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
393 /* Falsche Anzahl Parameter? */
394 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
395 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
400 target = Client_Search( Req->argv[1] );
401 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
402 if( target != Client_ThisServer( ))
405 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
407 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
408 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
412 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
413 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
415 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 )));
416 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
423 Hello_User( CLIENT *Client )
425 assert( Client != NULL );
427 /* Passwort ueberpruefen */
428 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
430 /* Falsches Passwort */
431 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
432 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
436 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
438 /* Andere Server informieren */
439 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 ));
441 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
442 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, TARGET_CPU, TARGET_CPU, TARGET_OS )) return FALSE;
443 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
444 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, USERMODES, CHANMODES )) return FALSE;
446 Client_SetType( Client, CLIENT_USER );
448 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
449 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
456 Kill_Nick( CHAR *Nick, CHAR *Reason )
460 assert( Nick != NULL );
461 assert( Reason != NULL );
463 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
465 /* andere Server benachrichtigen */
466 IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
468 /* Ggf. einen eigenen Client toeten */
469 c = Client_Search( Nick );
470 if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );