X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Firc.c;h=5288a8ce7f9b81455542cff80da962b276a06bbb;hp=d6ddac5866f19110d7c2a625c2ff2795ef09c284;hb=d38d153f;hpb=428cc6258fbe3745d04064102900c5129389f0d7

diff --git a/src/ngircd/irc.c b/src/ngircd/irc.c
index d6ddac58..37df0687 100644
--- a/src/ngircd/irc.c
+++ b/src/ngircd/irc.c
@@ -1,1282 +1,738 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
  *
- * 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.c,v 1.34 2002/01/09 01:09:58 alex Exp $
- *
- * irc.c: IRC-Befehle
- *
- * $Log: irc.c,v $
- * Revision 1.34  2002/01/09 01:09:58  alex
- * - WHOIS wird im "Strict-RFC-Mode" nicht mehr automatisch geforwarded,
- * - andere Server werden nun ueber bisherige Server und User informiert.
- *
- * Revision 1.33  2002/01/07 23:42:12  alex
- * - Es werden fuer alle Server eigene Token generiert,
- * - QUIT von einem Server fuer einen User wird an andere Server geforwarded,
- * - ebenso NICK-Befehle, die "fremde" User einfuehren.
- *
- * Revision 1.32  2002/01/07 16:02:36  alex
- * - Loglevel von Remote-Mode-Aenderungen angepasst (nun Debug).
- * - Im Debug-Mode werden nun auch PING's protokolliert.
- *
- * Revision 1.31  2002/01/07 15:39:46  alex
- * - Server nimmt nun Server-Links an: PASS und SERVER entsprechend angepasst.
- * - MODE und NICK melden nun die Aenderungen an andere Server.
- *
- * Revision 1.30  2002/01/06 15:21:29  alex
- * - Loglevel und Meldungen nochmals ueberarbeitet.
- * - QUIT und SQUIT forwarden nun den Grund der Trennung,
- * - WHOIS wird nun immer an den "Original-Server" weitergeleitet.
- *
- * Revision 1.29  2002/01/05 23:24:54  alex
- * - WHOIS erweitert: Anfragen koennen an andere Server weitergeleitet werden.
- * - Vorbereitungen fuer Ident-Abfragen bei neuen Client-Strukturen.
- *
- * Revision 1.28  2002/01/05 20:08:02  alex
- * - Div. Aenderungen fuer die Server-Links (u.a. WHOIS, QUIT, NICK angepasst).
- * - Neue Funktionen IRC_WriteStrServer() und IRC_WriteStrServerPrefix().
- *
- * Revision 1.27  2002/01/05 19:15:03  alex
- * - Fehlerpruefung bei select() in der "Hauptschleife" korrigiert.
- *
- * Revision 1.26  2002/01/05 16:51:18  alex
- * - das Passwort von Servern wird nun ueberprueft (PASS- und SERVER-Befehl).
- *
- * Revision 1.25  2002/01/05 00:48:33  alex
- * - bei SQUIT wurde immer die Verbindung getrennt, auch bei Remote-Servern.
- *
- * Revision 1.24  2002/01/04 17:58:44  alex
- * - IRC_WriteStrXXX()-Funktionen eingefuehrt, groessere Anpassungen daran.
- * - neuer Befehl SQUIT, QUIT an Server-Links angepasst.
- *
- * Revision 1.23  2002/01/04 01:36:40  alex
- * - Loglevel ein wenig angepasst.
- *
- * Revision 1.22  2002/01/04 01:21:47  alex
- * - Client-Strukruren werden nur noch ueber Funktionen angesprochen.
- * - Weitere Anpassungen und Erweiterungen der Server-Links.
- *
- * Revision 1.21  2002/01/03 02:26:51  alex
- * - neue Befehle SERVER und NJOIN begonnen,
- * - begonnen, diverse IRC-Befehle an Server-Links anzupassen.
- *
- * Revision 1.20  2002/01/02 12:46:41  alex
- * - die Gross- und Kleinschreibung des Nicks kann mit NICK nun geaendert werden.
- *
- * Revision 1.19  2002/01/02 02:51:39  alex
- * - Copyright-Texte angepasst.
- * - neuer Befehl "ERROR".
- *
- * Revision 1.17  2001/12/31 15:33:13  alex
- * - neuer Befehl NAMES, kleinere Bugfixes.
- * - Bug bei PING behoben: war zu restriktiv implementiert :-)
- *
- * Revision 1.16  2001/12/31 02:18:51  alex
- * - viele neue Befehle (WHOIS, ISON, OPER, DIE, RESTART),
- * - neuen Header "defines.h" mit (fast) allen Konstanten.
- * - Code Cleanups und viele "kleine" Aenderungen & Bugfixes.
- *
- * Revision 1.15  2001/12/30 19:26:11  alex
- * - Unterstuetzung fuer die Konfigurationsdatei eingebaut.
- *
- * Revision 1.14  2001/12/30 11:42:00  alex
- * - der Server meldet nun eine ordentliche "Start-Zeit".
- *
- * Revision 1.13  2001/12/29 03:10:06  alex
- * - Neue Funktion IRC_MODE() implementiert, div. Aenderungen.
- * - neue configure-Optione "--enable-strict-rfc".
- *
- * Revision 1.12  2001/12/27 19:17:26  alex
- * - neue Befehle PRIVMSG, NOTICE, PING.
- *
- * Revision 1.11  2001/12/27 16:55:41  alex
- * - neu: IRC_WriteStrRelated(), Aenderungen auch in IRC_WriteStrClient().
- *
- * Revision 1.10  2001/12/26 22:48:53  alex
- * - MOTD-Datei ist nun konfigurierbar und wird gelesen.
- *
- * Revision 1.9  2001/12/26 14:45:37  alex
- * - "Code Cleanups".
- *
- * Revision 1.8  2001/12/26 03:21:46  alex
- * - PING/PONG-Befehle implementiert,
- * - Meldungen ueberarbeitet: enthalten nun (fast) immer den Nick.
- *
- * Revision 1.7  2001/12/25 23:25:18  alex
- * - und nochmal Aenderungen am Logging ;-)
- *
- * Revision 1.6  2001/12/25 23:13:33  alex
- * - Debug-Meldungen angepasst.
- *
- * Revision 1.5  2001/12/25 22:02:42  alex
- * - neuer IRC-Befehl "/QUIT". Verbessertes Logging & Debug-Ausgaben.
- *
- * Revision 1.4  2001/12/25 19:19:30  alex
- * - bessere Fehler-Abfragen, diverse Bugfixes.
- * - Nicks werden nur einmal vergeben :-)
- * - /MOTD wird unterstuetzt.
- *
- * Revision 1.3  2001/12/24 01:34:06  alex
- * - USER und NICK wird nun in beliebiger Reihenfolge akzeptiert (wg. BitchX)
- * - MOTD-Ausgabe begonnen zu implementieren.
- *
- * Revision 1.2  2001/12/23 21:57:16  alex
- * - erste IRC-Befehle zu implementieren begonnen.
- *
- * Revision 1.1  2001/12/14 08:13:43  alex
- * - neues Modul begonnen :-)
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * Please read the file COPYING, README and AUTHORS for more information.
  */
 
+#include "portab.h"
 
