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- Modul zum Parsen von Client-Requests begonnen.
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src/ngircd/parse.c
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src/ngircd/parse.c
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/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001 by Alexander Barton (alex@barton.de)
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*
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* Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
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* der GNU General Public License (GPL), wie von der Free Software Foundation
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* herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
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* der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
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* Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
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* der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
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*
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* $Id: parse.c,v 1.1 2001/12/21 23:53:16 alex Exp $
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*
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* parse.c: Parsen der Client-Anfragen
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*
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* $Log: parse.c,v $
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* Revision 1.1 2001/12/21 23:53:16 alex
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* - Modul zum Parsen von Client-Requests begonnen.
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*
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*/
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#include <portab.h>
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#include "global.h"
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#include <imp.h>
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "conn.h"
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#include "log.h"
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#include <exp.h>
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#include "parse.h"
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LOCAL VOID Init_Request( REQUEST *Req );
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LOCAL BOOLEAN Parse_Error( CONN_ID Idx, CHAR *Error );
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LOCAL BOOLEAN Validate_Prefix( REQUEST *Req );
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LOCAL BOOLEAN Validate_Command( REQUEST *Req );
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LOCAL BOOLEAN Validate_Args( REQUEST *Req );
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LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req );
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GLOBAL VOID Parse_Init( VOID )
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{
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} /* Parse_Init */
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GLOBAL VOID Parse_Exit( VOID )
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{
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} /* Parse_Exit */
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GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request )
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{
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/* Client-Request parsen und verarbeiten. Bei einem schwerwiegenden
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* Fehler wird die Verbindung geschlossen und FALSE geliefert.
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* Der Aufbau gueltiger Requests ist in RFC 2812, 2.3 definiert. */
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REQUEST req;
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CHAR *start, *ptr;
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assert( Idx >= 0 );
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assert( Request != NULL );
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Init_Request( &req );
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/* gibt es ein Prefix? */
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if( Request[0] == ':' )
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{
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/* Prefix vorhanden */
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req.prefix = Request + 1;
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ptr = strchr( Request, ' ' );
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if( ! ptr ) return Parse_Error( Idx, "Invalid prefix (command missing!?)" );
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*ptr = '\0';
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start = ptr + 1;
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}
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else start = Request;
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if( ! Validate_Prefix( &req )) return Parse_Error( Idx, "Invalid prefix");
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/* Befehl */
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ptr = strchr( start, ' ' );
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if( ptr ) *ptr = '\0';
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req.command = start;
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if( ! Validate_Command( &req )) return Parse_Error( Idx, "Invalid command" );
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/* Argumente, Parameter */
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if( ptr )
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{
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/* Prinzipiell gibt es welche :-) */
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start = ptr + 1;
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while( start )
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{
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/* Parameter-String "zerlegen" */
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ptr = strchr( start, ' ' );
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if( ptr ) *ptr = '\0';
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if( start[0] == ':' ) req.argv[req.argc] = start + 1;
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else req.argv[req.argc] = start;
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req.argc++;
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if( start[0] == ':' ) break;
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if( req.argc > 14 ) break;
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if( ptr ) start = ptr + 1;
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else start = NULL;
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}
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}
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if( ! Validate_Args( &req )) return Parse_Error( Idx, "Invalid argument(s)" );
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return Handle_Request( Idx, &req );
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} /* Parse_Request */
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LOCAL VOID Init_Request( REQUEST *Req )
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{
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/* Neue Request-Struktur initialisieren */
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INT i;
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assert( Req != NULL );
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Req->prefix = NULL;
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Req->command = NULL;
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for( i = 0; i < 15; Req->argv[i++] = NULL );
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Req->argc = 0;
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} /* Init_Request */
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LOCAL BOOLEAN Parse_Error( CONN_ID Idx, CHAR *Error )
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{
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/* Fehler beim Parsen. Fehlermeldung an den Client schicken.
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* TRUE: Connection wurde durch diese Funktion nicht geschlossen,
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* FALSE: Connection wurde terminiert. */
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CHAR msg[256];
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assert( Idx >= 0 );
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assert( Error != NULL );
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sprintf( msg, "Parse error: %s!", Error );
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return Conn_WriteStr( Idx, msg );
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} /* Parse_Error */
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LOCAL BOOLEAN Validate_Prefix( REQUEST *Req )
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{
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assert( Req != NULL );
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return TRUE;
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} /* Validate_Prefix */
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LOCAL BOOLEAN Validate_Command( REQUEST *Req )
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{
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assert( Req != NULL );
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return TRUE;
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} /* Validate_Comman */
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LOCAL BOOLEAN Validate_Args( REQUEST *Req )
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{
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assert( Req != NULL );
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return TRUE;
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} /* Validate_Args */
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LOCAL BOOLEAN Handle_Request( CONN_ID Idx, REQUEST *Req )
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{
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assert( Idx >= 0 );
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assert( Req != NULL );
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assert( Req->command != NULL );
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#ifdef DEBUG
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Log( LOG_DEBUG, " -> connection %d: '%s', %d %s,%s prefix.", Idx, Req->command, Req->argc, Req->argc == 1 ? "parameter" : "parameters", Req->prefix ? "" : " no" );
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#endif
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return TRUE;
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} /* Handle_Request */
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/* -eof- */
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47
src/ngircd/parse.h
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47
src/ngircd/parse.h
Normal file
@ -0,0 +1,47 @@
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/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001 by Alexander Barton (alex@barton.de)
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*
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* Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen
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* der GNU General Public License (GPL), wie von der Free Software Foundation
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* herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2
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* der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version.
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* Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
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* der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
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*
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* $Id: parse.h,v 1.1 2001/12/21 23:53:16 alex Exp $
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*
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* parse.h: Parsen der Client-Anfragen (Header)
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*
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* $Log: parse.h,v $
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* Revision 1.1 2001/12/21 23:53:16 alex
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* - Modul zum Parsen von Client-Requests begonnen.
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*
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*/
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#ifndef __parse_h__
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#define __parse_h__
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#include "conn.h"
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typedef struct _REQUEST /* vgl. RFC 2812, 2.3 */
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{
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CHAR *prefix; /* Prefix */
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CHAR *command; /* IRC-Befehl */
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CHAR *argv[15]; /* Parameter (max. 15: 0..14) */
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INT argc; /* Anzahl vorhandener Parameter */
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} REQUEST;
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GLOBAL VOID Parse_Init( VOID );
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GLOBAL VOID Parse_Exit( VOID );
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GLOBAL BOOLEAN Parse_Request( CONN_ID Idx, CHAR *Request );
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#endif
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/* -eof- */
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