2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001 by Alexander Barton (alex@barton.de)
5 * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
6 * der GNU General Public License (GPL), wie von der Free Software Foundation
7 * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
8 * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
9 * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
10 * der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
12 * $Id: irc.c,v 1.14 2001/12/30 11:42:00 alex Exp $
17 * Revision 1.14 2001/12/30 11:42:00 alex
18 * - der Server meldet nun eine ordentliche "Start-Zeit".
20 * Revision 1.13 2001/12/29 03:10:06 alex
21 * - Neue Funktion IRC_MODE() implementiert, div. Aenderungen.
22 * - neue configure-Optione "--enable-strict-rfc".
24 * Revision 1.12 2001/12/27 19:17:26 alex
25 * - neue Befehle PRIVMSG, NOTICE, PING.
27 * Revision 1.11 2001/12/27 16:55:41 alex
28 * - neu: IRC_WriteStrRelated(), Aenderungen auch in IRC_WriteStrClient().
30 * Revision 1.10 2001/12/26 22:48:53 alex
31 * - MOTD-Datei ist nun konfigurierbar und wird gelesen.
33 * Revision 1.9 2001/12/26 14:45:37 alex
36 * Revision 1.8 2001/12/26 03:21:46 alex
37 * - PING/PONG-Befehle implementiert,
38 * - Meldungen ueberarbeitet: enthalten nun (fast) immer den Nick.
40 * Revision 1.7 2001/12/25 23:25:18 alex
41 * - und nochmal Aenderungen am Logging ;-)
43 * Revision 1.6 2001/12/25 23:13:33 alex
44 * - Debug-Meldungen angepasst.
46 * Revision 1.5 2001/12/25 22:02:42 alex
47 * - neuer IRC-Befehl "/QUIT". Verbessertes Logging & Debug-Ausgaben.
49 * Revision 1.4 2001/12/25 19:19:30 alex
50 * - bessere Fehler-Abfragen, diverse Bugfixes.
51 * - Nicks werden nur einmal vergeben :-)
52 * - /MOTD wird unterstuetzt.
54 * Revision 1.3 2001/12/24 01:34:06 alex
55 * - USER und NICK wird nun in beliebiger Reihenfolge akzeptiert (wg. BitchX)
56 * - MOTD-Ausgabe begonnen zu implementieren.
58 * Revision 1.2 2001/12/23 21:57:16 alex
59 * - erste IRC-Befehle zu implementieren begonnen.
61 * Revision 1.1 2001/12/14 08:13:43 alex
62 * - neues Modul begonnen :-)
87 #define CONNECTED TRUE
88 #define DISCONNECTED FALSE
91 LOCAL BOOLEAN Check_Valid_User( CLIENT *Client );
93 LOCAL BOOLEAN Hello_User( CLIENT *Client );
94 LOCAL BOOLEAN Show_MOTD( CLIENT *Client );
97 GLOBAL VOID IRC_Init( VOID )
102 GLOBAL VOID IRC_Exit( VOID )
107 GLOBAL BOOLEAN IRC_WriteStrClient( CLIENT *Client, CLIENT *Prefix, CHAR *Format, ... )
109 /* Text an Clients, lokal bzw. remote, senden. */
112 BOOLEAN ok = CONNECTED;
116 assert( Client != NULL );
117 assert( Format != NULL );
119 va_start( ap, Format );
120 vsnprintf( buffer, 1000, Format, ap );
123 if( Client->conn_id != NONE ) send_to = Client->conn_id;
124 else send_to = Client->introducer->conn_id;
126 if( Prefix ) ok = Conn_WriteStr( Client->conn_id, ":%s %s", Client_GetID( Prefix ), buffer );
127 else ok = Conn_WriteStr( Client->conn_id, buffer );
130 } /* IRC_WriteStrClient */
133 GLOBAL BOOLEAN IRC_WriteStrRelated( CLIENT *Client, CHAR *Format, ... )
136 BOOLEAN ok = CONNECTED;
139 assert( Client != NULL );
140 assert( Format != NULL );
142 va_start( ap, Format );
143 vsnprintf( buffer, 1000, Format, ap );
146 /* an den Client selber */
147 ok = IRC_WriteStrClient( Client, Client, buffer );
150 } /* IRC_WriteStrRelated */
153 GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
155 assert( Client != NULL );
156 assert( Req != NULL );
158 if( Client->type == CLIENT_UNKNOWN )
160 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client->conn_id );
161 return IRC_WriteStrClient( Client, This_Server, ERR_UNKNOWNCOMMAND_MSG, Client_Name( Client ), Req->command );
163 else return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
167 GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
169 assert( Client != NULL );
170 assert( Req != NULL );
172 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
174 if( Client->type == CLIENT_UNKNOWN || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTUSER || Client->type == CLIENT_USER )
176 if( Client->type == CLIENT_UNKNOWN || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_GOTNICK || Client->type == CLIENT_USER )
179 /* Falsche Anzahl Parameter? */
180 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
182 /* Ist der Client "restricted"? */
183 if( strchr( Client->modes, 'r' )) return IRC_WriteStrClient( Client, This_Server, ERR_RESTRICTED_MSG, Client_Name( Client ));
