389 lines
13 KiB
Plaintext
389 lines
13 KiB
Plaintext
%{
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/*
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* configlexer.lex - lexical analyzer for unbound config file
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*
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* Copyright (c) 2001-2006, NLnet Labs. All rights reserved
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*
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* See LICENSE for the license.
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*
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*/
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#include <ctype.h>
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#include <string.h>
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#include <strings.h>
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#ifdef HAVE_GLOB_H
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# include <glob.h>
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#endif
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#include "util/config_file.h"
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#include "util/configparser.h"
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void ub_c_error(const char *message);
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#if 0
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#define LEXOUT(s) printf s /* used ONLY when debugging */
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#else
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#define LEXOUT(s)
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#endif
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/** avoid warning in about fwrite return value */
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#define ECHO ub_c_error_msg("syntax error at text: %s", yytext)
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/** A parser variable, this is a statement in the config file which is
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* of the form variable: value1 value2 ... nargs is the number of values. */
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#define YDVAR(nargs, var) \
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num_args=(nargs); \
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LEXOUT(("v(%s%d) ", yytext, num_args)); \
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if(num_args > 0) { BEGIN(val); } \
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return (var);
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struct inc_state {
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char* filename;
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int line;
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};
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static struct inc_state parse_stack[MAXINCLUDES];
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static YY_BUFFER_STATE include_stack[MAXINCLUDES];
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static int config_include_stack_ptr = 0;
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static int inc_prev = 0;
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static int num_args = 0;
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static void config_start_include(const char* filename)
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{
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FILE *input;
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if(strlen(filename) == 0) {
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ub_c_error_msg("empty include file name");
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return;
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}
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if(config_include_stack_ptr >= MAXINCLUDES) {
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ub_c_error_msg("includes nested too deeply, skipped (>%d)", MAXINCLUDES);
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return;
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}
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if(cfg_parser->chroot && strncmp(filename, cfg_parser->chroot,
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strlen(cfg_parser->chroot)) == 0) {
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filename += strlen(cfg_parser->chroot);
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}
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input = fopen(filename, "r");
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if(!input) {
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ub_c_error_msg("cannot open include file '%s': %s",
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filename, strerror(errno));
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return;
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}
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LEXOUT(("switch_to_include_file(%s) ", filename));
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parse_stack[config_include_stack_ptr].filename = cfg_parser->filename;
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parse_stack[config_include_stack_ptr].line = cfg_parser->line;
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include_stack[config_include_stack_ptr] = YY_CURRENT_BUFFER;
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cfg_parser->filename = strdup(filename);
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cfg_parser->line = 1;
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yy_switch_to_buffer(yy_create_buffer(input, YY_BUF_SIZE));
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++config_include_stack_ptr;
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}
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static void config_start_include_glob(const char* filename)
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{
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/* check for wildcards */
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#ifdef HAVE_GLOB
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glob_t g;
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size_t i;
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int r, flags;
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if(!(!strchr(filename, '*') && !strchr(filename, '?') && !strchr(filename, '[') &&
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!strchr(filename, '{') && !strchr(filename, '~'))) {
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flags = 0
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#ifdef GLOB_ERR
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| GLOB_ERR
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#endif
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#ifdef GLOB_NOSORT
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| GLOB_NOSORT
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#endif
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#ifdef GLOB_BRACE
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| GLOB_BRACE
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#endif
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#ifdef GLOB_TILDE
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| GLOB_TILDE
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#endif
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;
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memset(&g, 0, sizeof(g));
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r = glob(filename, flags, NULL, &g);
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if(r) {
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/* some error */
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globfree(&g);
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config_start_include(filename); /* let original deal with it */
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return;
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}
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/* process files found, if any */
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for(i=0; i<(size_t)g.gl_pathc; i++) {
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config_start_include(g.gl_pathv[i]);
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}
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globfree(&g);
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return;
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}
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#endif /* HAVE_GLOB */
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config_start_include(filename);
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}
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static void config_end_include(void)
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{
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--config_include_stack_ptr;
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free(cfg_parser->filename);
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cfg_parser->filename = parse_stack[config_include_stack_ptr].filename;
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cfg_parser->line = parse_stack[config_include_stack_ptr].line;
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yy_delete_buffer(YY_CURRENT_BUFFER);
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yy_switch_to_buffer(include_stack[config_include_stack_ptr]);
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}
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#ifndef yy_set_bol /* compat definition, for flex 2.4.6 */
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#define yy_set_bol(at_bol) \
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{ \
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if ( ! yy_current_buffer ) \
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yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
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yy_current_buffer->yy_ch_buf[0] = ((at_bol)?'\n':' '); \
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}
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#endif
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%}
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%option noinput
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%option nounput
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%{
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#ifndef YY_NO_UNPUT
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#define YY_NO_UNPUT 1
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#endif
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#ifndef YY_NO_INPUT
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#define YY_NO_INPUT 1
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#endif
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%}
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SPACE [ \t]
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LETTER [a-zA-Z]
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UNQUOTEDLETTER [^\'\"\n\r \t\\]|\\.
