parser.c 97.7 KB
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/*
 * Copyright (C) 2000, 2001  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 INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM 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.
 */

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/* $Id: parser.c,v 1.62 2001/07/06 20:34:12 gson Exp $ */
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#include <config.h>

#include <isc/buffer.h>
#include <isc/dir.h>
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#include <isc/formatcheck.h>
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#include <isc/lex.h>
#include <isc/log.h>
#include <isc/mem.h>
#include <isc/net.h>
#include <isc/netaddr.h>
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#include <isc/print.h>
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#include <isc/string.h>
#include <isc/sockaddr.h>
#include <isc/util.h>
#include <isc/symtab.h>

#include <isccfg/cfg.h>
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#include <isccfg/log.h>
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/* Shorthand */
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#define CAT CFG_LOGCATEGORY_CONFIG
#define MOD CFG_LOGMODULE_PARSER
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#define QSTRING (ISC_LEXOPT_QSTRING | ISC_LEXOPT_QSTRINGMULTILINE)

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/*
 * Pass one of these flags to parser_error() to include the
 * token text in log message.
 */
#define LOG_NEAR    0x00000001	/* Say "near <token>" */
#define LOG_BEFORE  0x00000002	/* Say "before <token>" */
#define LOG_NOPREP  0x00000004	/* Say just "<token>" */

#define MAP_SYM 1 	/* Unique type for isc_symtab */

/* Clause may occur multiple times (e.g., "zone") */
#define CFG_CLAUSEFLAG_MULTI 		0x00000001
/* Clause is obsolete */
#define CFG_CLAUSEFLAG_OBSOLETE 	0x00000002
/* Clause is not implemented, and may never be */
#define CFG_CLAUSEFLAG_NOTIMP	 	0x00000004
/* Clause is not implemented yet */
#define CFG_CLAUSEFLAG_NYI 		0x00000008
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/* Default value has changed since earlier release */
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#define CFG_CLAUSEFLAG_NEWDEFAULT	0x00000010
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/*
 * Clause needs to be interpreted during parsing
 * by calling a callback function, like the
 * "directory" option.
 */
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#define CFG_CLAUSEFLAG_CALLBACK		0x00000020
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/*
 * Flags defining whether to accept certain types of network addresses.
 */
#define V4OK 		0x00000001
#define V4PREFIXOK 	0x00000002
#define V6OK 		0x00000004
#define WILDOK		0x00000008

/* 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)


typedef struct cfg_clausedef cfg_clausedef_t;
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typedef struct cfg_tuplefielddef cfg_tuplefielddef_t;
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typedef struct cfg_printer cfg_printer_t;
typedef ISC_LIST(cfg_listelt_t) cfg_list_t;
typedef struct cfg_map cfg_map_t;
typedef struct cfg_rep cfg_rep_t;

/*
 * Function types for configuration object methods
 */

typedef isc_result_t (*cfg_parsefunc_t)(cfg_parser_t *, cfg_type_t *type,
					cfg_obj_t **);
typedef void	     (*cfg_printfunc_t)(cfg_printer_t *, cfg_obj_t *);
typedef void	     (*cfg_freefunc_t)(cfg_parser_t *, cfg_obj_t *);

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/*
 * Structure definitions
 */

/* The parser object. */
struct cfg_parser {
	isc_mem_t *	mctx;
	isc_log_t *	lctx;
	isc_lex_t *	lexer;
	unsigned int    errors;
	unsigned int    warnings;
	isc_token_t     token;

	/* We are at the end of all input. */
	isc_boolean_t	seen_eof;

	/* The current token has been pushed back. */
	isc_boolean_t	ungotten;

	/*
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	 * The stack of currently active files, represented
	 * as a configuration list of configuration strings.
	 * The head is the top-level file, subsequent elements 
	 * (if any) are the nested include files, and the 
	 * last element is the file currently being parsed.
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	 */
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	cfg_obj_t *	open_files;

	/*
	 * Names of files that we have parsed and closed
	 * and were previously on the open_file list.
	 * We keep these objects around after closing
	 * the files because the file names may still be
	 * referenced from other configuration objects
	 * for use in reporting semantic errors after
	 * parsing is complete.
	 */
	cfg_obj_t *	closed_files;
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	/*
	 * Current line number.  We maintain our own
	 * copy of this so that it is available even
	 * when a file has just been closed.
	 */
	unsigned int	line;
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	cfg_parsecallback_t callback;
	void *callbackarg;
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};

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/*
 * A configuration printer object.  This is an abstract
 * interface to a destination to which text can be printed
 * by calling the function 'f'.
 */
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struct cfg_printer {
	void (*f)(void *closure, const char *text, int textlen);
	void *closure;
	int indent;
};

/* A clause definition. */

struct cfg_clausedef {
	const char      *name;
	cfg_type_t      *type;
	unsigned int	flags;
};

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/* A tuple field definition. */

struct cfg_tuplefielddef {
	const char      *name;
	cfg_type_t      *type;
	unsigned int	flags;
};

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/* A configuration object type definition. */
struct cfg_type {
	const char *name;	/* For debugging purposes only */
	cfg_parsefunc_t  parse;
	cfg_printfunc_t  print;
	cfg_rep_t *	 rep;	/* Data representation */
	void *		 of;	/* For meta-types */
};

/* A keyword-type definition, for things like "port <integer>". */
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typedef struct {
	const char *name;
	cfg_type_t *type;
} keyword_type_t;

struct cfg_map {
	cfg_obj_t	 *id; /* Used for 'named maps' like keys, zones, &c */
	cfg_clausedef_t  **clausesets; /* The clauses that can occur in
					  this map; used for printing */
	isc_symtab_t     *symtab;
};

typedef struct cfg_netprefix cfg_netprefix_t;

struct cfg_netprefix {
	isc_netaddr_t address; /* IP4/IP6 */
	unsigned int prefixlen;
};

/*
 * A configuration data representation.
 */
struct cfg_rep {
	const char *	name;	/* For debugging only */
	cfg_freefunc_t 	free;	/* How to free this kind of data. */
};

