namedconf.c

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/*
 * Copyright (C) 2004-2006  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 2002, 2003  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: namedconf.c,v 1.30.18.38 2006/05/03 01:46:40 marka Exp $ */

/*! \file */

#include <config.h>

#include <string.h>

#include <isc/lex.h>
#include <isc/result.h>
#include <isc/string.h>
#include <isc/util.h>

#include <isccfg/cfg.h>
#include <isccfg/grammar.h>
#include <isccfg/log.h>

#define TOKEN_STRING(pctx) (pctx->token.value.as_textregion.base)

/*% Check a return value. */
#define CHECK(op) 						\
     	do { result = (op); 					\
		if (result != ISC_R_SUCCESS) goto cleanup; 	\
	} while (0)

/*% Clean up a configuration object if non-NULL. */
#define CLEANUP_OBJ(obj) \
	do { if ((obj) != NULL) cfg_obj_destroy(pctx, &(obj)); } while (0)


/*%
 * Forward declarations of static functions.
 */

static isc_result_t
parse_enum_or_other(cfg_parser_t *pctx, const cfg_type_t *enumtype,
		    const cfg_type_t *othertype, cfg_obj_t **ret);

static isc_result_t
parse_keyvalue(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

static isc_result_t
parse_optional_keyvalue(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

static void
print_keyvalue(cfg_printer_t *pctx, const cfg_obj_t *obj);

static void
doc_keyvalue(cfg_printer_t *pctx, const cfg_type_t *type);

static void
doc_optional_keyvalue(cfg_printer_t *pctx, const cfg_type_t *type);

static cfg_type_t cfg_type_acl;
static cfg_type_t cfg_type_addrmatchelt;
static cfg_type_t cfg_type_bracketed_aml;
static cfg_type_t cfg_type_bracketed_namesockaddrkeylist;
static cfg_type_t cfg_type_bracketed_sockaddrlist;
static cfg_type_t cfg_type_bracketed_sockaddrnameportlist;
static cfg_type_t cfg_type_controls;
static cfg_type_t cfg_type_controls_sockaddr;
static cfg_type_t cfg_type_destinationlist;
static cfg_type_t cfg_type_dialuptype;
static cfg_type_t cfg_type_ixfrdifftype;
static cfg_type_t cfg_type_key;
static cfg_type_t cfg_type_logfile;
static cfg_type_t cfg_type_logging;
static cfg_type_t cfg_type_logseverity;
static cfg_type_t cfg_type_lwres;
static cfg_type_t cfg_type_masterselement;
static cfg_type_t cfg_type_nameportiplist;
static cfg_type_t cfg_type_negated;
static cfg_type_t cfg_type_notifytype;
static cfg_type_t cfg_type_optional_class;
static cfg_type_t cfg_type_optional_facility;
static cfg_type_t cfg_type_optional_facility;
static cfg_type_t cfg_type_optional_keyref;
static cfg_type_t cfg_type_optional_port;
static cfg_type_t cfg_type_options;
static cfg_type_t cfg_type_portiplist;
static cfg_type_t cfg_type_querysource4;
static cfg_type_t cfg_type_querysource6;
static cfg_type_t cfg_type_querysource;
static cfg_type_t cfg_type_server;
static cfg_type_t cfg_type_server_key_kludge;
static cfg_type_t cfg_type_size;
static cfg_type_t cfg_type_sizenodefault;
static cfg_type_t cfg_type_sockaddr4wild;
static cfg_type_t cfg_type_sockaddr6wild;
static cfg_type_t cfg_type_view;
static cfg_type_t cfg_type_viewopts;
static cfg_type_t cfg_type_zone;
static cfg_type_t cfg_type_zoneopts;
static cfg_type_t cfg_type_dynamically_loadable_zones;
static cfg_type_t cfg_type_dynamically_loadable_zones_opts;

/*
 * Clauses that can be found in a 'dynamically loadable zones' statement
 */
static cfg_clausedef_t
dynamically_loadable_zones_clauses[] = {
	{ "database", &cfg_type_astring, 0 },
	{ NULL, NULL, 0 }
};

/*
 * A dynamically loadable zones statement.
 */
static cfg_tuplefielddef_t dynamically_loadable_zones_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "options", &cfg_type_dynamically_loadable_zones_opts, 0 },
	{ NULL, NULL, 0 }
};

static cfg_type_t cfg_type_dynamically_loadable_zones = {
	"dlz", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple,
	&cfg_rep_tuple,
	dynamically_loadable_zones_fields
	};


