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 1.15 2001/12/30 19:26:11 alex Exp $
17 * Revision 1.15 2001/12/30 19:26:11 alex
18 * - Unterstuetzung fuer die Konfigurationsdatei eingebaut.
20 * Revision 1.14 2001/12/30 11:42:00 alex
21 * - der Server meldet nun eine ordentliche "Start-Zeit".
23 * Revision 1.13 2001/12/29 03:10:06 alex
24 * - Neue Funktion IRC_MODE() implementiert, div. Aenderungen.
25 * - neue configure-Optione "--enable-strict-rfc".
27 * Revision 1.12 2001/12/27 19:17:26 alex
28 * - neue Befehle PRIVMSG, NOTICE, PING.
30 * Revision 1.11 2001/12/27 16:55:41 alex
31 * - neu: IRC_WriteStrRelated(), Aenderungen auch in IRC_WriteStrClient().
33 * Revision 1.10 2001/12/26 22:48:53 alex
34 * - MOTD-Datei ist nun konfigurierbar und wird gelesen.
36 * Revision 1.9 2001/12/26 14:45:37 alex
39 * Revision 1.8 2001/12/26 03:21:46 alex
40 * - PING/PONG-Befehle implementiert,
41 * - Meldungen ueberarbeitet: enthalten nun (fast) immer den Nick.
43 * Revision 1.7 2001/12/25 23:25:18 alex
44 * - und nochmal Aenderungen am Logging ;-)
46 * Revision 1.6 2001/12/25 23:13:33 alex
47 * - Debug-Meldungen angepasst.
49 * Revision 1.5 2001/12/25 22:02:42 alex
50 * - neuer IRC-Befehl "/QUIT". Verbessertes Logging & Debug-Ausgaben.
52 * Revision 1.4 2001/12/25 19:19:30 alex
53 * - bessere Fehler-Abfragen, diverse Bugfixes.
54 * - Nicks werden nur einmal vergeben :-)
55 * - /MOTD wird unterstuetzt.
57 * Revision 1.3 2001/12/24 01:34:06 alex
58 * - USER und NICK wird nun in beliebiger Reihenfolge akzeptiert (wg. BitchX)
59 * - MOTD-Ausgabe begonnen zu implementieren.
61 * Revision 1.2 2001/12/23 21:57:16 alex
62 * - erste IRC-Befehle zu implementieren begonnen.
64 * Revision 1.1 2001/12/14 08:13:43 alex
65 * - neues Modul begonnen :-)
90 #define CONNECTED TRUE
91 #define DISCONNECTED FALSE
94 LOCAL BOOLEAN Check_Valid_User( CLIENT *Client );
96 LOCAL BOOLEAN Hello_User( CLIENT *Client );
97 LOCAL BOOLEAN Show_MOTD( CLIENT *Client );
100 GLOBAL VOID IRC_Init( VOID )
105 GLOBAL VOID IRC_Exit( VOID )
110 GLOBAL BOOLEAN IRC_WriteStrClient( CLIENT *Client, CLIENT *Prefix, CHAR *Format, ... )
112 /* Text an Clients, lokal bzw. remote, senden. */
115 BOOLEAN ok = CONNECTED;
119 assert( Client != NULL );
120 assert( Format != NULL );
122 va_start( ap, Format );
123 vsnprintf( buffer, 1000, Format, ap );
126 if( Client->conn_id != NONE ) send_to = Client->conn_id;
127 else send_to = Client->introducer->conn_id;
129 if( Prefix ) ok = Conn_WriteStr( Client->conn_id, ":%s %s", Client_GetID( Prefix ), buffer );
130 else ok = Conn_WriteStr( Client->conn_id, buffer );
133 } /* IRC_WriteStrClient */
136 GLOBAL BOOLEAN IRC_WriteStrRelated( CLIENT *Client, CHAR *Format, ... )
139 BOOLEAN ok = CONNECTED;
142 assert( Client != NULL );
143 assert( Format != NULL );
145 va_start( ap, Format );
146 vsnprintf( buffer, 1000, Format, ap );
149 /* an den Client selber */
150 ok = IRC_WriteStrClient( Client, Client, buffer );
153 } /* IRC_WriteStrRelated */
156 GLOBAL BOOLEAN IRC_PASS( CLIENT *Client, REQUEST *Req )
158 assert( Client != NULL );
159 assert( Req != NULL );
161 if( Client->type == CLIENT_UNKNOWN )
163 Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client->conn_id );
164 return IRC_WriteStrClient( Client, This_Server, ERR_UNKNOWNCOMMAND_MSG, Client_Name( Client ), Req->command );
