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Date:: Mon Mar 25 17:08:54 2002 UTC
Message:: - alle Client_GetFromID() durch Client_Search() ersetzt.
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1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
4  *
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 ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
11  *
12  * $Id: irc-server.c,v 1.7 2002/03/25 17:12:22 alex Exp $
13  *
14  * irc-server.c: IRC-Befehle fuer Server-Links
15  */
16 
17 
18 #include "portab.h"
19 
20 #include "imp.h"
21 #include <assert.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 
26 #include "conf.h"
27 #include "irc-write.h"
28 #include "log.h"
29 #include "messages.h"
30 
31 #include "exp.h"
32 #include "irc-server.h"
33 
34 
35 GLOBAL BOOLEAN IRC_SERVER( CLIENT *Client, REQUEST *Req )
36 {
37 	CHAR str[LINE_LEN], *ptr;
38 	CLIENT *from, *c, *cl;
39 	CL2CHAN *cl2chan;
40 	INT max_hops, i;
41 	CHANNEL *chan;
42 	BOOLEAN ok;
43 	
44 	assert( Client != NULL );
45 	assert( Req != NULL );
46 
47 	/* Fehler liefern, wenn kein lokaler Client */
48 	if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
49 
50 	if( Client_Type( Client ) == CLIENT_GOTPASSSERVER )
51 	{
52 		/* Verbindung soll als Server-Server-Verbindung registriert werden */
53 		Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
54 
55 		/* Falsche Anzahl Parameter? */
56 		if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
57 
58 		/* Ist dieser Server bei uns konfiguriert? */
59 		for( i = 0; i < Conf_Server_Count; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
60 		if( i >= Conf_Server_Count )
61 		{
62 			/* Server ist nicht konfiguriert! */
63 			Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
64 			Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", TRUE );
65 			return DISCONNECTED;
66 		}
67 		if( strcmp( Client_Password( Client ), Conf_Server[i].pwd ) != 0 )
68 		{
69 			/* Falsches Passwort */
70 			Log( LOG_ERR, "Connection %d: Bad password for server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
71 			Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
72 			return DISCONNECTED;
73 		}
74 		
75 		/* Ist ein Server mit dieser ID bereits registriert? */
76 		if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
77 
78 		/* Server-Strukturen fuellen ;-) */
79 		Client_SetID( Client, Req->argv[0] );
80 		Client_SetHops( Client, 1 );
81 		Client_SetInfo( Client, Req->argv[Req->argc - 1] );
82 		
83 		/* Meldet sich der Server bei uns an? */
84 		if( Req->argc == 2 )
85 		{
86 			/* Unseren SERVER- und PASS-Befehl senden */
87 			ok = TRUE;
88 			if( ! IRC_WriteStrClient( Client, "PASS %s "PASSSERVERADD, Conf_Server[i].pwd )) ok = FALSE;
89 			else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
90 			if( ! ok )
91 			{
92 				Conn_Close( Client_Conn( Client ), "Unexpected server behavior!", NULL, FALSE );
93 				return DISCONNECTED;
94 			}
95 			Client_SetIntroducer( Client, Client );
96 			Client_SetToken( Client, 1 );
97 		}
98 		else  Client_SetToken( Client, atoi( Req->argv[1] ));
99 
100 		Log( LOG_NOTICE, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), Client_Conn( Client ));
101 
102 		Client_SetType( Client, CLIENT_SERVER );
103 
104 		/* maximalen Hop Count ermitteln */
105 		max_hops = 0;
106 		c = Client_First( );
107 		while( c )
108 		{
109 			if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
110 			c = Client_Next( c );
111 		}
112 		
113 		/* Alle bisherigen Server dem neuen Server bekannt machen,
114 		 * die bisherigen Server ueber den neuen informierenn */
115 		for( i = 0; i < ( max_hops + 1 ); i++ )
116 		{