-#include <portab.h>
-#include "global.h"
+/**
+ * @file
+ * IRC commands
+ */
 
-#include <imp.h>
+#include "imp.h"
 #include <assert.h>
-#include <errno.h>
-#include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 
 #include "ngircd.h"
-#include "client.h"
+#include "conn-func.h"
 #include "conf.h"
-#include "conn.h"
+#include "channel.h"
+#include "conn-encoding.h"
+#include "defines.h"
+#include "irc-write.h"
 #include "log.h"
+#include "match.h"
 #include "messages.h"
 #include "parse.h"
 #include "tool.h"
 
-#include <exp.h>
+#include "exp.h"
 #include "irc.h"
 
 
-#define CONNECTED TRUE
-#define DISCONNECTED FALSE
-
-
-LOCAL BOOLEAN Hello_User( CLIENT *Client );
-LOCAL BOOLEAN Show_MOTD( CLIENT *Client );
-
-LOCAL VOID Kill_Nick( CHAR *Nick );
-
-
-GLOBAL VOID IRC_Init( VOID )
-{
-} /* IRC_Init */
-
-
-GLOBAL VOID IRC_Exit( VOID )
-{
-} /* IRC_Exit */
-
-
-GLOBAL BOOLEAN IRC_WriteStrClient( CLIENT *Client, CHAR *Format, ... )
-{
-	CHAR buffer[1000];
-	BOOLEAN ok = CONNECTED;
-	va_list ap;
-
-	assert( Client != NULL );
-	assert( Format != NULL );
-
-	va_start( ap, Format );
-	vsnprintf( buffer, 1000, Format, ap );
-	va_end( ap );
-
-	/* an den Client selber */
-	ok = IRC_WriteStrClientPrefix( Client, Client_ThisServer( ), buffer );
-
-	return ok;
-} /* IRC_WriteStrClient */
-
-
-GLOBAL BOOLEAN IRC_WriteStrClientPrefix( CLIENT *Client, CLIENT *Prefix, CHAR *Format, ... )
-{
-	/* Text an Clients, lokal bzw. remote, senden. */
-
-	CHAR buffer[1000];
-	va_list ap;
-
-	assert( Client != NULL );
-	assert( Format != NULL );
-	assert( Prefix != NULL );
-
-	va_start( ap, Format );
-	vsnprintf( buffer, 1000, Format, ap );
-	va_end( ap );
+static char *Option_String PARAMS((CONN_ID Idx));
+static bool Send_Message PARAMS((CLIENT *Client, REQUEST *Req, int ForceType,
+				 bool SendErrors));
+static bool Send_Message_Mask PARAMS((CLIENT *from, char *command,
+				      char *targetMask, char *message,
+				      bool SendErrors));
+static bool Help PARAMS((CLIENT *Client, const char *Topic));
 
-	return Conn_WriteStr( Client_Conn( Client_NextHop( Client )), ":%s %s", Client_ID( Prefix ), buffer );
-} /* IRC_WriteStrClientPrefix */
 
-
-GLOBAL BOOLEAN IRC_WriteStrRelated( CLIENT *Client, CHAR *Format, ... )
-{
-	CHAR buffer[1000];
-	BOOLEAN ok = CONNECTED;
-	va_list ap;
-
-	assert( Client != NULL );
-	assert( Format != NULL );
-
-	va_start( ap, Format );
-	vsnprintf( buffer, 1000, Format, ap );
-	va_end( ap );
-
-	/* an den Client selber */
-	ok = IRC_WriteStrClient( Client, buffer );
-
-	/* FIXME */
-	
-	return ok;
-} /* IRC_WriteStrRelated */
-
-
-GLOBAL VOID IRC_WriteStrServers( CLIENT *ExceptOf, CHAR *Format, ... )
+/**
+ * Check if a list limit is reached and inform client accordingly.
+ *
+ * @param From The client.
+ * @param Count Reply item count.
+ * @param Limit Reply limit.
+ * @param Name Name of the list.
+ * @return true if list limit has been reached; false otherwise.
+ */
+GLOBAL bool
+IRC_CheckListTooBig(CLIENT *From, const int Count, const int Limit,
+		    const char *Name)
 {
-	CHAR buffer[1000];
-	va_list ap;
+	assert(From != NULL);
+	assert(Count >= 0);
+	assert(Limit > 0);
+	assert(Name != NULL);
 
-	assert( Format != NULL );
+	if (Count < Limit)
+		return false;
 
-	va_start( ap, Format );
-	vsnprintf( buffer, 1000, Format, ap );
-	va_end( ap );
-
-	/* an den Client selber */
-	return IRC_WriteStrServersPrefix( ExceptOf, Client_ThisServer( ), buffer );
-} /* IRC_WriteStrServers */
-
-
-GLOBAL VOID IRC_WriteStrServersPrefix( CLIENT *ExceptOf, CLIENT *Prefix, CHAR *Format, ... )
-{
-	CHAR buffer[1000];
-	CLIENT *c;
-	va_list ap;
-	
-	assert( Format != NULL );
-	assert( Prefix != NULL );
-
-	va_start( ap, Format );
-	vsnprintf( buffer, 1000, Format, ap );
-	va_end( ap );
-	
-	c = Client_First( );
-	while( c )
-	{
-		if(( Client_Type( c ) == CLIENT_SERVER ) && ( Client_Conn( c ) > NONE ) && ( c != Client_ThisServer( )) && ( c != ExceptOf ))
-		{
-			/* Ziel-Server gefunden */
-			IRC_WriteStrClientPrefix( c, Prefix, buffer );
-		}
-		c = Client_Next( c );
-	}
-} /* IRC_WriteStrServersPrefix */
+	(void)IRC_WriteStrClient(From,
+				 "NOTICE %s :%s list limit (%d) reached!",
+				 Client_ID(From), Name, Limit);
+	IRC_SetPenalty(From, 2);
+	return true;
+}
 
 
-GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
+GLOBAL bool
+IRC_ERROR( 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 );
+	if (Client_Type(Client) != CLIENT_GOTPASS
+	    && Client_Type(Client) != CLIENT_GOTPASS_2813
+	    && Client_Type(Client) != CLIENT_UNKNOWNSERVER
+	    && Client_Type(Client) != CLIENT_SERVER
+	    && Client_Type(Client) != CLIENT_SERVICE) {
+		LogDebug("Ignored ERROR command from \"%s\" ...",
+			 Client_Mask(Client));
+		IRC_SetPenalty(Client, 2);
 		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] );
+	if (Req->argc < 1)
+		Log(LOG_NOTICE, "Got ERROR from \"%s\"!",
+		    Client_Mask(Client));
+	else
+		Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!",
+		    Client_Mask(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 */
+	return CONNECTED;
+} /* IRC_ERROR */
 
 
-GLOBAL BOOLEAN IRC_SERVER( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC "KILL" command.
+ *
+ * This function implements the IRC command "KILL" wich is used to selectively
+ * disconnect clients. It can be used by IRC operators and servers, for example
+ * to "solve" nick collisions after netsplits. See RFC 2812 section 3.7.1.
+ *
+ * Please note that this function is also called internally, without a real
+ * KILL command being received over the network! Client is Client_ThisServer()
+ * in this case, and the prefix in Req is NULL.
+ *
+ * @param Client	The client from which this command has been received
+ *			or Client_ThisServer() when generated interanlly.
+ * @param Req		Request structure with prefix and all parameters.
+ * @returns		CONNECTED or DISCONNECTED.
+ */
+GLOBAL bool
+IRC_KILL( CLIENT *Client, REQUEST *Req )
 {
-	CHAR str[LINE_LEN], *ptr;
-	BOOLEAN ok;
-	CLIENT *c;
-	INT i;
-	
-	assert( Client != NULL );
-	assert( Req != NULL );
+	CLIENT *prefix, *c;
+	char reason[COMMAND_LEN], *msg;
+	CONN_ID my_conn, conn;
 