166 else return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
170 GLOBAL BOOLEAN IRC_NICK( CLIENT *Client, REQUEST *Req )
172 assert( Client != NULL );
173 assert( Req != NULL );
175 /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */
177 if( Client->type == CLIENT_UNKNOWN || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTUSER || Client->type == CLIENT_USER )
179 if( Client->type == CLIENT_UNKNOWN || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_GOTNICK || Client->type == CLIENT_USER )
182 /* Falsche Anzahl Parameter? */
183 if( Req->argc != 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
185 /* Ist der Client "restricted"? */
186 if( strchr( Client->modes, 'r' )) return IRC_WriteStrClient( Client, This_Server, ERR_RESTRICTED_MSG, Client_Name( Client ));
188 /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen
189 * wir nichts. So macht es das Original und mind. Snak hat probleme,
190 * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */
192 if( strcasecmp( Client->nick, Req->argv[0] ) == 0 ) return CONNECTED;
195 /* pruefen, ob Nick bereits vergeben */
196 if( ! Client_CheckNick( Client, Req->argv[0] )) return CONNECTED;
198 if( Client->type == CLIENT_USER )
200 /* Nick-Aenderung: allen mitteilen! */
201 Log( LOG_INFO, "User \"%s!%s@%s\" changed nick: \"%s\" -> \"%s\".", Client->nick, Client->user, Client->host, Client->nick, Req->argv[0] );
202 IRC_WriteStrRelated( Client, "NICK :%s", Req->argv[0] );
205 /* Client-Nick registrieren */
206 strcpy( Client->nick, Req->argv[0] );
208 if( Client->type != CLIENT_USER )
211 Log( LOG_DEBUG, "Connection %d: got NICK command ...", Client->conn_id );
212 if( Client->type == CLIENT_GOTUSER ) return Hello_User( Client );
213 else Client->type = CLIENT_GOTNICK;
217 else return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
221 GLOBAL BOOLEAN IRC_USER( CLIENT *Client, REQUEST *Req )
223 assert( Client != NULL );
224 assert( Req != NULL );
227 if( Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTPASS || Client->type == CLIENT_UNKNOWN )
229 if( Client->type == CLIENT_GOTNICK || Client->type == CLIENT_GOTPASS )
232 /* Falsche Anzahl Parameter? */
233 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
235 strncpy( Client->user, Req->argv[0], CLIENT_USER_LEN );
236 Client->user[CLIENT_USER_LEN] = '\0';
237 strncpy( Client->name, Req->argv[3], CLIENT_NAME_LEN );
238 Client->name[CLIENT_NAME_LEN] = '\0';
240 Log( LOG_DEBUG, "Connection %d: got USER command ...", Client->conn_id );
241 if( Client->type == CLIENT_GOTNICK ) return Hello_User( Client );
242 else Client->type = CLIENT_GOTUSER;
245 else if( Client->type == CLIENT_USER || Client->type == CLIENT_SERVER || Client->type == CLIENT_SERVICE )
247 return IRC_WriteStrClient( Client, This_Server, ERR_ALREADYREGISTRED_MSG, Client_Name( Client ));
249 else return IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
253 GLOBAL BOOLEAN IRC_QUIT( CLIENT *Client, REQUEST *Req )
255 assert( Client != NULL );
256 assert( Req != NULL );
258 if( Client->type != CLIENT_SERVER && Client->type != CLIENT_SERVICE )
260 /* Falsche Anzahl Parameter? */
261 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
263 Conn_Close( Client->conn_id, "Client wants to quit." );
