516 lines
18 KiB
C
516 lines
18 KiB
C
/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* Please read the file COPYING, README and AUTHORS for more information.
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*
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* Login and logout
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*/
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#include "portab.h"
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static char UNUSED id[] = "$Id: irc-login.c,v 1.37 2003/12/27 13:01:12 alex Exp $";
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#include "imp.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ngircd.h"
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#include "resolve.h"
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#include "conn-func.h"
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#include "conf.h"
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#include "client.h"
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#include "channel.h"
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#include "log.h"
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#include "messages.h"
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#include "parse.h"
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#include "irc.h"
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#include "irc-info.h"
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#include "irc-write.h"
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#include "cvs-version.h"
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#include "exp.h"
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#include "irc-login.h"
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LOCAL BOOLEAN Hello_User PARAMS(( CLIENT *Client ));
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LOCAL VOID Kill_Nick PARAMS(( CHAR *Nick, CHAR *Reason ));
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GLOBAL BOOLEAN
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IRC_PASS( CLIENT *Client, REQUEST *Req )
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{
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assert( Client != NULL );
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assert( Req != NULL );
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/* Fehler liefern, wenn kein lokaler Client */
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if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
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if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1))
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{
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/* noch nicht registrierte unbekannte Verbindung */
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Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client ));
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/* Passwort speichern */
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Client_SetPassword( Client, Req->argv[0] );
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Client_SetType( Client, CLIENT_GOTPASS );
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return CONNECTED;
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}
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else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 )))
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{
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CHAR c2, c4, *type, *impl, *serverver, *flags, *ptr, *ircflags;
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INT protohigh, protolow;
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/* noch nicht registrierte Server-Verbindung */
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Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client ));
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/* Passwort speichern */
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Client_SetPassword( Client, Req->argv[0] );
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/* Protokollversion ermitteln */
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if( strlen( Req->argv[1] ) >= 4 )
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{
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c2 = Req->argv[1][2];
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c4 = Req->argv[1][4];
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Req->argv[1][4] = '\0';
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protolow = atoi( &Req->argv[1][2] );
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Req->argv[1][2] = '\0';
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protohigh = atoi( Req->argv[1] );
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Req->argv[1][2] = c2;
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Req->argv[1][4] = c4;
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}
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else protohigh = protolow = 0;
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/* Protokoll-Typ */
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if( strlen( Req->argv[1] ) > 4 ) type = &Req->argv[1][4];
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else type = NULL;
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/* IRC-Flags (nach RFC 2813) */
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if( Req->argc >= 4 ) ircflags = Req->argv[3];
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else ircflags = "";
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/* Implementation, Version und ngIRCd-Flags */
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impl = Req->argv[2];
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ptr = strchr( impl, '|' );
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if( ptr ) *ptr = '\0';
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if( type && ( strcmp( type, PROTOIRCPLUS ) == 0 ))
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{
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/* auf der anderen Seite laeuft ein Server, der
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* ebenfalls das IRC+-Protokoll versteht */
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serverver = ptr + 1;
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flags = strchr( serverver, ':' );
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if( flags )
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{
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*flags = '\0';
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flags++;
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}
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else flags = "";
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Log( LOG_INFO, "Peer announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").", impl, serverver, protohigh, protolow, flags );
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}
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else
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{
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/* auf der anderen Seite laeuft ein Server, der
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* nur das Originalprotokoll unterstuetzt */
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serverver = "";
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if( strchr( ircflags, 'Z' )) flags = "Z";
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else flags = "";
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Log( LOG_INFO, "Peer announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").", impl, protohigh, protolow, flags );
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}
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Client_SetType( Client, CLIENT_GOTPASSSERVER );
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Client_SetFlags( Client, flags );
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return CONNECTED;
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}
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else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER ))
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{
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/* Falsche Anzahl Parameter? */
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return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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}
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else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
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} /* IRC_PASS */
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GLOBAL BOOLEAN
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IRC_NICK( CLIENT *Client, REQUEST *Req )
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{
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CLIENT *intr_c, *target, *c;
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CHAR *modes;
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assert( Client != NULL );
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assert( Req != NULL );
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/* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
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#ifndef STRICT_RFC
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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 ))
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#else
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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 ))
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#endif
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{
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/* User-Registrierung bzw. Nick-Aenderung */
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/* Falsche Anzahl Parameter? */
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if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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/* "Ziel-Client" ermitteln */
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if( Client_Type( Client ) == CLIENT_SERVER )
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{
