336 lines
10 KiB
C
336 lines
10 KiB
C
/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001-2007 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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* IRC commands for server links
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*/
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#include "portab.h"
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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 <strings.h>
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#include "defines.h"
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#include "resolve.h"
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#include "conn.h"
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#include "conn-func.h"
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#include "conn-zip.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 "irc-write.h"
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#include "lists.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 "numeric.h"
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#include "ngircd.h"
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#include "irc-info.h"
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#include "exp.h"
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#include "irc-server.h"
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/**
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* Handler for the IRC command "SERVER".
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* See RFC 2813 section 4.1.2.
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*/
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GLOBAL bool
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IRC_SERVER( CLIENT *Client, REQUEST *Req )
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{
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char str[LINE_LEN], *ptr;
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CLIENT *from, *c;
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bool ok;
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int i;
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CONN_ID con;
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assert( Client != NULL );
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assert( Req != NULL );
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/* Return an error if this is not a local client */
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if (Client_Conn(Client) <= NONE)
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return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
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Client_ID(Client), Req->command);
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if (Client_Type(Client) == CLIENT_GOTPASS ||
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Client_Type(Client) == CLIENT_GOTPASS_2813) {
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/* We got a PASS command from the peer, and now a SERVER
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* command: the peer tries to register itself as a server. */
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LogDebug("Connection %d: got SERVER command (new server link) ...",
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Client_Conn(Client));
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/* Falsche Anzahl Parameter? */
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if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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/* Ist dieser Server bei uns konfiguriert? */
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for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
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if( i >= MAX_SERVERS )
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{
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/* Server ist nicht konfiguriert! */
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Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
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Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", true);
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return DISCONNECTED;
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}
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if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
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{
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/* Falsches Passwort */
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Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
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Conn_Close( Client_Conn( Client ), NULL, "Bad password", true);
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return DISCONNECTED;
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}
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/* Ist ein Server mit dieser ID bereits registriert? */
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if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
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/* Server-Strukturen fuellen ;-) */
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Client_SetID( Client, Req->argv[0] );
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Client_SetHops( Client, 1 );
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Client_SetInfo( Client, Req->argv[Req->argc - 1] );
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/* Meldet sich der Server bei uns an (d.h., bauen nicht wir
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* selber die Verbindung zu einem anderen Server auf)? */
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con = Client_Conn( Client );
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if( Client_Token( Client ) != TOKEN_OUTBOUND )
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{
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/* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
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ok = true;
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if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = false;
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else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
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if( ! ok )
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{
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Conn_Close( con, "Unexpected server behavior!", NULL, false );
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return DISCONNECTED;
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}
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Client_SetIntroducer( Client, Client );
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Client_SetToken( Client, 1 );
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}
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else
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{
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/* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
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* an die Gegenseite uerbermittelt */
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Client_SetToken( Client, atoi( Req->argv[1] ));
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}
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/* Mark this connection as belonging to an configured server */
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Conf_SetServer(i, con);
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/* Check protocol level */
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if (Client_Type(Client) == CLIENT_GOTPASS) {
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/* We got a "simple" PASS command, so the peer is
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* using the protocol as defined in RFC 1459. */
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if (! (Conn_Options(con) & CONN_RFC1459))
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Log(LOG_INFO,
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"Switching connection %d (\"%s\") to RFC 1459 compatibility mode.",
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con, Client_ID(Client));
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Conn_SetOption(con, CONN_RFC1459);
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}
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Client_SetType(Client, CLIENT_UNKNOWNSERVER);
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#ifdef ZLIB
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/* Kompression initialisieren, wenn erforderlich */
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if( strchr( Client_Flags( Client ), 'Z' ))
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{
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if( ! Zip_InitConn( con ))
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{
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/* Fehler! */
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Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, false );
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return DISCONNECTED;
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}
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}
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#endif
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#ifdef IRCPLUS
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if (strchr(Client_Flags(Client), 'H')) {
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LogDebug("Peer supports IRC+ extended server handshake ...");
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if (!IRC_Send_ISUPPORT(Client))
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return DISCONNECTED;
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return IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG,
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Client_ID(Client));
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} else {
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#endif
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if (Conf_MaxNickLength != CLIENT_NICK_LEN_DEFAULT)
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Log(LOG_CRIT,
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"Attention: this server uses a non-standard nick length, but the peer doesn't support the IRC+ extended server handshake!");
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#ifdef IRCPLUS
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}
