/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2004 Alexander Barton <alex@barton.de>
*
- * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
- * der GNU General Public License (GPL), wie von der Free Software Foundation
- * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
- * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
- * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
- * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
+ * 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.
*
- * $Id: irc.c,v 1.105 2002/12/06 17:02:39 alex Exp $
- *
- * irc.c: IRC-Befehle
+ * IRC commands
*/
#include "portab.h"
+static char UNUSED id[] = "$Id: irc.c,v 1.132 2008/01/15 22:28:14 fw Exp $";
+
#include "imp.h"
#include <assert.h>
+#include <stdio.h>
#include <string.h>
-#include "conn.h"
+#include "ngircd.h"
+#include "resolve.h"
+#include "conn-func.h"
+#include "conf.h"
#include "client.h"
#include "channel.h"
#include "defines.h"
#include "irc.h"
-GLOBAL BOOLEAN
+static char *Option_String PARAMS((CONN_ID Idx));
+static bool Send_Message PARAMS((CLIENT *Client, REQUEST *Req, int ForceType));
+
+
+GLOBAL bool
IRC_ERROR( CLIENT *Client, REQUEST *Req )
{
assert( Client != NULL );
} /* IRC_ERROR */
-GLOBAL BOOLEAN
+/**
+ * Kill client on request.
+ * 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.
+ * Please note that this function is also called internally, without a real
+ * KILL command beeing received over the network! Client is Client_ThisServer()
+ * in this case. */
+GLOBAL bool
IRC_KILL( CLIENT *Client, REQUEST *Req )
{
CLIENT *prefix, *c;
- CHAR reason[COMMAND_LEN];
+ char reason[COMMAND_LEN], *msg;
+ CONN_ID my_conn, conn;
assert( Client != NULL );
assert( Req != NULL );
- /* is the user an IRC operator? */
- if(( Client_Type( Client ) != CLIENT_SERVER ) && ( ! Client_OperByMe( Client ))) return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG, Client_ID( Client ));
+ if(( Client_Type( Client ) != CLIENT_SERVER ) &&
+ ( ! Client_OperByMe( Client )))
+ {
+ /* The originator of the KILL is neither an IRC operator of
+ * this server nor a server. */
+ return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG,
+ Client_ID( Client ));
+ }
- /* Falsche Anzahl Parameter? */
- if(( Req->argc != 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+ if( Req->argc != 2 )
+ {
+ /* This command requires exactly 2 parameters! */
+ return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
+ Client_ID( Client ), Req->command );
+ }
if( Req->prefix ) prefix = Client_Search( Req->prefix );
else prefix = Client;
if( ! prefix )
{
- Log( LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!", Req->prefix );
+ Log( LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
+ Req->prefix );
prefix = Client_ThisServer( );
}
- Log( LOG_NOTICE|LOG_snotice, "Got KILL command from \"%s\" for \"%s\": %s", Client_Mask( prefix ), Req->argv[0], Req->argv[1] );
+ if( Client != Client_ThisServer( ))
+ {
+ /* This is a "real" KILL received from the network. */
+ 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 */
+ if( Client_Type( Client ) == CLIENT_USER )
+ {
+ /* Prefix the "reason" if the originator is a regular user,
+ * so users can't spoof KILLs of servers. */
+ snprintf( reason, sizeof( reason ), "KILLed by %s: %s",
+ Client_ID( Client ), Req->argv[1] );
+ }
+ else
+ strlcpy( reason, Req->argv[1], sizeof( reason ));
- /* build reason string */
- if( Client_Type( Client ) == CLIENT_USER ) sprintf( reason, "KILLed by %s: %s", Client_ID( Client ), Req->argv[1] );
- else strcpy( reason, Req->argv[1] );
+ /* Inform other servers */
+ IRC_WriteStrServersPrefix( Client, prefix, "KILL %s :%s",
+ Req->argv[0], reason );
- /* andere Server benachrichtigen */
- IRC_WriteStrServersPrefix( Client, prefix, "KILL %s :%s", Req->argv[0], reason );
+ /* Save ID of this connection */
+ my_conn = Client_Conn( Client );
- /* haben wir selber einen solchen Client? */
+ /* Do we host such a client? */
c = Client_Search( Req->argv[0] );
if( c )
{
- /* Ja, wir haben einen solchen Client */
- if( Client_Conn( c ) != NONE ) Conn_Close( Client_Conn( c ), NULL, reason, TRUE );
- else Client_Destroy( c, NULL, reason, TRUE );
- }
- else Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
+ if(( Client_Type( c ) != CLIENT_USER ) &&
+ ( Client_Type( c ) != CLIENT_GOTNICK ))
+ {
+ /* 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. */
+
+ if( Client != Client_ThisServer( ))
+ {
+ /* 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 ));
+ }
+
+ Log( LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!",
+ Client_Type( c ), Req->argv[0] );
+ }
- return CONNECTED;
+ /* Kill client NOW! */
+ conn = Client_Conn( c );
+ Client_Destroy( c, NULL, reason, false );
+ if( conn > NONE )
+ Conn_Close( conn, NULL, reason, true );
+ }
+ else
+ Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
+
+ /* Are we still connected or were we killed, too? */
+ if(( my_conn > NONE ) && ( Conn_GetClient( my_conn )))
+ return CONNECTED;
+ else
+ return DISCONNECTED;
} /* IRC_KILL */
-GLOBAL BOOLEAN
+GLOBAL bool
IRC_NOTICE( CLIENT *Client, REQUEST *Req )
{
CLIENT *to, *from;
+ CHANNEL *chan;
assert( Client != NULL );
assert( Req != NULL );
/* Okay, Ziel ist ein User */
return IRC_WriteStrClientPrefix( to, from, "NOTICE %s :%s", Client_ID( to ), Req->argv[1] );
}
- else return CONNECTED;
+ else
+ {
+ chan = Channel_Search(Req->argv[0]);
+ if (chan)
+ return Channel_Notice(chan, from, Client, Req->argv[1]);
+ }
+
+ return CONNECTED;
} /* IRC_NOTICE */
-GLOBAL BOOLEAN
-IRC_PRIVMSG( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC command PRIVMSG.