/*
 * A configuration object.  This is the main building block
 * of the configuration parse tree.
 */

struct cfg_obj {
	cfg_type_t *	 type;
	union {
		isc_uint32_t  	uint32;
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		isc_uint64_t  	uint64;
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		isc_textregion_t string; /* null terminated, too */
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		isc_boolean_t 	boolean;
		cfg_map_t	map;
		cfg_list_t	list;
		cfg_obj_t **	tuple;
		isc_sockaddr_t	sockaddr;
		cfg_netprefix_t netprefix;
	}               value;
	char *		file;
	unsigned int    line;
};


/* A list element. */
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struct cfg_listelt {
	cfg_obj_t               *obj;
	ISC_LINK(cfg_listelt_t)  link;
};

/*
 * Forward declarations of static functions.
 */

static isc_result_t
create_cfgobj(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **objp);

static isc_result_t
create_list(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **objp);

static isc_result_t
create_listelt(cfg_parser_t *pctx, cfg_listelt_t **eltp);

static void
free_list(cfg_parser_t *pctx, cfg_obj_t *obj);

static isc_result_t
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create_string(cfg_parser_t *pctx, const char *contents, cfg_type_t *type,
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	      cfg_obj_t **ret);

static void
free_string(cfg_parser_t *pctx, cfg_obj_t *obj);

static isc_result_t
create_map(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **objp);

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static isc_result_t
create_tuple(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **objp);

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static void
free_map(cfg_parser_t *pctx, cfg_obj_t *obj);

static isc_result_t
get_addr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na);

static void
print(cfg_printer_t *pctx, const char *text, int len);

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static void
print_void(cfg_printer_t *pctx, cfg_obj_t *obj);

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

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

static void
print_mapbody(cfg_printer_t *pctx, cfg_obj_t *obj);

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

static void
print_map(cfg_printer_t *pctx, cfg_obj_t *obj);

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

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

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

static void
print_list(cfg_printer_t *pctx, cfg_obj_t *obj);

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

static void
print_tuple(cfg_printer_t *pctx, cfg_obj_t *obj);

static void
free_tuple(cfg_parser_t *pctx, cfg_obj_t *obj);

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

static void
print_spacelist(cfg_printer_t *pctx, cfg_obj_t *obj);

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static void
print_sockaddr(cfg_printer_t *pctx, cfg_obj_t *obj);

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

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

static void
print_bracketed_list(cfg_printer_t *pctx, cfg_obj_t *obj);

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

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

static void
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print_keyvalue(cfg_printer_t *pctx, cfg_obj_t *obj);
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static isc_result_t
parse_symtab_elt(cfg_parser_t *pctx, const char *name,
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		 cfg_type_t *elttype, isc_symtab_t *symtab,
		 isc_boolean_t callback);
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static void
free_noop(cfg_parser_t *pctx, cfg_obj_t *obj);

static isc_result_t
cfg_gettoken(cfg_parser_t *pctx, int options);

static void
cfg_ungettoken(cfg_parser_t *pctx);

static isc_result_t
cfg_peektoken(cfg_parser_t *pctx, int options);

static isc_result_t
cfg_getstringtoken(cfg_parser_t *pctx);

static void
parser_error(cfg_parser_t *pctx, unsigned int flags,
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	     const char *fmt, ...) ISC_FORMAT_PRINTF(3, 4);

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static void
parser_warning(cfg_parser_t *pctx, unsigned int flags,
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	       const char *fmt, ...) ISC_FORMAT_PRINTF(3, 4);

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static void
parser_complain(cfg_parser_t *pctx, isc_boolean_t is_warning,
		unsigned int flags, const char *format, va_list args);

static void
print_uint32(cfg_printer_t *pctx, cfg_obj_t *obj);

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static void
print_ustring(cfg_printer_t *pctx, cfg_obj_t *obj);

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

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/*
 * Data representations.  These correspond to members of the
 * "value" union in struct cfg_obj (except "void", which does
 * not need a union member).
 */
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cfg_rep_t cfg_rep_uint32 = { "uint32", free_noop };
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cfg_rep_t cfg_rep_uint64 = { "uint64", free_noop };
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cfg_rep_t cfg_rep_string = { "string", free_string };
cfg_rep_t cfg_rep_boolean = { "boolean", free_noop };
cfg_rep_t cfg_rep_map = { "map", free_map };
cfg_rep_t cfg_rep_list = { "list", free_list };
cfg_rep_t cfg_rep_tuple = { "tuple", free_tuple };
cfg_rep_t cfg_rep_sockaddr = { "sockaddr", free_noop };
cfg_rep_t cfg_rep_netprefix = { "netprefix", free_noop };
cfg_rep_t cfg_rep_void = { "void", free_noop };

/*
 * Forward declarations of configuration type definitions.
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 * Additional types are declared publicly in cfg.h.
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 */

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static cfg_type_t cfg_type_boolean;
static cfg_type_t cfg_type_uint32;
static cfg_type_t cfg_type_qstring;
static cfg_type_t cfg_type_astring;
static cfg_type_t cfg_type_ustring;
static cfg_type_t cfg_type_optional_port;
static cfg_type_t cfg_type_bracketed_aml;
static cfg_type_t cfg_type_acl;
static cfg_type_t cfg_type_portiplist;
static cfg_type_t cfg_type_bracketed_sockaddrlist;
static cfg_type_t cfg_type_sockaddr;
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static cfg_type_t cfg_type_netaddr;
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static cfg_type_t cfg_type_optional_keyref;
static cfg_type_t cfg_type_options;
static cfg_type_t cfg_type_view;
static cfg_type_t cfg_type_viewopts;
static cfg_type_t cfg_type_key;
static cfg_type_t cfg_type_server;
static cfg_type_t cfg_type_controls;
static cfg_type_t cfg_type_bracketed_sockaddrkeylist;
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_sockaddr4wild;
static cfg_type_t cfg_type_sockaddr6wild;
static cfg_type_t cfg_type_sockaddr;
static cfg_type_t cfg_type_netprefix;
static cfg_type_t cfg_type_zone;
static cfg_type_t cfg_type_zoneopts;
static cfg_type_t cfg_type_logging;
static cfg_type_t cfg_type_optional_facility;
static cfg_type_t cfg_type_void;
static cfg_type_t cfg_type_optional_class;
static cfg_type_t cfg_type_destinationlist;
static cfg_type_t cfg_type_size;
static cfg_type_t cfg_type_negated;
static cfg_type_t cfg_type_addrmatchelt;
static cfg_type_t cfg_type_unsupported;
static cfg_type_t cfg_type_token;
static cfg_type_t cfg_type_server_key_kludge;
static cfg_type_t cfg_type_optional_facility;
static cfg_type_t cfg_type_logseverity;
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static cfg_type_t cfg_type_logfile;
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static cfg_type_t cfg_type_lwres;
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static cfg_type_t cfg_type_controls_sockaddr;
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static cfg_type_t cfg_type_notifytype;
static cfg_type_t cfg_type_dialuptype;
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/*
 * Configuration type definitions.
 */

