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- /*
- * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2006 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 1.39.2.3 2007/04/03 20:23:31 fw Exp $";
- #include "imp.h"
- #include <assert.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <strings.h>
- #include "defines.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 "lists.h"
- #include "log.h"
- #include "messages.h"
- #include "parse.h"
- #include "ngircd.h"
- #include "exp.h"
- #include "irc-server.h"
- #ifdef IRCPLUS
- static bool
- Synchronize_Lists( CLIENT *Client )
- {
- CHANNEL *c;
- struct list_head *head;
- struct list_elem *elem;
- assert( Client != NULL );
- c = Channel_First();
- while (c) {
- head = Channel_GetListBans(c);
- elem = Lists_GetFirst(head);
- while (elem) {
- if( ! IRC_WriteStrClient( Client, "MODE %s +b %s",
- Channel_Name(c), Lists_GetMask(elem)))
- {
- return false;
- }
- elem = Lists_GetNext(elem);
- }
- head = Channel_GetListInvites(c);
- elem = Lists_GetFirst(head);
- while (elem) {
- if( ! IRC_WriteStrClient( Client, "MODE %s +I %s",
- Channel_Name( c ), Lists_GetMask(elem)))
- {
- return false;
- }
- elem = Lists_GetNext(elem);
- }
- c = Channel_Next(c);
- }
- return true;
- }
- #endif
- /**
- * Handler for the IRC command "SERVER".
- * See RFC 2813 section 4.1.2.
- */
- GLOBAL bool
- 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;
- bool ok;
- CONN_ID con;
-
- assert( Client != NULL );
- assert( Req != NULL );
- /* Return an error if this is not a local client */
- if (Client_Conn(Client) <= NONE)
- return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
- Client_ID(Client), Req->command);
- if (Client_Type(Client) == CLIENT_GOTPASS) {
- /* We got a PASS command from the peer, and now a SERVER
- * command: the peer tries to register itself as a server. */
- LogDebug("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' ))
- {
- #ifdef DEBUG
- Log( LOG_DEBUG, "Sending CHANINFO commands ..." );
- #endif
- 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 %lu :%s",
- Channel_Name( chan ), modes,
- strchr( Channel_Modes( chan ), 'k' ) ? Channel_Key( chan ) : "*",
- strchr( Channel_Modes( chan ), 'l' ) ? Channel_MaxUsers( chan ) : 0UL, 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;
- }
- /* Get next channel ... */
- chan = Channel_Next(chan);
- }
- #ifdef IRCPLUS
- if (strchr(Client_Flags(Client), 'L')) {
- #ifdef DEBUG
- Log(LOG_DEBUG,
- "Synchronizing INVITE- and BAN-lists ...");
- #endif
- /* Synchronize INVITE- and BAN-lists */
- if (!Synchronize_Lists(Client))
- return DISCONNECTED;
- }
- #endif
- 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 bool
- IRC_NJOIN( CLIENT *Client, REQUEST *Req )
- {
- char nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
- bool 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 bool
- 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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