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target = Client_Search( Req->prefix );
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if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
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}
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else
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{
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/* Ist der Client "restricted"? */
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if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
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target = Client;
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}
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#ifndef STRICT_RFC
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/* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
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* wir nichts. So macht es das Original und mind. Snak hat probleme,
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* wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
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if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED;
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#endif
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/* pruefen, ob Nick bereits vergeben. Speziallfall: der Client
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* will nur die Gross- und Kleinschreibung aendern. Das darf
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* er natuerlich machen :-) */
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if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
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{
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if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED;
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}
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if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
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{
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/* Neuer Client */
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Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client ));
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/* Client-Nick registrieren */
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Client_SetID( target, Req->argv[0] );
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/* schon ein USER da? Dann registrieren! */
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if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
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else Client_SetType( Client, CLIENT_GOTNICK );
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}
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else
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{
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/* Nick-Aenderung */
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if( Client_Conn( target ) > NONE )
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{
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/* lokaler Client */
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Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] );
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}
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else
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{
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/* Remote-Client */
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Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
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}
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/* alle betroffenen User und Server ueber Nick-Aenderung informieren */
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if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] );
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IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] );
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IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] );
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/* neuen Client-Nick speichern */
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Client_SetID( target, Req->argv[0] );
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IRC_SetPenalty( target, 2 );
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}
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return CONNECTED;
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}
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else if( Client_Type( Client ) == CLIENT_SERVER )
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{
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/* Server fuehrt neuen Client ein */
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/* Falsche Anzahl Parameter? */
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if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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/* Nick ueberpruefen */
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c = Client_Search( Req->argv[0] );
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if( c )
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{
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/* Der neue Nick ist auf diesem Server bereits registriert:
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* sowohl der neue, als auch der alte Client muessen nun
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* disconnectiert werden. */
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Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
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Kill_Nick( Req->argv[0], "Nick collision" );
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return CONNECTED;
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}
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/* Server, zu dem der Client connectiert ist, suchen */
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intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] ));
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if( ! intr_c )
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{
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Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
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Kill_Nick( Req->argv[0], "Unknown server" );
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return CONNECTED;
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}
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/* Neue Client-Struktur anlegen */
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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 );
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if( ! c )
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{
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/* Eine neue Client-Struktur konnte nicht angelegt werden.
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* Der Client muss disconnectiert werden, damit der Netz-
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* status konsistent bleibt. */
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Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
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Kill_Nick( Req->argv[0], "Server error" );
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return CONNECTED;
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}
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modes = Client_Modes( c );
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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": "" );
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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": "" );
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/* Andere Server, ausser dem Introducer, informieren */
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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] );
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return CONNECTED;
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}
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else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
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} /* IRC_NICK */
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GLOBAL BOOLEAN
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IRC_USER( CLIENT *Client, REQUEST *Req )
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{
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#ifdef IDENTAUTH
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CHAR *ptr;
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#endif
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assert( Client != NULL );
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assert( Req != NULL );
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#ifndef STRICT_RFC
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if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN )
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#else
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if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS )
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#endif
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{
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/* Falsche Anzahl Parameter? */
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if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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#ifdef IDENTAUTH
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ptr = Client_User( Client );
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if( ! ptr || ! *ptr || *ptr == '~' )
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#endif
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Client_SetUser( Client, Req->argv[0], FALSE );
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Client_SetInfo( Client, Req->argv[3] );
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Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client ));
