diff options
Diffstat (limited to 'usr.sbin/bind/lib/isccfg/parser.c')
| -rw-r--r-- | usr.sbin/bind/lib/isccfg/parser.c | 3943 |
1 files changed, 3943 insertions, 0 deletions
diff --git a/usr.sbin/bind/lib/isccfg/parser.c b/usr.sbin/bind/lib/isccfg/parser.c new file mode 100644 index 00000000000..1ba5f6f29c1 --- /dev/null +++ b/usr.sbin/bind/lib/isccfg/parser.c @@ -0,0 +1,3943 @@ +/* + * Copyright (C) 2000-2002 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. + */ + +/* $ISC: parser.c,v 1.70.2.14 2002/02/08 03:57:47 marka Exp $ */ + +#include <config.h> + +#include <isc/buffer.h> +#include <isc/dir.h> +#include <isc/formatcheck.h> +#include <isc/lex.h> +#include <isc/log.h> +#include <isc/mem.h> +#include <isc/net.h> +#include <isc/netaddr.h> +#include <isc/print.h> +#include <isc/string.h> +#include <isc/sockaddr.h> +#include <isc/util.h> +#include <isc/symtab.h> + +#include <isccfg/cfg.h> +#include <isccfg/log.h> + +/* Shorthand */ +#define CAT CFG_LOGCATEGORY_CONFIG +#define MOD CFG_LOGMODULE_PARSER + +#define QSTRING (ISC_LEXOPT_QSTRING | ISC_LEXOPT_QSTRINGMULTILINE) + +/* + * 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*/ + +/* Clause may occur multiple times (e.g., "zone") */ +#define CFG_CLAUSEFLAG_MULTI 0x00000001 +/* Clause is obsolete */ +#define CFG_CLAUSEFLAG_OBSOLETE 0x00000002 +/* Clause is not implemented, and may never be */ +#define CFG_CLAUSEFLAG_NOTIMP 0x00000004 +/* Clause is not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 +/* Default value has changed since earlier release */ +#define CFG_CLAUSEFLAG_NEWDEFAULT 0x00000010 +/* + * Clause needs to be interpreted during parsing + * by calling a callback function, like the + * "directory" option. + */ +#define CFG_CLAUSEFLAG_CALLBACK 0x00000020 + +/* + * 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; +typedef struct cfg_tuplefielddef cfg_tuplefielddef_t; +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 *, const 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 *); + + +/* + * 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; + + /* + * 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. + */ + 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; + + /* + * 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; + + cfg_parsecallback_t callback; + void *callbackarg; +}; + +/* + * A configuration printer object. This is an abstract + * interface to a destination to which text can be printed + * by calling the function 'f'. + */ +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; +}; + +/* A tuple field definition. */ + +struct cfg_tuplefielddef { + const char *name; + cfg_type_t *type; + unsigned int flags; +}; + +/* 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 */ + const void * of; /* For meta-types */ +}; + +/* A keyword-type definition, for things like "port <integer>". */ + +typedef struct { + const char *name; + const cfg_type_t *type; +} keyword_type_t; + +struct cfg_map { + cfg_obj_t *id; /* Used for 'named maps' like keys, zones, &c */ + const cfg_clausedef_t * const *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 { + const cfg_type_t *type; + union { + isc_uint32_t uint32; + isc_uint64_t uint64; + isc_textregion_t string; /* null terminated, too */ + 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. */ + +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, const cfg_type_t *type, cfg_obj_t **objp); + +static isc_result_t +create_list(cfg_parser_t *pctx, const 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 +create_string(cfg_parser_t *pctx, const char *contents, const cfg_type_t *type, + 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, const cfg_type_t *type, cfg_obj_t **objp); + +static isc_result_t +create_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **objp); + +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); + +static void +print_void(cfg_printer_t *pctx, cfg_obj_t *obj); + +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_mapbody(cfg_parser_t *pctx, const 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, const 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, const cfg_type_t *type, cfg_obj_t **ret); + +static isc_result_t +parse_addressed_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret); + +static isc_result_t +parse_list(cfg_parser_t *pctx, const 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, const 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, const cfg_type_t *type, cfg_obj_t **ret); + +static void +print_spacelist(cfg_printer_t *pctx, cfg_obj_t *obj); + +static void +print_sockaddr(cfg_printer_t *pctx, cfg_obj_t *obj); + +static isc_result_t +parse_addrmatchelt(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret); + +static isc_result_t +parse_bracketed_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret); + +static void +print_bracketed_list(cfg_printer_t *pctx, cfg_obj_t *obj); + +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, cfg_obj_t *obj); + +static isc_result_t +parse_symtab_elt(cfg_parser_t *pctx, const char *name, + cfg_type_t *elttype, isc_symtab_t *symtab, + isc_boolean_t callback); + +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, + const char *fmt, ...) ISC_FORMAT_PRINTF(3, 4); + +static void +parser_warning(cfg_parser_t *pctx, unsigned int flags, + const char *fmt, ...) ISC_FORMAT_PRINTF(3, 4); + +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); + +static void +print_ustring(cfg_printer_t *pctx, cfg_obj_t *obj); + +static isc_result_t +parse_enum(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret); + +/* + * Data representations. These correspond to members of the + * "value" union in struct cfg_obj (except "void", which does + * not need a union member). + */ + +cfg_rep_t cfg_rep_uint32 = { "uint32", free_noop }; +cfg_rep_t cfg_rep_uint64 = { "uint64", free_noop }; +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. + * Additional types are declared publicly in cfg.h. + */ + +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; +static cfg_type_t cfg_type_netaddr; +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_sizenodefault; +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; +static cfg_type_t cfg_type_logfile; +static cfg_type_t cfg_type_lwres; +static cfg_type_t cfg_type_controls_sockaddr; +static cfg_type_t cfg_type_notifytype; +static cfg_type_t cfg_type_dialuptype; + +/* + * Configuration type definitions. + */ + +/* 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", parse_tuple, print_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", parse_tuple, print_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", 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; }" + */ + +static cfg_tuplefielddef_t sockaddrkey_fields[] = { + { "sockaddr", &cfg_type_sockaddr, 0 }, + { "key", &cfg_type_optional_keyref, 0 }, + { NULL, NULL, 0 }, +}; + +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 +}; + +static cfg_tuplefielddef_t sockaddrkeylist_fields[] = { + { "port", &cfg_type_optional_port, 0 }, + { "addresses", &cfg_type_bracketed_sockaddrkeylist, 0 }, + { NULL, NULL, 0 } +}; +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; }" + */ +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", parse_tuple, print_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", 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 +}; + +static const char *mode_enums[] = { "grant", "deny", NULL }; +static cfg_type_t cfg_type_mode = { + "mode", parse_enum, print_ustring, &cfg_rep_string, + &mode_enums +}; + +static const char *matchtype_enums[] = { + "name", "subdomain", "wildcard", "self", NULL }; +static cfg_type_t cfg_type_matchtype = { + "matchtype", parse_enum, print_ustring, &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", parse_tuple, print_tuple, &cfg_rep_tuple, grant_fields }; + +static cfg_type_t cfg_type_updatepolicy = { + "update_policy", parse_bracketed_list, print_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", parse_tuple, print_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", parse_tuple, print_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", parse_tuple, print_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", 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, + print_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, &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, &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", 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. + */ +static cfg_tuplefielddef_t checknames_fields[] = { + { "type", &cfg_type_ustring, 0 }, + { "mode", &cfg_type_ustring, 0 }, + { NULL, NULL, 0 } +}; +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 = { + "rrsetorder", parse_bracketed_list, print_bracketed_list, + &cfg_rep_list, &cfg_type_rrsetorderingelement +}; + +static keyword_type_t port_kw = { "port", &cfg_type_uint32 }; + +static cfg_type_t cfg_type_optional_port = { + "optional_port", parse_optional_keyvalue, print_keyvalue, + &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 }; + +static const char *forwardtype_enums[] = { "first", "only", NULL }; +static cfg_type_t cfg_type_forwardtype = { + "forwardtype", parse_enum, print_ustring, &cfg_rep_string, + &forwardtype_enums +}; + +static const char *zonetype_enums[] = { + "master", "slave", "stub", "hint", "forward", NULL }; +static cfg_type_t cfg_type_zonetype = { + "zonetype", parse_enum, print_ustring, &cfg_rep_string, + &zonetype_enums +}; + +static const char *loglevel_enums[] = { + "critical", "error", "warning", "notice", "info", "dynamic", NULL }; +static cfg_type_t cfg_type_loglevel = { + "loglevel", parse_enum, print_ustring, &cfg_rep_string, + &loglevel_enums +}; + +static const char *transferformat_enums[] = { + "many-answers", "one-answer", NULL }; +static cfg_type_t cfg_type_transferformat = { + "transferformat", parse_enum, print_ustring, &cfg_rep_string, + &transferformat_enums +}; + +/* + * 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 }, + { "lwres", &cfg_type_lwres, CFG_CLAUSEFLAG_MULTI }, + { 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 }, + { "directory", &cfg_type_qstring, CFG_CLAUSEFLAG_CALLBACK }, + { "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, CFG_CLAUSEFLAG_NOTIMP }, + { "interface-interval", &cfg_type_uint32, 0 }, + { "listen-on", &cfg_type_listenon, CFG_CLAUSEFLAG_MULTI }, + { "listen-on-v6", &cfg_type_listenon, CFG_CLAUSEFLAG_MULTI }, + { "match-mapped-addresses", &cfg_type_boolean, 0 }, + { "memstatistics-file", &cfg_type_qstring, CFG_CLAUSEFLAG_NOTIMP }, + { "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, CFG_CLAUSEFLAG_NOTIMP }, + { "serial-queries", &cfg_type_uint32, CFG_CLAUSEFLAG_OBSOLETE }, + { "serial-query-rate", &cfg_type_uint32, 0 }, + { "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-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 }, + { "minimal-responses", &cfg_type_boolean, 0 }, + { "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 }, + { "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_transferformat, 0 }, + { "max-cache-size", &cfg_type_sizenodefault, 0 }, + { "check-names", &cfg_type_checknames, + CFG_CLAUSEFLAG_MULTI | CFG_CLAUSEFLAG_NOTIMP }, + { "cache-file", &cfg_type_qstring, 0 }, + { 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 }, + { "match-destinations", &cfg_type_bracketed_aml, 0 }, + { "match-recursive-only", &cfg_type_boolean, 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 }, + { "allow-update-forwarding", &cfg_type_bracketed_aml, 0 }, + { "allow-notify", &cfg_type_bracketed_aml, 0 }, + { "notify", &cfg_type_notifytype, 0 }, + { "notify-source", &cfg_type_sockaddr4wild, 0 }, + { "notify-source-v6", &cfg_type_sockaddr6wild, 0 }, + { "also-notify", &cfg_type_portiplist, 0 }, + { "dialup", &cfg_type_dialuptype, 0 }, + { "forward", &cfg_type_forwardtype, 0 }, + { "forwarders", &cfg_type_portiplist, 0 }, + { "maintain-ixfr-base", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE }, + { "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[] = { + { "type", &cfg_type_zonetype, 0 }, + { "allow-update", &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 } +}; + + +/* The top-level named.conf syntax. */ + +static cfg_clausedef_t * +namedconf_clausesets[] = { + namedconf_clauses, + namedconf_or_view_clauses, + NULL +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_namedconf = { + "namedconf", parse_mapbody, print_mapbody, &cfg_rep_map, + namedconf_clausesets +}; + +/* The "options" statement syntax. */ + +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 }; + +/* The "view" statement syntax. */ + +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 }; + +/* The "zone" statement syntax. */ + +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 }, + { "support-ixfr", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE }, + { "transfers", &cfg_type_uint32, 0 }, + { "transfer-format", &cfg_type_transferformat, 0 }, + { "keys", &cfg_type_server_key_kludge, 0 }, + { "edns", &cfg_type_boolean, 0 }, + { NULL, NULL, 0 } +}; +static cfg_clausedef_t * +server_clausesets[] = { + server_clauses, + NULL +}; +static cfg_type_t cfg_type_server = { + "server", parse_addressed_map, print_map, &cfg_rep_map, + server_clausesets +}; + + +/* + * 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. */ + { "file", &cfg_type_logfile, 0 }, + { "syslog", &cfg_type_optional_facility, 0 }, + { "null", &cfg_type_void, 0 }, + { "stderr", &cfg_type_void, 0 }, + /* Options. We now accept these for the null channel, too. */ + { "severity", &cfg_type_logseverity, 0 }, + { "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 = { + "channel", parse_named_map, print_map, + &cfg_rep_map, channel_clausesets +}; + +/* 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, const cfg_type_t *type, cfg_obj_t **ret) { + 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); +} + +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); +} + + +/* Tuples. */ + +static isc_result_t +create_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + const cfg_tuplefielddef_t *fields = type->of; + const cfg_tuplefielddef_t *f; + cfg_obj_t *obj = NULL; + unsigned int nfields = 0; + int i; + + for (f = fields; f->name != NULL; f++) + nfields++; + + CHECK(create_cfgobj(pctx, type, &obj)); + obj->value.tuple = isc_mem_get(pctx->mctx, + nfields * sizeof(cfg_obj_t *)); + if (obj->value.tuple == NULL) { + result = ISC_R_NOMEMORY; + goto cleanup; + } + for (f = fields, i = 0; f->name != NULL; f++, i++) + obj->value.tuple[i] = NULL; + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static isc_result_t +parse_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + const cfg_tuplefielddef_t *fields = type->of; + const cfg_tuplefielddef_t *f; + cfg_obj_t *obj = NULL; + unsigned int i; + + CHECK(create_tuple(pctx, type, &obj)); + for (f = fields, i = 0; f->name != NULL; f++, i++) + CHECK(parse(pctx, f->type, &obj->value.tuple[i])); + + *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; + const cfg_tuplefielddef_t *fields = obj->type->of; + const cfg_tuplefielddef_t *f; + isc_boolean_t need_space = ISC_FALSE; + + for (f = fields, i = 0; f->name != NULL; f++, i++) { + cfg_obj_t *fieldobj = obj->value.tuple[i]; + if (need_space) + print(pctx, " ", 1); + print_obj(pctx, fieldobj); + need_space = ISC_TF(fieldobj->type->print != print_void); + } +} + +static void +free_tuple(cfg_parser_t *pctx, cfg_obj_t *obj) { + unsigned int i; + const cfg_tuplefielddef_t *fields = obj->type->of; + const cfg_tuplefielddef_t *f; + unsigned int nfields = 0; + + if (obj->value.tuple == NULL) + return; + + for (f = fields, i = 0; f->name != NULL; f++, i++) { + CLEANUP_OBJ(obj->value.tuple[i]); + nfields++; + } + isc_mem_put(pctx->mctx, obj->value.tuple, + nfields * sizeof(cfg_obj_t *)); +} + +isc_boolean_t +cfg_obj_istuple(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_tuple)); +} + +cfg_obj_t * +cfg_tuple_get(cfg_obj_t *tupleobj, const char* name) { + unsigned int i; + const cfg_tuplefielddef_t *fields; + const 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. + */ +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. */ + +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; + pctx->warnings = 0; + pctx->open_files = NULL; + pctx->closed_files = NULL; + pctx->line = 0; + pctx->callback = NULL; + pctx->callbackarg = NULL; + pctx->token.type = isc_tokentype_unknown; + + 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)); + + CHECK(create_list(pctx, &cfg_type_filelist, &pctx->open_files)); + CHECK(create_list(pctx, &cfg_type_filelist, &pctx->closed_files)); + + *ret = pctx; + return (ISC_R_SUCCESS); + + cleanup: + if (pctx->lexer != NULL) + isc_lex_destroy(&pctx->lexer); + CLEANUP_OBJ(pctx->open_files); + CLEANUP_OBJ(pctx->closed_files); + isc_mem_put(mctx, pctx, sizeof(*pctx)); + return (result); +} + +static isc_result_t +parser_openfile(cfg_parser_t *pctx, const char *filename) { + 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; + ISC_LIST_APPEND(pctx->open_files->value.list, elt, link); + + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(stringobj); + return (result); +} + +void +cfg_parser_setcallback(cfg_parser_t *pctx, + cfg_parsecallback_t callback, + void *arg) +{ + pctx->callback = callback; + pctx->callbackarg = arg; +} + +/* + * 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, const cfg_type_t *type, cfg_obj_t **ret) { + 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); +} + +isc_result_t +cfg_parse_file(cfg_parser_t *pctx, const char *filename, + const 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, + const 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); +} + +void +cfg_parser_destroy(cfg_parser_t **pctxp) { + cfg_parser_t *pctx = *pctxp; + isc_lex_destroy(&pctx->lexer); + /* + * 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); + isc_mem_put(pctx->mctx, pctx, sizeof(*pctx)); + *pctxp = NULL; +} + +/* + * void + */ +static isc_result_t +parse_void(cfg_parser_t *pctx, const 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); +} + +isc_boolean_t +cfg_obj_isvoid(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_void)); +} + +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, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + UNUSED(type); + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER | ISC_LEXOPT_CNUMBER)); + if (pctx->token.type != isc_tokentype_number) { + parser_error(pctx, LOG_NEAR, "expected number"); + 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_cstr(cfg_printer_t *pctx, const char *s) { + print(pctx, s, strlen(s)); +} + +static void +print_uint(cfg_printer_t *pctx, unsigned int u) { + char buf[32]; + snprintf(buf, sizeof(buf), "%u", u); + print_cstr(pctx, buf); +} + +static void +print_uint32(cfg_printer_t *pctx, cfg_obj_t *obj) { + print_uint(pctx, obj->value.uint32); +} + +isc_boolean_t +cfg_obj_isuint32(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_uint32)); +} + +isc_uint32_t +cfg_obj_asuint32(cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_uint32); + return (obj->value.uint32); +} + +static cfg_type_t