namedconf.c

bind 9.3结合mysql数据库

/*
 * 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 =
	CFG_ADDR_V4OK | CFG_ADDR_V6OK | CFG_ADDR_WILDOK;
static cfg_type_t cfg_type_controls_sockaddr = {
	"controls_sockaddr", cfg_parse_sockaddr, cfg_print_sockaddr,
	cfg_doc_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 or 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(cfg_parse_obj(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(cfg_parse_special(pctx, '}'));
	}
 cleanup:
	return (result);
}
static cfg_type_t cfg_type_server_key_kludge = {
	"server_key", parse_server_key_kludge, NULL, cfg_doc_terminal,
	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, CFG_LEXOPT_QSTRING));
	if (pctx->token.type == isc_tokentype_string ||
	    pctx->token.type == isc_tokentype_qstring) {
		CHECK(cfg_parse_obj(pctx, &cfg_type_astring, ret));
	} else {
		CHECK(cfg_parse_obj(pctx, &cfg_type_void, ret));
	}
 cleanup:
	return (result);
}

static cfg_type_t cfg_type_optional_facility = {
	"optional_facility", parse_optional_facility, NULL, cfg_doc_terminal,
	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, doc_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(TOKEN_STRING(pctx), "debug") == 0) {
		CHECK(cfg_gettoken(pctx, 0)); /* read "debug" */
		CHECK(cfg_peektoken(pctx, ISC_LEXOPT_NUMBER));
		if (pctx->token.type == isc_tokentype_number) {
			CHECK(cfg_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(cfg_create_obj(pctx, &cfg_type_uint32, ret));
			(*ret)->value.uint32 = 1;
		}
		(*ret)->type = &cfg_type_debuglevel; /* XXX kludge */
	} else {
		CHECK(cfg_parse_obj(pctx, &cfg_type_loglevel, ret));
	}
 cleanup:
	return (result);
}

static cfg_type_t cfg_type_logseverity = {
	"log_severity", parse_logseverity, NULL, cfg_doc_terminal,
	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, cfg_print_ustring, cfg_doc_terminal,
	&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(cfg_create_tuple(pctx, type, &obj));	

	/* Parse the mandatory "file" field */
	CHECK(cfg_parse_obj(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(TOKEN_STRING(pctx),
				       "versions") == 0 &&
			    obj->value.tuple[1] == NULL) {
				CHECK(cfg_parse_obj(pctx, fields[1].type,
					    &obj->value.tuple[1]));
			} else if (strcasecmp(TOKEN_STRING(pctx),
					      "size") == 0 &&
				   obj->value.tuple[2] == NULL) {
				CHECK(cfg_parse_obj(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(cfg_parse_void(pctx, NULL, &obj->value.tuple[1]));
	if (obj->value.tuple[2] == NULL)
		CHECK(cfg_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) {
	cfg_print_obj(pctx, obj->value.tuple[0]); /* file */
	if (obj->value.tuple[1]->type->print != cfg_print_void) {
		cfg_print_chars(pctx, " versions ", 10);
		cfg_print_obj(pctx, obj->value.tuple[1]);
	}
	if (obj->value.tuple[2]->type->print != cfg_print_void) {
		cfg_print_chars(pctx, " size ", 6);
		cfg_print_obj(pctx, obj->value.tuple[2]);
	}
}

static cfg_type_t cfg_type_logfile = {
	"log_file", parse_logfile, print_logfile, cfg_doc_terminal,
	&cfg_rep_tuple, logfile_fields
};

/* An IPv4/IPv6 address with optional port, "*" accepted as wildcard. */
static unsigned int sockaddr4wild_flags = CFG_ADDR_WILDOK | CFG_ADDR_V4OK;
static cfg_type_t cfg_type_sockaddr4wild = {
	"sockaddr4wild", cfg_parse_sockaddr, cfg_print_sockaddr,
	cfg_doc_sockaddr, &cfg_rep_sockaddr, &sockaddr4wild_flags
};

static unsigned int sockaddr6wild_flags = CFG_ADDR_WILDOK | CFG_ADDR_V6OK;
static cfg_type_t cfg_type_sockaddr6wild = {
	"v6addrportwild", cfg_parse_sockaddr, cfg_print_sockaddr,
	cfg_doc_sockaddr, &cfg_rep_sockaddr, &sockaddr6wild_flags
};

/*
 * 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", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple, &cfg_rep_tuple,
	lwres_view_fields
};

static cfg_type_t cfg_type_lwres_searchlist = {
	"lwres_searchlist", cfg_parse_bracketed_list, cfg_print_bracketed_list, cfg_doc_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", cfg_parse_map, cfg_print_map, cfg_doc_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", cfg_parse_map, cfg_print_map, cfg_doc_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", cfg_parse_named_map, cfg_print_map, cfg_doc_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", cfg_parse_mapbody, cfg_print_mapbody, cfg_doc_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", cfg_parse_mapbody, cfg_print_mapbody, cfg_doc_mapbody,
	&cfg_rep_map, rndckey_clausesets
};

static cfg_tuplefielddef_t nameport_fields[] = {
	{ "name", &cfg_type_astring, 0 },
	{ "port", &cfg_type_optional_port, 0 },
	{ NULL, NULL, 0 }
};
static cfg_type_t cfg_type_nameport = {
	"nameport", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple,
	&cfg_rep_tuple, nameport_fields
};

