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 1.34.2.2 2003/12/04 14:13:42 alex Exp $";
27 #include "conn-func.h"
36 #include "irc-write.h"
37 #include "cvs-version.h"
40 #include "irc-login.h"
43 LOCAL BOOLEAN Hello_User PARAMS(( CLIENT *Client ));
44 LOCAL VOID Kill_Nick PARAMS(( CHAR *Nick, CHAR *Reason ));
48 IRC_PASS( CLIENT *Client, REQUEST *Req )
50 assert( Client != NULL );
51 assert( Req != NULL );
53 /* Fehler liefern, wenn kein lokaler Client */
54 if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
56 if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
58 /* noch nicht registrierte unbekannte Verbindung */
59 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
61 /* Passwort speichern */
62 Client_SetPassword( Client, Req->argv[0] );
64 Client_SetType( Client, CLIENT_GOTPASS );
67 else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
69 CHAR c2, c4, *type, *impl, *serverver, *flags, *ptr, *ircflags;
70 INT protohigh, protolow;
72 /* noch nicht registrierte Server-Verbindung */
73 Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
75 /* Passwort speichern */
76 Client_SetPassword( Client, Req->argv[0] );
78 /* Protokollversion ermitteln */
79 if( strlen( Req->argv[1] ) >= 4 )
84 Req->argv[1][4] = '\0';
85 protolow = atoi( &Req->argv[1][2] );
86 Req->argv[1][2] = '\0';
87 protohigh = atoi( Req->argv[1] );
92 else protohigh = protolow = 0;
95 if( strlen( Req->argv[1] ) > 4 ) type = &Req->argv[1][4];
98 /* IRC-Flags (nach RFC 2813) */
99 if( Req->argc >= 4 ) ircflags = Req->argv[3];
102 /* Implementation, Version und ngIRCd-Flags */
104 ptr = strchr( impl, '|' );
105 if( ptr ) *ptr = '\0';
107 if( type && ( strcmp( type, PROTOIRCPLUS ) == 0 ))
109 /* auf der anderen Seite laeuft ein Server, der
110 * ebenfalls das IRC+-Protokoll versteht */
112 flags = strchr( serverver, ':' );
119 Log( LOG_INFO, "Peer announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").", impl, serverver, protohigh, protolow, flags );
123 /* auf der anderen Seite laeuft ein Server, der
124 * nur das Originalprotokoll unterstuetzt */
126 if( strchr( ircflags, 'Z' )) flags = "Z";
128 Log( LOG_INFO, "Peer announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").", impl, protohigh, protolow, flags );
131 Client_SetType( Client, CLIENT_GOTPASSSERVER );
132 Client_SetFlags( Client, flags );
136 else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
138 /* Falsche Anzahl Parameter? */
139 return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
141 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
146 IRC_NICK( CLIENT *Client, REQUEST *Req )
148 CLIENT *intr_c, *target, *c;
151 assert( Client != NULL );
152 assert( Req != NULL );
154 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
156 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 ))
158 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 ))
161 /* User-Registrierung bzw. Nick-Aenderung */
163 /* Falsche Anzahl Parameter? */
164 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
166 /* "Ziel-Client" ermitteln */
167 if( Client_Type( Client ) == CLIENT_SERVER )
169 target = Client_Search( Req->prefix );
170 if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
174 /* Ist der Client "restricted"? */
175 if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
180 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
181 * wir nichts. So macht es das Original und mind. Snak hat probleme,
182 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
183 if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
186 /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
187 * will nur die Gross- und Kleinschreibung aendern. Das darf
188 * er natuerlich machen :-) */
189 if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
191 if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
194 if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
197 Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
199 /* Client-Nick registrieren */
200 Client_SetID( target, Req->argv[0] );
202 /* schon ein USER da? Dann registrieren! */
203 if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
204 else Client_SetType( Client, CLIENT_GOTNICK );
209 if( Client_Conn( target ) > NONE )
212 Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
217 Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
220 /* alle betroffenen User und Server ueber Nick-Aenderung informieren */
221 if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
222 IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
223 IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
225 /* neuen Client-Nick speichern */
226 Client_SetID( target, Req->argv[0] );
227 IRC_SetPenalty( target, 2 );
232 else if( Client_Type( Client ) == CLIENT_SERVER )
234 /* Server fuehrt neuen Client ein */
236 /* Falsche Anzahl Parameter? */
237 if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
239 /* Nick ueberpruefen */
240 c = Client_Search( Req->argv[0] );
243 /* Der neue Nick ist auf diesem Server bereits registriert:
244 * sowohl der neue, als auch der alte Client muessen nun
245 * disconnectiert werden. */
246 Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
247 Kill_Nick( Req->argv[0], "Nick collision" );
251 /* Server, zu dem der Client connectiert ist, suchen */
252 intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
255 Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
256 Kill_Nick( Req->argv[0], "Unknown server" );
260 /* Neue Client-Struktur anlegen */
261 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 );
264 /* Eine neue Client-Struktur konnte nicht angelegt werden.