/* tkey-dhkey */

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

static cfg_type_t cfg_type_tkey_dhkey = {
	"tkey-dhkey", parse_tuple, print_tuple, &cfg_rep_tuple,
	tkey_dhkey_fields
};

/* listen-on */

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

/* acl */

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

static cfg_type_t cfg_type_acl = {
	"acl", parse_tuple, print_tuple, &cfg_rep_tuple, acl_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 { 10.0.0.1 key foo; 1::2 port 69; }"
 */

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static cfg_tuplefielddef_t sockaddrkey_fields[] = {
	{ "sockaddr", &cfg_type_sockaddr, 0 },
	{ "key", &cfg_type_optional_keyref, 0 },
	{ NULL, NULL, 0 },
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};

static cfg_type_t cfg_type_sockaddrkey = {
	"sockaddrkey", parse_tuple, print_tuple, &cfg_rep_tuple,
	sockaddrkey_fields
};

static cfg_type_t cfg_type_bracketed_sockaddrkeylist = {
	"bracketed_sockaddrkeylist", parse_bracketed_list,
	print_bracketed_list, &cfg_rep_list, &cfg_type_sockaddrkey
};

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static cfg_tuplefielddef_t sockaddrkeylist_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_sockaddrkeylist, 0 },
	{ NULL, NULL, 0 }
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};
static cfg_type_t cfg_type_sockaddrkeylist = {
	"sockaddrkeylist", parse_tuple, print_tuple, &cfg_rep_tuple,
	sockaddrkeylist_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; }"
 */
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static cfg_tuplefielddef_t portiplist_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_sockaddrlist, 0 },
	{ NULL, NULL, 0 }
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};
static cfg_type_t cfg_type_portiplist = {
	"portiplist", parse_tuple, print_tuple, &cfg_rep_tuple,
	portiplist_fields
};

/*
 * A public key, as in the "pubkey" statement.
 */
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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 }
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};
static cfg_type_t cfg_type_pubkey = {
	"pubkey", parse_tuple, print_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", parse_spacelist, print_spacelist, &cfg_rep_list,
	&cfg_type_astring
};

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

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static const char *matchtype_enums[] = {
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	"name", "subdomain", "wildcard", "self", NULL };
static cfg_type_t cfg_type_matchtype = {
	"matchtype", parse_enum, print_ustring, &cfg_rep_string,
	&matchtype_enums
};

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

static cfg_type_t cfg_type_updatepolicy = {
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	"update_policy", parse_bracketed_list, print_bracketed_list,
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	&cfg_rep_list, &cfg_type_grant
};

/*
 * A view statement.
 */
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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 }
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};
static cfg_type_t cfg_type_view = {
	"view", parse_tuple, print_tuple, &cfg_rep_tuple, view_fields };

/*
 * A zone statement.
 */
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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 }
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};
static cfg_type_t cfg_type_zone = {
	"zone", parse_tuple, print_tuple, &cfg_rep_tuple, zone_fields };

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


/*
 * A trusted key, as used in the "trusted-keys" statement.
 */
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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 }
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};
static cfg_type_t cfg_type_trustedkey = {
	"trustedkey", parse_tuple, print_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,
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	print_keyvalue, &cfg_rep_string, &wild_class_kw
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};

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,
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	print_keyvalue, &cfg_rep_string, &wild_type_kw
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};

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,
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	print_keyvalue, &cfg_rep_string, &wild_name_kw
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};

/*
 * An rrset ordering element.
 */
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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 }
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};
static cfg_type_t cfg_type_rrsetorderingelement = {
	"rrsetorderingelement", parse_tuple, print_tuple, &cfg_rep_tuple,
	rrsetorderingelement_fields
};

/*
 * A global or view "check-names" option.  Note that the zone
 * "check-names" option has a different syntax.
 */
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static cfg_tuplefielddef_t checknames_fields[] = {
	{ "type", &cfg_type_ustring, 0 },
	{ "mode", &cfg_type_ustring, 0 },
	{ NULL, NULL, 0 }
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};
static cfg_type_t cfg_type_checknames = {
	"checknames", parse_tuple, print_tuple, &cfg_rep_tuple,
	checknames_fields
};

static cfg_type_t cfg_type_bracketed_sockaddrlist = {
	"bracketed_sockaddrlist", parse_bracketed_list, print_bracketed_list,
	&cfg_rep_list, &cfg_type_sockaddr
};

static cfg_type_t cfg_type_rrsetorder = {
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	"rrsetorder", parse_bracketed_list, print_bracketed_list,
	&cfg_rep_list, &cfg_type_rrsetorderingelement
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};

static keyword_type_t port_kw = { "port", &cfg_type_uint32 };

static cfg_type_t cfg_type_optional_port = {
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	"optional_port", parse_optional_keyvalue, print_keyvalue,
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	&cfg_rep_uint32, &port_kw
};

/* A list of keys, as in the "key" clause of the controls statement. */
static cfg_type_t cfg_type_keylist = {
	"keylist", parse_bracketed_list, print_bracketed_list, &cfg_rep_list,
	&cfg_type_astring
};

static cfg_type_t cfg_type_trustedkeys = {
	"trusted-keys", parse_bracketed_list, print_bracketed_list, &cfg_rep_list,
	&cfg_type_trustedkey
};

