/* * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 2000-2003 Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $Id: parser.c,v 1.70.2.24 2004/03/28 23:09:55 marka Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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 " */ #define LOG_BEFORE 0x00000002 /* Say "before " */ #define LOG_NOPREP 0x00000004 /* Say just "" */ #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isc_symtab */ /* Clause may occur multiple times (e.g., "zone") */ #define CFG_CLAUSEFLAG_MULTI 0x00000001 /* Clause is obsolete */ #define CFG_CLAUSEFLAG_OBSOLETE 0x00000002 /* Clause is not implemented, and may never be */ #define CFG_CLAUSEFLAG_NOTIMP 0x00000004 /* Clause is not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 ". */ 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", "delegation-only", 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 }, #ifdef ISC_RFC2535 { "trusted-keys", &cfg_type_trustedkeys, CFG_CLAUSEFLAG_MULTI }, #else { "trusted-keys", &cfg_type_trustedkeys, CFG_CLAUSEFLAG_MULTI|CFG_CLAUSEFLAG_OBSOLETE }, #endif { 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 } }; static cfg_type_t cfg_type_namelist = { "namelist", parse_bracketed_list, print_bracketed_list, &cfg_rep_list, &cfg_type_qstring }; static keyword_type_t exclude_kw = { "exclude", &cfg_type_namelist }; static cfg_type_t cfg_type_optional_exclude = { "optional_exclude", parse_optional_keyvalue, print_keyvalue, &cfg_rep_list, &exclude_kw }; /* * 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 }, { "root-delegation-only", &cfg_type_optional_exclude, 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 }, { "delegation-only", &cfg_type_boolean, 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: if (obj != NULL) isc_mem_put(pctx->mctx, obj, sizeof(*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)); if (pctx->token.type != isc_tokentype_string) { result = ISC_R_UNEXPECTEDTOKEN; goto cleanup; } 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) { isc_mem_put(pctx->mctx, obj, sizeof(*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; cfg_listelt_t *elt = NULL; CHECK(create_list(pctx, listtype, &listobj)); for (;;) { 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); elt = NULL; } *ret = listobj; return (ISC_R_SUCCESS); cleanup: if (elt != NULL) free_list_elt(pctx, elt); 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)); 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) <= 15U) { 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 >= 65536U) { 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 ? "" : 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: if (obj != NULL) isc_mem_put(pctx->mctx, obj, sizeof(*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); } else if (type->parse == parse_addressed_map) { print_grammar(pctx, &cfg_type_netaddr); 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, ""); n++; } if (*flagp & V6OK) { if (n != 0) print(pctx, " | ", 3); print_cstr(pctx, ""); n++; } if (*flagp & WILDOK) { if (n != 0) print(pctx, " | ", 3); print(pctx, "*", 1); n++; } print(pctx, " ) ", 3); if (*flagp & WILDOK) { print_cstr(pctx, "[ port ( | * ) ]"); } else { print_cstr(pctx, "[ port ]"); } } 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); }