117 			c = Client_First( );
118 			while( c )
119 			{
120 				if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
121 				{
122 					if( Client_Conn( c ) > NONE )
123 					{
124 						/* Dem gefundenen Server gleich den neuen
125 						 * Server bekannt machen */
126 						if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
127 					}
128 					
129 					/* Den neuen Server ueber den alten informieren */
130 					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;
131 				}
132 				c = Client_Next( c );
133 			}
134 		}
135 
136 		/* alle User dem neuen Server bekannt machen */
137 		c = Client_First( );
138 		while( c )
139 		{
140 			if( Client_Type( c ) == CLIENT_USER )
141 			{
142 				/* User an neuen Server melden */
143 				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;
144 			}
145 			c = Client_Next( c );
146 		}
147 
148 		/* Channels dem neuen Server bekannt machen */
149 		chan = Channel_First( );
150 		while( chan )
151 		{
152 			/* alle Member suchen */
153 			cl2chan = Channel_FirstMember( chan );
154 			sprintf( str, "NJOIN %s :", Channel_Name( chan ));
155 			while( cl2chan )
156 			{
157 				cl = Channel_GetClient( cl2chan );
158 				assert( cl != NULL );
159 
160 				/* Nick, ggf. mit Modes, anhaengen */
161 				if( str[strlen( str ) - 1] != ':' ) strcat( str, "," );
162 				if( strchr( Channel_UserModes( chan, cl ), 'v' )) strcat( str, "+" );
163 				if( strchr( Channel_UserModes( chan, cl ), 'o' )) strcat( str, "@" );
164 				strcat( str, Client_ID( cl ));
165 
166 				if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
167 				{
168 					/* Zeile senden */
169 					if( ! IRC_WriteStrClient( Client, str )) return DISCONNECTED;
170 					sprintf( str, "NJOIN %s :", Channel_Name( chan ));
171 				}
172 				
173 				cl2chan = Channel_NextMember( chan, cl2chan );
174 			}
175 
176 			/* noch Daten da? */
177 			if( str[strlen( str ) - 1] != ':')
178 			{
179 				/* Ja; Also senden ... */
180 				if( ! IRC_WriteStrClient( Client, str )) return DISCONNECTED;
181 			}
182 
183 			/* naechsten Channel suchen */
184 			chan = Channel_Next( chan );
185 		}
186 		
187 		return CONNECTED;
188 	}
189 	else if( Client_Type( Client ) == CLIENT_SERVER )
190 	{
191 		/* Neuer Server wird im Netz angekuendigt */
192 
193 		/* Falsche Anzahl Parameter? */
194 		if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
195 
196 		/* Ist ein Server mit dieser ID bereits registriert? */
197 		if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
198 
199 		/* Ueberfluessige Hostnamen aus Info-Text entfernen */
200 		ptr = strchr( Req->argv[3] + 2, '[' );
201 		if( ! ptr ) ptr = Req->argv[3];
202 
203 		from = Client_Search( Req->prefix );
204 		if( ! from )
205 		{
206 			/* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
207 			Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
208 			Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", TRUE );
209 			return DISCONNECTED;
210 		}
211 
212 		/* Neue Client-Struktur anlegen */
213 		c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, TRUE );
214 		if( ! c )
215 		{
216 			/* Neue Client-Struktur konnte nicht angelegt werden */
217 			Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
218 			Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", TRUE );
219 			return DISCONNECTED;
220 		}
221 
222 		/* Log-Meldung zusammenbauen und ausgeben */
223 		if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) sprintf( str, "connected to %s, ", Client_ID( from ));
224 		else strcpy( str, "" );
225 		Log( LOG_NOTICE, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
226 
227 		/* Andere Server informieren */