/*% tkey-dhkey */

static cfg_tuplefielddef_t tkey_dhkey_fields[] = {
	{ "name", &cfg_type_qstring, 0 },
	{ "keyid", &cfg_type_uint32, 0 },
	{ NULL, NULL, 0 }
};

static cfg_type_t cfg_type_tkey_dhkey = {
	"tkey-dhkey", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	tkey_dhkey_fields
};

/*% listen-on */

static cfg_tuplefielddef_t listenon_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "acl", &cfg_type_bracketed_aml, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_listenon = {
	"listenon", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, listenon_fields };

/*% acl */

static cfg_tuplefielddef_t acl_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "value", &cfg_type_bracketed_aml, 0 },
	{ NULL, NULL, 0 }
};

static cfg_type_t cfg_type_acl = {
	"acl", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, acl_fields };

/*% masters */
static cfg_tuplefielddef_t masters_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_namesockaddrkeylist, 0 },
	{ NULL, NULL, 0 }
};

static cfg_type_t cfg_type_masters = {
	"masters", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, masters_fields };

/*%
 * "sockaddrkeylist", a list of socket addresses with optional keys
 * and an optional default port, as used in the masters option.
 * E.g.,
 *   "port 1234 { mymasters; 10.0.0.1 key foo; 1::2 port 69; }"
 */

static cfg_tuplefielddef_t namesockaddrkey_fields[] = {
	{ "masterselement", &cfg_type_masterselement, 0 },
	{ "key", &cfg_type_optional_keyref, 0 },
	{ NULL, NULL, 0 },
};

static cfg_type_t cfg_type_namesockaddrkey = {
	"namesockaddrkey", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	namesockaddrkey_fields
};

static cfg_type_t cfg_type_bracketed_namesockaddrkeylist = {
	"bracketed_namesockaddrkeylist", cfg_parse_bracketed_list,
	cfg_print_bracketed_list, cfg_doc_bracketed_list, &cfg_rep_list, &cfg_type_namesockaddrkey
};

static cfg_tuplefielddef_t namesockaddrkeylist_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_namesockaddrkeylist, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_namesockaddrkeylist = {
	"sockaddrkeylist", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	namesockaddrkeylist_fields
};

/*%
 * A list of socket addresses with an optional default port,
 * as used in the also-notify option.  E.g.,
 * "port 1234 { 10.0.0.1; 1::2 port 69; }"
 */
static cfg_tuplefielddef_t portiplist_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_sockaddrlist, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_portiplist = {
	"portiplist", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	portiplist_fields
};

/*%
 * A public key, as in the "pubkey" statement.
 */
static cfg_tuplefielddef_t pubkey_fields[] = {
	{ "flags", &cfg_type_uint32, 0 },
	{ "protocol", &cfg_type_uint32, 0 },
	{ "algorithm", &cfg_type_uint32, 0 },
	{ "key", &cfg_type_qstring, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_pubkey = {
	"pubkey", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, pubkey_fields };

/*%
 * A list of RR types, used in grant statements.
 * Note that the old parser allows quotes around the RR type names.
 */
static cfg_type_t cfg_type_rrtypelist = {
 	"rrtypelist", cfg_parse_spacelist, cfg_print_spacelist, cfg_doc_terminal,
	&cfg_rep_list, &cfg_type_astring
};

static const char *mode_enums[] = { "grant", "deny", NULL };
static cfg_type_t cfg_type_mode = {
	"mode", cfg_parse_enum, cfg_print_ustring, cfg_doc_enum, &cfg_rep_string,
	&mode_enums
};

static const char *matchtype_enums[] = {
	"name", "subdomain", "wildcard", "self", "selfsub", "selfwild", NULL };
static cfg_type_t cfg_type_matchtype = {
	"matchtype", cfg_parse_enum, cfg_print_ustring, cfg_doc_enum, &cfg_rep_string,
	&matchtype_enums
};

