configlexer.lex revision 1.1.1.6
1%{ 2/* 3 * configlexer.lex - lexical analyzer for NSD config file 4 * 5 * Copyright (c) 2001-2006, NLnet Labs. All rights reserved 6 * 7 * See LICENSE for the license. 8 * 9 */ 10/* because flex keeps having sign-unsigned compare problems that are unfixed*/ 11#if defined(__clang__)||(defined(__GNUC__)&&((__GNUC__ >4)||(defined(__GNUC_MINOR__)&&(__GNUC__ ==4)&&(__GNUC_MINOR__ >=2)))) 12#pragma GCC diagnostic ignored "-Wsign-compare" 13#endif 14 15#include "config.h" 16 17#include <ctype.h> 18#include <errno.h> 19#include <string.h> 20#include <strings.h> 21#ifdef HAVE_GLOB_H 22# include <glob.h> 23#endif 24 25#include "options.h" 26#include "configyyrename.h" 27#include "configparser.h" 28 29#if 0 30#define LEXOUT(s) printf s /* used ONLY when debugging */ 31#else 32#define LEXOUT(s) 33#endif 34 35struct inc_state { 36 char* filename; 37 int line; 38 YY_BUFFER_STATE buffer; 39 struct inc_state* next; 40}; 41static struct inc_state* config_include_stack = NULL; 42static int inc_depth = 0; 43 44static void config_start_include(const char* filename) 45{ 46 FILE *input; 47 struct inc_state* s; 48 char* nm; 49 if(inc_depth++ > 10000000) { 50 yyerror("too many include files"); 51 return; 52 } 53 if(strlen(filename) == 0) { 54 yyerror("empty include file name"); 55 return; 56 } 57 s = (struct inc_state*)malloc(sizeof(*s)); 58 if(!s) { 59 yyerror("include %s: malloc failure", filename); 60 return; 61 } 62 nm = strdup(filename); 63 if(!nm) { 64 yyerror("include %s: strdup failure", filename); 65 free(s); 66 return; 67 } 68 input = fopen(filename, "r"); 69 if(!input) { 70 yyerror("cannot open include file '%s': %s", 71 filename, strerror(errno)); 72 free(s); 73 free(nm); 74 return; 75 } 76 LEXOUT(("switch_to_include_file(%s) ", filename)); 77 s->filename = cfg_parser->filename; 78 s->line = cfg_parser->line; 79 s->buffer = YY_CURRENT_BUFFER; 80 s->next = config_include_stack; 81 config_include_stack = s; 82 83 cfg_parser->filename = nm; 84 cfg_parser->line = 1; 85 yy_switch_to_buffer(yy_create_buffer(input, YY_BUF_SIZE)); 86} 87 88static void config_start_include_glob(const char* filename) 89{ 90 /* check for wildcards */ 91#ifdef HAVE_GLOB 92 glob_t g; 93 int i, r, flags; 94#endif /* HAVE_GLOB */ 95 if (cfg_parser->chroot) { 96 int l = strlen(cfg_parser->chroot); /* chroot has trailing slash */ 97 if (strncmp(cfg_parser->chroot, filename, l) != 0) { 98 yyerror("include file '%s' is not relative to chroot '%s'", 99 filename, cfg_parser->chroot); 100 return; 101 } 102 filename += l - 1; /* strip chroot without trailing slash */ 103 } 104#ifdef HAVE_GLOB 105 if(!(!strchr(filename, '*') && !strchr(filename, '?') && 106 !strchr(filename, '[') && !strchr(filename, '{') && 107 !strchr(filename, '~'))) { 108 flags = 0 109#ifdef GLOB_ERR 110 | GLOB_ERR 111#endif 112 /* do not set GLOB_NOSORT so the results are sorted 113 and in a predictable order. */ 114#ifdef GLOB_BRACE 115 | GLOB_BRACE 116#endif 117#ifdef GLOB_TILDE 118 | GLOB_TILDE 119#endif 120 ; 121 memset(&g, 0, sizeof(g)); 122 r = glob(filename, flags, NULL, &g); 123 if(r) { 124 /* some error */ 125 globfree(&g); 126 if(r == GLOB_NOMATCH) 127 return; /* no matches for pattern */ 128 config_start_include(filename); /* let original deal with it */ 129 return; 130 } 131 /* process files found, if any */ 132 for(i=(int)g.gl_pathc-1; i>=0; i--) { 133 config_start_include(g.gl_pathv[i]); 134 } 135 globfree(&g); 136 return; 137 } 138#endif /* HAVE_GLOB */ 139 config_start_include(filename); 140} 141 142static void config_end_include(void) 143{ 144 struct inc_state* s = config_include_stack; 145 --inc_depth; 146 if(!s) return; 147 free(cfg_parser->filename); 148 cfg_parser->filename = s->filename; 149 cfg_parser->line = s->line; 150 yy_delete_buffer(YY_CURRENT_BUFFER); 151 yy_switch_to_buffer(s->buffer); 152 config_include_stack = s->next; 153 free(s); 154} 155 156#ifndef yy_set_bol /* compat definition, for flex 2.4.6 */ 157#define yy_set_bol(at_bol) \ 158 { \ 159 if ( ! yy_current_buffer ) \ 160 yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \ 161 yy_current_buffer->yy_ch_buf[0] = ((at_bol)?'\n':' '); \ 162 } 163#endif 164 165%} 166%option noinput 167%option nounput 168%{ 169#ifndef YY_NO_UNPUT 170#define YY_NO_UNPUT 1 171#endif 172#ifndef YY_NO_INPUT 173#define YY_NO_INPUT 1 174#endif 175%} 176 177SPACE [ \t] 178LETTER [a-zA-Z] 179UNQUOTEDLETTER [^\"\n\r \t\\]|\\. 180NEWLINE [\r\n] 181COMMENT \# 182COLON \: 183ANY [^\"\n\r\\]|\\. 184 185%x quotedstring include include_quoted 186 187%% 188{SPACE}* { LEXOUT(("SP ")); /* ignore */ } 189{SPACE}*{COMMENT}.* { LEXOUT(("comment(%s) ", yytext)); /* ignore */ } 190server{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER;} 191name{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NAME;} 192ip-address{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_ADDRESS;} 193interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_ADDRESS;} 194ip-transparent{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_TRANSPARENT;} 195ip-freebind{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP_FREEBIND;} 196send-buffer-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SEND_BUFFER_SIZE;} 197receive-buffer-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RECEIVE_BUFFER_SIZE;} 198debug-mode{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DEBUG_MODE;} 199use-systemd{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_USE_SYSTEMD;} 200hide-version{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_HIDE_VERSION;} 201hide-identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_HIDE_IDENTITY;} 202drop-updates{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DROP_UPDATES; } 203ip4-only{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP4_ONLY;} 204ip6-only{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IP6_ONLY;} 205do-ip4{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DO_IP4;} 206do-ip6{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DO_IP6;} 207database{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DATABASE;} 208identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IDENTITY;} 209version{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_VERSION;} 210nsid{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NSID;} 211logfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_LOGFILE;} 212log-only-syslog{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_LOG_ONLY_SYSLOG;} 213server-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_COUNT;} 214tcp-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_COUNT;} 215tcp-reject-overflow{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_REJECT_OVERFLOW;} 216tcp-query-count{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_QUERY_COUNT;} 217tcp-timeout{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_TIMEOUT;} 218tcp-mss{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TCP_MSS;} 219outgoing-tcp-mss{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_OUTGOING_TCP_MSS;} 220ipv4-edns-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IPV4_EDNS_SIZE;} 221ipv6-edns-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_IPV6_EDNS_SIZE;} 222pidfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PIDFILE;} 223port{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PORT;} 224reuseport{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REUSEPORT;} 225statistics{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_STATISTICS;} 226chroot{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CHROOT;} 227username{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_USERNAME;} 228zonesdir{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONESDIR;} 229zonelistfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONELISTFILE;} 230difffile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DIFFFILE;} 231xfrdfile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRDFILE;} 232xfrdir{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRDIR;} 233xfrd-reload-timeout{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRD_RELOAD_TIMEOUT;} 234verbosity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_VERBOSITY;} 235zone{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONE;} 236zonefile{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILE;} 237zonestats{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONESTATS;} 238allow-notify{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALLOW_NOTIFY;} 239size-limit-xfr{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SIZE_LIMIT_XFR;} 240request-xfr{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REQUEST_XFR;} 241notify{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NOTIFY;} 242notify-retry{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_NOTIFY_RETRY;} 243provide-xfr{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PROVIDE_XFR;} 244outgoing-interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_OUTGOING_INTERFACE;} 245allow-axfr-fallback{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALLOW_AXFR_FALLBACK;} 246key{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_KEY;} 247algorithm{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ALGORITHM;} 248secret{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SECRET;} 249pattern{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_PATTERN;} 250include-pattern{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_INCLUDE_PATTERN;} 251remote-control{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REMOTE_CONTROL;} 252control-enable{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_ENABLE;} 253control-interface{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_INTERFACE;} 254control-port{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_PORT;} 255server-key-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_KEY_FILE;} 256server-cert-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_SERVER_CERT_FILE;} 257control-key-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_KEY_FILE;} 258control-cert-file{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONTROL_CERT_FILE;} 259AXFR { LEXOUT(("v(%s) ", yytext)); return VAR_AXFR;} 260UDP { LEXOUT(("v(%s) ", yytext)); return VAR_UDP;} 261rrl-size{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_SIZE;} 262rrl-ratelimit{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_RATELIMIT;} 263rrl-slip{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_SLIP;} 264rrl-ipv4-prefix-length{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_IPV4_PREFIX_LENGTH;} 265rrl-ipv6-prefix-length{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_IPV6_PREFIX_LENGTH;} 266rrl-whitelist-ratelimit{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_WHITELIST_RATELIMIT;} 267rrl-whitelist{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_RRL_WHITELIST;} 268zonefiles-check{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILES_CHECK;} 269zonefiles-write{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ZONEFILES_WRITE;} 270dnstap{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP;} 271dnstap-enable{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_ENABLE;} 272dnstap-socket-path{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_SOCKET_PATH; } 273dnstap-send-identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_SEND_IDENTITY; } 274dnstap-send-version{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_SEND_VERSION; } 275dnstap-identity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_IDENTITY; } 276dnstap-version{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_VERSION; } 277dnstap-log-auth-query-messages{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_LOG_AUTH_QUERY_MESSAGES; } 278dnstap-log-auth-response-messages{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_DNSTAP_LOG_AUTH_RESPONSE_MESSAGES; } 279log-time-ascii{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_LOG_TIME_ASCII;} 280round-robin{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_ROUND_ROBIN;} 281minimal-responses{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MINIMAL_RESPONSES;} 282confine-to-zone{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CONFINE_TO_ZONE;} 283refuse-any{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_REFUSE_ANY;} 284max-refresh-time{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MAX_REFRESH_TIME;} 285min-refresh-time{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MIN_REFRESH_TIME;} 286max-retry-time{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MAX_RETRY_TIME;} 287min-retry-time{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MIN_RETRY_TIME;} 288min-expire-time{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MIN_EXPIRE_TIME;} 289multi-master-check{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_MULTI_MASTER_CHECK;} 290tls-service-key{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TLS_SERVICE_KEY;} 291tls-service-ocsp{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TLS_SERVICE_OCSP;} 292tls-service-pem{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TLS_SERVICE_PEM;} 293tls-port{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_TLS_PORT;} 294{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++;} 295 296servers={UNQUOTEDLETTER}* { 297 yyless(yyleng - (yyleng - 8)); 298 LEXOUT(("v(%s) ", yytext)); 299 return VAR_SERVERS; 300} 301bindtodevice={UNQUOTEDLETTER}* { 302 yyless(yyleng - (yyleng - 13)); 303 LEXOUT(("v(%s) ", yytext)); 304 return VAR_BINDTODEVICE; 305} 306setfib={UNQUOTEDLETTER}* { 307 yyless(yyleng - (yyleng - 7)); 308 LEXOUT(("v(%s) ", yytext)); 309 return VAR_SETFIB; 310} 311 312cpu-affinity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_CPU_AFFINITY; } 313xfrd-cpu-affinity{COLON} { LEXOUT(("v(%s) ", yytext)); return VAR_XFRD_CPU_AFFINITY; } 314server-[1-9][0-9]*-cpu-affinity{COLON} { 315 char *str = yytext; 316 LEXOUT(("v(%s) ", yytext)); 317 /* Skip server- */ 318 while (*str != '\0' && (*str < '0' || *str > '9')) { 319 str++; 320 } 321 yylval.llng = strtoll(str, NULL, 10); 322 return VAR_SERVER_CPU_AFFINITY; 323 } 324 325 /* Quoted strings. Strip leading and ending quotes */ 326\" { BEGIN(quotedstring); LEXOUT(("QS ")); } 327<quotedstring><<EOF>> { 328 yyerror("EOF inside quoted string"); 329 BEGIN(INITIAL); 330} 331<quotedstring>{ANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); } 332<quotedstring>\n { cfg_parser->line++; yymore(); } 333<quotedstring>\" { 334 LEXOUT(("QE ")); 335 BEGIN(INITIAL); 336 yytext[yyleng - 1] = '\0'; 337 yylval.str = region_strdup(cfg_parser->opt->region, yytext); 338 return STRING; 339} 340 341 /* include: directive */ 342include{COLON} { LEXOUT(("v(%s) ", yytext)); BEGIN(include); } 343<include><<EOF>> { 344 yyerror("EOF inside include directive"); 345 BEGIN(INITIAL); 346} 347<include>{SPACE}* { LEXOUT(("ISP ")); /* ignore */ } 348<include>{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++;} 349<include>\" { LEXOUT(("IQS ")); BEGIN(include_quoted); } 350<include>{UNQUOTEDLETTER}* { 351 LEXOUT(("Iunquotedstr(%s) ", yytext)); 352 config_start_include_glob(yytext); 353 BEGIN(INITIAL); 354} 355<include_quoted><<EOF>> { 356 yyerror("EOF inside quoted string"); 357 BEGIN(INITIAL); 358} 359<include_quoted>{ANY}* { LEXOUT(("ISTR(%s) ", yytext)); yymore(); } 360<include_quoted>{NEWLINE} { cfg_parser->line++; yymore(); } 361<include_quoted>\" { 362 LEXOUT(("IQE ")); 363 yytext[yyleng - 1] = '\0'; 364 config_start_include_glob(yytext); 365 BEGIN(INITIAL); 366} 367<INITIAL><<EOF>> { 368 yy_set_bol(1); /* Set beginning of line, so "^" rules match. */ 369 if (!config_include_stack) { 370 yyterminate(); 371 } else { 372 fclose(yyin); 373 config_end_include(); 374 } 375} 376 377{UNQUOTEDLETTER}* { LEXOUT(("unquotedstr(%s) ", yytext)); 378 yylval.str = region_strdup(cfg_parser->opt->region, yytext); return STRING; } 379 380%% 381