-	/* Fehler liefern, wenn kein lokaler Client */
-	if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
+	assert (Client != NULL);
+	assert (Req != NULL);
 
-	if( Client_Type( Client ) == CLIENT_GOTPASSSERVER )
-	{
-		/* Verbindung soll als Server-Server-Verbindung registriert werden */
-		Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
+	if (Client_Type(Client) != CLIENT_SERVER && !Client_OperByMe(Client))
+		return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
+					  Client_ID(Client));
 
-		/* Falsche Anzahl Parameter? */
-		if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+	if (Req->argc != 2)
+		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
+					  Client_ID(Client), Req->command);
 
-		/* Ist dieser Server bei uns konfiguriert? */
-		for( i = 0; i < Conf_Server_Count; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
-		if( i >= Conf_Server_Count )
-		{
-			/* Server ist nicht konfiguriert! */
-			Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
-			Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", TRUE );
-			return DISCONNECTED;
-		}
-		if( strcmp( Client_Password( Client ), Conf_Server[i].pwd ) != 0 )
-		{
-			/* Falsches Passwort */
-			Log( LOG_ERR, "Connection %d: Bad password for server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
-			Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
-			return DISCONNECTED;
-		}
-		
-		/* Ist ein Server mit dieser ID bereits registriert? */
-		if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
-
-		/* Server-Strukturen fuellen ;-) */
-		Client_SetID( Client, Req->argv[0] );
-		Client_SetHops( Client, 1 );
-		Client_SetInfo( Client, Req->argv[Req->argc - 1] );
-		
-		/* Meldet sich der Server bei uns an? */
-		if( Req->argc == 2 )
-		{
-			/* Unseren SERVER- und PASS-Befehl senden */
-			ok = TRUE;
-			if( ! IRC_WriteStrClient( Client, "PASS %s "PASSSERVERADD, Conf_Server[i].pwd )) ok = FALSE;
-			else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
-			if( ! ok )
-			{
-				Conn_Close( Client_Conn( Client ), "Unexpected server behavior!", NULL, FALSE );
-				return DISCONNECTED;
-			}
-			Client_SetIntroducer( Client, Client );
-			Client_SetToken( Client, 1 );
-		}
-		else  Client_SetToken( Client, atoi( Req->argv[1] ));
+	/* Get prefix (origin); use the client if no prefix is given. */
+	if (Req->prefix)
+		prefix = Client_Search(Req->prefix);
+	else
+		prefix = Client;
+
+	/* Log a warning message and use this server as origin when the
+	 * prefix (origin) is invalid. */
+	if (!prefix) {
+		Log(LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
+		    Req->prefix );
+		prefix = Client_ThisServer();
+	}
+
+	if (Client != Client_ThisServer())
+		Log(LOG_NOTICE|LOG_snotice,
+		    "Got KILL command from \"%s\" for \"%s\": \"%s\".",
+		    Client_Mask(prefix), Req->argv[0], Req->argv[1]);
+
+	/* Build reason string: Prefix the "reason" if the originator is a
+	 * regular user, so users can't spoof KILLs of servers. */
+	if (Client_Type(Client) == CLIENT_USER)
+		snprintf(reason, sizeof(reason), "KILLed by %s: %s",
+			 Client_ID(Client), Req->argv[1]);
+	else
+		strlcpy(reason, Req->argv[1], sizeof(reason));
 
-		Log( LOG_NOTICE, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), Client_Conn( Client ));
+	/* Inform other servers */
+	IRC_WriteStrServersPrefix(Client, prefix, "KILL %s :%s",
+				  Req->argv[0], reason);
 
-		Client_SetType( Client, CLIENT_SERVER );
+	/* Save ID of this connection */
+	my_conn = Client_Conn( Client );
 
-		/* Alle bisherigen Server dem neuen Server bekannt machen,
-		 * die bisherigen Server ueber den neuen informierenn */
-		c = Client_First( );
-		while( c )
+	/* Do we host such a client? */
+	c = Client_Search( Req->argv[0] );
+	if( c )
+	{
+		if(( Client_Type( c ) != CLIENT_USER ) &&
+		   ( Client_Type( c ) != CLIENT_GOTNICK ))
 		{
-			if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )))
-			{
-				if( Client_Conn( c ) > NONE )
-				{
-					/* Dem gefundenen Server gleich den neuen
-					* Server bekannt machen */
-					if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
-				}
-				
-				/* Den neuen Server ueber den alten informieren */
-				if( ! IRC_WriteStrClientPrefix( Client, Client_Introducer( c ), "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ))) return DISCONNECTED;
-			}
-			c = Client_Next( c );
-		}
+			/* Target of this KILL is not a regular user, this is
+			 * invalid! So we ignore this case if we received a
+			 * regular KILL from the network and try to kill the
+			 * client/connection anyway (but log an error!) if the
+			 * origin is the local server. */
 
-		/* alle User dem neuen Server bekannt machen */
-		c = Client_First( );
-		while( c )
-		{
-			if( Client_Type( c ) == CLIENT_USER )
+			if( Client != Client_ThisServer( ))
 			{
-				/* User an neuen Server melden */
-				if( ! IRC_WriteStrClient( Client, "NICK %s %d %s %s %d +%s :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_User( c ), Client_Hostname( c ), Client_MyToken( Client_Introducer( c )), Client_Modes( c ), Client_Info( c ))) return DISCONNECTED;
+				/* Invalid KILL received from remote */
+				if( Client_Type( c ) == CLIENT_SERVER )
+					msg = ERR_CANTKILLSERVER_MSG;
+				else
+					msg = ERR_NOPRIVILEGES_MSG;
+				return IRC_WriteStrClient( Client, msg,
+					Client_ID( Client ));
 			}
-			c = Client_Next( c );
-		}
-		
-		return CONNECTED;
-	}
-	else if( Client_Type( Client ) == CLIENT_SERVER )
-	{
-		/* Neuer Server wird im Netz angekuendigt */
-
-		/* Falsche Anzahl Parameter? */
-		if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-		/* Ist ein Server mit dieser ID bereits registriert? */
-		if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
 
-		/* Ueberfluessige Hostnamen aus Info-Text entfernen */
-		ptr = strchr( Req->argv[3] + 2, '[' );
-		if( ! ptr ) ptr = Req->argv[3];
-
-		/* Neue Client-Struktur anlegen */
-		c = Client_NewRemoteServer( Client, Req->argv[0], atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, TRUE );
-		if( ! c )
-		{
-			/* Neue Client-Struktur konnte nicht angelegt werden */
-			Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
-			Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", TRUE );
-			return DISCONNECTED;
+			Log( LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!",
+			     Client_Type( c ), Req->argv[0] );
 		}
 