/*%
 * A grant statement, used in the update policy.
 */
static cfg_tuplefielddef_t grant_fields[] = {
	{ "mode", &cfg_type_mode, 0 },
	{ "identity", &cfg_type_astring, 0 }, /* domain name */ 
	{ "matchtype", &cfg_type_matchtype, 0 },
	{ "name", &cfg_type_astring, 0 }, /* domain name */
	{ "types", &cfg_type_rrtypelist, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_grant = {
	"grant", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, grant_fields };

static cfg_type_t cfg_type_updatepolicy = {
	"update_policy", cfg_parse_bracketed_list, cfg_print_bracketed_list, cfg_doc_bracketed_list,
	&cfg_rep_list, &cfg_type_grant
};

/*%
 * A view statement.
 */
static cfg_tuplefielddef_t view_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "class", &cfg_type_optional_class, 0 },
	{ "options", &cfg_type_viewopts, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_view = {
	"view", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, view_fields };

/*%
 * A zone statement.
 */
static cfg_tuplefielddef_t zone_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "class", &cfg_type_optional_class, 0 },
	{ "options", &cfg_type_zoneopts, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_zone = {
	"zone", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, zone_fields };

/*%
 * A "category" clause in the "logging" statement.
 */
static cfg_tuplefielddef_t category_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "destinations", &cfg_type_destinationlist,0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_category = {
	"category", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple, category_fields };


/*%
 * A trusted key, as used in the "trusted-keys" statement.
 */
static cfg_tuplefielddef_t trustedkey_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "flags", &cfg_type_uint32, 0 },
	{ "protocol", &cfg_type_uint32, 0 },
	{ "algorithm", &cfg_type_uint32, 0 },
	{ "key", &cfg_type_qstring, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_trustedkey = {
	"trustedkey", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	trustedkey_fields
};

static keyword_type_t wild_class_kw = { "class", &cfg_type_ustring };

static cfg_type_t cfg_type_optional_wild_class = {
	"optional_wild_class", parse_optional_keyvalue, print_keyvalue,
	doc_optional_keyvalue, &cfg_rep_string, &wild_class_kw
};

static keyword_type_t wild_type_kw = { "type", &cfg_type_ustring };

static cfg_type_t cfg_type_optional_wild_type = {
	"optional_wild_type", parse_optional_keyvalue,
	print_keyvalue, doc_optional_keyvalue, &cfg_rep_string, &wild_type_kw
};

static keyword_type_t wild_name_kw = { "name", &cfg_type_qstring };

static cfg_type_t cfg_type_optional_wild_name = {
	"optional_wild_name", parse_optional_keyvalue,
	print_keyvalue, doc_optional_keyvalue, &cfg_rep_string, &wild_name_kw
};

/*%
 * An rrset ordering element.
 */
static cfg_tuplefielddef_t rrsetorderingelement_fields[] = {
	{ "class", &cfg_type_optional_wild_class, 0 },
	{ "type", &cfg_type_optional_wild_type, 0 },
	{ "name", &cfg_type_optional_wild_name, 0 },
	{ "order", &cfg_type_ustring, 0 }, /* must be literal "order" */ 
	{ "ordering", &cfg_type_ustring, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_rrsetorderingelement = {
	"rrsetorderingelement", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	rrsetorderingelement_fields
};

/*%
 * A global or view "check-names" option.  Note that the zone
 * "check-names" option has a different syntax.
 */

static const char *checktype_enums[] = { "master", "slave", "response", NULL };
static cfg_type_t cfg_type_checktype = {
	"checktype", cfg_parse_enum, cfg_print_ustring, cfg_doc_enum,
	&cfg_rep_string, &checktype_enums
};

static const char *checkmode_enums[] = { "fail", "warn", "ignore", NULL };
static cfg_type_t cfg_type_checkmode = {
	"checkmode", cfg_parse_enum, cfg_print_ustring, cfg_doc_enum,
	&cfg_rep_string, &checkmode_enums
};

static cfg_tuplefielddef_t checknames_fields[] = {
	{ "type", &cfg_type_checktype, 0 },
	{ "mode", &cfg_type_checkmode, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_checknames = {
	"checknames", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	checknames_fields
};

static cfg_type_t cfg_type_bracketed_sockaddrlist = {
	"bracketed_sockaddrlist", cfg_parse_bracketed_list, cfg_print_bracketed_list, cfg_doc_bracketed_list,
	&cfg_rep_list, &cfg_type_sockaddr
};

static cfg_type_t cfg_type_rrsetorder = {
	"rrsetorder", cfg_parse_bracketed_list, cfg_print_bracketed_list, cfg_doc_bracketed_list,
	&cfg_rep_list, &cfg_type_rrsetorderingelement
};