cfg_type_uint32 = { + "integer", parse_uint32, print_uint32, &cfg_rep_uint32, NULL }; + + +/* + * uint64 + */ +isc_boolean_t +cfg_obj_isuint64(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_uint64)); +} + +isc_uint64_t +cfg_obj_asuint64(cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_uint64); + return (obj->value.uint64); +} + +static isc_result_t +parse_unitstring(char *str, isc_resourcevalue_t *valuep) { + char *endp; + unsigned int len; + isc_uint64_t value; + isc_uint64_t unit; + + value = isc_string_touint64(str, &endp, 10); + if (*endp == 0) { + *valuep = value; + return (ISC_R_SUCCESS); + } + + len = strlen(str); + if (len < 2 || endp[1] != '\0') + return (ISC_R_FAILURE); + + switch (str[len - 1]) { + case 'k': + case 'K': + unit = 1024; + break; + case 'm': + case 'M': + unit = 1024 * 1024; + break; + case 'g': + case 'G': + unit = 1024 * 1024 * 1024; + break; + default: + return (ISC_R_FAILURE); + } + if (value > ISC_UINT64_MAX / unit) + return (ISC_R_FAILURE); + *valuep = value * unit; + return (ISC_R_SUCCESS); +} + +static void +print_uint64(cfg_printer_t *pctx, cfg_obj_t *obj) { + char buf[32]; + sprintf(buf, "%" ISC_PRINT_QUADFORMAT "u", obj->value.uint64); + print_cstr(pctx, buf); +} + +static cfg_type_t cfg_type_uint64 = { + "64_bit_integer", NULL, print_uint64, &cfg_rep_uint64, NULL }; + +static isc_result_t +parse_sizeval(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_uint64_t val; + + UNUSED(type); + + CHECK(cfg_gettoken(pctx, 0)); + CHECK(parse_unitstring(pctx->token.value.as_pointer, &val)); + + CHECK(create_cfgobj(pctx, &cfg_type_uint64, &obj)); + obj->value.uint64 = val; + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + parser_error(pctx, LOG_NEAR, "expected integer and optional unit"); + return (result); +} + +/* + * A size value (number + optional unit). + */ +static cfg_type_t cfg_type_sizeval = { + "sizeval", parse_sizeval, print_uint64, &cfg_rep_uint64, NULL }; + +/* + * A size, "unlimited", or "default". + */ + +static isc_result_t +parse_size(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_enum_or_other(pctx, type, &cfg_type_sizeval, ret)); +} + +static const char *size_enums[] = { "unlimited", "default", NULL }; +static cfg_type_t cfg_type_size = { + "size", parse_size, print_ustring, &cfg_rep_string, size_enums +}; + +/* + * A size or "unlimited", but not "default". + */ +static const char *sizenodefault_enums[] = { "unlimited", NULL }; +static cfg_type_t cfg_type_sizenodefault = { + "size_no_default", parse_size, print_ustring, &cfg_rep_string, + sizenodefault_enums +}; + +/* + * optional_keyvalue + */ +static isc_result_t +parse_maybe_optional_keyvalue(cfg_parser_t *pctx, const cfg_type_t *type, + isc_boolean_t optional, cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + const keyword_type_t *kw = type->of; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string && + strcasecmp(pctx->token.value.as_pointer, kw->name) == 0) { + CHECK(cfg_gettoken(pctx, 0)); + CHECK(kw->type->parse(pctx, kw->type, &obj)); + obj->type = type; /* XXX kludge */ + } else { + if (optional) { + CHECK(parse_void(pctx, NULL, &obj)); + } else { + parser_error(pctx, LOG_NEAR, "expected '%s'", + kw->name); + result = ISC_R_UNEXPECTEDTOKEN; + goto cleanup; + } + } + *ret = obj; + cleanup: + return (result); +} + +static isc_result_t +parse_keyvalue(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_maybe_optional_keyvalue(pctx, type, ISC_FALSE, ret)); +} + +static isc_result_t +parse_optional_keyvalue(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_maybe_optional_keyvalue(pctx, type, ISC_TRUE, ret)); +} + +static void +print_keyvalue(cfg_printer_t *pctx, cfg_obj_t *obj) { + const keyword_type_t *kw = obj->type->of; + print_cstr(pctx, kw->name); + print(pctx, " ", 1); + kw->type->print(pctx, obj); +} + +/* + * qstring, ustring, astring + */ + +/* Create a string object from a null-terminated C string. */ +static isc_result_t +create_string(cfg_parser_t *pctx, const char *contents, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + int len; + + CHECK(create_cfgobj(pctx, type, &obj)); + len = strlen(contents); + obj->value.string.length = len; + obj->value.string.base = isc_mem_get(pctx->mctx, len + 1); + if (obj->value.string.base == 0) { + CLEANUP_OBJ(obj); + return (ISC_R_NOMEMORY); + } + memcpy(obj->value.string.base, contents, len); + obj->value.string.base[len] = '\0'; + + *ret = obj; + cleanup: + return (result); +} + +static isc_result_t +parse_qstring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + + CHECK(cfg_gettoken(pctx, QSTRING)); + if (pctx->token.type != isc_tokentype_qstring) { + parser_error(pctx, LOG_NEAR, "expected quoted string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (create_string(pctx, + pctx->token.value.as_pointer, + &cfg_type_qstring, + ret)); + cleanup: + return (result); +} + +static isc_result_t +parse_ustring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + + CHECK(cfg_gettoken(pctx, 0)); + if (pctx->token.type != isc_tokentype_string) { + parser_error(pctx, LOG_NEAR, "expected unquoted string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (create_string(pctx, + pctx->token.value.as_pointer, + &cfg_type_ustring, + ret)); + cleanup: + return (result); +} + +static isc_result_t +parse_astring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + + CHECK(cfg_getstringtoken(pctx)); + return (create_string(pctx, + pctx->token.value.as_pointer, + &cfg_type_qstring, + ret)); + cleanup: + return (result); +} + +static isc_boolean_t +is_enum(const char *s, const char *const *enums) { + const char * const *p; + for (p = enums; *p != NULL; p++) { + if (strcasecmp(*p, s) == 0) + return (ISC_TRUE); + } + return (ISC_FALSE); +} + +static isc_result_t +check_enum(cfg_parser_t *pctx, cfg_obj_t *obj, const char *const *enums) { + const char *s = obj->value.string.base; + if (is_enum(s, enums)) + return (ISC_R_SUCCESS); + parser_error(pctx, 0, "'%s' unexpected", s); + return (ISC_R_UNEXPECTEDTOKEN); +} + +static isc_result_t +parse_enum(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + CHECK(parse_ustring(pctx, NULL, &obj)); + CHECK(check_enum(pctx, obj, type->of)); + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +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) +{ + isc_result_t result; + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string && + is_enum(pctx->token.value.as_pointer, enumtype->of)) { + CHECK(parse_enum(pctx, enumtype, ret)); + } else { + CHECK(parse(pctx, othertype, ret)); + } + cleanup: + return (result); +} + + +/* + * Print a string object. + */ +static void +print_ustring(cfg_printer_t *pctx, cfg_obj_t *obj) { + print(pctx, obj->value.string.base, obj->value.string.length); +} + +static void +print_qstring(cfg_printer_t *pctx, cfg_obj_t *obj) { + print(pctx, "\"", 1); + print_ustring(pctx, obj); + print(pctx, "\"", 1); +} + +static void +free_string(cfg_parser_t *pctx, cfg_obj_t *obj) { + isc_mem_put(pctx->mctx, obj->value.string.base, + obj->value.string.length + 1); +} + +isc_boolean_t +cfg_obj_isstring(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_string)); +} + +char * +cfg_obj_asstring(cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_string); + return (obj->value.string.base); +} + +isc_boolean_t +cfg_obj_isboolean(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_boolean)); +} + +isc_boolean_t +cfg_obj_asboolean(cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_boolean); + return (obj->value.boolean); +} + +/* Quoted string only */ +static cfg_type_t cfg_type_qstring = { + "quoted_string", parse_qstring, print_qstring, &cfg_rep_string, NULL }; + +/* Unquoted string only */ +static cfg_type_t cfg_type_ustring = { + "string", parse_ustring, print_ustring, &cfg_rep_string, NULL }; + +/* Any string (quoted or unquoted); printed with quotes */ +static cfg_type_t cfg_type_astring = { + "string", parse_astring, print_qstring, &cfg_rep_string, NULL }; + + +/* + * boolean + */ +static isc_result_t +parse_boolean(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + isc_boolean_t value; + cfg_obj_t *obj = NULL; + UNUSED(type); + + result = cfg_gettoken(pctx, 0); + if (result != ISC_R_SUCCESS) + return (result); + + if (pctx->token.type != isc_tokentype_string) + goto bad_boolean; + + if ((strcasecmp(pctx->token.value.as_pointer, "true") == 0) || + (strcasecmp(pctx->token.value.as_pointer, "yes") == 0) || + (strcmp(pctx->token.value.as_pointer, "1") == 0)) { + value = ISC_TRUE; + } else if ((strcasecmp(pctx->token.value.as_pointer, "false") == 0) || + (strcasecmp(pctx->token.value.as_pointer, "no") == 0) || + (strcmp(pctx->token.value.as_pointer, "0") == 0)) { + value = ISC_FALSE; + } else { + goto bad_boolean; + } + + CHECK(create_cfgobj(pctx, &cfg_type_boolean, &obj)); + obj->value.boolean = value; + *ret = obj; + return (result); + + bad_boolean: + parser_error(pctx, LOG_NEAR, "boolean expected"); + return (ISC_R_UNEXPECTEDTOKEN); + + cleanup: + return (result); +} + +static void +print_boolean(cfg_printer_t *pctx, cfg_obj_t *obj) { + if (obj->value.boolean) + print(pctx, "yes", 3); + else + print(pctx, "no", 2); +} + +static cfg_type_t cfg_type_boolean = { + "boolean", parse_boolean, print_boolean, &cfg_rep_boolean, NULL }; + +static const char *dialup_enums[] = { + "notify", "notify-passive", "refresh", "passive", NULL }; +static isc_result_t +parse_dialup_type(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_enum_or_other(pctx, type, &cfg_type_boolean, ret)); +} +static cfg_type_t cfg_type_dialuptype = { + "dialuptype", parse_dialup_type, print_ustring, + &cfg_rep_string, dialup_enums +}; + +static const char *notify_enums[] = { "explicit", NULL }; +static isc_result_t +parse_notify_type(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_enum_or_other(pctx, type, &cfg_type_boolean, ret)); +} +static cfg_type_t cfg_type_notifytype = { + "notifytype", parse_notify_type, print_ustring, + &cfg_rep_string, notify_enums, +}; + +static keyword_type_t key_kw = { "key", &cfg_type_astring }; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_keyref = { + "keyref", parse_keyvalue, print_keyvalue, + &cfg_rep_string, &key_kw +}; + +static cfg_type_t cfg_type_optional_keyref = { + "optional_keyref", parse_optional_keyvalue, print_keyvalue, + &cfg_rep_string, &key_kw +}; + + +/* + * Lists. + */ + +static isc_result_t +create_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **obj) { + isc_result_t result; + CHECK(create_cfgobj(pctx, type, obj)); + ISC_LIST_INIT((*obj)->value.list); + cleanup: + return (result); +} + +static isc_result_t +create_listelt(cfg_parser_t *pctx, cfg_listelt_t **eltp) { + cfg_listelt_t *elt; + elt = isc_mem_get(pctx->mctx, sizeof(*elt)); + if (elt == NULL) + return (ISC_R_NOMEMORY); + elt->obj = NULL; + ISC_LINK_INIT(elt, link); + *eltp = elt; + return (ISC_R_SUCCESS); +} + +static void +free_list_elt(cfg_parser_t *pctx, cfg_listelt_t *elt) { + cfg_obj_destroy(pctx, &elt->obj); + isc_mem_put(pctx->mctx, elt, sizeof(*elt)); +} + +static void +free_list(cfg_parser_t *pctx, cfg_obj_t *obj) { + cfg_listelt_t *elt, *next; + for (elt = ISC_LIST_HEAD(obj->value.list); + elt != NULL; + elt = next) + { + next = ISC_LIST_NEXT(elt, link); + free_list_elt(pctx, elt); + } +} + +static isc_result_t +parse_list_elt(cfg_parser_t *pctx, const cfg_type_t *elttype, + cfg_listelt_t **ret) +{ + isc_result_t result; + cfg_listelt_t *elt = NULL; + cfg_obj_t *value = NULL; + + CHECK(create_listelt(pctx, &elt)); + + result = parse(pctx, elttype, &value); + if (result != ISC_R_SUCCESS) + goto cleanup; + + elt->obj = value; + + *ret = elt; + return (ISC_R_SUCCESS); + + cleanup: + isc_mem_put(pctx->mctx, elt, sizeof(*elt)); + return (result); +} + +/* + * Parse a homogeneous list whose elements are of type 'elttype' + * and where each element is terminated by a semicolon. + */ +static isc_result_t +parse_list(cfg_parser_t *pctx, const cfg_type_t *listtype, cfg_obj_t **ret) +{ + cfg_obj_t *listobj = NULL; + const cfg_type_t *listof = listtype->of; + isc_result_t result; + + CHECK(create_list(pctx, listtype, &listobj)); + + for (;;) { + cfg_listelt_t *elt = NULL; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == '}') + break; + CHECK(parse_list_elt(pctx, listof, &elt)); + CHECK(parse_semicolon(pctx)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + } + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(listobj); + return (result); +} + +static void +print_list(cfg_printer_t *pctx, cfg_obj_t *obj) { + cfg_list_t *list = &obj->value.list; + cfg_listelt_t *elt; + + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) { + print_indent(pctx); + print_obj(pctx, elt->obj); + print(pctx, ";\n", 2); + } +} + +static isc_result_t +parse_bracketed_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + CHECK(parse_special(pctx, '{')); + CHECK(parse_list(pctx, type, ret)); + CHECK(parse_special(pctx, '}')); + cleanup: + return (result); +} + +static void +print_bracketed_list(cfg_printer_t *pctx, cfg_obj_t *obj) { + print_open(pctx); + print_list(pctx, obj); + print_close(pctx); +} + +/* + * Parse a homogeneous list whose elements are of type 'elttype' + * and where elements are separated by space. The list ends + * before the first semicolon. + */ +static isc_result_t +parse_spacelist(cfg_parser_t *pctx, const cfg_type_t *listtype, cfg_obj_t **ret) +{ + cfg_obj_t *listobj = NULL; + const cfg_type_t *listof = listtype->of; + isc_result_t result; + + CHECK(create_list(pctx, listtype, &listobj)); + + for (;;) { + cfg_listelt_t *elt = NULL; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == ';') + break; + CHECK(parse_list_elt(pctx, listof, &elt)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + } + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(listobj); + return (result); +} + +static void +print_spacelist(cfg_printer_t *pctx, cfg_obj_t *obj) { + cfg_list_t *list = &obj->value.list; + cfg_listelt_t *elt; + + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) { + print_obj(pctx, elt->obj); + if (ISC_LIST_NEXT(elt, link) != NULL) + print(pctx, " ", 1); + } +} + +isc_boolean_t +cfg_obj_islist(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_list)); +} + +cfg_listelt_t * +cfg_list_first(cfg_obj_t *obj) { + REQUIRE(obj == NULL || obj->type->rep == &cfg_rep_list); + if (obj == NULL) + return (NULL); + return (ISC_LIST_HEAD(obj->value.list)); +} + +cfg_listelt_t * +cfg_list_next(cfg_listelt_t *elt) { + REQUIRE(elt != NULL); + return (ISC_LIST_NEXT(elt, link)); +} + +cfg_obj_t * +cfg_listelt_value(cfg_listelt_t *elt) { + REQUIRE(elt != NULL); + return (elt->obj); +} + +/* + * Maps. + */ + +/* + * Parse a map body. That's something like + * + * "foo 1; bar { glub; }; zap true; zap false;" + * + * i.e., a sequence of option names followed by values and + * terminated by semicolons. Used for the top level of + * the named.conf syntax, as well as for the body of the + * options, view, zone, and other statements. + */ +static isc_result_t +parse_mapbody(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + const cfg_clausedef_t * const *clausesets = type->of; + isc_result_t result; + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + cfg_obj_t *value = NULL; + cfg_obj_t *obj = NULL; + cfg_obj_t *eltobj = NULL; + cfg_obj_t *includename = NULL; + isc_symvalue_t symval; + cfg_list_t *list = NULL; + + CHECK(create_map(pctx, type, &obj)); + + obj->value.map.clausesets = clausesets; + + for (;;) { + cfg_listelt_t *elt; + + redo: + /* + * Parse the option name and see if it is known. + */ + CHECK(cfg_gettoken(pctx, 0)); + + if (pctx->token.type != isc_tokentype_string) { + cfg_ungettoken(pctx); + break; + } + + /* + * We accept "include" statements wherever a map body + * clause can occur. + */ + if (strcasecmp(pctx->token.value.as_pointer, "include") == 0) { + /* + * Turn the file name into a temporary configuration + * object just so that it is not overwritten by the + * semicolon token. + */ + CHECK(parse(pctx, &cfg_type_qstring, &includename)); + CHECK(parse_semicolon(pctx)); + CHECK(parser_openfile(pctx, includename-> + value.string.base)); + cfg_obj_destroy(pctx, &includename); + goto redo; + } + + clause = NULL; + for (clauseset = clausesets; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; + clause->name != NULL; + clause++) { + if (strcasecmp(pctx->token.value.as_pointer, + clause->name) == 0) + goto done; + } + } + done: + if (clause == NULL || clause->name == NULL) { + parser_error(pctx, LOG_NOPREP, "unknown option"); + /* + * Try to recover by parsing this option as an unknown + * option and discarding it. + */ + CHECK(parse(pctx, &cfg_type_unsupported, &eltobj)); + cfg_obj_destroy(pctx, &eltobj); + CHECK(parse_semicolon(pctx)); + continue; + } + + /* Clause is known. */ + + /* Issue warnings if appropriate */ + if ((clause->flags & CFG_CLAUSEFLAG_OBSOLETE) != 0) + parser_warning(pctx, 0, "option '%s' is obsolete", + clause->name); + if ((clause->flags & CFG_CLAUSEFLAG_NOTIMP) != 0) + parser_warning(pctx, 0, "option '%s' is " + "not implemented", clause->name); + if ((clause->flags & CFG_CLAUSEFLAG_NYI) != 0) + parser_warning(pctx, 0, "option '%s' is " + "not implemented", clause->name); + /* + * Don't log options with CFG_CLAUSEFLAG_NEWDEFAULT + * set here - we need to log the *lack* of such an option, + * not its presence. + */ + + /* See if the clause already has a value; if not create one. */ + result = isc_symtab_lookup(obj->value.map.symtab, + clause->name, 0, &symval); + + if ((clause->flags & CFG_CLAUSEFLAG_MULTI) != 0) { + /* Multivalued clause */ + cfg_obj_t *listobj = NULL; + if (result == ISC_R_NOTFOUND) { + CHECK(create_list(pctx, + &cfg_type_implicitlist, + &listobj)); + symval.as_pointer = listobj; + result = isc_symtab_define(obj->value. + map.symtab, + clause->name, + 1, symval, + isc_symexists_reject); + if (result != ISC_R_SUCCESS) { + parser_error(pctx, LOG_NEAR, + "isc_symtab_define(%s) " + "failed", clause->name); + isc_mem_put(pctx->mctx, list, + sizeof(cfg_list_t)); + goto cleanup; + } + } else { + INSIST(result == ISC_R_SUCCESS); + listobj = symval.as_pointer; + } + + elt = NULL; + CHECK(parse_list_elt(pctx, clause->type, &elt)); + CHECK(parse_semicolon(pctx)); + + ISC_LIST_APPEND(listobj->value.list, elt, link); + } else { + /* Single-valued clause */ + if (result == ISC_R_NOTFOUND) { + isc_boolean_t callback = + ISC_TF((clause->flags & + CFG_CLAUSEFLAG_CALLBACK) != 0); + CHECK(parse_symtab_elt(pctx, clause->name, + clause->type, + obj->value.map.symtab, + callback)); + CHECK(parse_semicolon(pctx)); + } else if (result == ISC_R_SUCCESS) { + parser_error(pctx, LOG_NEAR, "'%s' redefined", + clause->name); + result = ISC_R_EXISTS; + goto cleanup; + } else { + parser_error(pctx, LOG_NEAR, + "isc_symtab_define() failed"); + goto cleanup; + } + } + } + + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(value); + CLEANUP_OBJ(obj); + CLEANUP_OBJ(eltobj); + CLEANUP_OBJ(includename); + return (result); +} + +static isc_result_t +parse_symtab_elt(cfg_parser_t *pctx, const char *name, + cfg_type_t *elttype, isc_symtab_t *symtab, + isc_boolean_t callback) +{ + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_symvalue_t symval; + + CHECK(parse(pctx, elttype, &obj)); + + if (callback && pctx->callback != NULL) + CHECK(pctx->callback(name, obj, pctx->callbackarg)); + + symval.as_pointer = obj; + CHECK(isc_symtab_define(symtab, name, + 1, symval, + isc_symexists_reject)); + obj = NULL; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +/* + * Parse a map; e.g., "{ foo 1; bar { glub; }; zap true; zap false; }" + */ +static isc_result_t +parse_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + CHECK(parse_special(pctx, '{')); + CHECK(parse_mapbody(pctx, type, ret)); + CHECK(parse_special(pctx, '}')); + cleanup: + return (result); +} + +/* + * Subroutine for parse_named_map() and parse_addressed_map(). + */ +static isc_result_t +parse_any_named_map(cfg_parser_t *pctx, cfg_type_t *nametype, const cfg_type_t *type, + cfg_obj_t **ret) +{ + isc_result_t result; + cfg_obj_t *idobj = NULL; + cfg_obj_t *mapobj = NULL; + + CHECK(parse(pctx, nametype, &idobj)); + CHECK(parse_map(pctx, type, &mapobj)); + mapobj->value.map.id = idobj; + idobj = NULL; + *ret = mapobj; + cleanup: + CLEANUP_OBJ(idobj); + return (result); +} + +/* + * Parse a map identified by a string name. E.g., "name { foo 1; }". + * Used for the "key" and "channel" statements. + */ +static isc_result_t +parse_named_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_any_named_map(pctx, &cfg_type_astring, type, ret)); +} + +/* + * Parse a map identified by a network address. + * Used for the "server" statement. + */ +static isc_result_t +parse_addressed_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_any_named_map(pctx, &cfg_type_netaddr, type, ret)); +} + +static void +print_mapbody(cfg_printer_t *pctx, cfg_obj_t *obj) { + isc_result_t result = ISC_R_SUCCESS; + + const cfg_clausedef_t * const *clauseset; + + for (clauseset = obj->value.map.clausesets; + *clauseset != NULL; + clauseset++) + { + isc_symvalue_t symval; + const cfg_clausedef_t *clause; + + for (clause = *clauseset; + clause->name != NULL; + clause++) { + result = isc_symtab_lookup(obj->value.map.symtab, + clause->name, 0, &symval); + if (result == ISC_R_SUCCESS) { + cfg_obj_t *obj = symval.as_pointer; + if (obj->type == &cfg_type_implicitlist) { + /* Multivalued. */ + cfg_list_t *list = &obj->value.list; + cfg_listelt_t *elt; + for (elt = ISC_LIST_HEAD(*list); + elt != NULL; + elt = ISC_LIST_NEXT(elt, link)) { + print_indent(pctx); + print_cstr(pctx, clause->name); + print(pctx, " ", 1); + print_obj(pctx, elt->obj); + print(pctx, ";\n", 2); + } + } else { + /* Single-valued. */ + print_indent(pctx); + print_cstr(pctx, clause->name); + print(pctx, " ", 1); + print_obj(pctx, obj); + print(pctx, ";\n", 2); + } + } else if (result == ISC_R_NOTFOUND) { + ; /* do nothing */ + } else { + INSIST(0); + } + } + } +} + +static void +print_map(cfg_printer_t *pctx, cfg_obj_t *obj) { + if (obj->value.map.id != NULL) { + print_obj(pctx, obj->value.map.id); + print(pctx, " ", 1); + } + print_open(pctx); + print_mapbody(pctx, obj); + print_close(pctx); +} + +isc_boolean_t +cfg_obj_ismap(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_map)); +} + +isc_result_t +cfg_map_get(cfg_obj_t *mapobj, const char* name, cfg_obj_t **obj) { + isc_result_t result; + isc_symvalue_t val; + cfg_map_t *map; + + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + REQUIRE(name != NULL); + REQUIRE(obj != NULL && *obj == NULL); + + map = &mapobj->value.map; + + result = isc_symtab_lookup(map->symtab, name, MAP_SYM, &val); + if (result != ISC_R_SUCCESS) + return (result); + *obj = val.as_pointer; + return (ISC_R_SUCCESS); +} + +cfg_obj_t * +cfg_map_getname(cfg_obj_t *mapobj) { + REQUIRE(mapobj != NULL && mapobj->type->rep == &cfg_rep_map); + return (mapobj->value.map.id); +} + + +/* Parse an arbitrary token, storing its raw text representation. */ +static isc_result_t +parse_token(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *obj = NULL; + isc_result_t result; + isc_region_t r; + + UNUSED(type); + + CHECK(create_cfgobj(pctx, &cfg_type_token, &obj)); + CHECK(cfg_gettoken(pctx, QSTRING)); + if (pctx->token.type == isc_tokentype_eof) { + cfg_ungettoken(pctx); + result = ISC_R_EOF; + goto cleanup; + } + + isc_lex_getlasttokentext(pctx->lexer, &pctx->token, &r); + + obj->value.string.base = isc_mem_get(pctx->mctx, r.length + 1); + obj->value.string.length = r.length; + memcpy(obj->value.string.base, r.base, r.length); + obj->value.string.base[r.length] = '\0'; + *ret = obj; + + cleanup: + return (result); +} + +static cfg_type_t cfg_type_token = { + "token", parse_token, print_ustring, &cfg_rep_string, NULL }; + +/* + * An unsupported option. This is just a list of tokens with balanced braces + * ending in a semicolon. + */ + +static isc_result_t +parse_unsupported(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *listobj = NULL; + isc_result_t result; + int braces = 0; + + CHECK(create_list(pctx, type, &listobj)); + + for (;;) { + cfg_listelt_t *elt = NULL; + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special) { + if (pctx->token.value.as_char == '{') + braces++; + else if (pctx->token.value.as_char == '}') + braces--; + else if (pctx->token.value.as_char == ';') + if (braces == 0) + break; + } + if (pctx->token.type == isc_tokentype_eof || braces < 0) { + parser_error(pctx, LOG_NEAR, "unexpected token"); + result = ISC_R_UNEXPECTEDTOKEN; + goto cleanup; + } + + CHECK(parse_list_elt(pctx, &cfg_type_token, &elt)); + ISC_LIST_APPEND(listobj->value.list, elt, link); + } + INSIST(braces == 0); + *ret = listobj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(listobj); + return (result); +} + +static cfg_type_t cfg_type_unsupported = { + "unsupported", parse_unsupported, print_spacelist, + &cfg_rep_list, NULL +}; + +/* + * A "controls" statement is represented as a map with the multivalued + * "inet" and "unix" clauses. Inet controls are tuples; unix controls + * are cfg_unsupported_t objects. + */ + +static keyword_type_t controls_allow_kw = { + "allow", &cfg_type_bracketed_aml }; +static cfg_type_t cfg_type_controls_allow = { + "controls_allow", parse_keyvalue, + print_keyvalue, &cfg_rep_list, &controls_allow_kw +}; + +static keyword_type_t controls_keys_kw = { + "keys", &cfg_type_keylist }; +static cfg_type_t cfg_type_controls_keys = { + "controls_keys", parse_optional_keyvalue, + print_keyvalue, &cfg_rep_list, &controls_keys_kw +}; + +static cfg_tuplefielddef_t inetcontrol_fields[] = { + { "address", &cfg_type_controls_sockaddr, 0 }, + { "allow", &cfg_type_controls_allow, 0 }, + { "keys", &cfg_type_controls_keys, 0 }, + { NULL, NULL, 0 } +}; +static cfg_type_t cfg_type_inetcontrol = { + "inetcontrol", parse_tuple, print_tuple, &cfg_rep_tuple, + inetcontrol_fields +}; + +static cfg_clausedef_t +controls_clauses[] = { + { "inet", &cfg_type_inetcontrol, CFG_CLAUSEFLAG_MULTI }, + { "unix", &cfg_type_unsupported, + CFG_CLAUSEFLAG_MULTI|CFG_CLAUSEFLAG_NOTIMP }, + { NULL, NULL, 0 } +}; +static cfg_clausedef_t * +controls_clausesets[] = { + controls_clauses, + NULL +}; +static cfg_type_t cfg_type_controls = { + "controls", parse_map, print_map, &cfg_rep_map, &controls_clausesets +}; + +/* + * An optional class, as used in view and zone statements. + */ +static isc_result_t +parse_optional_class(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string) + CHECK(parse(pctx, &cfg_type_ustring, ret)); + else + CHECK(parse(pctx, &cfg_type_void, ret)); + cleanup: + return (result); +} + +static cfg_type_t cfg_type_optional_class = { + "optional_class", parse_optional_class, NULL, NULL, NULL }; + + +/* + * Try interpreting the current token as a network address. + * + * If WILDOK is set in flags, "*" can be used as a wildcard + * and at least one of V4OK and V6OK must also be set. The + * "*" is interpreted as the IPv4 wildcard address if V4OK is + * set (including the case where V4OK and V6OK are both set), + * and the IPv6 wildcard address otherwise. + */ +static isc_result_t +token_addr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na) { + char *s; + struct in_addr in4a; + struct in6_addr in6a; + + if (pctx->token.type != isc_tokentype_string) + return (ISC_R_UNEXPECTEDTOKEN); + + s = pctx->token.value.as_pointer; + if ((flags & WILDOK) != 0 && strcmp(s, "*") == 0) { + if ((flags & V4OK) != 0) { + isc_netaddr_any(na); + return (ISC_R_SUCCESS); + } else if ((flags & V6OK) != 0) { + isc_netaddr_any6(na); + return (ISC_R_SUCCESS); + } else { + INSIST(0); + } + } else { + if ((flags & (V4OK | V4PREFIXOK)) != 0) { + if (inet_pton(AF_INET, s, &in4a) == 1) { + isc_netaddr_fromin(na, &in4a); + return (ISC_R_SUCCESS); + } + } + if ((flags & V4PREFIXOK) != 0 && + strlen(s) <= 15) { + char buf[64]; + int i; + + strcpy(buf, s); + for (i = 0; i < 3; i++) { + strcat(buf, ".0"); + if (inet_pton(AF_INET, buf, &in4a) == 1) { + isc_netaddr_fromin(na, &in4a); + return (ISC_R_SUCCESS); + } + } + } + if (flags & V6OK) { + if (inet_pton(AF_INET6, s, &in6a) == 1) { + isc_netaddr_fromin6(na, &in6a); + return (ISC_R_SUCCESS); + } + } + } + return (ISC_R_UNEXPECTEDTOKEN); +} + +static isc_result_t +get_addr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na) { + isc_result_t result; + CHECK(cfg_gettoken(pctx, 0)); + result = token_addr(pctx, flags, na); + if (result == ISC_R_UNEXPECTEDTOKEN) + parser_error(pctx, LOG_NEAR, "expected IP address"); + cleanup: + return (result); +} + +static isc_boolean_t +looking_at_netaddr(cfg_parser_t *pctx, unsigned int flags) { + isc_result_t result; + isc_netaddr_t na_dummy; + result = token_addr(pctx, flags, &na_dummy); + return (ISC_TF(result == ISC_R_SUCCESS)); +} + +static isc_result_t +get_port(cfg_parser_t *pctx, unsigned int flags, in_port_t *port) { + isc_result_t result; + + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER)); + + if ((flags & WILDOK) != 0 && + pctx->token.type == isc_tokentype_string && + strcmp(pctx->token.value.as_pointer, "*") == 0) { + *port = 0; + return (ISC_R_SUCCESS); + } + if (pctx->token.type != isc_tokentype_number) { + parser_error(pctx, LOG_NEAR, + "expected port number or '*'"); + return (ISC_R_UNEXPECTEDTOKEN); + } + if (pctx->token.value.as_ulong >= 65536) { + parser_error(pctx, LOG_NEAR, + "port number out of range"); + return (ISC_R_UNEXPECTEDTOKEN); + } + *port = (in_port_t)(pctx->token.value.as_ulong); + return (ISC_R_SUCCESS); + cleanup: + return (result); +} + +static isc_result_t +parse_querysource(cfg_parser_t *pctx, int flags, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_netaddr_t netaddr; + in_port_t port; + unsigned int have_address = 0; + unsigned int have_port = 0; + + if ((flags & V4OK) != 0) + isc_netaddr_any(&netaddr); + else if ((flags & V6OK) != 0) + isc_netaddr_any6(&netaddr); + else + INSIST(0); + + port = 0; + + CHECK(create_cfgobj(pctx, &cfg_type_querysource, &obj)); + for (;;) { + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string) { + if (strcasecmp(pctx->token.value.as_pointer, + "address") == 0) + { + /* read "address" */ + CHECK(cfg_gettoken(pctx, 0)); + CHECK(get_addr(pctx, flags|WILDOK, &netaddr)); + have_address++; + } else if (strcasecmp(pctx->token.value.as_pointer, + "port") == 0) + { + /* read "port" */ + CHECK(cfg_gettoken(pctx, 0)); + CHECK(get_port(pctx, WILDOK, &port)); + have_port++; + } else { + parser_error(pctx, LOG_NEAR, + "expected 'address' or 'port'"); + return (ISC_R_UNEXPECTEDTOKEN); + } + } else + break; + } + if (have_address > 1 || have_port > 1 || + have_address + have_port == 0) { + parser_error(pctx, 0, "expected one address and/or port"); + return (ISC_R_UNEXPECTEDTOKEN); + } + + isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, port); + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + parser_error(pctx, LOG_NEAR, "invalid query source"); + CLEANUP_OBJ(obj); + return (result); +} + +static isc_result_t +parse_querysource4(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + UNUSED(type); + return (parse_querysource(pctx, V4OK, ret)); +} + +static isc_result_t +parse_querysource6(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + UNUSED(type); + return (parse_querysource(pctx, V6OK, ret)); +} + +static void +print_isc_netaddr(cfg_printer_t *pctx, isc_netaddr_t *na) { + isc_result_t result; + char text[128]; + isc_buffer_t buf; + + isc_buffer_init(&buf, text, sizeof(text)); + result = isc_netaddr_totext(na, &buf); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + print(pctx, isc_buffer_base(&buf), isc_buffer_usedlength(&buf)); +} + +static void +print_querysource(cfg_printer_t *pctx, cfg_obj_t *obj) { + isc_netaddr_t na; + isc_netaddr_fromsockaddr(&na, &obj->value.sockaddr); + print(pctx, "address ", 8); + print_isc_netaddr(pctx, &na); + print(pctx, " port ", 6); + print_uint(pctx, isc_sockaddr_getport(&obj->value.sockaddr)); +} + +static cfg_type_t cfg_type_querysource4 = { + "querysource4", parse_querysource4, NULL, NULL, NULL }; +static cfg_type_t cfg_type_querysource6 = { + "querysource6", parse_querysource6, NULL, NULL, NULL }; +static cfg_type_t cfg_type_querysource = { + "querysource", NULL, print_querysource, &cfg_rep_sockaddr, NULL }; + +/* netaddr */ + +static isc_result_t +parse_netaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + isc_netaddr_t netaddr; + UNUSED(type); + CHECK(create_cfgobj(pctx, type, &obj)); + CHECK(get_addr(pctx, V4OK|V6OK, &netaddr)); + isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, 0); + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static cfg_type_t cfg_type_netaddr = { + "netaddr", parse_netaddr, print_sockaddr, &cfg_rep_sockaddr, NULL }; + +/* netprefix */ + +static isc_result_t +parse_netprefix(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *obj = NULL; + isc_result_t result; + isc_netaddr_t netaddr; + unsigned int addrlen, prefixlen; + UNUSED(type); + + CHECK(get_addr(pctx, V4OK|V4PREFIXOK|V6OK, &netaddr)); + switch (netaddr.family) { + case AF_INET: + addrlen = 32; + break; + case AF_INET6: + addrlen = 128; + break; + default: + addrlen = 0; + INSIST(0); + break; + } + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == '/') { + CHECK(cfg_gettoken(pctx, 0)); /* read "/" */ + CHECK(cfg_gettoken(pctx, ISC_LEXOPT_NUMBER)); + if (pctx->token.type != isc_tokentype_number) { + parser_error(pctx, LOG_NEAR, + "expected prefix length"); + return (ISC_R_UNEXPECTEDTOKEN); + } + prefixlen = pctx->token.value.as_ulong; + if (prefixlen > addrlen) { + parser_error(pctx, LOG_NOPREP, + "invalid prefix length"); + return (ISC_R_RANGE); + } + } else { + prefixlen = addrlen; + } + CHECK(create_cfgobj(pctx, &cfg_type_netprefix, &obj)); + obj->value.netprefix.address = netaddr; + obj->value.netprefix.prefixlen = prefixlen; + *ret = obj; + return (ISC_R_SUCCESS); + cleanup: + parser_error(pctx, LOG_NEAR, "expected network prefix"); + return (result); +} + +static void +print_netprefix(cfg_printer_t *pctx, cfg_obj_t *obj) { + cfg_netprefix_t *p = &obj->value.netprefix; + print_isc_netaddr(pctx, &p->address); + print(pctx, "/", 1); + print_uint(pctx, p->prefixlen); +} + +isc_boolean_t +cfg_obj_isnetprefix(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_netprefix)); +} + +void +cfg_obj_asnetprefix(cfg_obj_t *obj, isc_netaddr_t *netaddr, + unsigned int *prefixlen) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_netprefix); + *netaddr = obj->value.netprefix.address; + *prefixlen = obj->value.netprefix.prefixlen; +} + +static cfg_type_t cfg_type_netprefix = { + "netprefix", parse_netprefix, print_netprefix, &cfg_rep_netprefix, NULL }; + +/* addrmatchelt */ + +static isc_result_t +parse_addrmatchelt(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + + CHECK(cfg_peektoken(pctx, QSTRING)); + + if (pctx->token.type == isc_tokentype_string || + pctx->token.type == isc_tokentype_qstring) { + if (pctx->token.type == isc_tokentype_string && + (strcasecmp(pctx->token.value.as_pointer, "key") == 0)) { + CHECK(parse(pctx, &cfg_type_keyref, ret)); + } else { + if (looking_at_netaddr(pctx, V4OK|V4PREFIXOK|V6OK)) { + CHECK(parse_netprefix(pctx, NULL, ret)); + } else { + CHECK(parse_astring(pctx, NULL, ret)); + } + } + } else if (pctx->token.type == isc_tokentype_special) { + if (pctx->token.value.as_char == '{') { + /* Nested match list. */ + CHECK(parse(pctx, &cfg_type_bracketed_aml, ret)); + } else if (pctx->token.value.as_char == '!') { + CHECK(cfg_gettoken(pctx, 0)); /* read "!" */ + CHECK(parse(pctx, &cfg_type_negated, ret)); + } else { + goto bad; + } + } else { + bad: + parser_error(pctx, LOG_NEAR, + "expected IP match list element"); + return (ISC_R_UNEXPECTEDTOKEN); + } + cleanup: + return (result); +} + +/* + * A negated address match list element (like "! 10.0.0.1"). + * Somewhat sneakily, the caller is expected to parse the + * "!", but not to print it. + */ + +static cfg_tuplefielddef_t negated_fields[] = { + { "value", &cfg_type_addrmatchelt, 0 }, + { NULL, NULL, 0 } +}; + +static void +print_negated(cfg_printer_t *pctx, cfg_obj_t *obj) { + print(pctx, "!", 1); + print_tuple(pctx, obj); +} + +static cfg_type_t cfg_type_negated = { + "negated", parse_tuple, print_negated, &cfg_rep_tuple, + &negated_fields +}; + +/* an address match list element */ + +static cfg_type_t cfg_type_addrmatchelt = { + "address_match_element", parse_addrmatchelt, NULL, NULL, NULL }; +static cfg_type_t cfg_type_bracketed_aml = { + "bracketed_aml", parse_bracketed_list, print_bracketed_list, + &cfg_rep_list, &cfg_type_addrmatchelt +}; + +static isc_result_t +parse_sockaddrsub(cfg_parser_t *pctx, const cfg_type_t *type, + int flags, cfg_obj_t **ret) +{ + isc_result_t result; + isc_netaddr_t netaddr; + in_port_t port = 0; + cfg_obj_t *obj = NULL; + + CHECK(create_cfgobj(pctx, type, &obj)); + CHECK(get_addr(pctx, flags, &netaddr)); + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string && + strcasecmp(pctx->token.value.as_pointer, "port") == 0) { + CHECK(cfg_gettoken(pctx, 0)); /* read "port" */ + CHECK(get_port(pctx, flags, &port)); + } + isc_sockaddr_fromnetaddr(&obj->value.sockaddr, &netaddr, port); + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static isc_result_t +parse_sockaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + const unsigned int *flagp = type->of; + return (parse_sockaddrsub(pctx, &cfg_type_sockaddr4wild, *flagp, ret)); +} + +static void +print_sockaddr(cfg_printer_t *pctx, cfg_obj_t *obj) { + isc_netaddr_t netaddr; + in_port_t port; + char buf[ISC_NETADDR_FORMATSIZE]; + + isc_netaddr_fromsockaddr(&netaddr, &obj->value.sockaddr); + isc_netaddr_format(&netaddr, buf, sizeof(buf)); + print_cstr(pctx, buf); + port = isc_sockaddr_getport(&obj->value.sockaddr); + if (port != 0) { + print(pctx, " port ", 6); + print_uint(pctx, port); + } +} + +isc_boolean_t +cfg_obj_issockaddr(cfg_obj_t *obj) { + REQUIRE(obj != NULL); + return (ISC_TF(obj->type->rep == &cfg_rep_sockaddr)); +} + +isc_sockaddr_t * +cfg_obj_assockaddr(cfg_obj_t *obj) { + REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_sockaddr); + return (&obj->value.sockaddr); +} + +/* An IPv4/IPv6 address with optional port, "*" accepted as wildcard. */ +static unsigned int sockaddr4wild_flags = WILDOK|V4OK; +static cfg_type_t cfg_type_sockaddr4wild = { + "sockaddr4wild", parse_sockaddr, print_sockaddr, + &cfg_rep_sockaddr, &sockaddr4wild_flags +}; + +static unsigned int sockaddr6wild_flags = WILDOK|V6OK; +static cfg_type_t cfg_type_sockaddr6wild = { + "v6addrportwild", parse_sockaddr, print_sockaddr, + &cfg_rep_sockaddr, &sockaddr6wild_flags +}; + +static unsigned int sockaddr_flags = V4OK|V6OK; +static cfg_type_t cfg_type_sockaddr = { + "sockaddr", parse_sockaddr, print_sockaddr, + &cfg_rep_sockaddr, &sockaddr_flags +}; + +/* + * The socket address syntax in the "controls" statement is silly. + * It allows both socket address families, but also allows "*", + * whis is gratuitously interpreted as the IPv4 wildcard address. + */ +static unsigned int controls_sockaddr_flags = V4OK|V6OK|WILDOK; +static cfg_type_t cfg_type_controls_sockaddr = { + "controls_sockaddr", parse_sockaddr, print_sockaddr, + &cfg_rep_sockaddr, &controls_sockaddr_flags }; + + +/* + * Handle the special kludge syntax of the "keys" clause in the "server" + * statement, which takes a single key with our without braces and semicolon. + */ +static isc_result_t +parse_server_key_kludge(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + isc_boolean_t braces = ISC_FALSE; + UNUSED(type); + + /* Allow opening brace. */ + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == '{') { + result = cfg_gettoken(pctx, 0); + braces = ISC_TRUE; + } + + CHECK(parse(pctx, &cfg_type_astring, ret)); + + if (braces) { + /* Skip semicolon if present. */ + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_special && + pctx->token.value.as_char == ';') + CHECK(cfg_gettoken(pctx, 0)); + + CHECK(parse_special(pctx, '}')); + } + cleanup: + return (result); +} +static cfg_type_t cfg_type_server_key_kludge = { + "server_key", parse_server_key_kludge, NULL, NULL, NULL }; + + +/* + * An optional logging facility. + */ + +static isc_result_t +parse_optional_facility(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) +{ + isc_result_t result; + UNUSED(type); + + CHECK(cfg_peektoken(pctx, QSTRING)); + if (pctx->token.type == isc_tokentype_string || + pctx->token.type == isc_tokentype_qstring) { + CHECK(parse(pctx, &cfg_type_astring, ret)); + } else { + CHECK(parse(pctx, &cfg_type_void, ret)); + } + cleanup: + return (result); +} + +static cfg_type_t cfg_type_optional_facility = { + "optional_facility", parse_optional_facility, NULL, NULL, NULL }; + + +/* + * A log severity. Return as a string, except "debug N", + * which is returned as a keyword object. + */ + +static keyword_type_t debug_kw = { "debug", &cfg_type_uint32 }; +static cfg_type_t cfg_type_debuglevel = { + "debuglevel", parse_keyvalue, + print_keyvalue, &cfg_rep_uint32, &debug_kw +}; + +static isc_result_t +parse_logseverity(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + UNUSED(type); + + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string && + strcasecmp(pctx->token.value.as_pointer, "debug") == 0) { + CHECK(cfg_gettoken(pctx, 0)); /* read "debug" */ + CHECK(cfg_peektoken(pctx, ISC_LEXOPT_NUMBER)); + if (pctx->token.type == isc_tokentype_number) { + CHECK(parse_uint32(pctx, NULL, ret)); + } else { + /* + * The debug level is optional and defaults to 1. + * This makes little sense, but we support it for + * compatibility with BIND 8. + */ + CHECK(create_cfgobj(pctx, &cfg_type_uint32, ret)); + (*ret)->value.uint32 = 1; + } + (*ret)->type = &cfg_type_debuglevel; /* XXX kludge */ + } else { + CHECK(parse(pctx, &cfg_type_loglevel, ret)); + } + cleanup: + return (result); +} + +static cfg_type_t cfg_type_logseverity = { + "logseverity", parse_logseverity, NULL, NULL, NULL }; + +/* + * The "file" clause of the "channel" statement. + * This is yet another special case. + */ + +static const char *logversions_enums[] = { "unlimited", NULL }; +static isc_result_t +parse_logversions(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + return (parse_enum_or_other(pctx, type, &cfg_type_uint32, ret)); +} +static cfg_type_t cfg_type_logversions = { + "logversions", parse_logversions, print_ustring, + &cfg_rep_string, logversions_enums +}; + +static cfg_tuplefielddef_t logfile_fields[] = { + { "file", &cfg_type_qstring, 0 }, + { "versions", &cfg_type_logversions, 0 }, + { "size", &cfg_type_size, 0 }, + { NULL, NULL, 0 } +}; + +static isc_result_t +parse_logfile(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + cfg_obj_t *obj = NULL; + const cfg_tuplefielddef_t *fields = type->of; + + CHECK(create_tuple(pctx, type, &obj)); + + /* Parse the mandatory "file" field */ + CHECK(parse(pctx, fields[0].type, &obj->value.tuple[0])); + + /* Parse "versions" and "size" fields in any order. */ + for (;;) { + CHECK(cfg_peektoken(pctx, 0)); + if (pctx->token.type == isc_tokentype_string) { + CHECK(cfg_gettoken(pctx, 0)); + if (strcasecmp(pctx->token.value.as_pointer, + "versions") == 0 && + obj->value.tuple[1] == NULL) { + CHECK(parse(pctx, fields[1].type, + &obj->value.tuple[1])); + } else if (strcasecmp(pctx->token.value.as_pointer, + "size") == 0 && + obj->value.tuple[2] == NULL) { + CHECK(parse(pctx, fields[2].type, + &obj->value.tuple[2])); + } else { + break; + } + } else { + break; + } + } + + /* Create void objects for missing optional values. */ + if (obj->value.tuple[1] == NULL) + CHECK(parse_void(pctx, NULL, &obj->value.tuple[1])); + if (obj->value.tuple[2] == NULL) + CHECK(parse_void(pctx, NULL, &obj->value.tuple[2])); + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static void +print_logfile(cfg_printer_t *pctx, cfg_obj_t *obj) { + print_obj(pctx, obj->value.tuple[0]); /* file */ + if (obj->value.tuple[1]->type->print != print_void) { + print(pctx, " versions ", 10); + print_obj(pctx, obj->value.tuple[1]); + } + if (obj->value.tuple[2]->type->print != print_void) { + print(pctx, " size ", 6); + print_obj(pctx, obj->value.tuple[2]); + } +} + +static cfg_type_t cfg_type_logfile = { + "logfile", parse_logfile, print_logfile, &cfg_rep_tuple, + logfile_fields +}; + + +/* + * lwres + */ + +static cfg_tuplefielddef_t lwres_view_fields[] = { + { "name", &cfg_type_astring, 0 }, + { "class", &cfg_type_optional_class, 0 }, + { NULL, NULL, 0 } +}; +static cfg_type_t cfg_type_lwres_view = { + "lwres_view", parse_tuple, print_tuple, &cfg_rep_tuple, + lwres_view_fields +}; + +static cfg_type_t cfg_type_lwres_searchlist = { + "lwres_searchlist", parse_bracketed_list, print_bracketed_list, + &cfg_rep_list, &cfg_type_astring }; + +static cfg_clausedef_t +lwres_clauses[] = { + { "listen-on", &cfg_type_portiplist, 0 }, + { "view", &cfg_type_lwres_view, 0 }, + { "search", &cfg_type_lwres_searchlist, 0 }, + { "ndots", &cfg_type_uint32, 0 }, + { NULL, NULL, 0 } +}; + +static cfg_clausedef_t * +lwres_clausesets[] = { + lwres_clauses, + NULL +}; +static cfg_type_t cfg_type_lwres = { + "lwres", parse_map, print_map, &cfg_rep_map, lwres_clausesets }; + +/* + * rndc + */ + +static cfg_clausedef_t +rndcconf_options_clauses[] = { + { "default-server", &cfg_type_astring, 0 }, + { "default-key", &cfg_type_astring, 0 }, + { "default-port", &cfg_type_uint32, 0 }, + { NULL, NULL, 0 } +}; + +static cfg_clausedef_t * +rndcconf_options_clausesets[] = { + rndcconf_options_clauses, + NULL +}; + +static cfg_type_t cfg_type_rndcconf_options = { + "rndcconf_options", parse_map, print_map, &cfg_rep_map, + rndcconf_options_clausesets +}; + +static cfg_clausedef_t +rndcconf_server_clauses[] = { + { "key", &cfg_type_astring, 0 }, + { "port", &cfg_type_uint32, 0 }, + { NULL, NULL, 0 } +}; + +static cfg_clausedef_t * +rndcconf_server_clausesets[] = { + rndcconf_server_clauses, + NULL +}; + +static cfg_type_t cfg_type_rndcconf_server = { + "rndcconf_server", parse_named_map, print_map, &cfg_rep_map, + rndcconf_server_clausesets +}; + +static cfg_clausedef_t +rndcconf_clauses[] = { + { "key", &cfg_type_key, CFG_CLAUSEFLAG_MULTI }, + { "server", &cfg_type_rndcconf_server, CFG_CLAUSEFLAG_MULTI }, + { "options", &cfg_type_rndcconf_options, 0 }, + { NULL, NULL, 0 } +}; + +static cfg_clausedef_t * +rndcconf_clausesets[] = { + rndcconf_clauses, + NULL +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_rndcconf = { + "rndcconf", parse_mapbody, print_mapbody, &cfg_rep_map, + rndcconf_clausesets +}; + +static cfg_clausedef_t +rndckey_clauses[] = { + { "key", &cfg_type_key, 0 }, + { NULL, NULL, 0 } +}; + +static cfg_clausedef_t * +rndckey_clausesets[] = { + rndckey_clauses, + NULL +}; + +LIBISCCFG_EXTERNAL_DATA cfg_type_t cfg_type_rndckey = { + "rndckey", parse_mapbody, print_mapbody, &cfg_rep_map, + rndckey_clausesets +}; + + +static isc_result_t +cfg_gettoken(cfg_parser_t *pctx, int options) { + isc_result_t result; + + if (pctx->seen_eof) + return (ISC_R_SUCCESS); + + options |= (ISC_LEXOPT_EOF | ISC_LEXOPT_NOMORE); + + redo: + pctx->token.type = isc_tokentype_unknown; + result = isc_lex_gettoken(pctx->lexer, options, &pctx->token); + pctx->ungotten = ISC_FALSE; + pctx->line = isc_lex_getsourceline(pctx->lexer); + + switch (result) { + case ISC_R_SUCCESS: + if (pctx->token.type == isc_tokentype_eof) { + result = isc_lex_close(pctx->lexer); + INSIST(result == ISC_R_NOMORE || + result == ISC_R_SUCCESS); + + if (isc_lex_getsourcename(pctx->lexer) != NULL) { + /* + * Closed an included file, not the main file. + */ + cfg_listelt_t *elt; + elt = ISC_LIST_TAIL(pctx->open_files-> + value.list); + INSIST(elt != NULL); + ISC_LIST_UNLINK(pctx->open_files-> + value.list, elt, link); + ISC_LIST_APPEND(pctx->closed_files-> + value.list, elt, link); + goto redo; + } + pctx->seen_eof = ISC_TRUE; + } + break; + + case ISC_R_NOSPACE: + /* More understandable than "ran out of