X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fparse.c;h=453275377175f0e1b86809fa8007c42bd0f3fc55;hp=cd3d95d4bdfc5bf8509037a225527f204fc73514;hb=fa3dbfd8d685a96031c5813128fa1453095ef413;hpb=76c4f06680d6c74f527f33508f307d27f3bfb62d

diff --git a/src/ngircd/parse.c b/src/ngircd/parse.c
index cd3d95d4..45327537 100644
--- a/src/ngircd/parse.c
+++ b/src/ngircd/parse.c
@@ -1,69 +1,64 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
  *
  * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
  * der GNU General Public License (GPL), wie von der Free Software Foundation
  * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
  * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
  * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
- * der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
+ * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS.
  *
- * $Id: parse.c,v 1.2 2001/12/23 21:56:47 alex Exp $
+ * $Id: parse.c,v 1.45 2002/11/22 23:33:00 alex Exp $
  *
  * parse.c: Parsen der Client-Anfragen
- *
- * $Log: parse.c,v $
- * Revision 1.2  2001/12/23 21:56:47  alex
- * - bessere Debug-Ausgaben,
- * - Bug im Parameter-Parser behoben (bei "langem" Parameter)
- * - erste IRC-Befehle werden erkannt :-)
- *
- * Revision 1.1  2001/12/21 23:53:16  alex
- * - Modul zum Parsen von Client-Requests begonnen.
  */
 
 
-#include <portab.h>
-#include "global.h"
+#include "portab.h"
 
-#include <imp.h>
+#include "imp.h"
 #include <assert.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
-#include "client.h"
+#include "ngircd.h"
+#include "defines.h"
 #include "conn.h"
-#include "irc.h"
+#include "client.h"
+#include "channel.h"
 #include "log.h"
 #include "messages.h"
+#include "tool.h"
 
-#include <exp.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"
 
-LOCAL VOID Init_Request( REQUEST *Req );
-
-LOCAL BOOLEAN Parse_Error( CONN_ID Idx, CHAR *Error );
+#include "exp.h"
 
-LOCAL BOOLEAN Validate_Prefix( REQUEST *Req );
-LOCAL BOOLEAN Validate_Command( REQUEST *Req );
-LOCAL BOOLEAN Validate_Args( REQUEST *Req );
 
-LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req );
+LOCAL VOID Init_Request PARAMS(( REQUEST *Req ));
 
+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 ));
 
-GLOBAL VOID Parse_Init( VOID )
-{
-} /* Parse_Init */
+LOCAL BOOLEAN Handle_Request PARAMS(( CONN_ID Idx, REQUEST *Req ));
 
 
-GLOBAL VOID Parse_Exit( VOID )
-{
-} /* Parse_Exit */
-
-
-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.
@@ -71,36 +66,57 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 
 	REQUEST req;
 	CHAR *start, *ptr;
+	BOOLEAN closed;
 
 	assert( Idx >= 0 );
 	assert( Request != NULL );
 
-#ifdef DEBUG
-	Log( LOG_DEBUG, " <- connection %d: '%s'.", Idx, Request );
+#ifdef SNIFFER
+	if( NGIRCd_Sniffer ) Log( LOG_DEBUG, " <- connection %d: '%s'.", Idx, Request );
 #endif
-	
+
 	Init_Request( &req );
 
+	/* Fuehrendes und folgendes "Geraffel" verwerfen */
+	ngt_TrimStr( Request );
+
 	/* gibt es ein Prefix? */
 	if( Request[0] == ':' )
 	{
 		/* Prefix vorhanden */
 		req.prefix = Request + 1;
 		ptr = strchr( Request, ' ' );
-		if( ! ptr ) return Parse_Error( Idx, "Invalid prefix (command missing!?)" );
+		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
+		 * Prefix und Befehl ignorieren */
+		while( *(ptr + 1) == ' ' ) ptr++;
+#endif
 		start = ptr + 1;
 	}
 	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, ' ' );
-	if( ptr ) *ptr = '\0';
+	if( ptr )
+	{
+		*ptr = '\0';
+#ifndef STRICT_RFC
+		/* multiple Leerzeichen als Trenner vor
+		*Parametertrennern ignorieren */
+		while( *(ptr + 1) == ' ' ) ptr++;
+#endif
+	}
 	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 )
@@ -119,31 +135,40 @@ GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
 			{
 				req.argv[req.argc] = start;
 				ptr = strchr( start, ' ' );
-				if( ptr ) *ptr = '\0';
+				if( ptr )
+				{
+					*ptr = '\0';
+#ifndef STRICT_RFC
+					/* multiple Leerzeichen als
+					 * Parametertrenner ignorieren */
+					while( *(ptr + 1) == ' ' ) ptr++;
+#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;
@@ -153,67 +178,186 @@ 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. */
-	
-	CHAR msg[256];
-	
+	CLIENT *client, *c;
+
 	assert( Idx >= 0 );
-	assert( Error != NULL );
+	assert( Req != NULL );
 