185 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
186 * wir nichts. So macht es das Original und mind. Snak hat probleme,
187 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
189 if( strcasecmp( Client->nick, Req->argv[0] ) == 0 ) return CONNECTED;
192 /* pruefen, ob Nick bereits vergeben */
193 if( ! Client_CheckNick( Client, Req->argv[0] )) return CONNECTED;
195 if( Client->type == CLIENT_USER )
197 /* Nick-Aenderung: allen mitteilen! */
198 Log( LOG_INFO, "User \"%s!%s@%s\" changed nick: \"%s\" -> \"%s\".", Client->nick, Client->user, Client->host, Client->nick, Req->argv[0] );
199 IRC_WriteStrRelated( Client, "NICK :%s", Req->argv[0] );
202 /* Client-Nick registrieren */
203 strcpy( Client->nick, Req->argv[0] );
205 if( Client->type != CLIENT_USER )
208 Log( LOG_DEBUG, "Connection %d: got NICK command ...", Client->conn_id );
209 if( Client->type == CLIENT_GOTUSER ) return Hello_User( Client );
210 else Client->type = CLIENT_GOTNICK;
214 else return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
218 GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
220 assert( Client != NULL );
221 assert( Req != NULL );
224 if( Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_UNKNOWN )
226 if( Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTPASS )
229 /* Falsche Anzahl Parameter? */
230 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
232 strncpy( Client->user, Req->argv[0], CLIENT_USER_LEN );
233 Client->user[CLIENT_USER_LEN] = '\0';
234 strncpy( Client->name, Req->argv[3], CLIENT_NAME_LEN );
235 Client->name[CLIENT_NAME_LEN] = '\0';
237 Log( LOG_DEBUG, "Connection %d: got USER command ...", Client->conn_id );
238 if( Client->type == CLIENT_GOTNICK ) return Hello_User( Client );
239 else Client->type = CLIENT_GOTUSER;
242 else if( Client->type == CLIENT_USER || Client->type == CLIENT_SERVER || Client->type == CLIENT_SERVICE )
244 return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
246 else return IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
250 GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
252 assert( Client != NULL );
253 assert( Req != NULL );
255 if( Client->type != CLIENT_SERVER && Client->type != CLIENT_SERVICE )
257 /* Falsche Anzahl Parameter? */
258 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
260 Conn_Close( Client->conn_id, "Client wants to quit." );
263 else return IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
267 GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
271 assert( Client != NULL );
272 assert( Req != NULL );
274 if( ! Check_Valid_User( Client )) return CONNECTED;
276 /* Falsche Anzahl Parameter? */
277 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOORIGIN_MSG, Client_Name( Client ));
278 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
280 to = Client_Search( Req->argv[0] );
282 if( to ) return IRC_WriteStrClient( Client, This_Server, "PONG :%s", Client_Name( Client ));
283 else return IRC_WriteStrClient( Client, This_Server, ERR_NOSUCHNICK_MSG, Client_Name( Client ), Req->argv[0] );
287 GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
289 assert( Client != NULL );
290 assert( Req != NULL );
292 if( ! Check_Valid_User( Client )) return CONNECTED;
294 /* Falsche Anzahl Parameter? */
295 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOORIGIN_MSG, Client_Name( Client ));
296 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
298 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
299 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
301 Log( LOG_DEBUG, "Connection %d: received PONG.", Client->conn_id );
306 GLOBAL BOOLEAN IRC_MOTD( CLIENT *Client, REQUEST *Req )
308 assert( Client != NULL );
309 assert( Req != NULL );
311 if( ! Check_Valid_User( Client )) return CONNECTED;
313 /* Falsche Anzahl Parameter? */
314 if( Req->argc != 0 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
316 return Show_MOTD( Client );
320 GLOBAL BOOLEAN IRC_PRIVMSG( CLIENT *Client, REQUEST *Req )
324 assert( Client != NULL );
325 assert( Req != NULL );
327 if( ! Check_Valid_User( Client )) return CONNECTED;
329 /* Falsche Anzahl Parameter? */
330 if( Req->argc == 0 ) return IRC_WriteStrClient( Client, This_Server, ERR_NORECIPIENT_MSG, Client_Name( Client ), Req->command );
331 if( Req->argc == 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOTEXTTOSEND_MSG, Client_Name( Client ));
332 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
334 to = Client_Search( Req->argv[0] );
337 /* Okay, Ziel ist ein User */
338 return IRC_WriteStrClient( to, Client, "PRIVMSG %s :%s", to->nick, Req->argv[1] );
341 return IRC_WriteStrClient( Client, This_Server, ERR_NOSUCHNICK_MSG, Client_Name( Client ), Req->argv[0] );
345 GLOBAL BOOLEAN IRC_NOTICE( CLIENT *Client, REQUEST *Req )
349 assert( Client != NULL );
350 assert( Req != NULL );
352 if( ! Check_Valid_User( Client )) return CONNECTED;
354 /* Falsche Anzahl Parameter? */
355 if( Req->argc != 2 ) return CONNECTED;
357 to = Client_Search( Req->argv[0] );
360 /* Okay, Ziel ist ein User */
361 return IRC_WriteStrClient( to, Client, "NOTICE %s :%s", to->nick, Req->argv[1] );
368 GLOBAL BOOLEAN IRC_MODE( CLIENT *Client, REQUEST *Req )
370 CHAR x[2], new_modes[CLIENT_MODE_LEN], *ptr, *p;
373 assert( Client != NULL );
374 assert( Req != NULL );
376 if( ! Check_Valid_User( Client )) return CONNECTED;
378 /* Falsche Anzahl Parameter? */
379 if(( Req->argc > 2 ) || ( Req->argc < 1 )) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
381 /* MODE ist nur fuer sich selber zulaessig */
382 if( Client_Search( Req->argv[0] ) != Client ) return IRC_WriteStrClient( Client, This_Server, ERR_USERSDONTMATCH_MSG, Client_Name( Client ));
384 /* Werden die Modes erfragt? */
385 if( Req->argc == 1 ) return IRC_WriteStrClient( Client, This_Server, RPL_UMODEIS_MSG, Client_Name( Client ), Client->modes );
389 /* Sollen Modes gesetzt oder geloescht werden? */
390 if( *ptr == '+' ) set = TRUE;
391 else if( *ptr == '-' ) set = FALSE;
392 else return IRC_WriteStrClient( Client, This_Server, ERR_UMODEUNKNOWNFLAG_MSG, Client_Name( Client ));
394 /* Reply-String mit Aenderungen vorbereiten */
395 if( set ) strcpy( new_modes, "+" );
396 else strcpy( new_modes, "-" );
411 /* restricted (kann nur gesetzt werden) */
412 if( set ) x[0] = 'r';
413 else ok = IRC_WriteStrClient( Client, This_Server, ERR_RESTRICTED_MSG, Client_Name( Client ));
416 ok = IRC_WriteStrClient( Client, This_Server, ERR_UMODEUNKNOWNFLAG_MSG, Client_Name( Client ));
422 if( ! x[0] ) continue;
424 /* Okay, gueltigen Mode gefunden */
427 /* Modes sollen gesetzt werden */
428 if( ! strchr( Client->modes, x[0] ))
430 /* Client hat den Mode noch nicht -> setzen */
431 strcat( Client->modes, x );
432 strcat( new_modes, x );
437 /* Modes sollen geloescht werden */
438 p = strchr( Client->modes, x[0] );
441 /* Client hat den Mode -> loeschen */
447 strcat( new_modes, x );
452 /* Geanderte Modes? */
453 if( new_modes[1] && ok )
455 ok = IRC_WriteStrRelated( Client, "MODE %s :%s", Client->nick, new_modes );
456 Log( LOG_DEBUG, "User \"%s!%s@%s\": Mode change, now \"%s\".", Client->nick, Client->user, Client->host, Client->modes );
462 LOCAL BOOLEAN Check_Valid_User( CLIENT *Client )
464 assert( Client != NULL );
466 if( Client->type != CLIENT_USER )
468 IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
472 } /* Check_Valid_User */
475 LOCAL BOOLEAN Hello_User( CLIENT *Client )
477 assert( Client != NULL );
478 assert( Client->nick[0] );
480 Log( LOG_NOTICE, "User \"%s!%s@%s\" (%s) registered (connection %d).", Client->nick, Client->user, Client->host, Client->name, Client->conn_id );
482 IRC_WriteStrClient( Client, This_Server, RPL_WELCOME_MSG, Client->nick, Client_GetID( Client ));
483 IRC_WriteStrClient( Client, This_Server, RPL_YOURHOST_MSG, Client->nick, This_Server->host );
484 IRC_WriteStrClient( Client, This_Server, RPL_CREATED_MSG, Client->nick, NGIRCd_StartStr );
485 IRC_WriteStrClient( Client, This_Server, RPL_MYINFO_MSG, Client->nick, This_Server->host );
487 Client->type = CLIENT_USER;
489 return Show_MOTD( Client );
493 LOCAL BOOLEAN Show_MOTD( CLIENT *Client )
499 assert( Client != NULL );
500 assert( Client->nick[0] );
502 fd = fopen( Conf_MotdFile, "r" );
505 Log( LOG_WARNING, "Can't read MOTD file \"%s\": %s", Conf_MotdFile, strerror( errno ));
506 return IRC_WriteStrClient( Client, This_Server, ERR_NOMOTD_MSG, Client->nick );
509 IRC_WriteStrClient( Client, This_Server, RPL_MOTDSTART_MSG, Client->nick, This_Server->host );
512 if( ! fgets( line, 126, fd )) break;
513 if( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
514 IRC_WriteStrClient( Client, This_Server, RPL_MOTD_MSG, Client->nick, line );
516 ok = IRC_WriteStrClient( Client, This_Server, RPL_ENDOFMOTD_MSG, Client->nick );