/*
 * An implicit list.  These are formed by clauses that occur multiple times.
 */
static cfg_type_t cfg_type_implicitlist = {
	"implicitlist", NULL, print_list, &cfg_rep_list, NULL };

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static const char *forwardtype_enums[] = { "first", "only", NULL };
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static cfg_type_t cfg_type_forwardtype = {
	"forwardtype", parse_enum, print_ustring, &cfg_rep_string,
	&forwardtype_enums
};

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static const char *zonetype_enums[] = {
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	"master", "slave", "stub", "hint", "forward", NULL };
static cfg_type_t cfg_type_zonetype = {
	"zonetype", parse_enum, print_ustring, &cfg_rep_string,
	&zonetype_enums
};

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static const char *loglevel_enums[] = {
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	"critical", "error", "warning", "notice", "info", "dynamic", NULL };
static cfg_type_t cfg_type_loglevel = {
	"loglevel", parse_enum, print_ustring, &cfg_rep_string,
	&loglevel_enums
};

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static const char *transferformat_enums[] = {
	"many-answers", "one-answer", NULL };
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static cfg_type_t cfg_type_transferformat = {
	"transferformat", parse_enum, print_ustring, &cfg_rep_string,
	&transferformat_enums
};

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/*
 * Clauses that can be found within the top level of the named.conf
 * file only.
 */
static cfg_clausedef_t
namedconf_clauses[] = {
	{ "options", &cfg_type_options, 0 },
	{ "controls", &cfg_type_controls, CFG_CLAUSEFLAG_MULTI },
	{ "acl", &cfg_type_acl, CFG_CLAUSEFLAG_MULTI },
	{ "logging", &cfg_type_logging, 0 },
	{ "view", &cfg_type_view, CFG_CLAUSEFLAG_MULTI },
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	{ "lwres", &cfg_type_lwres, CFG_CLAUSEFLAG_MULTI },
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	{ NULL, NULL, 0 }
};

/*
 * Clauses that can occur at the top level or in the view
 * statement, but not in the options block.
 */
static cfg_clausedef_t
namedconf_or_view_clauses[] = {
	{ "key", &cfg_type_key, CFG_CLAUSEFLAG_MULTI },
	{ "zone", &cfg_type_zone, CFG_CLAUSEFLAG_MULTI },
	{ "server", &cfg_type_server, CFG_CLAUSEFLAG_MULTI },
	{ "trusted-keys", &cfg_type_trustedkeys, CFG_CLAUSEFLAG_MULTI },
	{ NULL, NULL, 0 }
};

/*
 * Clauses that can be found within the 'options' statement.
 */
static cfg_clausedef_t
options_clauses[] = {
	{ "blackhole", &cfg_type_bracketed_aml, 0 },
	{ "coresize", &cfg_type_size, 0 },
	{ "datasize", &cfg_type_size, 0 },
	{ "deallocate-on-exit", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
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	{ "directory", &cfg_type_qstring, CFG_CLAUSEFLAG_CALLBACK },
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	{ "dump-file", &cfg_type_qstring, 0 },
	{ "fake-iquery", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "files", &cfg_type_size, 0 },
	{ "has-old-clients", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "heartbeat-interval", &cfg_type_uint32, 0 },
	{ "host-statistics", &cfg_type_boolean, 0 },
	{ "interface-interval", &cfg_type_uint32, 0 },
	{ "listen-on", &cfg_type_listenon, CFG_CLAUSEFLAG_MULTI },
	{ "listen-on-v6", &cfg_type_listenon, CFG_CLAUSEFLAG_MULTI },
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	{ "match-mapped-addresses", &cfg_type_boolean, 0 },
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	{ "memstatistics-file", &cfg_type_qstring, 0 },
	{ "multiple-cnames", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "named-xfer", &cfg_type_qstring, CFG_CLAUSEFLAG_OBSOLETE },
	{ "pid-file", &cfg_type_qstring, 0 },
	{ "port", &cfg_type_uint32, 0 },
	{ "random-device", &cfg_type_qstring, 0 },
	{ "recursive-clients", &cfg_type_uint32, 0 },
	{ "rrset-order", &cfg_type_rrsetorder, 0 },
	{ "serial-queries", &cfg_type_uint32, CFG_CLAUSEFLAG_OBSOLETE },
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	{ "serial-query-rate", &cfg_type_uint32, 0 },
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	{ "stacksize", &cfg_type_size, 0 },
	{ "statistics-file", &cfg_type_qstring, 0 },
	{ "statistics-interval", &cfg_type_uint32, CFG_CLAUSEFLAG_NYI },
	{ "tcp-clients", &cfg_type_uint32, 0 },
	{ "tkey-dhkey", &cfg_type_tkey_dhkey, 0 },
	{ "tkey-gssapi-credential", &cfg_type_qstring, 0 },
	{ "tkey-domain", &cfg_type_qstring, 0 },
	{ "transfers-per-ns", &cfg_type_uint32, 0 },
	{ "transfers-in", &cfg_type_uint32, 0 },
	{ "transfers-out", &cfg_type_uint32, 0 },
	{ "treat-cr-as-space", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "use-id-pool", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "use-ixfr", &cfg_type_boolean, 0 },
	{ "version", &cfg_type_qstring, 0 },
	{ NULL, NULL, 0 }
};