265 * Der Client muss disconnectiert werden, damit der Netz-
266 * status konsistent bleibt. */
267 Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
268 Kill_Nick( Req->argv[0], "Server error" );
272 modes = Client_Modes( c );
273 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": "" );
274 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": "" );
276 /* Andere Server, ausser dem Introducer, informieren */
277 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] );
281 else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
286 IRC_USER( CLIENT *Client, REQUEST *Req )
288 assert( Client != NULL );
289 assert( Req != NULL );
292 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
294 if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
297 /* Falsche Anzahl Parameter? */
298 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
300 Client_SetUser( Client, Req->argv[0], FALSE );
301 Client_SetInfo( Client, Req->argv[3] );
303 Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
304 if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
305 else Client_SetType( Client, CLIENT_GOTUSER );
308 else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
310 return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
312 else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
317 IRC_QUIT( CLIENT *Client, REQUEST *Req )
321 assert( Client != NULL );
322 assert( Req != NULL );
324 if ( Client_Type( Client ) == CLIENT_SERVER )
328 /* Falsche Anzahl Parameter? */
329 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
331 target = Client_Search( Req->prefix );
334 /* Den Client kennen wir nicht (mehr), also nichts zu tun. */
335 Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
339 if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
340 else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
346 /* User, Service, oder noch nicht registriert */
348 /* Falsche Anzahl Parameter? */
349 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
351 if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
352 else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
360 IRC_PING( CLIENT *Client, REQUEST *Req )
362 CLIENT *target, *from;
364 assert( Client != NULL );
365 assert( Req != NULL );
367 /* Falsche Anzahl Parameter? */
368 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
370 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
375 /* es wurde ein Ziel-Client angegeben */
376 target = Client_Search( Req->argv[1] );
377 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
378 if( target != Client_ThisServer( ))
381 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
383 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
384 return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
388 Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
389 return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
394 IRC_PONG( CLIENT *Client, REQUEST *Req )
396 CLIENT *target, *from;
398 assert( Client != NULL );
399 assert( Req != NULL );
401 /* Falsche Anzahl Parameter? */
402 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
403 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
408 target = Client_Search( Req->argv[1] );
409 if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
410 if( target != Client_ThisServer( ))
413 if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
415 if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
416 return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
420 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
421 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
423 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 )));
424 else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
431 Hello_User( CLIENT *Client )
434 CHAR ver[12], vertxt[30];
437 assert( Client != NULL );
439 /* Check password ... */
440 if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
443 Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
444 Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
448 Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
450 /* Inform other servers */
451 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 ));
454 if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
456 /* Version and system type */
458 strlcpy( ver, CVSDATE, sizeof( ver ));
459 strncpy( ver + 4, ver + 5, 2 );
460 strncpy( ver + 6, ver + 8, 3 );
461 snprintf( vertxt, sizeof( vertxt ), "%s(%s)", PACKAGE_VERSION, ver );
462 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), vertxt, TARGET_CPU, TARGET_VENDOR, TARGET_OS )) return FALSE;
464 if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, TARGET_CPU, TARGET_VENDOR, TARGET_OS )) return FALSE;
467 if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
469 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), vertxt, USERMODES, CHANMODES )) return FALSE;
471 if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, USERMODES, CHANMODES )) return FALSE;
475 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;
477 Client_SetType( Client, CLIENT_USER );
479 if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
480 if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
482 /* Suspend the client for a second ... */
483 IRC_SetPenalty( Client, 1 );
490 Kill_Nick( CHAR *Nick, CHAR *Reason )
494 assert( Nick != NULL );
495 assert( Reason != NULL );
497 r.prefix = Client_ThisServer( );
502 Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
503 IRC_KILL( Client_ThisServer( ), &r );