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

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/*
* ngIRCd -- The Next Generation IRC Daemon
* Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
*
* 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.
*
* IRC commands for server links
*/
#include "portab.h"
static char UNUSED id[] = "$Id: irc-server.c,v 1.34 2003/12/26 15:55:07 alex Exp $";
#include "imp.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "resolve.h"
#include "conn.h"
#include "conn-zip.h"
#include "conf.h"
#include "client.h"
#include "channel.h"
#include "irc-write.h"
#include "log.h"
#include "messages.h"
#include "parse.h"
#include "ngircd.h"
#include "exp.h"
#include "irc-server.h"
GLOBAL BOOLEAN
IRC_SERVER( CLIENT *Client, REQUEST *Req )
{
CHAR str[LINE_LEN], *ptr, *modes, *topic;
CLIENT *from, *c, *cl;
CL2CHAN *cl2chan;
INT max_hops, i;
CHANNEL *chan;
BOOLEAN ok;
CONN_ID con;
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_GOTPASSSERVER )
{
/* Verbindung soll als Server-Server-Verbindung registriert werden */
Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
/* Falsche Anzahl Parameter? */
if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* Ist dieser Server bei uns konfiguriert? */
for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
if( i >= MAX_SERVERS )
{
/* 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_in ) != 0 )
{
/* Falsches Passwort */
Log( LOG_ERR, "Connection %d: Got bad password from 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 (d.h., bauen nicht wir
* selber die Verbindung zu einem anderen Server auf)? */
con = Client_Conn( Client );
if( Client_Token( Client ) != TOKEN_OUTBOUND )
{
/* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
ok = TRUE;
if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = FALSE;
else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
if( ! ok )
{
Conn_Close( con, "Unexpected server behavior!", NULL, FALSE );
return DISCONNECTED;
}
Client_SetIntroducer( Client, Client );
Client_SetToken( Client, 1 );
}
else
{
/* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
* an die Gegenseite uerbermittelt */
Client_SetToken( Client, atoi( Req->argv[1] ));
}
Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), con );
Client_SetType( Client, CLIENT_SERVER );
Conf_SetServer( i, con );
#ifdef ZLIB
/* Kompression initialisieren, wenn erforderlich */
if( strchr( Client_Flags( Client ), 'Z' ))
{
if( ! Zip_InitConn( con ))
{
/* Fehler! */
Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, FALSE );
return DISCONNECTED;
}
}
#endif
/* maximalen Hop Count ermitteln */
max_hops = 0;
c = Client_First( );
while( c )
{
if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
c = Client_Next( c );
}
/* Alle bisherigen Server dem neuen Server bekannt machen,
* die bisherigen Server ueber den neuen informierenn */
for( i = 0; i < ( max_hops + 1 ); i++ )
{
c = Client_First( );
while( c )
{
if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
{
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_Hops( c ) == 1 ? Client_ThisServer( ) : 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 );
}
}
/* alle User dem neuen Server bekannt machen */
c = Client_First( );
while( c )
{
if( Client_Type( c ) == CLIENT_USER )
{
/* 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;
}
c = Client_Next( c );
}
/* Channels dem neuen Server bekannt machen */
chan = Channel_First( );
while( chan )
{
#ifdef IRCPLUS
/* Send CHANINFO if the peer supports it */
if( strchr( Client_Flags( Client ), 'C' ))
{
modes = Channel_Modes( chan );
topic = Channel_Topic( chan );
if( *modes || *topic )
{
/* send CHANINFO */
if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )) && ( ! *topic ))
{
/* "CHANINFO <chan> +<modes>" */
if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s", Channel_Name( chan ), modes )) return DISCONNECTED;
}
else if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )))
{
/* "CHANINFO <chan> +<modes> :<topic>" */
if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s :%s", Channel_Name( chan ), modes, topic )) return DISCONNECTED;
}
else
{
/* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s %s %ld :%s", Channel_Name( chan ), modes, strchr( Channel_Modes( chan ), 'k' ) ? Channel_Key( chan ) : "*", strchr( Channel_Modes( chan ), 'l' ) ? Channel_MaxUsers( chan ) : 0L, topic )) return DISCONNECTED;
}
}
}
#endif
/* alle Member suchen */
cl2chan = Channel_FirstMember( chan );
snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
while( cl2chan )
{
cl = Channel_GetClient( cl2chan );
assert( cl != NULL );
/* Nick, ggf. mit Modes, anhaengen */
if( str[strlen( str ) - 1] != ':' ) strlcat( str, ",", sizeof( str ));
if( strchr( Channel_UserModes( chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
if( strchr( Channel_UserModes( chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
strlcat( str, Client_ID( cl ), sizeof( str ));
if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
{
/* Zeile senden */
if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
}
cl2chan = Channel_NextMember( chan, cl2chan );
}
/* noch Daten da? */
if( str[strlen( str ) - 1] != ':')
{
/* Ja; Also senden ... */
if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
}
/* naechsten Channel suchen */
chan = Channel_Next( chan );
}
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];
from = Client_Search( Req->prefix );
if( ! from )
{
/* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", TRUE );
return DISCONNECTED;
}
/* Neue Client-Struktur anlegen */
c = Client_NewRemoteServer( Client, Req->argv[0], from, 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-Meldung zusammenbauen und ausgeben */
if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
else strcpy( str, "" );
Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
/* Andere Server informieren */
IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
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 )
{
CHAR nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
BOOLEAN is_op, is_voiced;
CHANNEL *chan;
CLIENT *c;
assert( Client != NULL );
assert( Req != NULL );
/* Falsche Anzahl Parameter? */
if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
strcpy( nick_out, "" );
channame = Req->argv[0];
ptr = strtok( nick_in, "," );
while( ptr )
{
is_op = is_voiced = FALSE;
/* Prefixe abschneiden */
while(( *ptr == '@' ) || ( *ptr == '+' ))
{
if( *ptr == '@' ) is_op = TRUE;
if( *ptr == '+' ) is_voiced = TRUE;
ptr++;
}
c = Client_Search( ptr );
if( c )
{
Channel_Join( c, channame );
chan = Channel_Search( channame );
assert( chan != NULL );
if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
/* im Channel bekannt machen */
IRC_WriteStrChannelPrefix( Client, chan, c, FALSE, "JOIN :%s", channame );
/* Channel-User-Modes setzen */
strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
if( modes[0] )
{
/* Modes im Channel bekannt machen */
IRC_WriteStrChannelPrefix( Client, chan, Client, FALSE, "MODE %s +%s %s", channame, modes, Client_ID( c ));
}
if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
strlcat( nick_out, ptr, sizeof( nick_out ));
}
else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
/* naechsten Nick suchen */
ptr = strtok( NULL, "," );
}
/* an andere Server weiterleiten */
if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
return CONNECTED;
} /* IRC_NJOIN */
GLOBAL BOOLEAN
IRC_SQUIT( CLIENT *Client, REQUEST *Req )
{
CLIENT *target;
CHAR msg[LINE_LEN + 64];
assert( Client != NULL );
assert( Req != NULL );
/* Falsche Anzahl Parameter? */
if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
target = Client_Search( Req->argv[0] );
if( ! target )
{
/* Den Server kennen wir nicht (mehr), also nichts zu tun. */
Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
return CONNECTED;
}
if( Req->argv[1][0] )
{
if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
}
else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
if( Client_Conn( target ) > NONE )
{
/* dieser Server hat die Connection */
if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], TRUE );
else Conn_Close( Client_Conn( target ), msg, NULL, TRUE );
return DISCONNECTED;
}
else
{
/* Verbindung hielt anderer Server */
Client_Destroy( target, msg, Req->argv[1], FALSE );
return CONNECTED;
}
} /* IRC_SQUIT */
/* -eof- */
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