/*
 * Clauses that can be found within the 'view' statement,
 * with defaults in the 'options' statement.
 */

static cfg_clausedef_t
view_clauses[] = {
	{ "allow-notify", &cfg_type_bracketed_aml, 0 },
	{ "allow-update-forwarding", &cfg_type_bracketed_aml, 0 },
	{ "allow-recursion", &cfg_type_bracketed_aml, 0 },
	{ "allow-v6-synthesis", &cfg_type_bracketed_aml, 0 },
	{ "sortlist", &cfg_type_bracketed_aml, 0 },
	{ "topology", &cfg_type_bracketed_aml, CFG_CLAUSEFLAG_NOTIMP },
	{ "auth-nxdomain", &cfg_type_boolean, CFG_CLAUSEFLAG_NEWDEFAULT },
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	{ "minimal-responses", &cfg_type_boolean, 0 },
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	{ "recursion", &cfg_type_boolean, 0 },
	{ "provide-ixfr", &cfg_type_boolean, 0 },
	{ "request-ixfr", &cfg_type_boolean, 0 },
	{ "fetch-glue", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
	{ "rfc2308-type1", &cfg_type_boolean, CFG_CLAUSEFLAG_NYI },
	{ "additional-from-auth", &cfg_type_boolean, 0 },
	{ "additional-from-cache", &cfg_type_boolean, 0 },
	/*
	 * Note that the query-source option syntax is different
	 * from the other -source options.
	 */
	{ "query-source", &cfg_type_querysource4, 0 },
	{ "query-source-v6", &cfg_type_querysource6, 0 },
	{ "notify-source", &cfg_type_sockaddr4wild, 0 },
	{ "notify-source-v6", &cfg_type_sockaddr6wild, 0 },
	{ "cleaning-interval", &cfg_type_uint32, 0 },
	{ "min-roots", &cfg_type_uint32, CFG_CLAUSEFLAG_NOTIMP },
	{ "lame-ttl", &cfg_type_uint32, 0 },
	{ "max-ncache-ttl", &cfg_type_uint32, 0 },
	{ "max-cache-ttl", &cfg_type_uint32, 0 },
	{ "transfer-format", &cfg_type_ustring, 0 },
	/*
	 * XXX "default" should not be accepted as a size in
	 * max-cache-size.
	 */
	{ "max-cache-size", &cfg_type_size, 0 },
	{ "check-names", &cfg_type_checknames,
	  CFG_CLAUSEFLAG_MULTI | CFG_CLAUSEFLAG_NOTIMP },
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	{ "cache-file", &cfg_type_qstring, 0 },
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	{ NULL, NULL, 0 }
};

/*
 * Clauses that can be found within the 'view' statement only.
 */
static cfg_clausedef_t
view_only_clauses[] = {
	{ "match-clients", &cfg_type_bracketed_aml, 0 },
	{ NULL, NULL, 0 }
};

/*
 * Clauses that can be found in a 'zone' statement,
 * with defaults in the 'view' or 'options' statement.
 */
static cfg_clausedef_t
zone_clauses[] = {
	{ "allow-query", &cfg_type_bracketed_aml, 0 },
	{ "allow-transfer", &cfg_type_bracketed_aml, 0 },
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	{ "notify", &cfg_type_notifytype, 0 },
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	{ "also-notify", &cfg_type_portiplist, 0 },
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	{ "dialup", &cfg_type_dialuptype, 0 },
	{ "forward", &cfg_type_forwardtype, 0 },
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	{ "forwarders", &cfg_type_portiplist, 0 },
	{ "maintain-ixfr-base", &cfg_type_boolean, 0 },
	{ "max-ixfr-log-size", &cfg_type_size, CFG_CLAUSEFLAG_OBSOLETE },
	{ "transfer-source", &cfg_type_sockaddr4wild, 0 },
	{ "transfer-source-v6", &cfg_type_sockaddr6wild, 0 },
	{ "max-transfer-time-in", &cfg_type_uint32, 0 },
	{ "max-transfer-time-out", &cfg_type_uint32, 0 },
	{ "max-transfer-idle-in", &cfg_type_uint32, 0 },
	{ "max-transfer-idle-out", &cfg_type_uint32, 0 },
	{ "max-retry-time", &cfg_type_uint32, 0 },
	{ "min-retry-time", &cfg_type_uint32, 0 },
	{ "max-refresh-time", &cfg_type_uint32, 0 },
	{ "min-refresh-time", &cfg_type_uint32, 0 },
	{ "sig-validity-interval", &cfg_type_uint32, 0 },
	{ "zone-statistics", &cfg_type_boolean, 0 },
	{ NULL, NULL, 0 }
};

/*
 * Clauses that can be found in a 'zone' statement
 * only.
 */
static cfg_clausedef_t
zone_only_clauses[] = {
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	{ "type", &cfg_type_zonetype, 0 },
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	{ "allow-update", &cfg_type_bracketed_aml, 0 },
	{ "allow-update-forwarding", &cfg_type_bracketed_aml, 0 },
	{ "file", &cfg_type_qstring, 0 },
	{ "ixfr-base", &cfg_type_qstring, CFG_CLAUSEFLAG_OBSOLETE },
	{ "ixfr-tmp-file", &cfg_type_qstring, CFG_CLAUSEFLAG_OBSOLETE },
	{ "masters", &cfg_type_sockaddrkeylist, 0 },
	{ "pubkey", &cfg_type_pubkey,
	  CFG_CLAUSEFLAG_MULTI | CFG_CLAUSEFLAG_OBSOLETE },
	{ "update-policy", &cfg_type_updatepolicy, 0 },
	{ "database", &cfg_type_astring, 0 },
	/*
	 * Note that the format of the check-names option is different between
	 * the zone options and the global/view options.  Ugh.
	 */
	{ "check-names", &cfg_type_ustring, CFG_CLAUSEFLAG_NOTIMP },
	{ NULL, NULL, 0 }
};

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/* The top-level named.conf syntax. */

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static cfg_clausedef_t *
namedconf_clausesets[] = {
	namedconf_clauses,
	namedconf_or_view_clauses,
	NULL
};

cfg_type_t cfg_type_namedconf = {
	"namedconf", parse_mapbody, print_mapbody, &cfg_rep_map,
	namedconf_clausesets
};

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/* The "options" statement syntax. */

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static cfg_clausedef_t *
options_clausesets[] = {
	options_clauses,
	view_clauses,
	zone_clauses,
	NULL
};
static cfg_type_t cfg_type_options = {
	"options", parse_map, print_map, &cfg_rep_map, options_clausesets };

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/* The "view" statement syntax. */

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static cfg_clausedef_t *
view_clausesets[] = {
	view_only_clauses,
	namedconf_or_view_clauses,
	view_clauses,
	zone_clauses,
	NULL
};
static cfg_type_t cfg_type_viewopts = {
	"view", parse_map, print_map, &cfg_rep_map, view_clausesets };

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/* The "zone" statement syntax. */