-		/* Log-Meldung zusammenbauen und ausgeben */
-		if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) sprintf( str, "connected to %s, ", Req->prefix );
-		else strcpy( str, "" );
-		Log( LOG_NOTICE, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
-		
-		return CONNECTED;
-	}
-	else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-} /* IRC_SERVER */
-
-
-GLOBAL BOOLEAN IRC_NJOIN( CLIENT *Client, REQUEST *Req )
-{
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_SERVER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTEREDSERVER_MSG, Client_ID( Client ));
-
-	return CONNECTED;
-} /* IRC_NJOIN */
-
-
-GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
-{
-	CLIENT *intr_c, *target, *c;
-
-	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_GetFromID( Req->prefix );
-			if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
-		}
+		/* Kill the client NOW:
+		 *  - Close the local connection (if there is one),
+		 *  - Destroy the CLIENT structure for remote clients.
+		 * Note: Conn_Close() removes the CLIENT structure as well. */
+		conn = Client_Conn( c );
+		if(conn > NONE)
+			Conn_Close(conn, NULL, reason, true);
 		else
-		{
-			/* Ist der Client "restricted"? */
-			if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client ));
-			target = Client;
-		}
-
-		/* 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 ... */
-#ifndef STRICT_RFC
-		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( Client ) == CLIENT_USER )
-		{
-			/* Nick-Aenderung: allen mitteilen! */
-			Log( LOG_INFO, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
-			IRC_WriteStrRelated( Client, "NICK :%s", Req->argv[0] );
-			IRC_WriteStrServersPrefix( NULL, Client, "NICK :%s", Req->argv[0] );
-		}
-		else if( Client_Type( Client ) == CLIENT_SERVER )
-		{
-			/* Nick-Aenderung: allen mitteilen! */
-			Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] );
-			IRC_WriteStrServersPrefix( Client, Client, "NICK :%s", Req->argv[0] );
-		}
-	
-		/* Client-Nick registrieren */
-		Client_SetID( target, Req->argv[0] );
-
-		if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER ))
-		{
-			/* Neuer Client */
-			Log( LOG_DEBUG, "Connection %d: got NICK command ...", Client_Conn( Client ));
-			if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client );
-			else Client_SetType( Client, CLIENT_GOTNICK );
-		}
-		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_GetFromID( 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] );
-			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] );
-			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], 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] );
-			return CONNECTED;
-		}
-
-		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 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_USER ) || ( Client_Type( Client ) == CLIENT_SERVICE ))
-	{
-		/* User / Service */
-		
-		/* 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;
+			Client_Destroy(c, NULL, reason, false);
 	}
-	else 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 )
-		{
-			Log( LOG_ERR, "Got QUIT from %s for unknown client!?", Client_ID( Client ));
-			return CONNECTED;
-		}
-
-		if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL );
-		else Client_Destroy( target, "Got QUIT command.", Req->argv[0] );
-
-		return CONNECTED;
-	}
-	else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-} /* IRC_QUIT */
-
-
-GLOBAL BOOLEAN IRC_SQUIT( CLIENT *Client, REQUEST *Req )
-{
-	CLIENT *target;
-	
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	/* SQUIT ist nur fuer Server erlaubt */
-	if( Client_Type( Client ) != CLIENT_SERVER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+	else
+		Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
 
-	target = Client_GetFromID( Req->argv[0] );
-	if( ! target )
-	{
-		Log( LOG_ERR, "Got SQUIT from %s for unknown server \%s\"!?", Client_ID( Client ), Req->argv[0] );
+	/* Are we still connected or were we killed, too? */
+	if(( my_conn > NONE ) && ( Conn_GetClient( my_conn )))
 		return CONNECTED;
-	}
-
-	if( target == Client ) Log( LOG_DEBUG, "Got SQUIT from %s: %s", Client_ID( Client ), Req->argv[1] );
-	else Log( LOG_DEBUG, "Got SQUIT from %s for %s: %s", Client_ID( Client ), Client_ID( target ), Req->argv[1] );
-
-	/* SQUIT an alle Server weiterleiten */
-	IRC_WriteStrServers( Client, "SQUIT %s :%s", Req->argv[0], Req->argv[1] );
-
-	if( Client_Conn( target ) > NONE )
-	{
-		if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), "Got SQUIT command.", Req->argv[1], TRUE );
-		else Conn_Close( Client_Conn( target ), "Got SQUIT command.", NULL, TRUE );
-		return DISCONNECTED;
-	}
 	else
-	{
-		Client_Destroy( target, "Got SQUIT command.", Req->argv[1] );
-		return CONNECTED;
-	}
-} /* IRC_SQUIT */
-
-
-GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
-{
-	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 > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	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 */
+		return DISCONNECTED;
+} /* IRC_KILL */
 
 
-GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC command NOTICE.
+ */
+GLOBAL bool
+IRC_NOTICE(CLIENT *Client, REQUEST *Req)
 {
-	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 );
-
-	/* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
-	 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
-
-	Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client ));
-	return CONNECTED;
-} /* IRC_PONG */
+	return Send_Message(Client, Req, CLIENT_USER, false);
+} /* IRC_NOTICE */
 
 
-GLOBAL BOOLEAN IRC_MOTD( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC command PRIVMSG.
+ */
+GLOBAL bool
+IRC_PRIVMSG(CLIENT *Client, REQUEST *Req)
 {
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	return Show_MOTD( Client );
-} /* IRC_MOTD */
+	return Send_Message(Client, Req, CLIENT_USER, true);
+} /* IRC_PRIVMSG */
 
 
-GLOBAL BOOLEAN IRC_PRIVMSG( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC command SQUERY.
+ */
+GLOBAL bool
+IRC_SQUERY(CLIENT *Client, REQUEST *Req)
 {
-	CLIENT *to, *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 ));
+	return Send_Message(Client, Req, CLIENT_SERVICE, true);
+} /* IRC_SQUERY */
 
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc == 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
-	if( Req->argc == 1 ) return IRC_WriteStrClient( Client, ERR_NOTEXTTOSEND_MSG, Client_ID( Client ));
-	if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 
-	if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
-	else from = Client;
-	
-	to = Client_Search( Req->argv[0] );
-	if( to )
-	{
-		/* Okay, Ziel ist ein User */
-		if( Client_Conn( from ) >= 0 ) Conn_UpdateIdle( Client_Conn( from ));
-		return IRC_WriteStrClientPrefix( to, from, "PRIVMSG %s :%s", Client_ID( to ), Req->argv[1] );
-	}
-	else return IRC_WriteStrClient( from, ERR_NOSUCHNICK_MSG, Client_ID( from ), Req->argv[0] );
-} /* IRC_PRIVMSG */
-
-
-GLOBAL BOOLEAN IRC_NOTICE( CLIENT *Client, REQUEST *Req )
+GLOBAL bool
+IRC_TRACE( CLIENT *Client, REQUEST *Req )
 {
-	CLIENT *to, *from;
+	CLIENT *from, *target, *c;
+	CONN_ID idx, idx2;
+	char user[CLIENT_USER_LEN];
 
 	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 ));
+	/* Bad number of arguments? */
+	if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
 
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 2 ) return CONNECTED;
-
-	if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
+	/* Search sender */
+	if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
 	else from = Client;
+	if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
 
-	to = Client_Search( Req->argv[0] );
-	if( to )
-	{
-		/* Okay, Ziel ist ein User */
-		return IRC_WriteStrClientPrefix( to, from, "NOTICE %s :%s", Client_ID( to ), Req->argv[1] );
-	}
-	else return CONNECTED;
-} /* IRC_NOTICE */
-
-
-GLOBAL BOOLEAN IRC_MODE( CLIENT *Client, REQUEST *Req )
-{
-	CHAR x[2], new_modes[CLIENT_MODE_LEN], *ptr;
-	BOOLEAN set, ok;
-	CLIENT *target;
+	/* Search target */
+	if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
+	else target = Client_ThisServer( );
 	
