blob: 4ace8e57c2765a82ddbcc88ca45c89637fad8c9b [file] [log] [blame]
/*********************************************************************************************************
* Software License Agreement (BSD License) *
* Author: Sebastien Decugis <sdecugis@freediameter.net> *
* *
* Copyright (c) 2013, WIDE Project and NICT *
* All rights reserved. *
* *
* Redistribution and use of this software in source and binary forms, with or without modification, are *
* permitted provided that the following conditions are met: *
* *
* * Redistributions of source code must retain the above *
* copyright notice, this list of conditions and the *
* following disclaimer. *
* *
* * Redistributions in binary form must reproduce the above *
* copyright notice, this list of conditions and the *
* following disclaimer in the documentation and/or other *
* materials provided with the distribution. *
* *
* * Neither the name of the WIDE Project or NICT nor the *
* names of its contributors may be used to endorse or *
* promote products derived from this software without *
* specific prior written permission of WIDE Project and *
* NICT. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
*********************************************************************************************************/
/* Yacc extension's configuration parser.
* See doc/acl_wl.conf.sample for configuration file format
*/
/* For development only : */
%debug
%error-verbose
/* The parser receives the configuration file filename as parameter */
%parse-param {char * conffile}
/* Keep track of location */
%locations
%pure-parser
%{
#include "acl_wl.h"
#include "aw_conf.tab.h" /* bison is not smart enough to define the YYLTYPE before including this code, so... */
#include <string.h>
#include <errno.h>
/* Forward declaration */
int yyparse(char * conffile);
static int fqdn_added = 0;
/* Parse the configuration file */
int aw_conf_handle(char * conffile)
{
extern FILE * aw_confin;
int ret;
TRACE_ENTRY("%p", conffile);
TRACE_DEBUG (FULL, "Parsing configuration file: %s...", conffile);
aw_confin = fopen(conffile, "r");
if (aw_confin == NULL) {
ret = errno;
fd_log_debug("Unable to open extension configuration file %s for reading: %s", conffile, strerror(ret));
TRACE_DEBUG (INFO, "Error occurred, message logged -- configuration file.");
return ret;
}
ret = yyparse(conffile);
fclose(aw_confin);
if (ret != 0) {
TRACE_DEBUG (INFO, "Unable to parse the configuration file.");
return EINVAL;
} else {
TRACE_DEBUG(FULL, "Read %d FQDN entries successfully.", fqdn_added);
}
return 0;
}
/* The Lex parser prototype */
int aw_conflex(YYSTYPE *lvalp, YYLTYPE *llocp);
/* Function to report the errors */
void yyerror (YYLTYPE *ploc, char * conffile, char const *s)
{
TRACE_DEBUG(INFO, "Error in configuration parsing");
if (ploc->first_line != ploc->last_line)
fd_log_debug("%s:%d.%d-%d.%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_line, ploc->last_column, s);
else if (ploc->first_column != ploc->last_column)
fd_log_debug("%s:%d.%d-%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_column, s);
else
fd_log_debug("%s:%d.%d : %s", conffile, ploc->first_line, ploc->first_column, s);
}
%}
/* Values returned by lex for token */
%union {
char *string;
}
/* In case of error in the lexical analysis */
%token LEX_ERROR
/* Key words */
%token <string> FQDN
/* -------------------------------------- */
%%
/* The grammar definition */
conffile: /* empty grammar is OK */
| conffile FQDN
{
fqdn_added++;
TRACE_DEBUG(FULL, "Added FQDN: %s", $2);
}
| conffile LEX_ERROR
{
yyerror(&yylloc, conffile, "An error occurred while parsing the configuration file");
return EINVAL;
}
;