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static cfg_clausedef_t *
zone_clausesets[] = {
	zone_only_clauses,
	zone_clauses,
	NULL
};
static cfg_type_t cfg_type_zoneopts = {
	"zoneopts", parse_map, print_map, &cfg_rep_map, zone_clausesets };

/*
 * Clauses that can be found within the 'key' statement.
 */
static cfg_clausedef_t
key_clauses[] = {
	{ "algorithm", &cfg_type_astring, 0 },
	{ "secret", &cfg_type_astring, 0 },
	{ NULL, NULL, 0 }
};

static cfg_clausedef_t *
key_clausesets[] = {
	key_clauses,
	NULL
};
static cfg_type_t cfg_type_key = {
	"key", parse_named_map, print_map, &cfg_rep_map, key_clausesets };


/*
 * Clauses that can be found in a 'server' statement.
 */
static cfg_clausedef_t
server_clauses[] = {
	{ "bogus", &cfg_type_boolean, 0 },
	{ "provide-ixfr", &cfg_type_boolean, 0 },
	{ "request-ixfr", &cfg_type_boolean, 0 },
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	{ "support-ixfr", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
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	{ "transfers", &cfg_type_uint32, 0 },
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	{ "transfer-format", &cfg_type_transferformat, 0 },
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	{ "keys", &cfg_type_server_key_kludge, 0 },
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	{ "edns", &cfg_type_boolean, 0 },
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	{ NULL, NULL, 0 }
};
static cfg_clausedef_t *
server_clausesets[] = {
	server_clauses,
	NULL
};
static cfg_type_t cfg_type_server = {
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	"server", parse_addressed_map, print_map, &cfg_rep_map,
	server_clausesets
};
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/*
 * Clauses that can be found in a 'channel' clause in the
 * 'logging' statement.
 *
 * These have some additional constraints that need to be
 * checked after parsing:
 *  - There must exactly one of file/syslog/null/stderr
 *
 */
static cfg_clausedef_t
channel_clauses[] = {
	/* Destinations.  We no longer require these to be first. */
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	{ "file", &cfg_type_logfile, 0 },
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	{ "syslog", &cfg_type_optional_facility, 0 },
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	{ "null", &cfg_type_void, 0 },
	{ "stderr", &cfg_type_void, 0 },
	/* Options.  We now accept these for the null channel, too. */
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	{ "severity", &cfg_type_logseverity, 0 },
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	{ "print-time", &cfg_type_boolean, 0 },
	{ "print-severity", &cfg_type_boolean, 0 },
	{ "print-category", &cfg_type_boolean, 0 },
	{ NULL, NULL, 0 }
};
static cfg_clausedef_t *
channel_clausesets[] = {
	channel_clauses,
	NULL
};
static cfg_type_t cfg_type_channel = {
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	"channel", parse_named_map, print_map,
	&cfg_rep_map, channel_clausesets
};
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/* A list of log destination, used in the "category" clause. */
static cfg_type_t cfg_type_destinationlist = {
	"destinationlist", parse_bracketed_list, print_bracketed_list,
	&cfg_rep_list, &cfg_type_astring };

/*
 * Clauses that can be found in a 'logging' statement.
 */
static cfg_clausedef_t
logging_clauses[] = {
	{ "channel", &cfg_type_channel, CFG_CLAUSEFLAG_MULTI },
	{ "category", &cfg_type_category, CFG_CLAUSEFLAG_MULTI },
	{ NULL, NULL, 0 }
};
static cfg_clausedef_t *
logging_clausesets[] = {
	logging_clauses,
	NULL
};
static cfg_type_t cfg_type_logging = {
	"logging", parse_map, print_map, &cfg_rep_map, logging_clausesets };


/* Functions. */

static void
print_obj(cfg_printer_t *pctx, cfg_obj_t *obj) {
	obj->type->print(pctx, obj);
}

static void
print(cfg_printer_t *pctx, const char *text, int len) {
	pctx->f(pctx->closure, text, len);
}

static void
print_open(cfg_printer_t *pctx) {
	print(pctx, "{\n", 2);
	pctx->indent++;
}

static void
print_indent(cfg_printer_t *pctx) {
	int indent = pctx->indent;
	while (indent > 0) {
		print(pctx, "\t", 1);
		indent--;
	}
}

static void
print_close(cfg_printer_t *pctx) {
	pctx->indent--;
	print_indent(pctx);
	print(pctx, "}", 1);
}

static isc_result_t
parse(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret) {
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	isc_result_t result;
	INSIST(ret != NULL && *ret == NULL);
	result = type->parse(pctx, type, ret);
	if (result != ISC_R_SUCCESS)
		return (result);
	INSIST(*ret != NULL);
	return (ISC_R_SUCCESS);
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}

void
cfg_print(cfg_obj_t *obj,
	  void (*f)(void *closure, const char *text, int textlen),
	  void *closure)
{
	cfg_printer_t pctx;
	pctx.f = f;
	pctx.closure = closure;
	pctx.indent = 0;
	obj->type->print(&pctx, obj);
}

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/* Tuples. */
  
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static isc_result_t
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create_tuple(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret) {
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	isc_result_t result;
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	cfg_tuplefielddef_t *fields = type->of;
	cfg_tuplefielddef_t *f;
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	cfg_obj_t *obj = NULL;
	unsigned int nfields = 0;
	int i;
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	for (f = fields; f->name != NULL; f++)
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		nfields++;

	CHECK(create_cfgobj(pctx, type, &obj));
	obj->value.tuple = isc_mem_get(pctx->mctx,
				       nfields * sizeof(cfg_obj_t *));
1189 1190 1191 1192
	if (obj->value.tuple == NULL) {
		result = ISC_R_NOMEMORY;
		goto cleanup;
	}
1193
	for (f = fields, i = 0; f->name != NULL; f++, i++)
1194
		obj->value.tuple[i] = NULL;
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210
	*ret = obj;
	return (ISC_R_SUCCESS);

 cleanup:
	CLEANUP_OBJ(obj);
	return (result);
}

static isc_result_t
parse_tuple(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret)
{
	isc_result_t result;
	cfg_tuplefielddef_t *fields = type->of;
	cfg_tuplefielddef_t *f;
	cfg_obj_t *obj = NULL;
	unsigned int i;
1211