266 else return IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
270 GLOBAL BOOLEAN IRC_PING( CLIENT *Client, REQUEST *Req )
274 assert( Client != NULL );
275 assert( Req != NULL );
277 if( ! Check_Valid_User( Client )) return CONNECTED;
279 /* Falsche Anzahl Parameter? */
280 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOORIGIN_MSG, Client_Name( Client ));
281 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
283 to = Client_Search( Req->argv[0] );
285 if( to ) return IRC_WriteStrClient( Client, This_Server, "PONG :%s", Client_Name( Client ));
286 else return IRC_WriteStrClient( Client, This_Server, ERR_NOSUCHNICK_MSG, Client_Name( Client ), Req->argv[0] );
290 GLOBAL BOOLEAN IRC_PONG( CLIENT *Client, REQUEST *Req )
292 assert( Client != NULL );
293 assert( Req != NULL );
295 if( ! Check_Valid_User( Client )) return CONNECTED;
297 /* Falsche Anzahl Parameter? */
298 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOORIGIN_MSG, Client_Name( Client ));
299 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
301 /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket
302 * aktualisiert, daher muss das hier nicht mehr gemacht werden. */
304 Log( LOG_DEBUG, "Connection %d: received PONG.", Client->conn_id );
309 GLOBAL BOOLEAN IRC_MOTD( CLIENT *Client, REQUEST *Req )
311 assert( Client != NULL );
312 assert( Req != NULL );
314 if( ! Check_Valid_User( Client )) return CONNECTED;
316 /* Falsche Anzahl Parameter? */
317 if( Req->argc != 0 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
319 return Show_MOTD( Client );
323 GLOBAL BOOLEAN IRC_PRIVMSG( CLIENT *Client, REQUEST *Req )
327 assert( Client != NULL );
328 assert( Req != NULL );
330 if( ! Check_Valid_User( Client )) return CONNECTED;
332 /* Falsche Anzahl Parameter? */
333 if( Req->argc == 0 ) return IRC_WriteStrClient( Client, This_Server, ERR_NORECIPIENT_MSG, Client_Name( Client ), Req->command );
334 if( Req->argc == 1 ) return IRC_WriteStrClient( Client, This_Server, ERR_NOTEXTTOSEND_MSG, Client_Name( Client ));
335 if( Req->argc > 2 ) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
337 to = Client_Search( Req->argv[0] );
340 /* Okay, Ziel ist ein User */
341 return IRC_WriteStrClient( to, Client, "PRIVMSG %s :%s", to->nick, Req->argv[1] );
344 return IRC_WriteStrClient( Client, This_Server, ERR_NOSUCHNICK_MSG, Client_Name( Client ), Req->argv[0] );
348 GLOBAL BOOLEAN IRC_NOTICE( CLIENT *Client, REQUEST *Req )
352 assert( Client != NULL );
353 assert( Req != NULL );
355 if( ! Check_Valid_User( Client )) return CONNECTED;
357 /* Falsche Anzahl Parameter? */
358 if( Req->argc != 2 ) return CONNECTED;
360 to = Client_Search( Req->argv[0] );
363 /* Okay, Ziel ist ein User */
364 return IRC_WriteStrClient( to, Client, "NOTICE %s :%s", to->nick, Req->argv[1] );
371 GLOBAL BOOLEAN IRC_MODE( CLIENT *Client, REQUEST *Req )
373 CHAR x[2], new_modes[CLIENT_MODE_LEN], *ptr, *p;
376 assert( Client != NULL );
377 assert( Req != NULL );
379 if( ! Check_Valid_User( Client )) return CONNECTED;
381 /* Falsche Anzahl Parameter? */
382 if(( Req->argc > 2 ) || ( Req->argc < 1 )) return IRC_WriteStrClient( Client, This_Server, ERR_NEEDMOREPARAMS_MSG, Client_Name( Client ), Req->command );
384 /* MODE ist nur fuer sich selber zulaessig */
