X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fparse.c;h=6d1efef660a00ddc6cdc9168440bf71c3f7b2a90;hp=a1348fe2d45333acfa69b4d106b71e205f55d29b;hb=5502fb271db2b9466a571d0c8b7b3352e43ae537;hpb=9d2407dbc50ccebc8cfc3bb1748665a51cf506a0

diff --git a/src/ngircd/parse.c b/src/ngircd/parse.c
index a1348fe2..6d1efef6 100644
--- a/src/ngircd/parse.c
+++ b/src/ngircd/parse.c
@@ -9,7 +9,7 @@
  * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
  * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
  *
- * $Id: parse.c,v 1.32 2002/04/23 19:50:27 alex Exp $
+ * $Id: parse.c,v 1.41 2002/09/16 09:20:27 alex Exp $
  *
  * parse.c: Parsen der Client-Anfragen
  */
@@ -24,36 +24,41 @@
 #include <string.h>
 
 #include "ngircd.h"
-#include "client.h"
-#include "conn.h"
 #include "defines.h"
+#include "conn.h"
+#include "client.h"
+#include "channel.h"
+#include "log.h"
+#include "messages.h"
+#include "tool.h"
+
+#include "exp.h"
+#include "parse.h"
+
+#include "imp.h"
 #include "irc.h"
 #include "irc-channel.h"
 #include "irc-login.h"
 #include "irc-mode.h"
+#include "irc-op.h"
 #include "irc-oper.h"
 #include "irc-server.h"
 #include "irc-write.h"
-#include "log.h"
-#include "messages.h"
-#include "tool.h"
 
 #include "exp.h"
-#include "parse.h"
 
 
-LOCAL VOID Init_Request( REQUEST *Req );
+LOCAL VOID Init_Request PARAMS(( REQUEST *Req ));
 
-LOCAL BOOLEAN Parse_Error( CONN_ID Idx, CHAR *Error );
+LOCAL BOOLEAN Validate_Prefix PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
+LOCAL BOOLEAN Validate_Command PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
+LOCAL BOOLEAN Validate_Args PARAMS(( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed ));
 
-LOCAL BOOLEAN Validate_Prefix( REQUEST *Req );
-LOCAL BOOLEAN Validate_Command( REQUEST *Req );
-LOCAL BOOLEAN Validate_Args( REQUEST *Req );
+LOCAL BOOLEAN Handle_Request PARAMS(( CONN_ID Idx, REQUEST *Req ));
 
-LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req );
 
-
-GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
+GLOBAL BOOLEAN
+Parse_Request( CONN_ID Idx, CHAR *Request )
 {
 	/* Client-Request parsen. Bei einem schwerwiegenden Fehler wird
 	 * die Verbindung geschlossen und FALSE geliefert.
@@ -61,6 +66,7 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 
 	REQUEST req;
 	CHAR *start, *ptr;
+	BOOLEAN closed;
 
 	assert( Idx >= 0 );
 	assert( Request != NULL );
@@ -68,7 +74,7 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 #ifdef SNIFFER
 	if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " <- connection %d: '%s'.", Idx, Request );
 #endif
-	
+
 	Init_Request( &req );
 
 	/* Fuehrendes und folgendes "Geraffel" verwerfen */
@@ -80,7 +86,11 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 		/* Prefix vorhanden */
 		req.prefix = Request + 1;
 		ptr = strchr( Request, ' ' );
-		if( ! ptr ) return Parse_Error( Idx, "Prefix without command!?" );
+		if( ! ptr )
+		{
+			Log( LOG_DEBUG, "Connection %d: Parse error: prefix without command!?", Idx );
+			return Conn_WriteStr( Idx, "ERROR :Prefix without command!?" );
+		}
 		*ptr = '\0';
 #ifndef STRICT_RFC
 		/* multiple Leerzeichen als Trenner zwischen
@@ -91,7 +101,7 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 	}
 	else start = Request;
 
-	if( ! Validate_Prefix( &req )) return Parse_Error( Idx, "Invalid prefix");
+	if( ! Validate_Prefix( Idx, &req, &closed )) return ! closed;
 
 	/* Befehl */
 	ptr = strchr( start, ' ' );
@@ -106,7 +116,7 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 	}
 	req.command = start;
 
-	if( ! Validate_Command( &req )) return Parse_Error( Idx, "Invalid command" );
+	if( ! Validate_Command( Idx, &req, &closed )) return ! closed;
 
 	/* Argumente, Parameter */
 	if( ptr )
@@ -135,29 +145,30 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 #endif
 				}
 			}
-			
+
 			req.argc++;
 
 			if( start[0] == ':' ) break;
 			if( req.argc > 14 ) break;
-			
+
 			if( ptr ) start = ptr + 1;
 			else start = NULL;
 		}
 	}
-	
-	if( ! Validate_Args( &req )) return Parse_Error( Idx, "Invalid argument(s)" );
+
+	if( ! Validate_Args( Idx, &req, &closed )) return ! closed;
 
 	return Handle_Request( Idx, &req );
 } /* Parse_Request */
 
 
-LOCAL VOID Init_Request( REQUEST *Req )
+LOCAL VOID
+Init_Request( REQUEST *Req )
 {
 	/* Neue Request-Struktur initialisieren */
 
 	INT i;
-	
+
 	assert( Req != NULL );
 
