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 1.15 2002/05/30 16:52:21 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 /* noch nicht registrierte Server-Verbindung */
69 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
71 /* Passwort speichern */
72 Client_SetPassword( Client, Req->argv[0] );
74 Client_SetType( Client, CLIENT_GOTPASSSERVER );
77 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
79 /* Falsche Anzahl Parameter? */
80 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
82 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
87 IRC_NICK( CLIENT *Client, REQUEST *Req )
89 CLIENT *intr_c, *target, *c;
92 assert( Client != NULL );
93 assert( Req != NULL );
95 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
97 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 ))
99 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 ))
102 /* User-Registrierung bzw. Nick-Aenderung */
104 /* Falsche Anzahl Parameter? */
105 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
107 /* "Ziel-Client" ermitteln */
108 if( Client_Type( Client ) == CLIENT_SERVER )
110 target = Client_Search( Req->prefix );
111 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
115 /* Ist der Client "restricted"? */
116 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
121 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
122 * wir nichts. So macht es das Original und mind. Snak hat probleme,
123 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
124 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
127 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
128 * will nur die Gross- und Kleinschreibung aendern. Das darf
129 * er natuerlich machen :-) */
130 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
132 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
135 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
138 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
140 /* Client-Nick registrieren */
141 Client_SetID( target, Req->argv[0] );
143 /* schon ein USER da? Dann registrieren! */
144 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
145 else Client_SetType( Client, CLIENT_GOTNICK );
150 if( Client_Conn( target ) > NONE )
153 Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
158 Log( LOG_DEBUG, "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_Search( 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 ));
226 IRC_USER( CLIENT *Client, REQUEST *Req )
228 assert( Client != NULL );
229 assert( Req != NULL );
232 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
234 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
237 /* Falsche Anzahl Parameter? */
238 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
240 Client_SetUser( Client, Req->argv[0], FALSE );
241 Client_SetInfo( Client, Req->argv[3] );
243 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
244 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
245 else Client_SetType( Client, CLIENT_GOTUSER );
248 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
250 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
252 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
257 IRC_QUIT( CLIENT *Client, REQUEST *Req )
261 assert( Client != NULL );
262 assert( Req != NULL );
264 if ( Client_Type( Client ) == CLIENT_SERVER )
268 /* Falsche Anzahl Parameter? */
269 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
271 target = Client_Search( Req->prefix );
274 /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
275 Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
279 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
280 else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
286 /* User, Service, oder noch nicht registriert */
288 /* Falsche Anzahl Parameter? */
289 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
291 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
292 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
300 IRC_PING( CLIENT *Client, REQUEST *Req )
302 CLIENT *target, *from;
304 assert( Client != NULL );
305 assert( Req != NULL );
307 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
309 /* Falsche Anzahl Parameter? */
310 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
312 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
317 /* es wurde ein Ziel-Client angegeben */
318 target = Client_Search( Req->argv[1] );
319 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
320 if( target != Client_ThisServer( ))
323 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
325 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
326 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
330 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
331 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
336 IRC_PONG( CLIENT *Client, REQUEST *Req )
338 CLIENT *target, *from;
340 assert( Client != NULL );
341 assert( Req != NULL );
343 if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
345 /* Falsche Anzahl Parameter? */
346 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
347 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
352 target = Client_Search( Req->argv[1] );
353 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
354 if( target != Client_ThisServer( ))
357 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
359 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
360 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
364 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
365 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
367 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 )));
368 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
375 Hello_User( CLIENT *Client )
377 assert( Client != NULL );
379 /* Passwort ueberpruefen */
380 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
382 /* Falsches Passwort */
383 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
384 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
388 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
390 /* Andere Server informieren */
391 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 ));
393 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
394 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, TARGET_CPU, TARGET_CPU, TARGET_OS )) return FALSE;
395 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
396 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, USERMODES, CHANMODES )) return FALSE;
398 Client_SetType( Client, CLIENT_USER );
400 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
401 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
408 Kill_Nick( CHAR *Nick, CHAR *Reason )
412 assert( Nick != NULL );
413 assert( Reason != NULL );
415 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
417 /* andere Server benachrichtigen */
418 IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
420 /* Ggf. einen eigenen Client toeten */
421 c = Client_Search( Nick );
422 if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );