diff options
Diffstat (limited to 'external/unbound/util/configlexer.lex')
| -rw-r--r-- | external/unbound/util/configlexer.lex | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/external/unbound/util/configlexer.lex b/external/unbound/util/configlexer.lex new file mode 100644 index 000000000..7ee7b9bd9 --- /dev/null +++ b/external/unbound/util/configlexer.lex @@ -0,0 +1,444 @@ +%{ +/* + * configlexer.lex - lexical analyzer for unbound config file + * + * Copyright (c) 2001-2006, NLnet Labs. All rights reserved + * + * See LICENSE for the license. + * + */ +#include <ctype.h> +#include <string.h> +#include <strings.h> +#ifdef HAVE_GLOB_H +# include <glob.h> +#endif + +#include "util/config_file.h" +#include "util/configparser.h" +void ub_c_error(const char *message); + +#if 0 +#define LEXOUT(s) printf s /* used ONLY when debugging */ +#else +#define LEXOUT(s) +#endif + +/** avoid warning in about fwrite return value */ +#define ECHO ub_c_error_msg("syntax error at text: %s", yytext) + +/** A parser variable, this is a statement in the config file which is + * of the form variable: value1 value2 ... nargs is the number of values. */ +#define YDVAR(nargs, var) \ + num_args=(nargs); \ + LEXOUT(("v(%s%d) ", yytext, num_args)); \ + if(num_args > 0) { BEGIN(val); } \ + return (var); + +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++ > 100000) { + ub_c_error_msg("too many include files"); + return; + } + if(strlen(filename) == 0) { + ub_c_error_msg("empty include file name"); + return; + } + s = (struct inc_state*)malloc(sizeof(*s)); + if(!s) { + ub_c_error_msg("include %s: malloc failure", filename); + return; + } + if(cfg_parser->chroot && strncmp(filename, cfg_parser->chroot, + strlen(cfg_parser->chroot)) == 0) { + filename += strlen(cfg_parser->chroot); + } + nm = strdup(filename); + if(!nm) { + ub_c_error_msg("include %s: strdup failure", filename); + free(s); + return; + } + input = fopen(filename, "r"); + if(!input) { + ub_c_error_msg("cannot open include file '%s': %s", + filename, strerror(errno)); + free(s); + free(nm); + return; + } + LEXOUT(("switch_to_include_file(%s)\n", 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\\]|\\. +UNQUOTEDLETTER_NOCOLON [^\:\'\"\n\r \t\\]|\\. +NEWLINE [\r\n] +COMMENT \# +COLON \: +DQANY [^\"\n\r\\]|\\. +SQANY [^\'\n\r\\]|\\. + +%x quotedstring singlequotedstr include include_quoted val + +%% +<INITIAL,val>{SPACE}* { + LEXOUT(("SP ")); /* ignore */ } +<INITIAL,val>{SPACE}*{COMMENT}.* { + /* note that flex makes the longest match and '.' is any but not nl */ + LEXOUT(("comment(%s) ", yytext)); /* ignore */ } +server{COLON} { YDVAR(0, VAR_SERVER) } +num-threads{COLON} { YDVAR(1, VAR_NUM_THREADS) } +verbosity{COLON} { YDVAR(1, VAR_VERBOSITY) } +port{COLON} { YDVAR(1, VAR_PORT) } +outgoing-range{COLON} { YDVAR(1, VAR_OUTGOING_RANGE) } +outgoing-port-permit{COLON} { YDVAR(1, VAR_OUTGOING_PORT_PERMIT) } +outgoing-port-avoid{COLON} { YDVAR(1, VAR_OUTGOING_PORT_AVOID) } +outgoing-num-tcp{COLON} { YDVAR(1, VAR_OUTGOING_NUM_TCP) } +incoming-num-tcp{COLON} { YDVAR(1, VAR_INCOMING_NUM_TCP) } +do-ip4{COLON} { YDVAR(1, VAR_DO_IP4) } +do-ip6{COLON} { YDVAR(1, VAR_DO_IP6) } +do-udp{COLON} { YDVAR(1, VAR_DO_UDP) } +do-tcp{COLON} { YDVAR(1, VAR_DO_TCP) } +tcp-upstream{COLON} { YDVAR(1, VAR_TCP_UPSTREAM) } +ssl-upstream{COLON} { YDVAR(1, VAR_SSL_UPSTREAM) } +ssl-service-key{COLON} { YDVAR(1, VAR_SSL_SERVICE_KEY) } +ssl-service-pem{COLON} { YDVAR(1, VAR_SSL_SERVICE_PEM) } +ssl-port{COLON} { YDVAR(1, VAR_SSL_PORT) } +do-daemonize{COLON} { YDVAR(1, VAR_DO_DAEMONIZE) } +interface{COLON} { YDVAR(1, VAR_INTERFACE) } +ip-address{COLON} { YDVAR(1, VAR_INTERFACE) } +outgoing-interface{COLON} { YDVAR(1, VAR_OUTGOING_INTERFACE) } +interface-automatic{COLON} { YDVAR(1, VAR_INTERFACE_AUTOMATIC) } +so-rcvbuf{COLON} { YDVAR(1, VAR_SO_RCVBUF) } +so-sndbuf{COLON} { YDVAR(1, VAR_SO_SNDBUF) } +so-reuseport{COLON} { YDVAR(1, VAR_SO_REUSEPORT) } +chroot{COLON} { YDVAR(1, VAR_CHROOT) } +username{COLON} { YDVAR(1, VAR_USERNAME) } +directory{COLON} { YDVAR(1, VAR_DIRECTORY) } +logfile{COLON} { YDVAR(1, VAR_LOGFILE) } +pidfile{COLON} { YDVAR(1, VAR_PIDFILE) } +root-hints{COLON} { YDVAR(1, VAR_ROOT_HINTS) } +edns-buffer-size{COLON} { YDVAR(1, VAR_EDNS_BUFFER_SIZE) } +msg-buffer-size{COLON} { YDVAR(1, VAR_MSG_BUFFER_SIZE) } +msg-cache-size{COLON} { YDVAR(1, VAR_MSG_CACHE_SIZE) } +msg-cache-slabs{COLON} { YDVAR(1, VAR_MSG_CACHE_SLABS) } +rrset-cache-size{COLON} { YDVAR(1, VAR_RRSET_CACHE_SIZE) } +rrset-cache-slabs{COLON} { YDVAR(1, VAR_RRSET_CACHE_SLABS) } +cache-max-ttl{COLON} { YDVAR(1, VAR_CACHE_MAX_TTL) } +cache-min-ttl{COLON} { YDVAR(1, VAR_CACHE_MIN_TTL) } +infra-host-ttl{COLON} { YDVAR(1, VAR_INFRA_HOST_TTL) } +infra-lame-ttl{COLON} { YDVAR(1, VAR_INFRA_LAME_TTL) } +infra-cache-slabs{COLON} { YDVAR(1, VAR_INFRA_CACHE_SLABS) } +infra-cache-numhosts{COLON} { YDVAR(1, VAR_INFRA_CACHE_NUMHOSTS) } +infra-cache-lame-size{COLON} { YDVAR(1, VAR_INFRA_CACHE_LAME_SIZE) } +num-queries-per-thread{COLON} { YDVAR(1, VAR_NUM_QUERIES_PER_THREAD) } +jostle-timeout{COLON} { YDVAR(1, VAR_JOSTLE_TIMEOUT) } +delay-close{COLON} { YDVAR(1, VAR_DELAY_CLOSE) } +target-fetch-policy{COLON} { YDVAR(1, VAR_TARGET_FETCH_POLICY) } +harden-short-bufsize{COLON} { YDVAR(1, VAR_HARDEN_SHORT_BUFSIZE) } +harden-large-queries{COLON} { YDVAR(1, VAR_HARDEN_LARGE_QUERIES) } +harden-glue{COLON} { YDVAR(1, VAR_HARDEN_GLUE) } +harden-dnssec-stripped{COLON} { YDVAR(1, VAR_HARDEN_DNSSEC_STRIPPED) } +harden-below-nxdomain{COLON} { YDVAR(1, VAR_HARDEN_BELOW_NXDOMAIN) } +harden-referral-path{COLON} { YDVAR(1, VAR_HARDEN_REFERRAL_PATH) } +use-caps-for-id{COLON} { YDVAR(1, VAR_USE_CAPS_FOR_ID) } +unwanted-reply-threshold{COLON} { YDVAR(1, VAR_UNWANTED_REPLY_THRESHOLD) } +private-address{COLON} { YDVAR(1, VAR_PRIVATE_ADDRESS) } +private-domain{COLON} { YDVAR(1, VAR_PRIVATE_DOMAIN) } +prefetch-key{COLON} { YDVAR(1, VAR_PREFETCH_KEY) } +prefetch{COLON} { YDVAR(1, VAR_PREFETCH) } +stub-zone{COLON} { YDVAR(0, VAR_STUB_ZONE) } +name{COLON} { YDVAR(1, VAR_NAME) } +stub-addr{COLON} { YDVAR(1, VAR_STUB_ADDR) } +stub-host{COLON} { YDVAR(1, VAR_STUB_HOST) } +stub-prime{COLON} { YDVAR(1, VAR_STUB_PRIME) } +stub-first{COLON} { YDVAR(1, VAR_STUB_FIRST) } +forward-zone{COLON} { YDVAR(0, VAR_FORWARD_ZONE) } +forward-addr{COLON} { YDVAR(1, VAR_FORWARD_ADDR) } +forward-host{COLON} { YDVAR(1, VAR_FORWARD_HOST) } +forward-first{COLON} { YDVAR(1, VAR_FORWARD_FIRST) } +do-not-query-address{COLON} { YDVAR(1, VAR_DO_NOT_QUERY_ADDRESS) } +do-not-query-localhost{COLON} { YDVAR(1, VAR_DO_NOT_QUERY_LOCALHOST) } +access-control{COLON} { YDVAR(2, VAR_ACCESS_CONTROL) } +hide-identity{COLON} { YDVAR(1, VAR_HIDE_IDENTITY) } +hide-version{COLON} { YDVAR(1, VAR_HIDE_VERSION) } +identity{COLON} { YDVAR(1, VAR_IDENTITY) } +version{COLON} { YDVAR(1, VAR_VERSION) } +module-config{COLON} { YDVAR(1, VAR_MODULE_CONF) } +dlv-anchor{COLON} { YDVAR(1, VAR_DLV_ANCHOR) } +dlv-anchor-file{COLON} { YDVAR(1, VAR_DLV_ANCHOR_FILE) } +trust-anchor-file{COLON} { YDVAR(1, VAR_TRUST_ANCHOR_FILE) } +auto-trust-anchor-file{COLON} { YDVAR(1, VAR_AUTO_TRUST_ANCHOR_FILE) } +trusted-keys-file{COLON} { YDVAR(1, VAR_TRUSTED_KEYS_FILE) } +trust-anchor{COLON} { YDVAR(1, VAR_TRUST_ANCHOR) } +val-override-date{COLON} { YDVAR(1, VAR_VAL_OVERRIDE_DATE) } +val-sig-skew-min{COLON} { YDVAR(1, VAR_VAL_SIG_SKEW_MIN) } +val-sig-skew-max{COLON} { YDVAR(1, VAR_VAL_SIG_SKEW_MAX) } +val-bogus-ttl{COLON} { YDVAR(1, VAR_BOGUS_TTL) } +val-clean-additional{COLON} { YDVAR(1, VAR_VAL_CLEAN_ADDITIONAL) } +val-permissive-mode{COLON} { YDVAR(1, VAR_VAL_PERMISSIVE_MODE) } +ignore-cd-flag{COLON} { YDVAR(1, VAR_IGNORE_CD_FLAG) } +val-log-level{COLON} { YDVAR(1, VAR_VAL_LOG_LEVEL) } +key-cache-size{COLON} { YDVAR(1, VAR_KEY_CACHE_SIZE) } +key-cache-slabs{COLON