 	Req->prefix = NULL;
@@ -167,42 +178,83 @@ LOCAL VOID Init_Request( REQUEST *Req )
 } /* Init_Request */
 
 
-LOCAL BOOLEAN Parse_Error( CONN_ID Idx, CHAR *Error )
+LOCAL BOOLEAN
+Validate_Prefix( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
 {
-	/* Fehler beim Parsen. Fehlermeldung an den Client schicken.
-	 * TRUE: Connection wurde durch diese Funktion nicht geschlossen,
-	 * FALSE: Connection wurde terminiert. */
-	
+	CLIENT *client, *c;
+
 	assert( Idx >= 0 );
-	assert( Error != NULL );
+	assert( Req != NULL );
 
-	Log( LOG_DEBUG, "Connection %d: Parse error: %s", Idx, Error );
-	return Conn_WriteStr( Idx, "ERROR :Parse error: %s", Error );
-} /* Parse_Error */
+	*Closed = FALSE;
 
+	/* ist ueberhaupt ein Prefix vorhanden? */
+	if( ! Req->prefix ) return TRUE;
+
+	/* Client-Struktur der Connection ermitteln */
+	client = Client_GetFromConn( Idx );
+	assert( client != NULL );
+
+	/* nur validieren, wenn bereits registrierte Verbindung */
+	if(( Client_Type( client ) != CLIENT_USER ) && ( Client_Type( client ) != CLIENT_SERVER ) && ( Client_Type( client ) != CLIENT_SERVICE ))
+	{
+		/* noch nicht registrierte Verbindung.
+		 * Das Prefix wird ignoriert. */
+		Req->prefix = NULL;
+		return TRUE;
+	}
+
+	/* pruefen, ob der im Prefix angegebene Client bekannt ist */
+	c = Client_Search( Req->prefix );
+	if( ! c )
+	{
+		/* im Prefix angegebener Client ist nicht bekannt */
+		Log( LOG_ERR, "Invalid prefix, client not known (connection %d)!?", Idx );
+		if( ! Conn_WriteStr( Idx, "ERROR :Invalid prefix, client not known!?" )) *Closed = TRUE;
+		return FALSE;
+	}
+
+	/* pruefen, ob der Client mit dem angegebenen Prefix in Richtung
+	 * des Senders liegt, d.h. sicherstellen, dass das Prefix nicht
+	 * gefaelscht ist */
+	if( Client_NextHop( c ) != client )
+	{
+		/* das angegebene Prefix ist aus dieser Richtung, also
+		 * aus der gegebenen Connection, ungueltig! */
+		Log( LOG_ERR, "Spoofed prefix \"%s\" from \"%s\" (connection %d)!", Req->prefix, Client_Mask( Client_GetFromConn( Idx )), Idx );
+		Conn_Close( Idx, NULL, "Spoofed prefix", TRUE );
+		*Closed = TRUE;
+		return FALSE;
+	}
 
-LOCAL BOOLEAN Validate_Prefix( REQUEST *Req )
-{
-	assert( Req != NULL );
 	return TRUE;
 } /* Validate_Prefix */
 
 
-LOCAL BOOLEAN Validate_Command( REQUEST *Req )
+LOCAL BOOLEAN
+Validate_Command( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
 {
+	assert( Idx >= 0 );
 	assert( Req != NULL );
+	*Closed = FALSE;
+
 	return TRUE;
 } /* Validate_Comman */
 
 
-LOCAL BOOLEAN Validate_Args( REQUEST *Req )
+LOCAL BOOLEAN
+Validate_Args( CONN_ID Idx, REQUEST *Req, BOOLEAN *Closed )
 {
+	assert( Idx >= 0 );
 	assert( Req != NULL );
+	*Closed = FALSE;
+
 	return TRUE;
 } /* Validate_Args */
 
 
-LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req )
+LOCAL BOOLEAN
+Handle_Request( CONN_ID Idx, REQUEST *Req )
 {
 	/* Client-Request verarbeiten. Bei einem schwerwiegenden Fehler
 	 * wird die Verbindung geschlossen und FALSE geliefert. */
@@ -293,6 +345,13 @@ LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req )
 	else if( strcasecmp( Req->command, "TOPIC" ) == 0 ) return IRC_TOPIC( client, Req );
 	else if( strcasecmp( Req->command, "WHO" ) == 0 ) return IRC_WHO( client, Req );
 	else if( strcasecmp( Req->command, "LIST" ) == 0 ) return IRC_LIST( client, Req );
+	else if( strcasecmp( Req->command, "INVITE" ) == 0 ) return IRC_INVITE( client, Req );
+	else if( strcasecmp( Req->command, "KICK" ) == 0 ) return IRC_KICK( client, Req );
+	else if( strcasecmp( Req->command, "CONNECT" ) == 0 ) return IRC_CONNECT( client, Req );
+	else if( strcasecmp( Req->command, "ADMIN" ) == 0 ) return IRC_ADMIN( client, Req );
+#ifdef IRCPLUS
+	else if( strcasecmp( Req->command, "CHANINFO" ) == 0 ) return IRC_CHANINFO( client, Req );
+#endif
 	
 	/* Unbekannter Befehl */
 	if( Client_Type( client ) != CLIENT_SERVER ) IRC_WriteStrClient( client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( client ), Req->command );