static void
doc_sockaddrnameport(cfg_printer_t *pctx, const cfg_type_t *type) {
	UNUSED(type);
	cfg_print_chars(pctx, "( ", 2);
	cfg_print_cstr(pctx, "<quoted_string>");
	cfg_print_chars(pctx, " ", 1);
	cfg_print_cstr(pctx, "[port <integer>]");
	cfg_print_chars(pctx, " | ", 3);
	cfg_print_cstr(pctx, "<ipv4_address>");
	cfg_print_chars(pctx, " ", 1);
	cfg_print_cstr(pctx, "[port <integer>]");
	cfg_print_chars(pctx, " | ", 3);
	cfg_print_cstr(pctx, "<ipv6_address>");
	cfg_print_chars(pctx, " ", 1);
	cfg_print_cstr(pctx, "[port <integer>]");
	cfg_print_chars(pctx, " )", 2);
}

static isc_result_t
parse_sockaddrnameport(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_peektoken(pctx, CFG_LEXOPT_QSTRING));
	if (pctx->token.type == isc_tokentype_string ||
	    pctx->token.type == isc_tokentype_qstring) {
		if (cfg_lookingat_netaddr(pctx, CFG_ADDR_V4OK | CFG_ADDR_V6OK))
			CHECK(cfg_parse_sockaddr(pctx, &cfg_type_sockaddr, ret));
		else {
			const cfg_tuplefielddef_t *fields =
						   cfg_type_nameport.of;	
			CHECK(cfg_create_tuple(pctx, &cfg_type_nameport,
					       &obj));	
			CHECK(cfg_parse_obj(pctx, fields[0].type,
					    &obj->value.tuple[0]));
			CHECK(cfg_parse_obj(pctx, fields[1].type,
					    &obj->value.tuple[1]));
			*ret = obj;
			obj = NULL;
		}
	} else {
		cfg_parser_error(pctx, CFG_LOG_NEAR,
			     "expected IP address or hostname");
		return (ISC_R_UNEXPECTEDTOKEN);
	}
 cleanup:
	CLEANUP_OBJ(obj);	
	return (result);
}

static cfg_type_t cfg_type_sockaddrnameport = {
	"sockaddrnameport_element", parse_sockaddrnameport, NULL,
	 doc_sockaddrnameport, NULL, NULL
};

static cfg_type_t cfg_type_bracketed_sockaddrnameportlist = {
	"bracketed_sockaddrnameportlist", cfg_parse_bracketed_list,
	cfg_print_bracketed_list, cfg_doc_bracketed_list,
	&cfg_rep_list, &cfg_type_sockaddrnameport
};

/*
 * A list of socket addresses or name with an optional default port,
 * as used in the dual-stack-servers option.  E.g.,
 * "port 1234 { dual-stack-servers.net; 10.0.0.1; 1::2 port 69; }"
 */
static cfg_tuplefielddef_t nameportiplist_fields[] = {
	{ "port", &cfg_type_optional_port, 0 },
	{ "addresses", &cfg_type_bracketed_sockaddrnameportlist, 0 },
	{ NULL, NULL, 0 }
};

static cfg_type_t cfg_type_nameportiplist = {
	"nameportiplist", cfg_parse_tuple, cfg_print_tuple, cfg_doc_tuple,
	&cfg_rep_tuple, nameportiplist_fields
};

/*
 * masters element.
 */

static void
doc_masterselement(cfg_printer_t *pctx, const cfg_type_t *type) {
	UNUSED(type);
	cfg_print_chars(pctx, "( ", 2);
	cfg_print_cstr(pctx, "<masters>");
	cfg_print_chars(pctx, " | ", 3);
	cfg_print_cstr(pctx, "<ipv4_address>");
	cfg_print_chars(pctx, " ", 1);
	cfg_print_cstr(pctx, "[port <integer>]");
	cfg_print_chars(pctx, " | ", 3);
	cfg_print_cstr(pctx, "<ipv6_address>");
	cfg_print_chars(pctx, " ", 1);
	cfg_print_cstr(pctx, "[port <integer>]");
	cfg_print_chars(pctx, " )", 2);
}

static isc_result_t
parse_masterselement(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_peektoken(pctx, CFG_LEXOPT_QSTRING));
	if (pctx->token.type == isc_tokentype_string ||
	    pctx->token.type == isc_tokentype_qstring) {
		if (cfg_lookingat_netaddr(pctx, CFG_ADDR_V4OK | CFG_ADDR_V6OK))
			CHECK(cfg_parse_sockaddr(pctx, &cfg_type_sockaddr, ret));
		else
			CHECK(cfg_parse_astring(pctx, &cfg_type_astring, ret));
	} else {
		cfg_parser_error(pctx, CFG_LOG_NEAR,
			     "expected IP address or masters name");
		return (ISC_R_UNEXPECTEDTOKEN);
	}
 cleanup:
	CLEANUP_OBJ(obj);	
	return (result);
}

static cfg_type_t cfg_type_masterselement = {
	"masters_element", parse_masterselement, NULL,
	 doc_masterselement, NULL, NULL
};