-	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 > 2 ) || ( Req->argc < 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	/* "Ziel-Client" suchen */
-	target = Client_Search( Req->argv[0] );
-
-	/* Wer ist der Anfragende? */
-	if( Client_Type( Client ) == CLIENT_USER )
-	{
-		/* User: MODE ist nur fuer sich selber zulaessig */
-		if( target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
-	}
-	else
+	/* Forward command to other server? */
+	if( target != Client_ThisServer( ))
 	{
-		/* Server: gibt es den Client ueberhaupt? */
-		if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] );
-	}
-
-	/* Werden die Modes erfragt? */
-	if( Req->argc == 1 ) return IRC_WriteStrClient( Client, RPL_UMODEIS_MSG, Client_ID( Client ), Client_Modes( Client ));
-
-	ptr = Req->argv[1];
+		if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
 
-	/* Sollen Modes gesetzt oder geloescht werden? */
-	if( *ptr == '+' ) set = TRUE;
-	else if( *ptr == '-' ) set = FALSE;
-	else return IRC_WriteStrClient( Client, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Client ));
+		/* Send RPL_TRACELINK back to initiator */
+		idx = Client_Conn( Client ); assert( idx > NONE );
+		idx2 = Client_Conn( Client_NextHop( target )); assert( idx2 > NONE );
+		if( ! IRC_WriteStrClient( from, RPL_TRACELINK_MSG, Client_ID( from ), PACKAGE_NAME, PACKAGE_VERSION, Client_ID( target ), Client_ID( Client_NextHop( target )), Option_String( idx2 ), time( NULL ) - Conn_StartTime( idx2 ), Conn_SendQ( idx ), Conn_SendQ( idx2 ))) return DISCONNECTED;
 
-	/* Reply-String mit Aenderungen vorbereiten */
-	if( set ) strcpy( new_modes, "+" );
-	else strcpy( new_modes, "-" );
+		/* Forward command */
+		IRC_WriteStrClientPrefix( target, from, "TRACE %s", Req->argv[0] );
+		return CONNECTED;
+	}
 
-	ptr++;
-	ok = TRUE;
-	x[1] = '\0';
-	while( *ptr )
+	/* Infos about all connected servers */
+	c = Client_First( );
+	while( c )
 	{
-		x[0] = '\0';
-		if( Client_Type( Client ) == CLIENT_SERVER )
-		{
-			x[0] = *ptr;
-			ok = TRUE;
-		}
-		else
+		if( Client_Conn( c ) > NONE )
 		{
-			switch( *ptr )
+			/* Local client */
+			if( Client_Type( c ) == CLIENT_SERVER )
 			{
-				case 'i':
-					/* invisible */
-					x[0] = 'i';
-					break;
-				case 'r':
-					/* restricted (kann nur gesetzt werden) */
-					if( set ) x[0] = 'r';
-					else ok = IRC_WriteStrClient( target, ERR_RESTRICTED_MSG, Client_ID( target ));
-					break;
-				case 'o':
-					/* operator (kann nur geloescht werden) */
-					if( ! set )
-					{
-						Client_SetOperByMe( target, FALSE );
-						x[0] = 'o';
-					}
-					else ok = IRC_WriteStrClient( target, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( target ));
-					break;
-				default:
-					ok = IRC_WriteStrClient( target, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( target ));
-					x[0] = '\0';
+				/* Server link */
+				strlcpy( user, Client_User( c ), sizeof( user ));
+				if( user[0] == '~' ) strlcpy( user, "unknown", sizeof( user ));
+				if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), user, Client_Hostname( c ), Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( c )))) return DISCONNECTED;
+			}
+			if(( Client_Type( c ) == CLIENT_USER ) && ( strchr( Client_Modes( c ), 'o' )))
+			{
+				/* IRC Operator */
+				if( ! IRC_WriteStrClient( from, RPL_TRACEOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
 			}
 		}
-		if( ! ok ) break;
-
-		ptr++;
-		if( ! x[0] ) continue;
-
-		/* Okay, gueltigen Mode gefunden */
-		if( set )
-		{
-			/* Mode setzen. Wenn der Client ihn noch nicht hatte: merken */
-			if( Client_ModeAdd( target, x[0] )) strcat( new_modes, x );
-		}
-		else
-		{
-			/* Modes geloescht. Wenn der Client ihn hatte: merken */
-			if( Client_ModeDel( target, x[0] )) strcat( new_modes, x );
-		}
-	}
-	
-	/* Geanderte Modes? */
-	if( new_modes[1] )
-	{
-		if( Client_Type( Client ) == CLIENT_SERVER )
-		{
-			/* Modes an andere Server forwarden */
-			IRC_WriteStrServersPrefix( Client, Client, "MODE %s :%s", Client_ID( target ), new_modes );
-		}
-		else
-		{
-			/* Bestaetigung an Client schicken & andere Server informieren */
-			ok = IRC_WriteStrRelated( Client, "MODE %s :%s", Client_ID( target ), new_modes );
-			IRC_WriteStrServers( Client, "MODE %s :%s", Client_ID( target ), new_modes );
-		}
-		Log( LOG_DEBUG, "User \"%s\": Mode change, now \"%s\".", Client_Mask( target ), Client_Modes( target ));
-	}
-	return ok;
-} /* IRC_MODE */
-
-
-GLOBAL BOOLEAN IRC_OPER( CLIENT *Client, REQUEST *Req )
-{
-	INT i;
-	
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-	
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	/* Operator suchen */
-	for( i = 0; i < Conf_Oper_Count; i++)
-	{
-		if( Conf_Oper[i].name[0] && Conf_Oper[i].pwd[0] && ( strcmp( Conf_Oper[i].name, Req->argv[0] ) == 0 )) break;
-	}
-	if( i >= Conf_Oper_Count )
-	{
-		Log( LOG_WARNING, "Got invalid OPER from \"%s\": Name \"%s\" not configured!", Client_Mask( Client ), Req->argv[0] );
-		return IRC_WriteStrClient( Client, ERR_PASSWDMISMATCH_MSG, Client_ID( Client ));
-	}
-
-	/* Stimmt das Passwort? */
-	if( strcmp( Conf_Oper[i].pwd, Req->argv[1] ) != 0 )
-	{
-		Log( LOG_WARNING, "Got invalid OPER from \"%s\": Bad password for \"%s\"!", Client_Mask( Client ), Conf_Oper[i].name );
-		return IRC_WriteStrClient( Client, ERR_PASSWDMISMATCH_MSG, Client_ID( Client ));
-	}
-	
-	if( ! Client_HasMode( Client, 'o' ))
-	{
-		/* noch kein o-Mode gesetzt */
-		Client_ModeAdd( Client, 'o' );
-		if( ! IRC_WriteStrRelated( Client, "MODE %s :+o", Client_ID( Client ))) return DISCONNECTED;
-		IRC_WriteStrServersPrefix( NULL, Client, "MODE %s :+o", Client_ID( Client ));
+		c = Client_Next( c );
 	}
 
-	if( ! Client_OperByMe( Client )) Log( LOG_NOTICE, "Got valid OPER from \"%s\", user is an IRC operator now.", Client_Mask( Client ));
+	IRC_SetPenalty( Client, 3 );
+	return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
+} /* IRC_TRACE */
 
-	Client_SetOperByMe( Client, TRUE );
-	return IRC_WriteStrClient( Client, RPL_YOUREOPER_MSG, Client_ID( Client ));
-} /* IRC_OPER */
 
-
-GLOBAL BOOLEAN IRC_DIE( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC "HELP" command.
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
+ */
+GLOBAL bool
+IRC_HELP(CLIENT *Client, REQUEST *Req)
 {
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
+	COMMAND *cmd;
 