1212
	CHECK(create_tuple(pctx, type, &obj));
1213 1214
	for (f = fields, i = 0; f->name != NULL; f++, i++)
		CHECK(parse(pctx, f->type, &obj->value.tuple[i]));
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226

	*ret = obj;
	return (ISC_R_SUCCESS);

 cleanup:
	CLEANUP_OBJ(obj);
	return (result);
}

static void
print_tuple(cfg_printer_t *pctx, cfg_obj_t *obj) {
	unsigned int i;
1227 1228
	cfg_tuplefielddef_t *fields = obj->type->of;
	cfg_tuplefielddef_t *f;
1229
	isc_boolean_t need_space = ISC_FALSE;
1230

1231
	for (f = fields, i = 0; f->name != NULL; f++, i++) {
1232 1233
		cfg_obj_t *fieldobj = obj->value.tuple[i];
		if (need_space)
1234
			print(pctx, " ", 1);
1235 1236
		print_obj(pctx, fieldobj);
		need_space = ISC_TF(fieldobj->type->print != print_void);
1237 1238 1239 1240 1241 1242
	}
}

static void
free_tuple(cfg_parser_t *pctx, cfg_obj_t *obj) {
	unsigned int i;
1243 1244
	cfg_tuplefielddef_t *fields = obj->type->of;
	cfg_tuplefielddef_t *f;
1245 1246
	unsigned int nfields = 0;

1247 1248 1249
	if (obj->value.tuple == NULL)
		return;

1250
	for (f = fields, i = 0; f->name != NULL; f++, i++) {
1251 1252 1253 1254 1255 1256 1257
		CLEANUP_OBJ(obj->value.tuple[i]);
		nfields++;
	}
	isc_mem_put(pctx->mctx, obj->value.tuple,
		    nfields * sizeof(cfg_obj_t *));
}

1258 1259 1260 1261 1262 1263
isc_boolean_t
cfg_obj_istuple(cfg_obj_t *obj) {
	REQUIRE(obj != NULL);
	return (ISC_TF(obj->type->rep == &cfg_rep_tuple));
}

1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
cfg_obj_t *
cfg_tuple_get(cfg_obj_t *tupleobj, const char* name) {
	unsigned int i;
	cfg_tuplefielddef_t *fields;
	cfg_tuplefielddef_t *f;
	
	REQUIRE(tupleobj != NULL && tupleobj->type->rep == &cfg_rep_tuple);

	fields = tupleobj->type->of;
	for (f = fields, i = 0; f->name != NULL; f++, i++) {
		if (strcmp(f->name, name) == 0)
			return (tupleobj->value.tuple[i]);
	}
	INSIST(0);
	return (NULL);
}

/*
 * Parse a required special character.
 */
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336
static isc_result_t
parse_special(cfg_parser_t *pctx, int special) {
        isc_result_t result;
	CHECK(cfg_gettoken(pctx, 0));
	if (pctx->token.type == isc_tokentype_special &&
	    pctx->token.value.as_char == special)
		return (ISC_R_SUCCESS);

	parser_error(pctx, LOG_NEAR, "'%c' expected", special);
	return (ISC_R_UNEXPECTEDTOKEN);
 cleanup:
	return (result);
}

/*
 * Parse a required semicolon.  If it is not there, log
 * an error and increment the error count but continue
 * parsing.  Since the next token is pushed back,
 * care must be taken to make sure it is eventually
 * consumed or an infinite loop may result.
 */
static isc_result_t
parse_semicolon(cfg_parser_t *pctx) {
        isc_result_t result;
	CHECK(cfg_gettoken(pctx, 0));
	if (pctx->token.type == isc_tokentype_special &&
	    pctx->token.value.as_char == ';')
		return (ISC_R_SUCCESS);

	parser_error(pctx, LOG_BEFORE, "missing ';'");
	cfg_ungettoken(pctx);
 cleanup:
	return (result);
}

/*
 * Parse EOF, logging and returning an error if not there.
 */
static isc_result_t
parse_eof(cfg_parser_t *pctx) {
        isc_result_t result;
	CHECK(cfg_gettoken(pctx, 0));

	if (pctx->token.type == isc_tokentype_eof)
		return (ISC_R_SUCCESS);

	parser_error(pctx, LOG_NEAR, "syntax error");
	return (ISC_R_UNEXPECTEDTOKEN);
 cleanup:
	return(result);
}

/* A list of files, used internally for pctx->files. */
1337

1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
static cfg_type_t cfg_type_filelist = {
	"filelist", NULL, print_list, &cfg_rep_list,
	&cfg_type_qstring
};

isc_result_t
cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret)
{
	isc_result_t result;
	cfg_parser_t *pctx;
	isc_lexspecials_t specials;

	REQUIRE(mctx != NULL);
	REQUIRE(ret != NULL && *ret == NULL);

	pctx = isc_mem_get(mctx, sizeof(*pctx));
	if (pctx == NULL)
		return (ISC_R_NOMEMORY);

	pctx->mctx = mctx;
	pctx->lctx = lctx;
	pctx->lexer = NULL;
	pctx->seen_eof = ISC_FALSE;
	pctx->ungotten = ISC_FALSE;
	pctx->errors = 0;
1363 1364
	pctx->open_files = NULL;
	pctx->closed_files = NULL;
1365
	pctx->line = 0;
1366 1367
	pctx->callback = NULL;
	pctx->callbackarg = NULL;
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383

	memset(specials, 0, sizeof(specials));
	specials['{'] = 1;
	specials['}'] = 1;
	specials[';'] = 1;
	specials['/'] = 1;
	specials['"'] = 1;
	specials['!'] = 1;

	CHECK(isc_lex_create(pctx->mctx, 1024, &pctx->lexer));

	isc_lex_setspecials(pctx->lexer, specials);
	isc_lex_setcomments(pctx->lexer, (ISC_LEXCOMMENT_C |
					 ISC_LEXCOMMENT_CPLUSPLUS |
					 ISC_LEXCOMMENT_SHELL));