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#endif
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return IRC_Num_ENDOFMOTD(Client, Req);
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}
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else if( Client_Type( Client ) == CLIENT_SERVER )
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{
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/* Neuer Server wird im Netz angekuendigt */
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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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/* Ist ein Server mit dieser ID bereits registriert? */
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if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
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/* Ueberfluessige Hostnamen aus Info-Text entfernen */
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ptr = strchr( Req->argv[3] + 2, '[' );
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if( ! ptr ) ptr = Req->argv[3];
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from = Client_Search( Req->prefix );
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if( ! from )
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{
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/* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
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Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
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Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", true);
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return DISCONNECTED;
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}
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/* Neue Client-Struktur anlegen */
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c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, true);
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if( ! c )
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{
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/* Neue Client-Struktur konnte nicht angelegt werden */
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Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
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Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", true);
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return DISCONNECTED;
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}
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/* Log-Meldung zusammenbauen und ausgeben */
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if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
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else strcpy( str, "" );
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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": "" );
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/* Andere Server informieren */
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IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
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return CONNECTED;
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} else
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return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
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Client_ID(Client), Req->command);
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} /* IRC_SERVER */
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GLOBAL bool
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IRC_NJOIN( CLIENT *Client, REQUEST *Req )
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{
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char nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
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bool is_op, is_voiced;
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CHANNEL *chan;
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CLIENT *c;
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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 != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
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strcpy( nick_out, "" );
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channame = Req->argv[0];
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ptr = strtok( nick_in, "," );
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while( ptr )
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{
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is_op = is_voiced = false;
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/* Prefixe abschneiden */
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while(( *ptr == '@' ) || ( *ptr == '+' ))
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{
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if( *ptr == '@' ) is_op = true;
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if( *ptr == '+' ) is_voiced = true;
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ptr++;
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}
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c = Client_Search( ptr );
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if( c )
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{
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Channel_Join( c, channame );
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chan = Channel_Search( channame );
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assert( chan != NULL );
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if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
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if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
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/* im Channel bekannt machen */
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IRC_WriteStrChannelPrefix( Client, chan, c, false, "JOIN :%s", channame );
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/* Channel-User-Modes setzen */
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strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
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if( modes[0] )
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{
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/* Modes im Channel bekannt machen */
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IRC_WriteStrChannelPrefix( Client, chan, Client, false, "MODE %s +%s %s", channame, modes, Client_ID( c ));
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}
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if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
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if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
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if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
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strlcat( nick_out, ptr, sizeof( nick_out ));
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}
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else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
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/* naechsten Nick suchen */
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ptr = strtok( NULL, "," );
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}
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/* an andere Server weiterleiten */
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if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
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return CONNECTED;
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} /* IRC_NJOIN */
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GLOBAL bool
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IRC_SQUIT( CLIENT *Client, REQUEST *Req )
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{
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CLIENT *target;
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char msg[LINE_LEN + 64];
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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 != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
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Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
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target = Client_Search( Req->argv[0] );
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if( ! target )
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{
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/* Den Server kennen wir nicht (mehr), also nichts zu tun. */
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Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
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return CONNECTED;
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}
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if( Req->argv[1][0] )
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{
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if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
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snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
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}
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else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
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if( Client_Conn( target ) > NONE )
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{
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/* dieser Server hat die Connection */
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if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], true);
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else Conn_Close( Client_Conn( target ), msg, NULL, true);
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return DISCONNECTED;
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}
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else
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{
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/* Verbindung hielt anderer Server */
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Client_Destroy( target, msg, Req->argv[1], false );
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return CONNECTED;
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}
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} /* IRC_SQUIT */
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/* -eof- */
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