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+	assert(Client != NULL);
+	assert(Req != NULL);
 
-	if(( ! Client_HasMode( Client, 'o' )) || ( ! Client_OperByMe( Client ))) return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG, Client_ID( Client ));
+	/* Bad number of arguments? */
+	if (Req->argc > 1)
+		return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
+					  Client_ID(Client), Req->command);
 
-	Log( LOG_NOTICE, "Got DIE command from \"%s\", going down!", Client_Mask( Client ));
-	NGIRCd_Quit = TRUE;
-	return CONNECTED;
-} /* IRC_DIE */
+	IRC_SetPenalty(Client, 2);
 
+	if ((Req->argc == 0 && array_bytes(&Conf_Helptext) > 0)
+	    || (Req->argc >= 1 && strcasecmp(Req->argv[0], "Commands") != 0)) {
+		/* Help text available and requested */
+		if (Req->argc >= 1)
+			return Help(Client, Req->argv[0]);
 
-GLOBAL BOOLEAN IRC_RESTART( CLIENT *Client, REQUEST *Req )
-{
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	if(( ! Client_HasMode( Client, 'o' )) || ( ! Client_OperByMe( Client ))) return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG, Client_ID( Client ));
+		if (!Help(Client, "Intro"))
+			return DISCONNECTED;
+		return CONNECTED;
+	}
 
-	Log( LOG_NOTICE, "Got RESTART command from \"%s\", going down!", Client_Mask( Client ));
-	NGIRCd_Restart = TRUE;
+	cmd = Parse_GetCommandStruct();
+	while(cmd->name) {
+		if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
+					Client_ID(Client), cmd->name))
+			return DISCONNECTED;
+		cmd++;
+	}
 	return CONNECTED;
-} /* IRC_RESTART */
+} /* IRC_HELP */
 
 
-GLOBAL BOOLEAN IRC_NAMES( CLIENT *Client, REQUEST *Req )
+/**
+ * Send help for a given topic to the client.
+ *
+ * @param Client The client requesting help.
+ * @param Topoc The help topic requested.
+ * @return CONNECTED or DISCONNECTED.
+ */
+static bool
+Help(CLIENT *Client, const char *Topic)
 {
-	CHAR rpl[COMMAND_LEN];
-	CLIENT *c;
-	
-	assert( Client != NULL );
-	assert( Req != NULL );
+	char *line;
+	size_t helptext_len, len_str, idx_start, lines = 0;
+	bool in_article = false;
+
+	assert(Client != NULL);
+	assert(Topic != NULL);
+
+	helptext_len = array_bytes(&Conf_Helptext);
+	line = array_start(&Conf_Helptext);
+	while (helptext_len > 0) {
+		len_str = strlen(line) + 1;
+		assert(helptext_len >= len_str);
+		helptext_len -= len_str;
+
+		if (in_article) {
+			/* The first character in each article text line must
+			 * be a TAB (ASCII 9) character which will be stripped
+			 * in the output. If it is not a TAB, the end of the
+			 * article has been reached. */
+			if (line[0] != '\t') {
+				if (lines > 0)
+					return CONNECTED;
+				else
+					break;
+			}
 
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
+			/* A single '.' character indicates an empty line */
+			if (line[1] == '.' && line[2] == '\0')
+				idx_start = 2;
+			else
+				idx_start = 1;
 
-	/* Falsche Anzahl Parameter? */
-	if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+			if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
+						Client_ID(Client),
+						&line[idx_start]))
+				return DISCONNECTED;
+			lines++;
 
-	/* Noch alle User ausgeben, die in keinem Channel sind */
-	rpl[0] = '\0';
-	c = Client_First( );
-	while( c )
-	{
-		if( Client_Type( c ) == CLIENT_USER )
-		{
-			/* Okay, das ist ein User */
-			strcat( rpl, Client_ID( c ));
-			strcat( rpl, " " );
+		} else {
+			if (line[0] == '-' && line[1] == ' '
+			    && strcasecmp(&line[2], Topic) == 0)
+				in_article = true;
 		}
 
-		/* Antwort zu lang? Splitten. */
-		if( strlen( rpl ) > 480 )
-		{
-			if( rpl[strlen( rpl ) - 1] == ' ' ) rpl[strlen( rpl ) - 1] = '\0';
-			if( ! IRC_WriteStrClient( Client, RPL_NAMREPLY_MSG, Client_ID( Client ), "*", "*", rpl )) return DISCONNECTED;
-			rpl[0] = '\0';
-		}
-		
-		c = Client_Next( c );
-	}
-	if( rpl[0] )
-	{
-		/* es wurden User gefunden */
-		if( rpl[strlen( rpl ) - 1] == ' ' ) rpl[strlen( rpl ) - 1] = '\0';
-		if( ! IRC_WriteStrClient( Client, RPL_NAMREPLY_MSG, Client_ID( Client ), "*", "*", rpl )) return DISCONNECTED;
+		line += len_str;
 	}
-	return IRC_WriteStrClient( Client, RPL_ENDOFNAMES_MSG, Client_ID( Client ), "*" );
-} /* IRC_NAMES */
-
-
-GLOBAL BOOLEAN IRC_ISON( CLIENT *Client, REQUEST *Req )
-{
-	CHAR rpl[COMMAND_LEN];
-	CLIENT *c;
-	CHAR *ptr;
-	INT i;
-	
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-
-	/* Falsche Anzahl Parameter? */
-	if(( Req->argc < 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 
-	strcpy( rpl, RPL_ISON_MSG );
-	for( i = 0; i < Req->argc; i++ )
-	{
-		ptr = strtok( Req->argv[i], " " );
-		while( ptr )
-		{
-			ngt_TrimStr( ptr );
-			c = Client_GetFromID( ptr );
-			if( c && ( Client_Type( c ) == CLIENT_USER ))
-			{
-				/* Dieser Nick ist "online" */
-				strcat( rpl, ptr );
-				strcat( rpl, " " );
-			}
-			ptr = strtok( NULL, " " );
-		}
-	}
-	if( rpl[strlen( rpl ) - 1] == ' ' ) rpl[strlen( rpl ) - 1] = '\0';
+	/* Help topic not found (or empty)! */
+	if (!IRC_WriteStrClient(Client, "NOTICE %s :No help for \"%s\" found!",
+				Client_ID(Client), Topic))
+		return DISCONNECTED;
 
-	return IRC_WriteStrClient( Client, rpl, Client_ID( Client ) );
-} /* IRC_ISON */
+	return CONNECTED;
+}
 
 
-GLOBAL BOOLEAN IRC_WHOIS( CLIENT *Client, REQUEST *Req )
+static char *
+#ifdef ZLIB
+Option_String(CONN_ID Idx)
+#else
+Option_String(UNUSED CONN_ID Idx)
+#endif
 {
-	CLIENT *from, *target, *c;
-	CHAR *ptr = NULL;
-	
-	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 ) || ( Req->argc > 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+	static char option_txt[8];
+#ifdef ZLIB
+	UINT16 options;
 