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UNQUOTEDLETTER_NOCOLON [^\:\'\"\n\r \t\\]|\\.
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NEWLINE [\r\n]
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COMMENT \#
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COLON \:
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DQANY [^\"\n\r\\]|\\.
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SQANY [^\'\n\r\\]|\\.
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%x quotedstring singlequotedstr include include_quoted val
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%%
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<INITIAL,val>{SPACE}* {
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LEXOUT(("SP ")); /* ignore */ }
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<INITIAL,val>{SPACE}*{COMMENT}.* {
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/* note that flex makes the longest match and '.' is any but not nl */
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LEXOUT(("comment(%s) ", yytext)); /* ignore */ }
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server{COLON} { YDVAR(0, VAR_SERVER) }
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num-threads{COLON} { YDVAR(1, VAR_NUM_THREADS) }
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verbosity{COLON} { YDVAR(1, VAR_VERBOSITY) }
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port{COLON} { YDVAR(1, VAR_PORT) }
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outgoing-range{COLON} { YDVAR(1, VAR_OUTGOING_RANGE) }
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outgoing-port-permit{COLON} { YDVAR(1, VAR_OUTGOING_PORT_PERMIT) }
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outgoing-port-avoid{COLON} { YDVAR(1, VAR_OUTGOING_PORT_AVOID) }
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outgoing-num-tcp{COLON} { YDVAR(1, VAR_OUTGOING_NUM_TCP) }
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incoming-num-tcp{COLON} { YDVAR(1, VAR_INCOMING_NUM_TCP) }
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do-ip4{COLON} { YDVAR(1, VAR_DO_IP4) }
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do-ip6{COLON} { YDVAR(1, VAR_DO_IP6) }
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do-udp{COLON} { YDVAR(1, VAR_DO_UDP) }
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do-tcp{COLON} { YDVAR(1, VAR_DO_TCP) }
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tcp-upstream{COLON} { YDVAR(1, VAR_TCP_UPSTREAM) }
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ssl-upstream{COLON} { YDVAR(1, VAR_SSL_UPSTREAM) }
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ssl-service-key{COLON} { YDVAR(1, VAR_SSL_SERVICE_KEY) }
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ssl-service-pem{COLON} { YDVAR(1, VAR_SSL_SERVICE_PEM) }
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ssl-port{COLON} { YDVAR(1, VAR_SSL_PORT) }
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do-daemonize{COLON} { YDVAR(1, VAR_DO_DAEMONIZE) }
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interface{COLON} { YDVAR(1, VAR_INTERFACE) }
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outgoing-interface{COLON} { YDVAR(1, VAR_OUTGOING_INTERFACE) }
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interface-automatic{COLON} { YDVAR(1, VAR_INTERFACE_AUTOMATIC) }
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so-rcvbuf{COLON} { YDVAR(1, VAR_SO_RCVBUF) }
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so-sndbuf{COLON} { YDVAR(1, VAR_SO_SNDBUF) }
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chroot{COLON} { YDVAR(1, VAR_CHROOT) }
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username{COLON} { YDVAR(1, VAR_USERNAME) }
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directory{COLON} { YDVAR(1, VAR_DIRECTORY) }
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logfile{COLON} { YDVAR(1, VAR_LOGFILE) }
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pidfile{COLON} { YDVAR(1, VAR_PIDFILE) }
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root-hints{COLON} { YDVAR(1, VAR_ROOT_HINTS) }
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edns-buffer-size{COLON} { YDVAR(1, VAR_EDNS_BUFFER_SIZE) }
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msg-buffer-size{COLON} { YDVAR(1, VAR_MSG_BUFFER_SIZE) }
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msg-cache-size{COLON} { YDVAR(1, VAR_MSG_CACHE_SIZE) }
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msg-cache-slabs{COLON} { YDVAR(1, VAR_MSG_CACHE_SLABS) }
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rrset-cache-size{COLON} { YDVAR(1, VAR_RRSET_CACHE_SIZE) }
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rrset-cache-slabs{COLON} { YDVAR(1, VAR_RRSET_CACHE_SLABS) }
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cache-max-ttl{COLON} { YDVAR(1, VAR_CACHE_MAX_TTL) }
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cache-min-ttl{COLON} { YDVAR(1, VAR_CACHE_MIN_TTL) }
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infra-host-ttl{COLON} { YDVAR(1, VAR_INFRA_HOST_TTL) }