space". */ + parser_error(pctx, LOG_NEAR, "token too big"); + break; + + case ISC_R_IOERROR: + parser_error(pctx, 0, "%s", + isc_result_totext(result)); + break; + + default: + parser_error(pctx, LOG_NEAR, "%s", + isc_result_totext(result)); + break; + } + return (result); +} + +static void +cfg_ungettoken(cfg_parser_t *pctx) { + if (pctx->seen_eof) + return; + isc_lex_ungettoken(pctx->lexer, &pctx->token); + pctx->ungotten = ISC_TRUE; +} + +static isc_result_t +cfg_peektoken(cfg_parser_t *pctx, int options) { + isc_result_t result; + CHECK(cfg_gettoken(pctx, options)); + cfg_ungettoken(pctx); + cleanup: + return (result); +} + +/* + * Get a string token, accepting both the quoted and the unquoted form. + * Log an error if the next token is not a string. + */ +static isc_result_t +cfg_getstringtoken(cfg_parser_t *pctx) { + isc_result_t result; + + result = cfg_gettoken(pctx, QSTRING); + if (result != ISC_R_SUCCESS) + return (result); + + if (pctx->token.type != isc_tokentype_string && + pctx->token.type != isc_tokentype_qstring) { + parser_error(pctx, LOG_NEAR, "expected string"); + return (ISC_R_UNEXPECTEDTOKEN); + } + return (ISC_R_SUCCESS); +} + +static void +parser_error(cfg_parser_t *pctx, unsigned int flags, const char *fmt, ...) { + va_list args; + va_start(args, fmt); + parser_complain(pctx, ISC_FALSE, flags, fmt, args); + va_end(args); + pctx->errors++; +} + +static void +parser_warning(cfg_parser_t *pctx, unsigned int flags, const char *fmt, ...) { + va_list args; + va_start(args, fmt); + parser_complain(pctx, ISC_TRUE, flags, fmt, args); + va_end(args); + pctx->warnings++; +} + +#define MAX_LOG_TOKEN 30 /* How much of a token to quote in log messages. */ + +static char * +current_file(cfg_parser_t *pctx) { + static char none[] = "none"; + cfg_listelt_t *elt; + cfg_obj_t *fileobj; + + if (pctx->open_files == NULL) + return (none); + elt = ISC_LIST_TAIL(pctx->open_files->value.list); + if (elt == NULL) + return (none); + + fileobj = elt->obj; + INSIST(fileobj->type == &cfg_type_qstring); + return (fileobj->value.string.base); +} + +static void +parser_complain(cfg_parser_t *pctx, isc_boolean_t is_warning, + unsigned int flags, const char *format, + va_list args) +{ + char tokenbuf[MAX_LOG_TOKEN + 10]; + static char where[ISC_DIR_PATHMAX + 100]; + static char message[2048]; + int level = ISC_LOG_ERROR; + const char *prep = ""; + + if (is_warning) + level = ISC_LOG_WARNING; + + sprintf(where, "%s:%u: ", current_file(pctx), pctx->line); + + if ((unsigned int)vsprintf(message, format, args) >= sizeof message) + FATAL_ERROR(__FILE__, __LINE__, + "error message would overflow"); + + if ((flags & (LOG_NEAR|LOG_BEFORE|LOG_NOPREP)) != 0) { + isc_region_t r; + + if (pctx->ungotten) + (void)cfg_gettoken(pctx, 0); + + if (pctx->token.type == isc_tokentype_eof) { + snprintf(tokenbuf, sizeof(tokenbuf), "end of file"); + } else if (pctx->token.type == isc_tokentype_unknown) { + flags = 0; + tokenbuf[0] = '\0'; + } else { + isc_lex_getlasttokentext(pctx->lexer, + &pctx->token, &r); + if (r.length > MAX_LOG_TOKEN) + snprintf(tokenbuf, sizeof(tokenbuf), + "'%.*s...'", MAX_LOG_TOKEN, r.base); + else + snprintf(tokenbuf, sizeof(tokenbuf), + "'%.*s'", (int)r.length, r.base); + } + + /* Choose a preposition. */ + if (flags & LOG_NEAR) + prep = " near "; + else if (flags & LOG_BEFORE) + prep = " before "; + else + prep = " "; + } else { + tokenbuf[0] = '\0'; + } + isc_log_write(pctx->lctx, CAT, MOD, level, + "%s%s%s%s", where, message, prep, tokenbuf); +} + +void +cfg_obj_log(cfg_obj_t *obj, isc_log_t *lctx, int level, const char *fmt, ...) { + va_list ap; + char msgbuf[2048]; + + if (! isc_log_wouldlog(lctx, level)) + return; + + va_start(ap, fmt); + + vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap); + isc_log_write(lctx, CAT, MOD, level, + "%s:%u: %s", + obj->file == NULL ? "<unknown file>" : obj->file, + obj->line, msgbuf); + va_end(ap); +} + +static isc_result_t +create_cfgobj(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + cfg_obj_t *obj; + + obj = isc_mem_get(pctx->mctx, sizeof(cfg_obj_t)); + if (obj == NULL) + return (ISC_R_NOMEMORY); + obj->type = type; + obj->file = current_file(pctx); + obj->line = pctx->line; + *ret = obj; + return (ISC_R_SUCCESS); +} + +static void +map_symtabitem_destroy(char *key, unsigned int type, + isc_symvalue_t symval, void *userarg) +{ + cfg_obj_t *obj = symval.as_pointer; + cfg_parser_t *pctx = (cfg_parser_t *)userarg; + + UNUSED(key); + UNUSED(type); + + cfg_obj_destroy(pctx, &obj); +} + + +static isc_result_t +create_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret) { + isc_result_t result; + isc_symtab_t *symtab = NULL; + cfg_obj_t *obj = NULL; + + CHECK(create_cfgobj(pctx, type, &obj)); + CHECK(isc_symtab_create(pctx->mctx, 5, /* XXX */ + map_symtabitem_destroy, + pctx, ISC_FALSE, &symtab)); + + obj->value.map.symtab = symtab; + obj->value.map.id = NULL; + + *ret = obj; + return (ISC_R_SUCCESS); + + cleanup: + CLEANUP_OBJ(obj); + return (result); +} + +static void +free_map(cfg_parser_t *pctx, cfg_obj_t *obj) { + CLEANUP_OBJ(obj->value.map.id); + isc_symtab_destroy(&obj->value.map.symtab); +} + +isc_boolean_t +cfg_obj_istype(cfg_obj_t *obj, const cfg_type_t *type) { + return (ISC_TF(obj->type == type)); +} + +/* + * Destroy 'obj', a configuration object created in 'pctx'. + */ +void +cfg_obj_destroy(cfg_parser_t *pctx, cfg_obj_t **objp) { + cfg_obj_t *obj = *objp; + obj->type->rep->free(pctx, obj); + isc_mem_put(pctx->mctx, obj, sizeof(cfg_obj_t)); + *objp = NULL; +} + +static void +free_noop(cfg_parser_t *pctx, cfg_obj_t *obj) { + UNUSED(pctx); + UNUSED(obj); +} + +/* + * Data and functions for printing grammar summaries. + */ +static struct flagtext { + unsigned int flag; + const char *text; +} flagtexts[] = { + { CFG_CLAUSEFLAG_NOTIMP, "not implemented" }, + { CFG_CLAUSEFLAG_NYI, "not yet implemented" }, + { CFG_CLAUSEFLAG_OBSOLETE, "obsolete" }, + { CFG_CLAUSEFLAG_NEWDEFAULT, "default changed" }, + { 0, NULL } +}; + +static void +print_clause_flags(cfg_printer_t *pctx, unsigned int flags) { + struct flagtext *p; + isc_boolean_t first = ISC_TRUE; + for (p = flagtexts; p->flag != 0; p++) { + if ((flags & p->flag) != 0) { + if (first) + print(pctx, " // ", 4); + else + print(pctx, ", ", 2); + print_cstr(pctx, p->text); + first = ISC_FALSE; + } + } +} + +static void +print_grammar(cfg_printer_t *pctx, const cfg_type_t *type) { + if (type->print == print_mapbody) { + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + + for (clauseset = type->of; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; + clause->name != NULL; + clause++) { + print_cstr(pctx, clause->name); + print(pctx, " ", 1); + print_grammar(pctx, clause->type); + print(pctx, ";", 1); + /* XXX print flags here? */ + print(pctx, "\n\n", 2); + } + } + } else if (type->print == print_map) { + const cfg_clausedef_t * const *clauseset; + const cfg_clausedef_t *clause; + + if (type->parse == parse_named_map) { + print_grammar(pctx, &cfg_type_astring); + print(pctx, " ", 1); + } + + print_open(pctx); + + for (clauseset = type->of; *clauseset != NULL; clauseset++) { + for (clause = *clauseset; + clause->name != NULL; + clause++) { + print_indent(pctx); + print_cstr(pctx, clause->name); + if (clause->type->print != print_void) + print(pctx, " ", 1); + print_grammar(pctx, clause->type); + print(pctx, ";", 1); + print_clause_flags(pctx, clause->flags); + print(pctx, "\n", 1); + } + } + print_close(pctx); + } else if (type->print == print_tuple) { + const cfg_tuplefielddef_t *fields = type->of; + const cfg_tuplefielddef_t *f; + isc_boolean_t need_space = ISC_FALSE; + + for (f = fields; f->name != NULL; f++) { + if (need_space) + print(pctx, " ", 1); + print_grammar(pctx, f->type); + need_space = ISC_TF(f->type->print != print_void); + } + } else if (type->parse == parse_enum) { + const char * const *p; + print(pctx, "( ", 2); + for (p = type->of; *p != NULL; p++) { + print_cstr(pctx, *p); + if (p[1] != NULL) + print(pctx, " | ", 3); + } + print(pctx, " )", 2); + } else if (type->print == print_bracketed_list) { + print(pctx, "{ ", 2); + print_grammar(pctx, type->of); + print(pctx, "; ... }", 7); + } else if (type->parse == parse_keyvalue) { + const keyword_type_t *kw = type->of; + print_cstr(pctx, kw->name); + print(pctx, " ", 1); + print_grammar(pctx, kw->type); + } else if (type->parse == parse_optional_keyvalue) { + const keyword_type_t *kw = type->of; + print(pctx, "[ ", 2); + print_cstr(pctx, kw->name); + print(pctx, " ", 1); + print_grammar(pctx, kw->type); + print(pctx, " ]", 2); + } else if (type->parse == parse_sockaddr) { + const unsigned int *flagp = type->of; + int n = 0; + print(pctx, "( ", 2); + if (*flagp & V4OK) { + if (n != 0) + print(pctx, " | ", 3); + print_cstr(pctx, "<ipv4_address>"); + n++; + } + if (*flagp & V6OK) { + if (n != 0) + print(pctx, " | ", 3); + print_cstr(pctx, "<ipv6_address>"); + n++; + } + if (*flagp & WILDOK) { + if (n != 0) + print(pctx, " | ", 3); + print(pctx, "*", 1); + n++; + } + print(pctx, " ) ", 3); + if (*flagp & WILDOK) { + print_cstr(pctx, "[ port ( <integer> | * ) ]"); + } else { + print_cstr(pctx, "[ port <integer> ]"); + } + } else if (type->print == print_void) { + /* Print nothing. */ + } else { + print(pctx, "<", 1); + print_cstr(pctx, type->name); + print(pctx, ">", 1); + } +} + +void +cfg_print_grammar(const cfg_type_t *type, + void (*f)(void *closure, const char *text, int textlen), + void *closure) +{ + cfg_printer_t pctx; + pctx.f = f; + pctx.closure = closure; + pctx.indent = 0; + print_grammar(&pctx, type); +} |