2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2006 Alexander Barton (alex@barton.de)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
11 * IRC commands for server links
17 static char UNUSED id[] = "$Id: irc-server.c,v 1.42 2006/12/02 14:10:48 fw Exp $";
33 #include "irc-write.h"
41 #include "irc-server.h"
45 * Handler for the IRC command "SERVER".
46 * See RFC 2813 section 4.1.2.
49 IRC_SERVER( CLIENT *Client, REQUEST *Req )
51 char str[LINE_LEN], *ptr, *modes, *topic;
52 CLIENT *from, *c, *cl;
59 assert( Client != NULL );
60 assert( Req != NULL );
62 /* Return an error if this is not a local client */
63 if (Client_Conn(Client) <= NONE)
64 return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
65 Client_ID(Client), Req->command);
67 if (Client_Type(Client) == CLIENT_GOTPASS) {
68 /* We got a PASS command from the peer, and now a SERVER
69 * command: the peer tries to register itself as a server. */
70 LogDebug("Connection %d: got SERVER command (new server link) ...",
73 /* Falsche Anzahl Parameter? */
74 if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
76 /* Ist dieser Server bei uns konfiguriert? */
77 for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
78 if( i >= MAX_SERVERS )
80 /* Server ist nicht konfiguriert! */
81 Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
82 Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", true);
85 if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
87 /* Falsches Passwort */
88 Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
89 Conn_Close( Client_Conn( Client ), NULL, "Bad password", true);
93 /* Ist ein Server mit dieser ID bereits registriert? */
94 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
96 /* Server-Strukturen fuellen ;-) */
97 Client_SetID( Client, Req->argv[0] );
98 Client_SetHops( Client, 1 );
99 Client_SetInfo( Client, Req->argv[Req->argc - 1] );
101 /* Meldet sich der Server bei uns an (d.h., bauen nicht wir
102 * selber die Verbindung zu einem anderen Server auf)? */
103 con = Client_Conn( Client );
104 if( Client_Token( Client ) != TOKEN_OUTBOUND )
106 /* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
108 if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = false;
109 else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
112 Conn_Close( con, "Unexpected server behavior!", NULL, false );
115 Client_SetIntroducer( Client, Client );
116 Client_SetToken( Client, 1 );
120 /* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
121 * an die Gegenseite uerbermittelt */
122 Client_SetToken( Client, atoi( Req->argv[1] ));
125 Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), con );
127 Client_SetType( Client, CLIENT_SERVER );
128 Conf_SetServer( i, con );
131 /* Kompression initialisieren, wenn erforderlich */
132 if( strchr( Client_Flags( Client ), 'Z' ))
134 if( ! Zip_InitConn( con ))
137 Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, false );
143 /* maximalen Hop Count ermitteln */
148 if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
149 c = Client_Next( c );
152 /* Alle bisherigen Server dem neuen Server bekannt machen,
153 * die bisherigen Server ueber den neuen informierenn */
154 for( i = 0; i < ( max_hops + 1 ); i++ )
159 if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
161 if( Client_Conn( c ) > NONE )
163 /* Dem gefundenen Server gleich den neuen
164 * Server bekannt machen */
165 if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
168 /* Den neuen Server ueber den alten informieren */
169 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;
171 c = Client_Next( c );
175 /* alle User dem neuen Server bekannt machen */
179 if( Client_Type( c ) == CLIENT_USER )
181 /* User an neuen Server melden */
182 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;
184 c = Client_Next( c );
187 /* Channels dem neuen Server bekannt machen */
188 chan = Channel_First( );
192 /* Send CHANINFO if the peer supports it */
193 if( strchr( Client_Flags( Client ), 'C' ))
196 Log( LOG_DEBUG, "Sending CHANINFO commands ..." );
198 modes = Channel_Modes( chan );
199 topic = Channel_Topic( chan );
201 if( *modes || *topic )
204 if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )) && ( ! *topic ))
206 /* "CHANINFO <chan> +<modes>" */
207 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s", Channel_Name( chan ), modes )) return DISCONNECTED;
209 else if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )))
211 /* "CHANINFO <chan> +<modes> :<topic>" */
212 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s :%s", Channel_Name( chan ), modes, topic )) return DISCONNECTED;
216 /* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
217 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s %s %lu :%s",
218 Channel_Name( chan ), modes,
219 strchr( Channel_Modes( chan ), 'k' ) ? Channel_Key( chan ) : "*",
220 strchr( Channel_Modes( chan ), 'l' ) ? Channel_MaxUsers( chan ) : 0UL, topic ))
229 /* alle Member suchen */
230 cl2chan = Channel_FirstMember( chan );
231 snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