385 if( Client_Search( Req->argv[0] ) != Client ) return IRC_WriteStrClient( Client, This_Server, ERR_USERSDONTMATCH_MSG, Client_Name( Client ));
387 /* Werden die Modes erfragt? */
388 if( Req->argc == 1 ) return IRC_WriteStrClient( Client, This_Server, RPL_UMODEIS_MSG, Client_Name( Client ), Client->modes );
392 /* Sollen Modes gesetzt oder geloescht werden? */
393 if( *ptr == '+' ) set = TRUE;
394 else if( *ptr == '-' ) set = FALSE;
395 else return IRC_WriteStrClient( Client, This_Server, ERR_UMODEUNKNOWNFLAG_MSG, Client_Name( Client ));
397 /* Reply-String mit Aenderungen vorbereiten */
398 if( set ) strcpy( new_modes, "+" );
399 else strcpy( new_modes, "-" );
414 /* restricted (kann nur gesetzt werden) */
415 if( set ) x[0] = 'r';
416 else ok = IRC_WriteStrClient( Client, This_Server, ERR_RESTRICTED_MSG, Client_Name( Client ));
419 ok = IRC_WriteStrClient( Client, This_Server, ERR_UMODEUNKNOWNFLAG_MSG, Client_Name( Client ));
425 if( ! x[0] ) continue;
427 /* Okay, gueltigen Mode gefunden */
430 /* Modes sollen gesetzt werden */
431 if( ! strchr( Client->modes, x[0] ))
433 /* Client hat den Mode noch nicht -> setzen */
434 strcat( Client->modes, x );
435 strcat( new_modes, x );
440 /* Modes sollen geloescht werden */
441 p = strchr( Client->modes, x[0] );
444 /* Client hat den Mode -> loeschen */
450 strcat( new_modes, x );
455 /* Geanderte Modes? */
456 if( new_modes[1] && ok )
458 ok = IRC_WriteStrRelated( Client, "MODE %s :%s", Client->nick, new_modes );
459 Log( LOG_DEBUG, "User \"%s!%s@%s\": Mode change, now \"%s\".", Client->nick, Client->user, Client->host, Client->modes );
465 LOCAL BOOLEAN Check_Valid_User( CLIENT *Client )
467 assert( Client != NULL );
469 if( Client->type != CLIENT_USER )
471 IRC_WriteStrClient( Client, This_Server, ERR_NOTREGISTERED_MSG, Client_Name( Client ));
475 } /* Check_Valid_User */
478 LOCAL BOOLEAN Hello_User( CLIENT *Client )
480 assert( Client != NULL );
481 assert( Client->nick[0] );
483 Log( LOG_NOTICE, "User \"%s!%s@%s\" (%s) registered (connection %d).", Client->nick, Client->user, Client->host, Client->name, Client->conn_id );
485 IRC_WriteStrClient( Client, This_Server, RPL_WELCOME_MSG, Client->nick, Client_GetID( Client ));
486 IRC_WriteStrClient( Client, This_Server, RPL_YOURHOST_MSG, Client->nick, This_Server->nick );
487 IRC_WriteStrClient( Client, This_Server, RPL_CREATED_MSG, Client->nick, NGIRCd_StartStr );
488 IRC_WriteStrClient( Client, This_Server, RPL_MYINFO_MSG, Client->nick, This_Server->nick );
490 Client->type = CLIENT_USER;
492 return Show_MOTD( Client );
496 LOCAL BOOLEAN Show_MOTD( CLIENT *Client )
502 assert( Client != NULL );
503 assert( Client->nick[0] );
505 fd = fopen( Conf_MotdFile, "r" );
508 Log( LOG_WARNING, "Can't read MOTD file \"%s\": %s", Conf_MotdFile, strerror( errno ));
509 return IRC_WriteStrClient( Client, This_Server, ERR_NOMOTD_MSG, Client->nick );
512 IRC_WriteStrClient( Client, This_Server, RPL_MOTDSTART_MSG, Client->nick, This_Server->nick );
515 if( ! fgets( line, 126, fd )) break;
516 if( line[strlen( line ) - 1] == '\n' ) line[strlen( line ) - 1] = '\0';
517 IRC_WriteStrClient( Client, This_Server, RPL_MOTD_MSG, Client->nick, line );
519 ok = IRC_WriteStrClient( Client, This_Server, RPL_ENDOFMOTD_MSG, Client->nick );