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infra-lame-ttl{COLON} { YDVAR(1, VAR_INFRA_LAME_TTL) }
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infra-cache-slabs{COLON} { YDVAR(1, VAR_INFRA_CACHE_SLABS) }
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infra-cache-numhosts{COLON} { YDVAR(1, VAR_INFRA_CACHE_NUMHOSTS) }
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infra-cache-lame-size{COLON} { YDVAR(1, VAR_INFRA_CACHE_LAME_SIZE) }
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num-queries-per-thread{COLON} { YDVAR(1, VAR_NUM_QUERIES_PER_THREAD) }
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jostle-timeout{COLON} { YDVAR(1, VAR_JOSTLE_TIMEOUT) }
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target-fetch-policy{COLON} { YDVAR(1, VAR_TARGET_FETCH_POLICY) }
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harden-short-bufsize{COLON} { YDVAR(1, VAR_HARDEN_SHORT_BUFSIZE) }
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harden-large-queries{COLON} { YDVAR(1, VAR_HARDEN_LARGE_QUERIES) }
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harden-glue{COLON} { YDVAR(1, VAR_HARDEN_GLUE) }
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harden-dnssec-stripped{COLON} { YDVAR(1, VAR_HARDEN_DNSSEC_STRIPPED) }
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harden-below-nxdomain{COLON} { YDVAR(1, VAR_HARDEN_BELOW_NXDOMAIN) }
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harden-referral-path{COLON} { YDVAR(1, VAR_HARDEN_REFERRAL_PATH) }
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use-caps-for-id{COLON} { YDVAR(1, VAR_USE_CAPS_FOR_ID) }
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unwanted-reply-threshold{COLON} { YDVAR(1, VAR_UNWANTED_REPLY_THRESHOLD) }
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private-address{COLON} { YDVAR(1, VAR_PRIVATE_ADDRESS) }
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private-domain{COLON} { YDVAR(1, VAR_PRIVATE_DOMAIN) }
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prefetch-key{COLON} { YDVAR(1, VAR_PREFETCH_KEY) }
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prefetch{COLON} { YDVAR(1, VAR_PREFETCH) }
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stub-zone{COLON} { YDVAR(0, VAR_STUB_ZONE) }
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name{COLON} { YDVAR(1, VAR_NAME) }
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stub-addr{COLON} { YDVAR(1, VAR_STUB_ADDR) }
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stub-host{COLON} { YDVAR(1, VAR_STUB_HOST) }
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stub-prime{COLON} { YDVAR(1, VAR_STUB_PRIME) }
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stub-first{COLON} { YDVAR(1, VAR_STUB_FIRST) }
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forward-zone{COLON} { YDVAR(0, VAR_FORWARD_ZONE) }
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forward-addr{COLON} { YDVAR(1, VAR_FORWARD_ADDR) }
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forward-host{COLON} { YDVAR(1, VAR_FORWARD_HOST) }
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forward-first{COLON} { YDVAR(1, VAR_FORWARD_FIRST) }
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do-not-query-address{COLON} { YDVAR(1, VAR_DO_NOT_QUERY_ADDRESS) }
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do-not-query-localhost{COLON} { YDVAR(1, VAR_DO_NOT_QUERY_LOCALHOST) }
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access-control{COLON} { YDVAR(2, VAR_ACCESS_CONTROL) }
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hide-identity{COLON} { YDVAR(1, VAR_HIDE_IDENTITY) }
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hide-version{COLON} { YDVAR(1, VAR_HIDE_VERSION) }
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identity{COLON} { YDVAR(1, VAR_IDENTITY) }
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version{COLON} { YDVAR(1, VAR_VERSION) }
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module-config{COLON} { YDVAR(1, VAR_MODULE_CONF) }
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dlv-anchor{COLON} { YDVAR(1, VAR_DLV_ANCHOR) }
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dlv-anchor-file{COLON} { YDVAR(1, VAR_DLV_ANCHOR_FILE) }
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trust-anchor-file{COLON} { YDVAR(1, VAR_TRUST_ANCHOR_FILE) }
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auto-trust-anchor-file{COLON} { YDVAR(1, VAR_AUTO_TRUST_ANCHOR_FILE) }
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trusted-keys-file{COLON} { YDVAR(1, VAR_TRUSTED_KEYS_FILE) }
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trust-anchor{COLON} { YDVAR(1, VAR_TRUST_ANCHOR) }
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val-override-date{COLON} { YDVAR(1, VAR_VAL_OVERRIDE_DATE) }
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val-sig-skew-min{COLON} { YDVAR(1, VAR_VAL_SIG_SKEW_MIN) }
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val-sig-skew-max{COLON} { YDVAR(1, VAR_VAL_SIG_SKEW_MAX) }
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val-bogus-ttl{COLON} { YDVAR(1, VAR_BOGUS_TTL) }