-	sprintf( msg, "Parse error: %s!", Error );
-	return Conn_WriteStr( Idx, msg );
-} /* 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 \"%s\", client not known (connection %d)!?", Req->prefix, Idx );
+		if( ! Conn_WriteStr( Idx, "ERROR :Invalid prefix \"%s\", client not known!?", Req->prefix )) *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. */
 
-	CLIENT *client;
+	CLIENT *client, *target, *prefix;
+	CHAR str[LINE_LEN];
+	INT i;
 
 	assert( Idx >= 0 );
 	assert( Req != NULL );
 	assert( Req->command != NULL );
 
-#ifdef DEBUG
-	Log( LOG_DEBUG, "    connection %d: '%s', %d %s,%s prefix.", Idx, Req->command, Req->argc, Req->argc == 1 ? "parameter" : "parameters", Req->prefix ? "" : " no" );
-#endif
-
 	client = Client_GetFromConn( Idx );
 	assert( client != NULL );
 
-	if( strcmp( Req->command, "PASS" ) == 0 ) return IRC_PASS( client, Req );
-	else if( strcmp( Req->command, "NICK" ) == 0 ) return IRC_NICK( client, Req );
-	else if( strcmp( Req->command, "USER" ) == 0 ) return IRC_USER( client, Req );
+	/* Statuscode, der geforwarded werden muss? */
+	if(( strlen( Req->command ) == 3 ) && ( atoi( Req->command ) > 100 ))
+	{
+		/* Befehl ist ein Statuscode */
+
+		/* Zielserver ermitteln */
+		if(( Client_Type( client ) == CLIENT_SERVER ) && ( Req->argc > 0 )) target = Client_Search( Req->argv[0] );
+		else target = NULL;
+		if( ! target )
+		{
+			if( Req->argc > 0 ) Log( LOG_WARNING, "Unknown target for status code %s: \"%s\"", Req->command, Req->argv[0] );
+			else Log( LOG_WARNING, "Unknown target for status code %s!", Req->command );
+			return TRUE;
+		}
+		if( target == Client_ThisServer( ))
+		{
+			Log( LOG_DEBUG, "Ignored status code %s from \"%s\".", Req->command, Client_ID( client ));
+			return TRUE;
+		}
+
+		/* Quell-Client ermitteln */
+		if( ! Req->prefix[0] )
+		{
+			Log( LOG_WARNING, "Got status code without prefix!?" );
+			return TRUE;
+		}
+		else prefix = Client_Search( Req->prefix );
+		if( ! prefix )
+		{
+			Log( LOG_WARNING, "Got status code from unknown source: \"%s\"", Req->prefix );
+			return TRUE;
+		}
+
+		/* Statuscode weiterleiten */
+		strcpy( str, Req->command );
+		for( i = 0; i < Req->argc; i++ )
+		{
+			if( i < Req->argc - 1 ) strcat( str, " " );
+			else strcat( str, " :" );
+			strcat( str, Req->argv[i] );
+		}
+		return IRC_WriteStrClientPrefix( target, prefix, "%s", str );
+	}
 
