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%{
/*
* configlexer.lex - lexical analyzer for NSD config file
*
* Copyright (c) 2001-2006, NLnet Labs. All rights reserved
*
* See LICENSE for the license.
*
*/
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <strings.h>
#include "options.h"
#include "configyyrename.h"
#include "configparser.h"
void c_error(const char *message);
#define YY_NO_UNPUT
#if 0
#define LEXOUT(s) printf s /* used ONLY when debugging */
#else
#define LEXOUT(s)
#endif
struct inc_state {
const char* filename;
int line;
};
static struct inc_state parse_stack[MAXINCLUDES];
static YY_BUFFER_STATE include_stack[MAXINCLUDES];
static int config_include_stack_ptr = 0;
static void config_start_include(const char* filename)
{
FILE *input;
if(strlen(filename) == 0) {
c_error_msg("empty include file name");
return;
}
if(config_include_stack_ptr >= MAXINCLUDES) {
c_error_msg("includes nested too deeply, skipped (>%d)", MAXINCLUDES);
return;
}
input = fopen(filename, "r");
if(!input) {
c_error_msg("cannot open include file '%s': %s",
filename, strerror(errno));
return;
}
LEXOUT(("switch_to_include_file(%s) ", filename));
parse_stack[config_include_stack_ptr].filename = cfg_parser->filename;
parse_stack[config_include_stack_ptr].line = cfg_parser->line;
include_stack[config_include_stack_ptr] = YY_CURRENT_BUFFER;
cfg_parser->filename = region_strdup(cfg_parser->opt->region, filename);
cfg_parser->line = 1;
yy_switch_to_buffer(yy_create_buffer(input, YY_BUF_SIZE));
++config_include_stack_ptr;
}
static void config_end_include(void)
{
--config_include_stack_ptr;
cfg_parser->filename = parse_stack[config_include_stack_ptr].filename;
cfg_parser->line = parse_stack[config_include_stack_ptr].line;
yy_delete_buffer(YY_CURRENT_BUFFER);
yy_switch_to_buffer(include_stack[config_include_stack_ptr]);
}
#ifndef yy_set_bol /* compat definition, for flex 2.4.6 */
#define yy_set_bol(at_bol) \
{ \
if ( ! yy_current_buffer ) \
yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
yy_current_buffer->yy_ch_buf[0] = ((at_bol)?'\n':' '); \
}
#endif
%}
SPACE [ \t]
LETTER [a-zA-Z]
UNQUOTEDLETTER [^\"\n\r \t\\]|\\.
NEWLINE [\r\n]
COMMENT \#
COLON \:
ANY [^\"\n\r\\]|\\.
%x quotedstring include include_quoted
%%
{SPACE}* { LEXOUT(("SP ")); /* ignore */ }
{SPACE}*{COMMENT}.* { LEXOUT(("comment(%s) ", yytext)); /* ignore */ }
server{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER;}
name{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NAME;}
ip-address{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_ADDRESS;}
debug-mode{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DEBUG_MODE;}
hide-version{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_HIDE_VERSION;}
ip4-only{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP4_ONLY;}
ip6-only{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP6_ONLY;}
database{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DATABASE;}
identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IDENTITY;}
logfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_LOGFILE;}
server-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_COUNT;}
tcp-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_COUNT;}
tcp-query-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_QUERY_COUNT;}
tcp-timeout{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_TIMEOUT;}
ipv4-edns-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IPV4_EDNS_SIZE;}
ipv6-edns-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IPV6_EDNS_SIZE;}
pidfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PIDFILE;}
port{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PORT;}
statistics{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_STATISTICS;}
chroot{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CHROOT;}
username{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_USERNAME;}
zonesdir{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONESDIR;}
difffile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DIFFFILE;}
xfrdfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRDFILE;}
xfrd-reload-timeout{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRD_RELOAD_TIMEOUT;}
verbosity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_VERBOSITY;}
zone{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONE;}
zonefile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILE;}
allow-notify{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALLOW_NOTIFY;}
request-xfr{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REQUEST_XFR;}
notify{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NOTIFY;}
notify-retry{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NOTIFY_RETRY;}
provide-xfr{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PROVIDE_XFR;}
outgoing-interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_OUTGOING_INTERFACE;}
allow-axfr-fallback{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALLOW_AXFR_FALLBACK;}
key{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_KEY;}
algorithm{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALGORITHM;}
secret{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SECRET;}
AXFR { LEXOUT(("v(%s) ", yytext)); return VAR_AXFR;}
UDP { LEXOUT(("v(%s) ", yytext)); return VAR_UDP;}
{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++;}
/* Quoted strings. Strip leading and ending quotes */
\" { BEGIN(quotedstring); LEXOUT(("QS ")); }
<quotedstring><<EOF>> {
yyerror("EOF inside quoted string");
BEGIN(INITIAL);
}
<quotedstring>{ANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); }
<quotedstring>\n { cfg_parser->line++; yymore(); }
<quotedstring>\" {
LEXOUT(("QE "));
BEGIN(INITIAL);
yytext[yyleng - 1] = '\0';
yylval.str = region_strdup(cfg_parser->opt->region, yytext);
return STRING;
}
/* include: directive */
include{COLON} { LEXOUT(("v(%s) ", yytext)); BEGIN(include); }
<include><<EOF>> {
yyerror("EOF inside include directive");
BEGIN(INITIAL);
}
<include>{SPACE}* { LEXOUT(("ISP ")); /* ignore */ }
<include>{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++;}
<include>\" { LEXOUT(("IQS ")); BEGIN(include_quoted); }
<include>{UNQUOTEDLETTER}* {
LEXOUT(("Iunquotedstr(%s) ", yytext));
config_start_include(yytext);
BEGIN(INITIAL);
}
<include_quoted><<EOF>> {
yyerror("EOF inside quoted string");
BEGIN(INITIAL);
}
<include_quoted>{ANY}* { LEXOUT(("ISTR(%s) ", yytext)); yymore(); }
<include_quoted>{NEWLINE} { cfg_parser->line++; yymore(); }
<include_quoted>\" {
LEXOUT(("IQE "));
yytext[yyleng - 1] = '\0';
config_start_include(yytext);
BEGIN(INITIAL);
}
<INITIAL><<EOF>> {
yy_set_bol(1); /* Set beginning of line, so "^" rules match. */
if (config_include_stack_ptr == 0) {
yyterminate();
} else {
fclose(yyin);
config_end_include();
}
}
{UNQUOTEDLETTER}* { LEXOUT(("unquotedstr(%s) ", yytext));
yylval.str = region_strdup(cfg_parser->opt->region, yytext); return STRING; }
%%
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