2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
17 static char UNUSED id[] = "$Id: irc-login.c,v 1.34.2.1 2003/11/07 20:51:11 alex Exp $";
27 #include "conn-func.h"
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 c2, c4, *type, *impl, *serverver, *flags, *ptr, *ircflags;
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 )
83 Req->argv[1][4] = '\0';
84 protolow = atoi( &Req->argv[1][2] );
85 Req->argv[1][2] = '\0';
86 protohigh = atoi( Req->argv[1] );
91 else protohigh = protolow = 0;
94 if( strlen( Req->argv[1] ) > 4 ) type = &Req->argv[1][4];
97 /* IRC-Flags (nach RFC 2813) */
98 if( Req->argc >= 4 ) ircflags = Req->argv[3];
101 /* Implementation, Version und ngIRCd-Flags */
103 ptr = strchr( impl, '|' );
104 if( ptr ) *ptr = '\0';
106 if( type && ( strcmp( type, PROTOIRCPLUS ) == 0 ))
108 /* auf der anderen Seite laeuft ein Server, der
109 * ebenfalls das IRC+-Protokoll versteht */
111 flags = strchr( serverver, ':' );
118 Log( LOG_INFO, "Peer announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").", impl, serverver, protohigh, protolow, flags );
122 /* auf der anderen Seite laeuft ein Server, der
123 * nur das Originalprotokoll unterstuetzt */
125 if( strchr( ircflags, 'Z' )) flags = "Z";
127 Log( LOG_INFO, "Peer announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").", impl, protohigh, protolow, flags );
130 Client_SetType( Client, CLIENT_GOTPASSSERVER );
131 Client_SetFlags( Client, flags );
135 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
137 /* Falsche Anzahl Parameter? */
138 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
140 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
145 IRC_NICK( CLIENT *Client, REQUEST *Req )
147 CLIENT *intr_c, *target, *c;
150 assert( Client != NULL );
151 assert( Req != NULL );
153 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
155 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 ))
157 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 ))
160 /* User-Registrierung bzw. Nick-Aenderung */
162 /* Falsche Anzahl Parameter? */
163 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
165 /* "Ziel-Client" ermitteln */
166 if( Client_Type( Client ) == CLIENT_SERVER )
168 target = Client_Search( Req->prefix );
169 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
173 /* Ist der Client "restricted"? */
174 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
179 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
180 * wir nichts. So macht es das Original und mind. Snak hat probleme,
181 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
182 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
185 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
186 * will nur die Gross- und Kleinschreibung aendern. Das darf
187 * er natuerlich machen :-) */
188 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
190 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
193 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
196 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
198 /* Client-Nick registrieren */
199 Client_SetID( target, Req->argv[0] );
201 /* schon ein USER da? Dann registrieren! */
202 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
203 else Client_SetType( Client, CLIENT_GOTNICK );
208 if( Client_Conn( target ) > NONE )
211 Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
216 Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
219 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
220 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
221 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
222 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
224 /* neuen Client-Nick speichern */
225 Client_SetID( target, Req->argv[0] );
226 IRC_SetPenalty( target, 2 );
231 else if( Client_Type( Client ) == CLIENT_SERVER )
233 /* Server fuehrt neuen Client ein */
235 /* Falsche Anzahl Parameter? */
236 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
238 /* Nick ueberpruefen */
239 c = Client_Search( Req->argv[0] );
242 /* Der neue Nick ist auf diesem Server bereits registriert:
243 * sowohl der neue, als auch der alte Client muessen nun
244 * disconnectiert werden. */
245 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
246 Kill_Nick( Req->argv[0], "Nick collision" );
250 /* Server, zu dem der Client connectiert ist, suchen */
251 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
254 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
255 Kill_Nick( Req->argv[0], "Unknown server" );
259 /* Neue Client-Struktur anlegen */
260 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 );
263 /* Eine neue Client-Struktur konnte nicht angelegt werden.
264 * Der Client muss disconnectiert werden, damit der Netz-
265 * status konsistent bleibt. */
266 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
267 Kill_Nick( Req->argv[0], "Server error" );
271 modes = Client_Modes( c );
272 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": "" );
273 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": "" );
275 /* Andere Server, ausser dem Introducer, informieren */
276 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] );
280 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
285 IRC_USER( CLIENT *Client, REQUEST *Req )
287 assert( Client != NULL );
288 assert( Req != NULL );
291 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
293 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
296 /* Falsche Anzahl Parameter? */
297 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
299 Client_SetUser( Client, Req->argv[0], FALSE );
300 Client_SetInfo( Client, Req->argv[3] );
302 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
303 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
304 else Client_SetType( Client, CLIENT_GOTUSER );
307 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
309 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
311 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
316 IRC_QUIT( CLIENT *Client, REQUEST *Req )
320 assert( Client != NULL );
321 assert( Req != NULL );
323 if ( Client_Type( Client ) == CLIENT_SERVER )
327 /* Falsche Anzahl Parameter? */
328 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
330 target = Client_Search( Req->prefix );
333 /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
334 Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
338 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
339 else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
345 /* User, Service, oder noch nicht registriert */
347 /* Falsche Anzahl Parameter? */
348 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
350 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
351 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
359 IRC_PING( CLIENT *Client, REQUEST *Req )
361 CLIENT *target, *from;
363 assert( Client != NULL );
364 assert( Req != NULL );
366 /* Falsche Anzahl Parameter? */
367 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
369 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
374 /* es wurde ein Ziel-Client angegeben */
375 target = Client_Search( Req->argv[1] );
376 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
377 if( target != Client_ThisServer( ))
380 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
382 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
383 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
387 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
388 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
393 IRC_PONG( CLIENT *Client, REQUEST *Req )
395 CLIENT *target, *from;
397 assert( Client != NULL );
398 assert( Req != NULL );
400 /* Falsche Anzahl Parameter? */
401 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
402 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
407 target = Client_Search( Req->argv[1] );
408 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
409 if( target != Client_ThisServer( ))
412 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
414 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
415 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
419 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
420 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
422 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 )));
423 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
430 Hello_User( CLIENT *Client )
432 assert( Client != NULL );
434 /* Passwort ueberpruefen */
435 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
437 /* Falsches Passwort */
438 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
439 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
443 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
445 /* Andere Server informieren */
446 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 ));
448 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
449 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, TARGET_CPU, TARGET_VENDOR, TARGET_OS )) return FALSE;
450 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
451 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, USERMODES, CHANMODES )) return FALSE;
454 if( ! IRC_WriteStrClient( Client, RPL_ISUPPORT_MSG, Client_ID( Client ), CLIENT_NICK_LEN - 1, CHANNEL_TOPIC_LEN - 1, CLIENT_AWAY_LEN - 1, Conf_MaxJoins )) return DISCONNECTED;
456 Client_SetType( Client, CLIENT_USER );
458 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
459 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
461 /* Suspend the client for a second ... */
462 IRC_SetPenalty( Client, 1 );
469 Kill_Nick( CHAR *Nick, CHAR *Reason )
473 assert( Nick != NULL );
474 assert( Reason != NULL );
476 r.prefix = Client_ThisServer( );
481 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
482 IRC_KILL( Client_ThisServer( ), &r );