} { YDVAR(1, VAR_KEY_CACHE_SLABS) } +neg-cache-size{COLON} { YDVAR(1, VAR_NEG_CACHE_SIZE) } +val-nsec3-keysize-iterations{COLON} { + YDVAR(1, VAR_VAL_NSEC3_KEYSIZE_ITERATIONS) } +add-holddown{COLON} { YDVAR(1, VAR_ADD_HOLDDOWN) } +del-holddown{COLON} { YDVAR(1, VAR_DEL_HOLDDOWN) } +keep-missing{COLON} { YDVAR(1, VAR_KEEP_MISSING) } +use-syslog{COLON} { YDVAR(1, VAR_USE_SYSLOG) } +log-time-ascii{COLON} { YDVAR(1, VAR_LOG_TIME_ASCII) } +log-queries{COLON} { YDVAR(1, VAR_LOG_QUERIES) } +local-zone{COLON} { YDVAR(2, VAR_LOCAL_ZONE) } +local-data{COLON} { YDVAR(1, VAR_LOCAL_DATA) } +local-data-ptr{COLON} { YDVAR(1, VAR_LOCAL_DATA_PTR) } +unblock-lan-zones{COLON} { YDVAR(1, VAR_UNBLOCK_LAN_ZONES) } +statistics-interval{COLON} { YDVAR(1, VAR_STATISTICS_INTERVAL) } +statistics-cumulative{COLON} { YDVAR(1, VAR_STATISTICS_CUMULATIVE) } +extended-statistics{COLON} { YDVAR(1, VAR_EXTENDED_STATISTICS) } +remote-control{COLON} { YDVAR(0, VAR_REMOTE_CONTROL) } +control-enable{COLON} { YDVAR(1, VAR_CONTROL_ENABLE) } +control-interface{COLON} { YDVAR(1, VAR_CONTROL_INTERFACE) } +control-port{COLON} { YDVAR(1, VAR_CONTROL_PORT) } +server-key-file{COLON} { YDVAR(1, VAR_SERVER_KEY_FILE) } +server-cert-file{COLON} { YDVAR(1, VAR_SERVER_CERT_FILE) } +control-key-file{COLON} { YDVAR(1, VAR_CONTROL_KEY_FILE) } +control-cert-file{COLON} { YDVAR(1, VAR_CONTROL_CERT_FILE) } +python-script{COLON} { YDVAR(1, VAR_PYTHON_SCRIPT) } +python{COLON} { YDVAR(0, VAR_PYTHON) } +domain-insecure{COLON} { YDVAR(1, VAR_DOMAIN_INSECURE) } +minimal-responses{COLON} { YDVAR(1, VAR_MINIMAL_RESPONSES) } +rrset-roundrobin{COLON} { YDVAR(1, VAR_RRSET_ROUNDROBIN) } +max-udp-size{COLON} { YDVAR(1, VAR_MAX_UDP_SIZE) } +dns64-prefix{COLON} { YDVAR(1, VAR_DNS64_PREFIX) } +dns64-synthall{COLON} { YDVAR(1, VAR_DNS64_SYNTHALL) } +dnstap{COLON} { YDVAR(0, VAR_DNSTAP) } +dnstap-enable{COLON} { YDVAR(1, VAR_DNSTAP_ENABLE) } +dnstap-socket-path{COLON} { YDVAR(1, VAR_DNSTAP_SOCKET_PATH) } +dnstap-send-identity{COLON} { YDVAR(1, VAR_DNSTAP_SEND_IDENTITY) } +dnstap-send-version{COLON} { YDVAR(1, VAR_DNSTAP_SEND_VERSION) } +dnstap-identity{COLON} { YDVAR(1, VAR_DNSTAP_IDENTITY) } +dnstap-version{COLON} { YDVAR(1, VAR_DNSTAP_VERSION) } +dnstap-log-resolver-query-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_RESOLVER_QUERY_MESSAGES) } +dnstap-log-resolver-response-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_RESOLVER_RESPONSE_MESSAGES) } +dnstap-log-client-query-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_CLIENT_QUERY_MESSAGES) } +dnstap-log-client-response-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_CLIENT_RESPONSE_MESSAGES) } +dnstap-log-forwarder-query-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_FORWARDER_QUERY_MESSAGES) } +dnstap-log-forwarder-response-messages{COLON} { + YDVAR(1, VAR_DNSTAP_LOG_FORWARDER_RESPONSE_MESSAGES) } +<INITIAL,val>{NEWLINE} { LEXOUT(("NL\n")); cfg_parser->line++; } + + /* Quoted