+ */
+GLOBAL bool
+IRC_PRIVMSG(CLIENT *Client, REQUEST *Req)
{
- CLIENT *cl, *from;
- CHANNEL *chan;
-
+ return Send_Message(Client, Req, CLIENT_USER);
+} /* IRC_PRIVMSG */
+
+
+/**
+ * Handler for the IRC command SQUERY.
+ */
+GLOBAL bool
+IRC_SQUERY(CLIENT *Client, REQUEST *Req)
+{
+ return Send_Message(Client, Req, CLIENT_SERVICE);
+} /* IRC_SQUERY */
+
+
+GLOBAL bool
+IRC_TRACE( CLIENT *Client, REQUEST *Req )
+{
+ CLIENT *from, *target, *c;
+ CONN_ID idx, idx2;
+ char user[CLIENT_USER_LEN];
+
assert( Client != NULL );
assert( Req != NULL );
- /* 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 );
+ /* Bad number of arguments? */
+ if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
+ /* 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 );
- cl = Client_Search( Req->argv[0] );
- if( cl )
+ /* Search target */
+ if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
+ else target = Client_ThisServer( );
+
+ /* Forward command to other server? */
+ if( target != Client_ThisServer( ))
{
- /* Okay, Ziel ist ein Client. Aber ist es auch ein User? */
- if( Client_Type( cl ) != CLIENT_USER ) return IRC_WriteStrClient( from, ERR_NOSUCHNICK_MSG, Client_ID( from ), Req->argv[0] );
+ if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
- /* Okay, Ziel ist ein User */
- if(( Client_Type( Client ) != CLIENT_SERVER ) && ( strchr( Client_Modes( cl ), 'a' )))
+ /* 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;
+
+ /* Forward command */
+ IRC_WriteStrClientPrefix( target, from, "TRACE %s", Req->argv[0] );
+ return CONNECTED;
+ }
+
+ /* Infos about all connected servers */
+ c = Client_First( );
+ while( c )
+ {
+ if( Client_Conn( c ) > NONE )
{
- /* Ziel-User ist AWAY: Meldung verschicken */
- if( ! IRC_WriteStrClient( from, RPL_AWAY_MSG, Client_ID( from ), Client_ID( cl ), Client_Away( cl ))) return DISCONNECTED;
+ /* Local client */
+ if( Client_Type( c ) == CLIENT_SERVER )
+ {
+ /* 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;
+ }
+ }
+ c = Client_Next( c );
+ }
+
+ IRC_SetPenalty( Client, 3 );
+ return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
+} /* IRC_TRACE */
+
+
+GLOBAL bool
+IRC_HELP( CLIENT *Client, REQUEST *Req )
+{
+ COMMAND *cmd;
+
+ assert( Client != NULL );
+ assert( Req != NULL );
+
+ /* Bad number of arguments? */
+ if( Req->argc > 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
+
+ cmd = Parse_GetCommandStruct( );
+ while( cmd->name )
+ {
+ if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
+ cmd++;
+ }
+
+ IRC_SetPenalty( Client, 2 );
+ return CONNECTED;
+} /* IRC_HELP */
+
+
+static char *
+Option_String( CONN_ID Idx )
+{
+ static char option_txt[8];
+ UINT16 options;
+
+ options = Conn_Options(Idx);
+
+ 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
+
+ return option_txt;
+} /* Option_String */
+
+
+static bool
+Send_Message(CLIENT * Client, REQUEST * Req, int ForceType)
+{
+ CLIENT *cl, *from;
+ CHANNEL *chan;
+
+ assert(Client != NULL);
+ assert(Req != NULL);
+
+ 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_Search(Req->prefix);
+ else
+ from = Client;
+ if (!from)
+ return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
+ Client_ID(Client), Req->prefix);
+
+ cl = Client_Search(Req->argv[0]);
+ if (cl) {
+ /* Target is a user, enforce type */
+ if (Client_Type(cl) != ForceType)
+ return IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
+ Client_ID(from),
+ Req->argv[0]);
+
+ if ((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;
}
- /* Text senden */
- if( Client_Conn( from ) > NONE ) Conn_UpdateIdle( Client_Conn( from ));
- return IRC_WriteStrClientPrefix( cl, from, "PRIVMSG %s :%s", Client_ID( cl ), Req->argv[1] );
+ if (Client_Conn(from) > NONE)
+ Conn_UpdateIdle(Client_Conn(from));
+ return IRC_WriteStrClientPrefix(cl, from, "PRIVMSG %s :%s",
+ Client_ID(cl), Req->argv[1]);
}
- chan = Channel_Search( Req->argv[0] );
- if( chan ) return Channel_Write( chan, from, Client, Req->argv[1] );
+ chan = Channel_Search(Req->argv[0]);
+ if (chan)
+ return Channel_Write(chan, from, Client, Req->argv[1]);
- return IRC_WriteStrClient( from, ERR_NOSUCHNICK_MSG, Client_ID( from ), Req->argv[0] );
-} /* IRC_PRIVMSG */
+ return IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
+ Client_ID(from), Req->argv[0]);
+} /* Send_Message */
/* -eof- */
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