-	/* Client suchen */
-	c = Client_GetFromID( Req->argv[Req->argc - 1] );
-	if(( ! c ) || ( Client_Type( c ) != CLIENT_USER )) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[Req->argc - 1] );
-
-	/* Empfaenger des WHOIS suchen */
-	if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_GetFromID( Req->prefix );
-	else from = Client;
-	if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
-	
-	/* Forwarden an anderen Server? */
-	if( Req->argc > 1 )
-	{
-		/* angegebenen Ziel-Server suchen */
-		target = Client_GetFromID( Req->argv[1] );
-		if( ! target ) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[1] );
-		ptr = Req->argv[1];
-	}
-#ifndef STRICT_RFC
-	else if( Client_Conn( c ) == NONE )
-	{
-		/* Client ist nicht von uns. Ziel-Server suchen */
-		target = c;
-		ptr = Req->argv[0];
-	}
+	options = Conn_Options(Idx);
 #endif
-	else target = NULL;
-	
-	if( target && ( Client_NextHop( target ) != Client_ThisServer( ))) return IRC_WriteStrClientPrefix( target, from, "WHOIS %s :%s", Req->argv[0], ptr );
-	
-	/* Nick, User und Name */
-	if( ! IRC_WriteStrClient( from, RPL_WHOISUSER_MSG, Client_ID( from ), Client_ID( c ), Client_User( c ), Client_Hostname( c ), Client_Info( c ))) return DISCONNECTED;
-
-	/* Server */
-	if( ! IRC_WriteStrClient( from, RPL_WHOISSERVER_MSG, Client_ID( from ), Client_ID( c ), Client_ID( Client_Introducer( c )), Client_Info( Client_Introducer( c )))) return DISCONNECTED;
 
-	/* IRC-Operator? */
-	if( Client_HasMode( c, 'o' ))
-	{
-		if( ! IRC_WriteStrClient( from, RPL_WHOISOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
-	}
-
-	/* Idle (nur lokale Clients) */
-	if( Client_Conn( c ) > NONE )
-	{
-		if( ! IRC_WriteStrClient( from, RPL_WHOISIDLE_MSG, Client_ID( from ), Client_ID( c ), Conn_GetIdle( Client_Conn ( c )))) return DISCONNECTED;
-	}
+	strcpy(option_txt, "F");	/* No idea what this means, but the
+					 * original ircd sends it ... */
+#ifdef ZLIB
+	if(options & CONN_ZIP)		/* zlib compression supported. */
+		strcat(option_txt, "z");
+#endif
 
-	/* End of Whois */
-	return IRC_WriteStrClient( from, RPL_ENDOFWHOIS_MSG, Client_ID( from ), Client_ID( c ));
-} /* IRC_WHOIS */
+	return option_txt;
+} /* Option_String */
 
 
-GLOBAL BOOLEAN IRC_USERHOST( CLIENT *Client, REQUEST *Req )
+static bool
+Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
 {
-	CHAR rpl[COMMAND_LEN];
-	CLIENT *c;
-	INT max, i;
-
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Client_Type( Client ) != CLIENT_USER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
-
-	/* Falsche Anzahl Parameter? */
-	if(( Req->argc < 1 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	if( Req->argc > 5 ) max = 5;
-	else max = Req->argc;
-	
-	strcpy( rpl, RPL_USERHOST_MSG );
-	for( i = 0; i < max; i++ )
-	{
-		c = Client_GetFromID( Req->argv[i] );
-		if( c && ( Client_Type( c ) == CLIENT_USER ))
-		{
-			/* Dieser Nick ist "online" */
-			strcat( rpl, Client_ID( c ));
-			if( Client_HasMode( c, 'o' )) strcat( rpl, "*" );
-			strcat( rpl, "=" );
-			if( Client_HasMode( c, 'a' )) strcat( rpl, "-" );
-			else strcat( rpl, "+" );
-			strcat( rpl, Client_User( c ));
-			strcat( rpl, "@" );
-			strcat( rpl, Client_Hostname( c ));
-			strcat( rpl, " " );
-		}
+	CLIENT *cl, *from;
+	CL2CHAN *cl2chan;
+	CHANNEL *chan;
+	char *currentTarget = Req->argv[0];
+	char *lastCurrentTarget = NULL;
+	char *message = NULL;
+
+	assert(Client != NULL);
+	assert(Req != NULL);
+
+	if (Req->argc == 0) {
+		if (!SendErrors)
+			return CONNECTED;
+		return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
+					  Client_ID(Client), Req->command);
+	}
+	if (Req->argc == 1) {
+		if (!SendErrors)
+			return CONNECTED;
+		return IRC_WriteStrClient(Client, ERR_NOTEXTTOSEND_MSG,
+					  Client_ID(Client));
+	}
+	if (Req->argc > 2) {
+		if (!SendErrors)
+			return CONNECTED;
+		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
+					  Client_ID(Client), Req->command);
 	}
-	if( rpl[strlen( rpl ) - 1] == ' ' ) rpl[strlen( rpl ) - 1] = '\0';
-
-	return IRC_WriteStrClient( Client, rpl, Client_ID( Client ) );
-} /* IRC_USERHOST */
 
+	if (Client_Type(Client) == CLIENT_SERVER)
+		from = Client_Search(Req->prefix);
+	else
+		from = Client;
+	if (!from)
+		return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
+					  Client_ID(Client), Req->prefix);
+
+#ifdef ICONV
+	if (Client_Conn(Client) > NONE)
+		message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
+	else
+#endif
+		message = Req->argv[1];
+
+	/* handle msgtarget = msgto *("," msgto) */
+	currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
+	ngt_UpperStr(Req->command);
+
+	while (currentTarget) {
+		/* Check for and handle valid <msgto> of form:
+		 * RFC 2812 2.3.1:
+		 *   msgto =  channel / ( user [ "%" host ] "@" servername )
+		 *   msgto =/ ( user "%" host ) / targetmask
+		 *   msgto =/ nickname / ( nickname "!" user "@" host )
+		 */
+		if (strchr(currentTarget, '!') == NULL)
+			/* nickname */
+			cl = Client_Search(currentTarget);
+		else
+			cl = NULL;
+
+		if (cl == NULL) {
+			/* If currentTarget isn't a nickname check for:
+			 * user ["%" host] "@" servername
+			 * user "%" host
+			 * nickname "!" user "@" host
+			 */
+			char target[COMMAND_LEN];
+			char * nick = NULL;
+			char * user = NULL;
+			char * host = NULL;
+			char * server = NULL;
+
+			strlcpy(target, currentTarget, COMMAND_LEN);
+			server = strchr(target, '@');
+			if (server) {
+				*server = '\0';
+				server++;
+			}
+			host = strchr(target, '%');
+			if (host) {
+				*host = '\0';
+				host++;
+			}
+			user = strchr(target, '!');
+			if (user) {
+				/* msgto form: nick!user@host */
+				*user = '\0';
+				user++;
+				nick = target;
+				host = server; /* not "@server" but "@host" */
+			} else {
+				user = target;
+			}
 
-GLOBAL BOOLEAN IRC_ERROR( CLIENT *Client, REQUEST *Req )
-{
-	assert( Client != NULL );
-	assert( Req != NULL );
+			for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+				if (Client_Type(cl) != CLIENT_USER &&
+				    Client_Type(cl) != CLIENT_SERVICE)
+					continue;
+				if (nick != NULL && host != NULL) {
+					if (strcasecmp(nick, Client_ID(cl)) == 0 &&
+					    strcasecmp(user, Client_User(cl)) == 0 &&
+					    strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
+						break;
+					else
+						continue;
+				}
+				if (strcasecmp(user, Client_User(cl)) != 0)
+					continue;
+				if (host != NULL && strcasecmp(host,
+						Client_HostnameDisplayed(cl)) != 0)
+					continue;
+				if (server != NULL && strcasecmp(server,
+						Client_ID(Client_Introducer(cl))) != 0)
+					continue;
+				break;
+			}
+		}
 