strings. Strip leading and ending quotes */ +<val>\" { BEGIN(quotedstring); LEXOUT(("QS ")); } +<quotedstring><<EOF>> { + yyerror("EOF inside quoted string"); + if(--num_args == 0) { BEGIN(INITIAL); } + else { BEGIN(val); } +} +<quotedstring>{DQANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); } +<quotedstring>{NEWLINE} { yyerror("newline inside quoted string, no end \""); + cfg_parser->line++; BEGIN(INITIAL); } +<quotedstring>\" { + LEXOUT(("QE ")); + if(--num_args == 0) { BEGIN(INITIAL); } + else { BEGIN(val); } + yytext[yyleng - 1] = '\0'; + yylval.str = strdup(yytext); + if(!yylval.str) + yyerror("out of memory"); + return STRING_ARG; +} + + /* Single Quoted strings. Strip leading and ending quotes */ +<val>\' { BEGIN(singlequotedstr); LEXOUT(("SQS ")); } +<singlequotedstr><<EOF>> { + yyerror("EOF inside quoted string"); + if(--num_args == 0) { BEGIN(INITIAL); } + else { BEGIN(val); } +} +<singlequotedstr>{SQANY}* { LEXOUT(("STR(%s) ", yytext)); yymore(); } +<singlequotedstr>{NEWLINE} { yyerror("newline inside quoted string, no end '"); + cfg_parser->line++; BEGIN(INITIAL); } +<singlequotedstr>\' { + LEXOUT(("SQE ")); + if(--num_args == 0) { BEGIN(INITIAL); } + else { BEGIN(val); } + yytext[yyleng - 1] = '\0'; + yylval.str = strdup(yytext); + if(!yylval.str) + yyerror("out of memory"); + return STRING_ARG; +} + + /* include: directive */ +<INITIAL,val>include{COLON} { + LEXOUT(("v(%s) ", yytext)); inc_prev = YYSTATE; BEGIN(include); } +<include><<EOF>> { + yyerror("EOF inside include directive"); + BEGIN(inc_prev); +} +<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(inc_prev); +} +<include_quoted><<EOF>> { + yyerror("EOF inside quoted string"); + BEGIN(inc_prev); +} +<include_quoted>{DQANY}* { LEXOUT(("ISTR(%s) ", yytext)); yymore(); } +<include_quoted>{NEWLINE} { yyerror("newline before \" in include name"); + cfg_parser->line++; BEGIN(inc_prev); } +<include_quoted>\" { + LEXOUT(("IQE ")); + yytext[yyleng - 1] = '\0'; + config_start_include_glob(yytext); + BEGIN(inc_prev); +} +<INITIAL,val><<EOF>> { + LEXOUT(("LEXEOF ")); + yy_set_bol(1); /* Set beginning of line, so "^" rules match. */ + if (!config_include_stack) { + 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); + } + +%% |