+	if( strcasecmp( Req->command, "ADMIN" ) == 0 ) return IRC_ADMIN( client, Req );
+	else if( strcasecmp( Req->command, "AWAY" ) == 0 ) return IRC_AWAY( client, Req );
+	else if( strcasecmp( Req->command, "CONNECT" ) == 0 ) return IRC_CONNECT( client, Req );
+	else if( strcasecmp( Req->command, "DIE" ) == 0 ) return IRC_DIE( client, Req );
+	else if( strcasecmp( Req->command, "ERROR" ) == 0 ) return IRC_ERROR( client, Req );
+	else if( strcasecmp( Req->command, "INVITE" ) == 0 ) return IRC_INVITE( client, Req );
+	else if( strcasecmp( Req->command, "ISON" ) == 0 ) return IRC_ISON( client, Req );
+	else if( strcasecmp( Req->command, "JOIN" ) == 0 ) return IRC_JOIN( client, Req );
+	else if( strcasecmp( Req->command, "KICK" ) == 0 ) return IRC_KICK( client, Req );
+	else if( strcasecmp( Req->command, "KILL" ) == 0 ) return IRC_KILL( client, Req );
+	else if( strcasecmp( Req->command, "LINKS" ) == 0 ) return IRC_LINKS( client, Req );
+	else if( strcasecmp( Req->command, "LIST" ) == 0 ) return IRC_LIST( client, Req );
+	else if( strcasecmp( Req->command, "LUSERS" ) == 0 ) return IRC_LUSERS( client, Req );
+	else if( strcasecmp( Req->command, "MODE" ) == 0 ) return IRC_MODE( client, Req );
+	else if( strcasecmp( Req->command, "MOTD" ) == 0 ) return IRC_MOTD( client, Req );
+	else if( strcasecmp( Req->command, "NAMES" ) == 0 ) return IRC_NAMES( client, Req );
+	else if( strcasecmp( Req->command, "NICK" ) == 0 ) return IRC_NICK( client, Req );
+	else if( strcasecmp( Req->command, "NJOIN" ) == 0 ) return IRC_NJOIN( client, Req );
+	else if( strcasecmp( Req->command, "NOTICE" ) == 0 ) return IRC_NOTICE( client, Req );
+	else if( strcasecmp( Req->command, "OPER" ) == 0 ) return IRC_OPER( client, Req );
+	else if( strcasecmp( Req->command, "PART" ) == 0 ) return IRC_PART( client, Req );
+	else if( strcasecmp( Req->command, "PASS" ) == 0 ) return IRC_PASS( client, Req );
+	else if( strcasecmp( Req->command, "PING" ) == 0 ) return IRC_PING( client, Req );
+	else if( strcasecmp( Req->command, "PONG" ) == 0 ) return IRC_PONG( client, Req );
+	else if( strcasecmp( Req->command, "PRIVMSG" ) == 0 ) return IRC_PRIVMSG( client, Req );
+	else if( strcasecmp( Req->command, "QUIT" ) == 0 ) return IRC_QUIT( client, Req );
+	else if( strcasecmp( Req->command, "REHASH" ) == 0 ) return IRC_REHASH( client, Req );
+	else if( strcasecmp( Req->command, "RESTART" ) == 0 ) return IRC_RESTART( client, Req );
+	else if( strcasecmp( Req->command, "SERVER" ) == 0 ) return IRC_SERVER( client, Req );
+	else if( strcasecmp( Req->command, "SQUIT" ) == 0 ) return IRC_SQUIT( client, Req );
+	else if( strcasecmp( Req->command, "TOPIC" ) == 0 ) return IRC_TOPIC( client, Req );
+	else if( strcasecmp( Req->command, "USER" ) == 0 ) return IRC_USER( client, Req );
+	else if( strcasecmp( Req->command, "USERHOST" ) == 0 ) return IRC_USERHOST( client, Req );
+	else if( strcasecmp( Req->command, "VERSION" ) == 0 ) return IRC_VERSION( client, Req );
+	else if( strcasecmp( Req->command, "WHO" ) == 0 ) return IRC_WHO( client, Req );
+	else if( strcasecmp( Req->command, "WHOIS" ) == 0 ) return IRC_WHOIS( client, Req );
+	else if( strcasecmp( Req->command, "WHOWAS" ) == 0 ) return IRC_WHOWAS( client, Req );
+#ifdef IRCPLUS
+	else if( strcasecmp( Req->command, "CHANINFO" ) == 0 ) return IRC_CHANINFO( client, Req );
+#endif
+	
 	/* Unbekannter Befehl */
-	Conn_WriteStr( Idx, ERR_UNKNOWNCOMMAND_MSG, Req->command );
+	if( Client_Type( client ) != CLIENT_SERVER ) IRC_WriteStrClient( client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( client ), Req->command );
+	Log( LOG_DEBUG, "Connection %d: Unknown command \"%s\", %d %s,%s prefix.", Client_Conn( client ), Req->command, Req->argc, Req->argc == 1 ? "parameter" : "parameters", Req->prefix ? "" : " no" );
 
 	return TRUE;
 } /* Handle_Request */