234 cl = Channel_GetClient( cl2chan );
235 assert( cl != NULL );
237 /* Nick, ggf. mit Modes, anhaengen */
238 if( str[strlen( str ) - 1] != ':' ) strlcat( str, ",", sizeof( str ));
239 if( strchr( Channel_UserModes( chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
240 if( strchr( Channel_UserModes( chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
241 strlcat( str, Client_ID( cl ), sizeof( str ));
243 if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
246 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
247 snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
250 cl2chan = Channel_NextMember( chan, cl2chan );
254 if( str[strlen( str ) - 1] != ':')
256 /* Ja; Also senden ... */
257 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
260 /* Get next channel ... */
261 chan = Channel_Next(chan);
265 if (strchr(Client_Flags(Client), 'L')) {
268 "Synchronizing INVITE- and BAN-lists ...");
270 /* Synchronize INVITE- and BAN-lists */
271 if (! Lists_SendInvites(Client))
273 if (! Lists_SendBans(Client))
280 else if( Client_Type( Client ) == CLIENT_SERVER )
282 /* Neuer Server wird im Netz angekuendigt */
284 /* Falsche Anzahl Parameter? */
285 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
287 /* Ist ein Server mit dieser ID bereits registriert? */
288 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
290 /* Ueberfluessige Hostnamen aus Info-Text entfernen */
291 ptr = strchr( Req->argv[3] + 2, '[' );
292 if( ! ptr ) ptr = Req->argv[3];
294 from = Client_Search( Req->prefix );
297 /* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
298 Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
299 Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", true);
303 /* Neue Client-Struktur anlegen */
304 c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, true);
307 /* Neue Client-Struktur konnte nicht angelegt werden */
308 Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
309 Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", true);
313 /* Log-Meldung zusammenbauen und ausgeben */
314 if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
315 else strcpy( str, "" );
316 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": "" );
318 /* Andere Server informieren */
319 IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
323 else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
328 IRC_NJOIN( CLIENT *Client, REQUEST *Req )
330 char nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
331 bool is_op, is_voiced;
335 assert( Client != NULL );
336 assert( Req != NULL );
338 /* Falsche Anzahl Parameter? */
339 if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
341 strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
342 strcpy( nick_out, "" );
344 channame = Req->argv[0];
345 ptr = strtok( nick_in, "," );
348 is_op = is_voiced = false;
350 /* Prefixe abschneiden */
351 while(( *ptr == '@' ) || ( *ptr == '+' ))
353 if( *ptr == '@' ) is_op = true;
354 if( *ptr == '+' ) is_voiced = true;
358 c = Client_Search( ptr );
361 Channel_Join( c, channame );
362 chan = Channel_Search( channame );
363 assert( chan != NULL );
365 if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
366 if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
368 /* im Channel bekannt machen */
369 IRC_WriteStrChannelPrefix( Client, chan, c, false, "JOIN :%s", channame );
371 /* Channel-User-Modes setzen */
372 strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
375 /* Modes im Channel bekannt machen */
376 IRC_WriteStrChannelPrefix( Client, chan, Client, false, "MODE %s +%s %s", channame, modes, Client_ID( c ));
379 if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
380 if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
381 if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
382 strlcat( nick_out, ptr, sizeof( nick_out ));
384 else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
386 /* naechsten Nick suchen */
387 ptr = strtok( NULL, "," );
390 /* an andere Server weiterleiten */
391 if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
398 IRC_SQUIT( CLIENT *Client, REQUEST *Req )
401 char msg[LINE_LEN + 64];
403 assert( Client != NULL );
404 assert( Req != NULL );
406 /* Falsche Anzahl Parameter? */
407 if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
409 Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
411 target = Client_Search( Req->argv[0] );
414 /* Den Server kennen wir nicht (mehr), also nichts zu tun. */
415 Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
419 if( Req->argv[1][0] )
421 if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
422 snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
424 else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
426 if( Client_Conn( target ) > NONE )
428 /* dieser Server hat die Connection */
429 if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], true);
430 else Conn_Close( Client_Conn( target ), msg, NULL, true);
435 /* Verbindung hielt anderer Server */
436 Client_Destroy( target, msg, Req->argv[1], false );