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if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client );
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else Client_SetType( Client, CLIENT_GOTUSER );
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return CONNECTED;
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}
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else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE )
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{
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return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
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}
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else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
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} /* IRC_USER */
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GLOBAL BOOLEAN
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IRC_QUIT( CLIENT *Client, REQUEST *Req )
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{
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CLIENT *target;
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assert( Client != NULL );
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assert( Req != NULL );
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if ( Client_Type( Client ) == CLIENT_SERVER )
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{
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/* Server */
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/* Falsche Anzahl Parameter? */
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if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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target = Client_Search( Req->prefix );
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if( ! target )
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{
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/* Den Client kennen wir nicht (mehr), also nichts zu tun. */
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Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
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return CONNECTED;
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}
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if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE );
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else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE );
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return CONNECTED;
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}
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else
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{
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/* User, Service, oder noch nicht registriert */
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/* Falsche Anzahl Parameter? */
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if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE );
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else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE );
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return DISCONNECTED;
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}
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} /* IRC_QUIT */
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GLOBAL BOOLEAN
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IRC_PING( CLIENT *Client, REQUEST *Req )
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{
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CLIENT *target, *from;
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assert( Client != NULL );
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assert( Req != NULL );
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/* Falsche Anzahl Parameter? */
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if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
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#ifdef STRICT_RFC
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if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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#endif
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if( Req->argc > 1 )
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{
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/* es wurde ein Ziel-Client angegeben */
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target = Client_Search( Req->argv[1] );
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if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
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if( target != Client_ThisServer( ))
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{
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/* ok, forwarden */
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if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
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else from = Client;
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if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
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return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] );
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}
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}
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Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client ));
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return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client ));
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} /* IRC_PING */
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GLOBAL BOOLEAN
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IRC_PONG( CLIENT *Client, REQUEST *Req )
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{
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CLIENT *target, *from;
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assert( Client != NULL );
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assert( Req != NULL );
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/* Falsche Anzahl Parameter? */
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if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client ));
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if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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/* forwarden? */
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if( Req->argc == 2 )
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{
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target = Client_Search( Req->argv[1] );
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if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] );
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if( target != Client_ThisServer( ))
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{
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/* ok, forwarden */
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if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
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else from = Client;
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if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix );
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return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] );
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}
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}
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/* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
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* aktualisiert, daher muss das hier nicht mehr gemacht werden. */
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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 )));
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else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
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return CONNECTED;
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} /* IRC_PONG */
|
|
|
|
|
|
LOCAL BOOLEAN
|
|
Hello_User( CLIENT *Client )
|
|
{
|
|
#ifdef CVSDATE
|
|
CHAR ver[12], vertxt[30];
|
|
#endif
|
|
|
|
assert( Client != NULL );
|
|
|
|
/* Check password ... */
|
|
if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 )
|
|
{
|
|
/* Bad password! */
|
|
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 ));
|
|
|
|
/* Inform other servers */
|
|
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 ));
|
|
|
|
/* Welcome :-) */
|
|
if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE;
|
|
|
|
/* Version and system type */
|
|
#ifdef CVSDATE
|
|
strlcpy( ver, CVSDATE, sizeof( ver ));
|
|
strncpy( ver + 4, ver + 5, 2 );
|
|
strncpy( ver + 6, ver + 8, 3 );
|
|
snprintf( vertxt, sizeof( vertxt ), "%s(%s)", PACKAGE_VERSION, ver );
|
|
if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), vertxt, TARGET_CPU, TARGET_VENDOR, TARGET_OS )) return FALSE;
|
|
#else
|
|
if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, TARGET_CPU, TARGET_VENDOR, TARGET_OS )) return FALSE;
|
|
#endif
|
|
|
|
if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE;
|
|
#ifdef CVSDATE
|
|
if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), vertxt, USERMODES, CHANMODES )) return FALSE;
|
|
#else
|
|
if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), PACKAGE_VERSION, USERMODES, CHANMODES )) return FALSE;
|
|
#endif
|
|
|
|
/* Features */
|
|
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;
|
|
|
|
Client_SetType( Client, CLIENT_USER );
|
|
|
|
if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED;
|
|
if( ! IRC_Show_MOTD( Client )) return DISCONNECTED;
|
|
|
|
/* Suspend the client for a second ... */
|
|
IRC_SetPenalty( Client, 1 );
|
|
|
|
return CONNECTED;
|
|
} /* Hello_User */
|
|
|
|
|
|
LOCAL VOID
|
|
Kill_Nick( CHAR *Nick, CHAR *Reason )
|
|
{
|
|
REQUEST r;
|
|
|
|
assert( Nick != NULL );
|
|
assert( Reason != NULL );
|
|
|
|
r.prefix = Client_ThisServer( );
|
|
r.argv[0] = Nick;
|
|
r.argv[1] = Reason;
|
|
r.argc = 2;
|
|
|
|
Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason );
|
|
IRC_KILL( Client_ThisServer( ), &r );
|
|
} /* Kill_Nick */
|
|
|
|
|
|
/* -eof- */
|