-	if( Req->argc < 1 ) Log( LOG_NOTICE, "Got ERROR from \"%s\"!", Client_Mask( Client ));
-	else Log( LOG_NOTICE, "Got ERROR from \"%s\": %s!", Client_Mask( Client ), Req->argv[0] );
+		if (cl) {
+			/* Target is a user, enforce type */
+#ifndef STRICT_RFC
+			if (Client_Type(cl) != ForceType &&
+			    !(ForceType == CLIENT_USER &&
+			      (Client_Type(cl) == CLIENT_USER ||
+			       Client_Type(cl) == CLIENT_SERVICE))) {
+#else
+			if (Client_Type(cl) != ForceType) {
+#endif
+				if (SendErrors && !IRC_WriteStrClient(
+				    from, ERR_NOSUCHNICK_MSG,Client_ID(from),
+				    currentTarget))
+					return DISCONNECTED;
+				goto send_next_target;
+			}
 
-	return CONNECTED;
-} /* IRC_ERROR */
+#ifndef STRICT_RFC
+			if (ForceType == CLIENT_SERVICE &&
+			    (Conn_Options(Client_Conn(Client_NextHop(cl)))
+			     & CONN_RFC1459)) {
+				/* SQUERY command but RFC 1459 link: convert
+				 * request to PRIVMSG command */
+				Req->command = "PRIVMSG";
+			}
+#endif
+			if (Client_HasMode(cl, 'b') &&
+			    !Client_HasMode(from, 'R') &&
+			    !Client_HasMode(from, 'o') &&
+			    !(Client_Type(from) == CLIENT_SERVER) &&
+			    !(Client_Type(from) == CLIENT_SERVICE)) {
+				if (SendErrors && !IRC_WriteStrClient(from,
+						ERR_NONONREG_MSG,
+						Client_ID(from), Client_ID(cl)))
+					return DISCONNECTED;
+				goto send_next_target;
+			}
 
+			if (Client_HasMode(cl, 'C')) {
+				cl2chan = Channel_FirstChannelOf(cl);
+				while (cl2chan) {
+					chan = Channel_GetChannel(cl2chan);
+					if (Channel_IsMemberOf(chan, from))
+						break;
+					cl2chan = Channel_NextChannelOf(cl, cl2chan);
+				}
+				if (!cl2chan) {
+					if (SendErrors && !IRC_WriteStrClient(
+					    from, ERR_NOTONSAMECHANNEL_MSG,
+					    Client_ID(from), Client_ID(cl)))
+						return DISCONNECTED;
+					goto send_next_target;
+				}
+			}
 
-LOCAL BOOLEAN Hello_User( CLIENT *Client )
-{
-	assert( Client != NULL );
+			if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
+			    && strchr(Client_Modes(cl), 'a')) {
+				/* Target is away */
+				if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
+							Client_ID(from),
+							Client_ID(cl),
+							Client_Away(cl)))
+					return DISCONNECTED;
+			}
+			if (Client_Conn(from) > NONE) {
+				Conn_UpdateIdle(Client_Conn(from));
+			}
+			if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
+						      Req->command, Client_ID(cl),
+						      message))
+				return DISCONNECTED;
+		} else if (ForceType != CLIENT_SERVICE
+			   && (chan = Channel_Search(currentTarget))) {
+			if (!Channel_Write(chan, from, Client, Req->command,
+					   SendErrors, message))
+					return DISCONNECTED;
+		} else if (ForceType != CLIENT_SERVICE
+			/* $#: server/target mask, RFC 2812, sec. 3.3.1 */
+			   && strchr("$#", currentTarget[0])
+			   && strchr(currentTarget, '.')) {
+			/* targetmask */
+			if (!Send_Message_Mask(from, Req->command, currentTarget,
+					       message, SendErrors))
+				return DISCONNECTED;
+		} else {
+			if (!SendErrors)
+				return CONNECTED;
+			if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
+						Client_ID(from), currentTarget))
+				return DISCONNECTED;
+		}
 
-	/* 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;
+	send_next_target:
+		currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
+		if (currentTarget)
+			Conn_SetPenalty(Client_Conn(Client), 1);
 	}
 
-	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 );
-
-	return Show_MOTD( Client );
-} /* Hello_User */
+	return CONNECTED;
+} /* Send_Message */
 
 
-LOCAL BOOLEAN Show_MOTD( CLIENT *Client )
+static bool
+Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
+		  char * message, bool SendErrors)
 {
-	BOOLEAN ok;
-	CHAR line[127];
-	FILE *fd;
-	
-	assert( Client != NULL );
-
-	fd = fopen( Conf_MotdFile, "r" );
-	if( ! fd )
-	{
-		Log( LOG_WARNING, "Can't read MOTD file \"%s\": %s", Conf_MotdFile, strerror( errno ));
-		return IRC_WriteStrClient( Client, ERR_NOMOTD_MSG, Client_ID( Client ) );
-	}
-	
-	IRC_WriteStrClient( Client, RPL_MOTDSTART_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )));
-	while( TRUE )
-	{
-		if( ! fgets( line, 126, fd )) break;
-		if( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
-		if( ! IRC_WriteStrClient( Client, RPL_MOTD_MSG, Client_ID( Client ), line ))
-		{
-			fclose( fd );
-			return FALSE;
+	CLIENT *cl;
+	bool client_match;
+	char *mask = targetMask + 1;
+	const char *check_wildcards;
+
+	cl = NULL;
+
+	if (strchr(Client_Modes(from), 'o') == NULL) {
+		if (!SendErrors)
+			return true;
+		return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
+					  Client_ID(from));
+	}
+
+	/*
+	 * RFC 2812, sec. 3.3.1 requires that targetMask have at least one
+	 * dot (".") and no wildcards ("*", "?") following the last one.
+	 */
+	check_wildcards = strrchr(targetMask, '.');
+	assert(check_wildcards != NULL);
+	if (check_wildcards &&
+		check_wildcards[strcspn(check_wildcards, "*?")])
+	{
+		if (!SendErrors)
+			return true;
+		return IRC_WriteStrClient(from, ERR_WILDTOPLEVEL, targetMask);
+	}
+
+	/* #: hostmask, see RFC 2812, sec. 3.3.1 */
+	if (targetMask[0] == '#') {
+		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+			if (Client_Type(cl) != CLIENT_USER)
+				continue;
+			client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
+			if (client_match)
+				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
+						command, Client_ID(cl), message))
+					return false;
+		}
+	} else {
+		assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
+		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+			if (Client_Type(cl) != CLIENT_USER)
+				continue;
+			client_match = MatchCaseInsensitive(mask,
+					Client_ID(Client_Introducer(cl)));
+			if (client_match)
+				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
+						command, Client_ID(cl), message))
+					return false;
 		}
 	}
-	ok = IRC_WriteStrClient( Client, RPL_ENDOFMOTD_MSG, Client_ID( Client ) );
-
-	fclose( fd );
-	
-	return ok;
-} /* Show_MOTD */
-
-
-LOCAL VOID Kill_Nick( CHAR *Nick )
-{
-	Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected!", Nick );
-	/* FIXME */
-	Log( LOG_ALERT, "[Kill_Nick() not implemented - OOOPS!]" );
-} /* Kill_Nick */
+	return CONNECTED;
+} /* Send_Message_Mask */
 
 
 /* -eof- */