1384 1385
	CHECK(create_list(pctx, &cfg_type_filelist, &pctx->open_files));
	CHECK(create_list(pctx, &cfg_type_filelist, &pctx->closed_files));
1386 1387 1388 1389 1390 1391 1392

	*ret = pctx;
	return (ISC_R_SUCCESS);

 cleanup:
	if (pctx->lexer != NULL)
		isc_lex_destroy(&pctx->lexer);
1393 1394
	CLEANUP_OBJ(pctx->open_files);
	CLEANUP_OBJ(pctx->closed_files);
1395 1396 1397 1398 1399
	isc_mem_put(mctx, pctx, sizeof(*pctx));
	return (result);
}

static isc_result_t
1400
parser_openfile(cfg_parser_t *pctx, const char *filename) {
1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414
	isc_result_t result;
	cfg_listelt_t *elt = NULL;
	cfg_obj_t *stringobj = NULL;

	result = isc_lex_openfile(pctx->lexer, filename);
	if (result != ISC_R_SUCCESS) {
		parser_error(pctx, 0, "open: %s: %s",
			     filename, isc_result_totext(result));
		goto cleanup;
	}

	CHECK(create_string(pctx, filename, &cfg_type_qstring, &stringobj));
	CHECK(create_listelt(pctx, &elt));
	elt->obj = stringobj;
1415
	ISC_LIST_APPEND(pctx->open_files->value.list, elt, link);
1416 1417 1418 1419 1420 1421 1422

	return (ISC_R_SUCCESS);
 cleanup:
	CLEANUP_OBJ(stringobj);
	return (result);
}

1423 1424 1425 1426 1427 1428 1429 1430 1431
void
cfg_parser_setcallback(cfg_parser_t *pctx,
		       cfg_parsecallback_t callback,
		       void *arg)
{
	pctx->callback = callback;
	pctx->callbackarg = arg;
}

1432 1433 1434 1435 1436 1437
/*
 * Parse a configuration using a pctx where a lexer has already
 * been set up with a source.
 */
static isc_result_t
parse2(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret) {
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
	isc_result_t result;
	cfg_obj_t *obj = NULL;

	result = parse(pctx, type, &obj);

	if (pctx->errors != 0) {
		/* Errors have been logged. */
		if (result == ISC_R_SUCCESS)
			result = ISC_R_FAILURE;
		goto cleanup;
	}

	if (result != ISC_R_SUCCESS) {
		/* Parsing failed but no errors have been logged. */
		parser_error(pctx, 0, "parsing failed");
		goto cleanup;
	}

	CHECK(parse_eof(pctx));

	*ret = obj;
	return (ISC_R_SUCCESS);

 cleanup:
	CLEANUP_OBJ(obj);
	return (result);
}

1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492
isc_result_t
cfg_parse_file(cfg_parser_t *pctx, const char *filename,
	       cfg_type_t *type, cfg_obj_t **ret)
{
	isc_result_t result;

	REQUIRE(filename != NULL);

	CHECK(parser_openfile(pctx, filename));
	CHECK(parse2(pctx, type, ret));
 cleanup:
	return (result);
}


isc_result_t
cfg_parse_buffer(cfg_parser_t *pctx, isc_buffer_t *buffer,
	cfg_type_t *type, cfg_obj_t **ret)
{
	isc_result_t result;
	REQUIRE(buffer != NULL);
	CHECK(isc_lex_openbuffer(pctx->lexer, buffer));	
	CHECK(parse2(pctx, type, ret));
 cleanup:
	return (result);
}

1493 1494 1495 1496
void
cfg_parser_destroy(cfg_parser_t **pctxp) {
	cfg_parser_t *pctx = *pctxp;
	isc_lex_destroy(&pctx->lexer);
1497 1498 1499 1500 1501 1502 1503
	/*
	 * Cleaning up open_files does not
	 * close the files; that was already done
	 * by closing the lexer.
	 */
	CLEANUP_OBJ(pctx->open_files);
	CLEANUP_OBJ(pctx->closed_files);
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521
	isc_mem_put(pctx->mctx, pctx, sizeof(*pctx));
	*pctxp = NULL;
}

/*
 * void
 */
static isc_result_t
parse_void(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret) {
	UNUSED(type);
	return (create_cfgobj(pctx, &cfg_type_void, ret));
}

static void
print_void(cfg_printer_t *pctx, cfg_obj_t *obj) {
	UNUSED(pctx);
	UNUSED(obj);
}
1522 1523 1524 1525 1526 1527 1528

isc_boolean_t
cfg_obj_isvoid(cfg_obj_t *obj) {
	REQUIRE(obj != NULL);
	return (ISC_TF(obj->type->rep == &cfg_rep_void));
}

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541
static cfg_type_t cfg_type_void = {
	"void", parse_void, print_void, &cfg_rep_void, NULL };


/*
 * uint32
 */
static isc_result_t
parse_uint32(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret) {
        isc_result_t result;
	cfg_obj_t *obj = NULL;
	UNUSED(type);

1542
	CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER | ISC_LEXOPT_CNUMBER));
1543
	if (pctx->token.type != isc_tokentype_number) {
1544
		parser_error(pctx, LOG_NEAR, "expected number");
1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558
		return (ISC_R_UNEXPECTEDTOKEN);
	}

	CHECK(create_cfgobj(pctx, &cfg_type_uint32, &obj));

	obj->value.uint32 = pctx->token.value.as_ulong;
	*ret = obj;
 cleanup:
	return (result);
}

static void
print_uint(cfg_printer_t *pctx, unsigned int u) {
	char buf[32];
1559
	snprintf(buf, sizeof(buf), "%u", u);
1560 1561 1562 1563 1564 1565 1566 1567
	print(pctx, buf, strlen(buf));
}

static void
print_uint32(cfg_printer_t *pctx, cfg_obj_t *obj) {
	print_uint(pctx, obj->value.uint32);
}

1568 1569 1570 1571 1572 1573
isc_boolean_t
cfg_obj_isuint32(cfg_obj_t *obj) {
	REQUIRE(obj != NULL);
	return (ISC_TF(obj->type->rep == &cfg_rep_uint32));
}

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