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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>
#ifdef HAVE_GLOB_H
# include <glob.h>
#endif
#include "options.h"
#include "configyyrename.h"
#include "configparser.h"
void c_error(const char *message);
#if 0
#define LEXOUT(s) printf s /* used ONLY when debugging */
#else
#define LEXOUT(s)
#endif
struct inc_state {
char* filename;
int line;
YY_BUFFER_STATE buffer;
struct inc_state* next;
};
static struct inc_state* config_include_stack = NULL;
static int inc_depth = 0;
static int inc_prev = 0;
static int num_args = 0;
void init_cfg_parse(void)
{
config_include_stack = NULL;
inc_depth = 0;
inc_prev = 0;
num_args = 0;
}
static void config_start_include(const char* filename)
{
FILE *input;
struct inc_state* s;
char* nm;
if(inc_depth++ > 10000000) {
c_error_msg("too many include files");
return;
}
if(strlen(filename) == 0) {
c_error_msg("empty include file name");
return;
}
s = (struct inc_state*)malloc(sizeof(*s));
if(!s) {
c_error_msg("include %s: malloc failure", filename);
return;
}
if (cfg_parser->chroot) {
int l = strlen(cfg_parser->chroot); /* chroot has trailing slash */
if (strncmp(cfg_parser->chroot, filename, l) != 0) {
c_error_msg("include file '%s' is not relative to chroot '%s'",
filename, cfg_parser->chroot);
return;
}
filename += l - 1; /* strip chroot without trailing slash */
}
nm = strdup(filename);
if(!nm) {
c_error_msg("include %s: strdup failure", filename);
free(s);
return;
}
input = fopen(filename, "r");
if(!input) {
c_error_msg("cannot open include file '%s': %s",
filename, strerror(errno));
free(s);
free(nm);
return;
}
LEXOUT(("switch_to_include_file(%s) ", filename));
s->filename = cfg_parser->filename;
s->line = cfg_parser->line;
s->buffer = YY_CURRENT_BUFFER;
s->next = config_include_stack;
config_include_stack = s;
cfg_parser->filename = nm;
cfg_parser->line = 1;
yy_switch_to_buffer(yy_create_buffer(input, YY_BUF_SIZE));
}
static void config_start_include_glob(const char* filename)
{
/* check for wildcards */
#ifdef HAVE_GLOB
glob_t g;
size_t i;
int r, flags;
if(!(!strchr(filename, '*') && !strchr(filename, '?') &&
!strchr(filename, '[') && !strchr(filename, '{') &&
!strchr(filename, '~'))) {
flags = 0
#ifdef GLOB_ERR
| GLOB_ERR
#endif
#ifdef GLOB_NOSORT
| GLOB_NOSORT
#endif
#ifdef GLOB_BRACE
| GLOB_BRACE
#endif
#ifdef GLOB_TILDE
| GLOB_TILDE
#endif
;
memset(&g, 0, sizeof(g));
r = glob(filename, flags, NULL, &g);
if(r) {
/* some error */
globfree(&g);
if(r == GLOB_NOMATCH)
return; /* no matches for pattern */
config_start_include(filename); /* let original deal with it */
return;
}
/* process files found, if any */
for(i=0; i<(size_t)g.gl_pathc; i++) {
config_start_include(g.gl_pathv[i]);
}
globfree(&g);
return;
}
#endif /* HAVE_GLOB */
config_start_include(filename);
}
static void config_end_include(void)
{
struct inc_state* s = config_include_stack;
--inc_depth;
if(!s) return;
free(cfg_parser->filename);
cfg_parser->filename = s->filename;
cfg_parser->line = s->line;
yy_delete_buffer(YY_CURRENT_BUFFER);
yy_switch_to_buffer(s->buffer);
config_include_stack = s->next;
free(s);
}
#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
%}
%option noinput
%option nounput
%{
#ifndef YY_NO_UNPUT
#define YY_NO_UNPUT 1
#endif
#ifndef YY_NO_INPUT
#define YY_NO_INPUT 1
#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;}
interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_ADDRESS;}
ip-transparent{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_TRANSPARENT;}
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;}
do-ip4{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DO_IP4;}
do-ip6{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DO_IP6;}
database{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DATABASE;}
identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IDENTITY;}
nsid{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NSID;}
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;}
zonelistfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONELISTFILE;}
difffile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DIFFFILE;}
xfrdfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRDFILE;}
xfrdir{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRDIR;}
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;}
zonestats{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONESTATS;}
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;}
pattern{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PATTERN;}
include-pattern{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_INCLUDEPATTERN;}
remote-control{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REMOTE_CONTROL;}
control-enable{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_ENABLE;}
control-interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_INTERFACE;}
control-port{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_PORT;}
server-key-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_KEY_FILE;}
server-cert-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_CERT_FILE;}
control-key-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_KEY_FILE;}
control-cert-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_CERT_FILE;}
AXFR { LEXOUT(("v(%s) ", yytext)); return VAR_AXFR;}
UDP { LEXOUT(("v(%s) ", yytext)); return VAR_UDP;}
rrl-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_SIZE;}
rrl-ratelimit{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_RATELIMIT;}
rrl-slip{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_SLIP;}
rrl-ipv4-prefix-length{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_IPV4_PREFIX_LENGTH;}
rrl-ipv6-prefix-length{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_IPV6_PREFIX_LENGTH;}
rrl-whitelist-ratelimit{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_WHITELIST_RATELIMIT;}
rrl-whitelist{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_WHITELIST;}
zonefiles-check{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILES_CHECK;}
zonefiles-write{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILES_WRITE;}
log-time-ascii{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_LOG_TIME_ASCII;}
round-robin{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ROUND_ROBIN;}
{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_glob(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_glob(yytext);
BEGIN(INITIAL);
}
<INITIAL><<EOF>> {
yy_set_bol(1); /* Set beginning of line, so "^" rules match. */
if (!config_include_stack) {
yyterminate();
} else {
fclose(yyin);
config_end_include();
}
}
{UNQUOTEDLETTER}* { LEXOUT(("unquotedstr(%s) ", yytext));
yylval.str = region_strdup(cfg_parser->opt->region, yytext); return STRING; }
%%
|
