unbound/util/configparser.y

/*
 * configparser.y -- yacc grammar for unbound configuration files
 *
 * Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
 *
 * Copyright (c) 2007, NLnet Labs. All rights reserved.
 * 
 * This software is open source.
 * 
 * Redistribution and use 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 NLNET LABS nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * 
 * 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 REGENTS 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
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR 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.
 */

%{
#include "config.h"

#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>

#include "util/configyyrename.h"
#include "util/config_file.h"

int ub_c_lex(void);
void ub_c_error(const char *message);

/* these need to be global, otherwise they cannot be used inside yacc */
extern struct config_parser_state* cfg_parser;
static int server_settings_seen = 0;

#if 0
#define OUTYY(s)  printf s /* used ONLY when debugging */
#else
#define OUTYY(s)
#endif

%}
%union {
	char*	str;
}

%token SPACE LETTER NEWLINE COMMENT COLON ANY ZONESTR
%token <str> STRING
%token VAR_SERVER VAR_VERBOSITY VAR_NUM_THREADS VAR_PORT
%token VAR_OUTGOING_PORT VAR_OUTGOING_RANGE
%token VAR_DO_IP4 VAR_DO_IP6 VAR_DO_UDP VAR_DO_TCP
%token VAR_FORWARD_TO VAR_FORWARD_TO_PORT


%%
toplevelvars: /* empty */ | toplevelvars toplevelvar ;
toplevelvar: serverstart contents_server ;

/* server: declaration */
serverstart: VAR_SERVER
	{ OUTYY(("\nP(server:)\n")); 
		if(server_settings_seen) {
			yyerror("duplicate server: element.");
		}
		server_settings_seen = 1;
	}
	;
contents_server: contents_server content_server | ;
content_server: server_num_threads | server_verbosity | server_port |
	server_outgoing_port | server_outgoing_range | server_do_ip4 |
	server_do_ip6 | server_do_udp | server_do_tcp | server_forward_to |
	server_forward_to_port;
server_num_threads: VAR_NUM_THREADS STRING 
	{ 
		OUTYY(("P(server_num_threads:%s)\n", $2)); 
		if(atoi($2) == 0 && strcmp($2, "0") != 0)
			yyerror("number expected");
		else cfg_parser->cfg->num_threads = atoi($2);
		free($2);
	}
	;
server_verbosity: VAR_VERBOSITY STRING 
	{ 
		OUTYY(("P(server_verbosity:%s)\n", $2)); 
		if(atoi($2) == 0 && strcmp($2, "0") != 0)
			yyerror("number expected");
		else cfg_parser->cfg->verbosity = atoi($2);
		free($2);
	}
	;
server_port: VAR_PORT STRING
	{
		OUTYY(("P(server_port:%s)\n", $2));
		if(atoi($2) == 0)
			yyerror("port number expected");
		else cfg_parser->cfg->port = atoi($2);
		free($2);
	}
	;
server_outgoing_port: VAR_OUTGOING_PORT STRING
	{
		OUTYY(("P(server_outgoing_port:%s)\n", $2));
		if(atoi($2) == 0)
			yyerror("port number expected");
		else cfg_parser->cfg->outgoing_base_port = atoi($2);
		free($2);
	}
	;
server_outgoing_range: VAR_OUTGOING_RANGE STRING
	{
		OUTYY(("P(server_outgoing_range:%s)\n", $2));
		if(atoi($2) == 0)
			yyerror("number expected");
		else cfg_parser->cfg->outgoing_num_ports = atoi($2);
		free($2);
	}
	;
server_do_ip4: VAR_DO_IP4 STRING
	{
		OUTYY(("P(server_do_ip4:%s)\n", $2));
		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
			yyerror("expected yes or no.");
		else cfg_parser->cfg->do_ip4 = (strcmp($2, "yes")==0);
		free($2);
	}
	;
server_do_ip6: VAR_DO_IP6 STRING
	{
		OUTYY(("P(server_do_ip6:%s)\n", $2));
		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
			yyerror("expected yes or no.");
		else cfg_parser->cfg->do_ip6 = (strcmp($2, "yes")==0);
		free($2);
	}
	;
server_do_udp: VAR_DO_UDP STRING
	{
		OUTYY(("P(server_do_udp:%s)\n", $2));
		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
			yyerror("expected yes or no.");
		else cfg_parser->cfg->do_udp = (strcmp($2, "yes")==0);
		free($2);
	}
	;
server_do_tcp: VAR_DO_TCP STRING
	{
		OUTYY(("P(server_do_tcp:%s)\n", $2));
		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
			yyerror("expected yes or no.");
		else cfg_parser->cfg->do_tcp = (strcmp($2, "yes")==0);
		free($2);
	}
	;
server_forward_to: VAR_FORWARD_TO STRING
	{
		OUTYY(("P(server_forward_to:%s)\n", $2));
		free(cfg_parser->cfg->fwd_address);
		cfg_parser->cfg->fwd_address = $2;
	}
	;
server_forward_to_port: VAR_FORWARD_TO_PORT STRING
	{
		OUTYY(("P(server_forward_to_port:%s)\n", $2));
		if(atoi($2) == 0)
			yyerror("number expected");
		else cfg_parser->cfg->fwd_port = atoi($2);
		free($2);
	}
	;
%%

/* parse helper routines could be here */