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ngircd-tor/src/ngircd/irc-login.c

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/*
* ngIRCd -- The Next Generation IRC Daemon
* Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
*
* Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
* der GNU General Public License (GPL), wie von der Free Software Foundation
* herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
* der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
* Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
* der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
*
* $Id: irc-login.c,v 1.13 2002/04/14 14:02:35 alex Exp $
*
* irc-login.c: Anmeldung und Abmeldung im IRC
*/
#include "portab.h"
#include "imp.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ngircd.h"
#include "conf.h"
#include "irc.h"
#include "irc-write.h"
#include "log.h"
#include "messages.h"
#include "exp.h"
#include "irc-login.h"
LOCAL BOOLEAN Hello_User( CLIENT *Client );
LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason );
GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
{
assert( Client != NULL );
assert( Req != NULL );
/* Fehler liefern, wenn kein lokaler Client */
if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
{
/* noch nicht registrierte unbekannte Verbindung */
Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
/* Passwort speichern */
Client_SetPassword( Client, Req->argv[0] );
Client_SetType( Client, CLIENT_GOTPASS );
return CONNECTED;
}
else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
{
/* noch nicht registrierte Server-Verbindung */
Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
/* Passwort speichern */
Client_SetPassword( Client, Req->argv[0] );
Client_SetType( Client, CLIENT_GOTPASSSERVER );
return CONNECTED;
}
else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
{
/* Falsche Anzahl Parameter? */
return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
}
else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
} /* IRC_PASS */
GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
{
CLIENT *intr_c, *target, *c;
CHAR *modes;
assert( Client != NULL );
assert( Req != NULL );
/* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
#ifndef STRICT_RFC
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 ))
#else
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 ))
#endif
{
/* User-Registrierung bzw. Nick-Aenderung */
/* Falsche Anzahl Parameter? */
if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* "Ziel-Client" ermitteln */
if( Client_Type( Client ) == CLIENT_SERVER )
{
target = Client_Search( Req->prefix );
if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
}
else
{
/* Ist der Client "restricted"? */
if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
target = Client;
}
#ifndef STRICT_RFC
/* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
* wir nichts. So macht es das Original und mind. Snak hat probleme,
* wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
#endif
/* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
* will nur die Gross- und Kleinschreibung aendern. Das darf
* er natuerlich machen :-) */
if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
{
if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
}
if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
{
/* Neuer Client */
Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
/* Client-Nick registrieren */
Client_SetID( target, Req->argv[0] );
/* schon ein USER da? Dann registrieren! */
if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
else Client_SetType( Client, CLIENT_GOTNICK );
}
else
{
/* Nick-Aenderung */
if( Client_Conn( target ) > NONE )
{
/* lokaler Client */
Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
}
else
{
/* Remote-Client */
Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
}
/* alle betroffenen User und Server ueber Nick-Aenderung informieren */
if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
/* neuen Client-Nick speichern */
Client_SetID( target, Req->argv[0] );
}
return CONNECTED;
}
else if( Client_Type( Client ) == CLIENT_SERVER )
{
/* Server fuehrt neuen Client ein */
/* Falsche Anzahl Parameter? */
if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* Nick ueberpruefen */
c = Client_Search( Req->argv[0] );
if( c )
{
/* Der neue Nick ist auf diesem Server bereits registriert:
* sowohl der neue, als auch der alte Client muessen nun
* disconnectiert werden. */
Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
Kill_Nick( Req->argv[0], "Nick collision" );
return CONNECTED;
}
/* Server, zu dem der Client connectiert ist, suchen */
intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
if( ! intr_c )
{
Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
Kill_Nick( Req->argv[0], "Unknown server" );
return CONNECTED;
}
/* Neue Client-Struktur anlegen */
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 );
if( ! c )
{
/* Eine neue Client-Struktur konnte nicht angelegt werden.
* Der Client muss disconnectiert werden, damit der Netz-
* status konsistent bleibt. */
Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
Kill_Nick( Req->argv[0], "Server error" );
return CONNECTED;
}
modes = Client_Modes( c );
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": "" );
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": "" );
/* Andere Server, ausser dem Introducer, informieren */
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] );
return CONNECTED;
}
else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
} /* IRC_NICK */
GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
{
assert( Client != NULL );
assert( Req != NULL );
#ifndef STRICT_RFC
if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
#else
if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
#endif
{
/* Falsche Anzahl Parameter? */
if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
Client_SetUser( Client, Req->argv[0], FALSE );
Client_SetInfo( Client, Req->argv[3] );
Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
else Client_SetType( Client, CLIENT_GOTUSER );
return CONNECTED;
}
else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
{
return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
}
else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
} /* IRC_USER */
GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
{
CLIENT *target;
assert( Client != NULL );
assert( Req != NULL );
if ( Client_Type( Client ) == CLIENT_SERVER )
{
/* Server */
/* Falsche Anzahl Parameter? */
if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
target = Client_Search( Req->prefix );
if( ! target )
{
/* Den Client kennen wir nicht (mehr), also nichts zu tun. */
Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
return CONNECTED;
}
if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
return CONNECTED;
}
else
{
/* User, Service, oder noch nicht registriert */
/* Falsche Anzahl Parameter? */
if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
return DISCONNECTED;
}
} /* IRC_QUIT */
GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
{
CLIENT *target, *from;
assert( Client != NULL );
assert( Req != NULL );
if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
/* Falsche Anzahl Parameter? */
if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
#ifdef STRICT_RFC
if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
#endif
if( Req->argc > 1 )
{
/* es wurde ein Ziel-Client angegeben */
target = Client_Search( Req->argv[1] );
if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
if( target != Client_ThisServer( ))
{
/* ok, forwarden */
if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
else from = Client;
if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
}
}
Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
} /* IRC_PING */
GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
{
CLIENT *target, *from;
assert( Client != NULL );
assert( Req != NULL );
if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
/* Falsche Anzahl Parameter? */
if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* forwarden? */
if( Req->argc == 2 )
{
target = Client_Search( Req->argv[1] );
if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
if( target != Client_ThisServer( ))
{
/* ok, forwarden */
if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
else from = Client;
if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
}
}
/* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
* aktualisiert, daher muss das hier nicht mehr gemacht werden. */
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 )));
else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
return CONNECTED;
} /* IRC_PONG */
LOCAL BOOLEAN Hello_User( CLIENT *Client )
{
assert( Client != NULL );
/* Passwort ueberpruefen */
if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
{
/* Falsches Passwort */
Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
return DISCONNECTED;
}
Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client ));
/* Andere Server informieren */
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 ));
if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )))) return FALSE;
Client_SetType( Client, CLIENT_USER );
if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
return CONNECTED;
} /* Hello_User */
LOCAL VOID Kill_Nick( CHAR *Nick, CHAR *Reason )
{
CLIENT *c;
assert( Nick != NULL );
assert( Reason != NULL );
Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
/* andere Server benachrichtigen */
IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason );
/* Ggf. einen eigenen Client toeten */
c = Client_Search( Nick );
if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE );
} /* Kill_Nick */
/* -eof- */
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