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val-clean-additional{COLON} { YDVAR(1, VAR_VAL_CLEAN_ADDITIONAL) }
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val-permissive-mode{COLON} { YDVAR(1, VAR_VAL_PERMISSIVE_MODE) }
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ignore-cd-flag{COLON} { YDVAR(1, VAR_IGNORE_CD_FLAG) }
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val-log-level{COLON} { YDVAR(1, VAR_VAL_LOG_LEVEL) }
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key-cache-size{COLON} { YDVAR(1, VAR_KEY_CACHE_SIZE) }
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key-cache-slabs{COLON} { YDVAR(1, VAR_KEY_CACHE_SLABS) }
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neg-cache-size{COLON} { YDVAR(1, VAR_NEG_CACHE_SIZE) }
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val-nsec3-keysize-iterations{COLON} {
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YDVAR(1, VAR_VAL_NSEC3_KEYSIZE_ITERATIONS) }
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add-holddown{COLON} { YDVAR(1, VAR_ADD_HOLDDOWN) }
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del-holddown{COLON} { YDVAR(1, VAR_DEL_HOLDDOWN) }
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keep-missing{COLON} { YDVAR(1, VAR_KEEP_MISSING) }
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use-syslog{COLON} { YDVAR(1, VAR_USE_SYSLOG) }
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log-time-ascii{COLON} { YDVAR(1, VAR_LOG_TIME_ASCII) }
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log-queries{COLON} { YDVAR(1, VAR_LOG_QUERIES) }
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local-zone{COLON} { YDVAR(2, VAR_LOCAL_ZONE) }
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local-data{COLON} { YDVAR(1, VAR_LOCAL_DATA) }
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local-data-ptr{COLON} { YDVAR(1, VAR_LOCAL_DATA_PTR) }
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statistics-interval{COLON} { YDVAR(1, VAR_STATISTICS_INTERVAL) }
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statistics-cumulative{COLON} { YDVAR(1, VAR_STATISTICS_CUMULATIVE) }
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extended-statistics{COLON} { YDVAR(1, VAR_EXTENDED_STATISTICS) }
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remote-control{COLON} { YDVAR(0, VAR_REMOTE_CONTROL) }
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control-enable{COLON} { YDVAR(1, VAR_CONTROL_ENABLE) }
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control-interface{COLON} { YDVAR(1, VAR_CONTROL_INTERFACE) }
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control-port{COLON} { YDVAR(1, VAR_CONTROL_PORT) }
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server-key-file{COLON} { YDVAR(1, VAR_SERVER_KEY_FILE) }
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server-cert-file{COLON} { YDVAR(1, VAR_SERVER_CERT_FILE) }
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control-key-file{COLON} { YDVAR(1, VAR_CONTROL_KEY_FILE) }
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control-cert-file{COLON} { YDVAR(1, VAR_CONTROL_CERT_FILE) }
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python-script{COLON} { YDVAR(1, VAR_PYTHON_SCRIPT) }
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python{COLON} { YDVAR(0, VAR_PYTHON) }
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domain-insecure{COLON} { YDVAR(1, VAR_DOMAIN_INSECURE) }
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minimal-responses{COLON} { YDVAR(1, VAR_MINIMAL_RESPONSES) }
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rrset-roundrobin{COLON} { YDVAR(1, VAR_RRSET_ROUNDROBIN) }
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<INITIAL,val>{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++; }
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/* Quoted strings. Strip leading and ending quotes */
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<val>\" { BEGIN(quotedstring); LEXOUT(("QS ")); }
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<quotedstring><<EOF>> {
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yyerror("EOF inside quoted string");
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if(--num_args == 0) { BEGIN(INITIAL); }
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else { BEGIN(val); }
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}
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<quotedstring>{DQANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); }
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<quotedstring>{NEWLINE} { yyerror("newline inside quoted string, no end \"");
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cfg_parser->line++; BEGIN(INITIAL); }
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<quotedstring>\" {
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LEXOUT(("QE "));
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if(--num_args == 0) { BEGIN(INITIAL); }
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else { BEGIN(val); }
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yytext[yyleng - 1] = '\0';
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yylval.str = strdup(yytext);
