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|
/* parser for iptables-save format
*
* Copyright (c) 2003 Jamie Wilkinson <jaq@spacepants.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
%{
#include <stdio.h>
#include <stdlib.h>
#include "ast.h"
#define YYPARSE_PARAM parm
void yyerror(const char *);
extern int yylex(void);
#define YYPRINT(f, t, v) yyprint(f, t, v)
%}
%debug
%union {
struct rule_list_s * u_rule_list;
struct rule_s * u_rule;
struct option_list_s * u_option_list;
struct not_option_s * u_not_option;
struct option_s * u_option;
struct not_identifier_s * u_not_identifier;
struct identifier_s * u_identifier;
struct pkt_count_s * u_pkt_count;
char * u_str;
}
%type <u_rule_list> rule_list
%type <u_rule> rule
%type <u_option_list> option_list
%type <u_not_option> not_option
%type <u_option> option
%type <u_not_identifier> not_identifier
%type <u_identifier> identifier
%type <u_pkt_count> pkt_count
%defines
%token TOK_TABLE
%token TOK_CHAIN
%token <u_str> TOK_OPTION
%token <u_str> TOK_IDENTIFIER
%token TOK_LSQUARE
%token TOK_RSQUARE
%token TOK_COLON
%token TOK_BANG
%token TOK_QUOTE
%token TOK_COMMIT
%token TOK_NEWLINE
%{
int yyprint(FILE * f, int t, YYSTYPE v);
%}
%start ast
%%
ast: rule_list
{
/* we expect parm to be already allocated, and that
* it is of type (struct ast_s *) */
((struct ast_s *) parm)->list = $1;
}
rule_list: /* empty */
{
$$ = NULL;
}
| rule_list rule TOK_NEWLINE
{
$$ = malloc(sizeof(struct rule_list_s));
$$->list = $1;
$$->rule = $2;
}
rule: TOK_TABLE TOK_IDENTIFIER
{
$$ = malloc(sizeof(struct rule_s));
$$->table = $2;
$$->chain = NULL;
$$->policy = NULL;
$$->pkt_count = NULL;
$$->option_list = NULL;
}
| TOK_CHAIN TOK_IDENTIFIER TOK_IDENTIFIER pkt_count
{
$$ = malloc(sizeof(struct rule_s));
$$->table = NULL;
$$->chain = $2;
$$->policy = $3;
$$->pkt_count = $4;
$$->option_list = NULL;
}
| TOK_COMMIT
{
$$ = NULL;
}
| pkt_count option_list
{
$$ = malloc(sizeof(struct rule_s));
$$->table = NULL;
$$->chain = NULL;
$$->policy = NULL;
$$->pkt_count = $1;
$$->option_list = $2;
}
| option_list
{
$$ = malloc(sizeof(struct rule_s));
$$->table = NULL;
$$->chain = NULL;
$$->policy = NULL;
$$->pkt_count = NULL;
$$->option_list = $1;
}
option_list: /* empty */
{
$$ = NULL;
}
| option_list not_option
{
$$ = malloc(sizeof(struct option_list_s));
$$->option_list = $1;
$$->not_option = $2;
}
not_option: TOK_BANG option
{
$$ = malloc(sizeof(struct not_option_s));
$$->neg = 1;
$$->option = $2;
}
| option
{
$$ = malloc(sizeof(struct not_option_s));
$$->neg = 0;
$$->option = $1;
}
option: TOK_OPTION not_identifier
{
$$ = malloc(sizeof(struct option_s));
$$->option = $1;
$$->not_identifier = $2;
}
not_identifier: TOK_BANG identifier
{
$$ = malloc(sizeof(struct not_identifier_s));
$$->neg = 1;
$$->identifier = $2;
}
| identifier
{
$$ = malloc(sizeof(struct not_identifier_s));
$$->neg = 0;
$$->identifier = $1;
}
identifier: TOK_IDENTIFIER TOK_IDENTIFIER
{
$$ = malloc(sizeof(struct identifier_s));
$$->id = $1;
}
| TOK_IDENTIFIER TOK_COLON TOK_IDENTIFIER
{
$$ = malloc(sizeof(struct identifier_s));
asprintf(&($$->id), "%s:%s", $1, $3);
}
| TOK_QUOTE TOK_IDENTIFIER TOK_QUOTE
{
$$ = malloc(sizeof(struct identifier_s));
$$->id = $2;
}
| TOK_IDENTIFIER
{
$$ = malloc(sizeof(struct identifier_s));
$$->id = $1;
}
pkt_count: TOK_LSQUARE TOK_IDENTIFIER TOK_COLON TOK_IDENTIFIER TOK_RSQUARE
{
$$ = malloc(sizeof(struct pkt_count_s));
$$->in = $2;
$$->out = $4;
}
%%
char * filename();
long int lineno();
extern char * yytext;
void yyerror(const char * s) {
fprintf(stderr, "%s:%ld: %s\n", filename(), lineno(), s);
}
int yyprint(FILE * f, int type, YYSTYPE v) {
fprintf(f, "type=%d,spelling=\"%s\",loc=%p", type, yytext, &v);
return 0;
}
|