228 		IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
229 
230 		return CONNECTED;
231 	}
232 	else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
233 } /* IRC_SERVER */
234 
235 
236 GLOBAL BOOLEAN IRC_NJOIN( CLIENT *Client, REQUEST *Req )
237 {
238 	CHAR *channame, *ptr, modes[8];
239 	BOOLEAN is_op, is_voiced;
240 	CHANNEL *chan;
241 	CLIENT *c;
242 	
243 	assert( Client != NULL );
244 	assert( Req != NULL );
245 
246 	if( Client_Type( Client ) != CLIENT_SERVER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTEREDSERVER_MSG, Client_ID( Client ));
247 
248 	/* Falsche Anzahl Parameter? */
249 	if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
250 
251 	channame = Req->argv[0];
252 	ptr = strtok( Req->argv[1], "," );
253 	while( ptr )
254 	{
255 		is_op = is_voiced = FALSE;
256 		
257 		/* Prefixe abschneiden */
258 		while(( *ptr == '@' ) || ( *ptr == '+' ))
259 		{
260 			if( *ptr == '@' ) is_op = TRUE;
261 			if( *ptr == '+' ) is_voiced = TRUE;
262 			ptr++;
263 		}
264 
265 		c = Client_Search( ptr );
266 		if( c )
267 		{
268 			Channel_Join( c, channame );
269 			chan = Channel_Search( channame );
270 			assert( chan != NULL );
271 			
272 			if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
273 			if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
274 
275 			/* im Channel bekannt machen */
276 			IRC_WriteStrChannelPrefix( Client, chan, c, FALSE, "JOIN :%s", channame );
277 
278 			/* Channel-User-Modes setzen */
279 			strcpy( modes, Channel_UserModes( chan, c ));
280 			if( modes[0] )
281 			{
282 				/* Modes im Channel bekannt machen */
283 				IRC_WriteStrChannelPrefix( Client, chan, Client, FALSE, "MODE %s +%s %s", channame, modes, Client_ID( c ));
284 			}
285 		}
286 		else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
287 		
288 		/* naechsten Nick suchen */
289 		ptr = strtok( NULL, "," );
290 	}
291 
292 	/* an andere Server weiterleiten */
293 	IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], Req->argv[1] );
294 
295 	return CONNECTED;
296 } /* IRC_NJOIN */
297 
298 
299 GLOBAL BOOLEAN IRC_SQUIT( CLIENT *Client, REQUEST *Req )
300 {
301 	CLIENT *target;
302 	CHAR msg[LINE_LEN + 64];
303 
304 	assert( Client != NULL );
305 	assert( Req != NULL );
306 
307 	/* SQUIT ist nur fuer Server erlaubt */
308 	if( Client_Type( Client ) != CLIENT_SERVER ) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client ));
309 
310 	/* Falsche Anzahl Parameter? */
311 	if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
312 
313 	Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
314 
315 	/* SQUIT an alle Server weiterleiten */
316 	IRC_WriteStrServers( Client, "SQUIT %s :%s", Req->argv[0], Req->argv[1] );
317 
318 	target = Client_Search( Req->argv[0] );
319 	if( ! target )
320 	{
321 		/* Den Server kennen wir nicht (mehr), also nichts zu tun. */
322 		Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
323 		return CONNECTED;
324 	}
325 
326 	if( Req->argv[1][0] )
327 	{
328 		if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
329 		sprintf( msg, "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
330 	}
331 	else sprintf( msg, "Got SQUIT from %s.", Client_ID( Client ));
332 
333 	if( Client_Conn( target ) > NONE )
334 	{
335 		/* dieser Server hat die Connection */
336 		if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], TRUE );
337 		else Conn_Close( Client_Conn( target ), msg, NULL, TRUE );
338 		return DISCONNECTED;
339 	}
340 	else
341 	{
342 		/* Verbindung hielt anderer Server */
343 		Client_Destroy( target, msg, Req->argv[1], FALSE );
344 		return CONNECTED;
345 	}
346 } /* IRC_SQUIT */
347 
348 
349 /* -eof- */