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if(!yylval.str)
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yyerror("out of memory");
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return STRING_ARG;
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}
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/* Single Quoted strings. Strip leading and ending quotes */
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<val>\' { BEGIN(singlequotedstr); LEXOUT(("SQS ")); }
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<singlequotedstr><<EOF>> {
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yyerror("EOF inside quoted string");
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if(--num_args == 0) { BEGIN(INITIAL); }
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else { BEGIN(val); }
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}
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<singlequotedstr>{SQANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); }
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<singlequotedstr>{NEWLINE} { yyerror("newline inside quoted string, no end '");
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cfg_parser->line++; BEGIN(INITIAL); }
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<singlequotedstr>\' {
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LEXOUT(("SQE "));
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if(--num_args == 0) { BEGIN(INITIAL); }
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else { BEGIN(val); }
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yytext[yyleng - 1] = '\0';
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yylval.str = strdup(yytext);
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if(!yylval.str)
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yyerror("out of memory");
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return STRING_ARG;
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}
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/* include: directive */
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<INITIAL,val>include{COLON} {
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LEXOUT(("v(%s) ", yytext)); inc_prev = YYSTATE; BEGIN(include); }
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<include><<EOF>> {
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yyerror("EOF inside include directive");
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BEGIN(inc_prev);
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}
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<include>{SPACE}* { LEXOUT(("ISP ")); /* ignore */ }
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<include>{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++;}
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<include>\" { LEXOUT(("IQS ")); BEGIN(include_quoted); }
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<include>{UNQUOTEDLETTER}* {
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LEXOUT(("Iunquotedstr(%s) ", yytext));
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config_start_include_glob(yytext);
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BEGIN(inc_prev);
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}
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<include_quoted><<EOF>> {
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yyerror("EOF inside quoted string");
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BEGIN(inc_prev);
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}
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<include_quoted>{DQANY}* { LEXOUT(("ISTR(%s) ", yytext)); yymore(); }
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<include_quoted>{NEWLINE} { yyerror("newline before \" in include name");
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cfg_parser->line++; BEGIN(inc_prev); }
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<include_quoted>\" {
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LEXOUT(("IQE "));
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yytext[yyleng - 1] = '\0';
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config_start_include_glob(yytext);
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BEGIN(inc_prev);
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}
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<INITIAL,val><<EOF>> {
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yy_set_bol(1); /* Set beginning of line, so "^" rules match. */
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if (config_include_stack_ptr == 0) {
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yyterminate();
|
|
} else {
|
|
fclose(yyin);
|
|
config_end_include();
|
|
}
|
|
}
|
|
|
|
<val>{UNQUOTEDLETTER}* { LEXOUT(("unquotedstr(%s) ", yytext));
|
|
if(--num_args == 0) { BEGIN(INITIAL); }
|
|
yylval.str = strdup(yytext); return STRING_ARG; }
|
|
|
|
{UNQUOTEDLETTER_NOCOLON}* {
|
|
ub_c_error_msg("unknown keyword '%s'", yytext);
|
|
}
|
|
|
|
<*>. {
|
|
ub_c_error_msg("stray '%s'", yytext);
|
|
}
|
|
|
|
%%
|