1 files changed, 91 insertions, 0 deletions
diff --git a/lib/dns/include/dns/rdataclass.h b/lib/dns/include/dns/rdataclass.h
new file mode 100644
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+++ b/lib/dns/include/dns/rdataclass.h
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+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#pragma once
+
+/*! \file dns/rdataclass.h */
+
+#include <isc/lang.h>
+
+#include <dns/types.h>
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+dns_rdataclass_fromtext(dns_rdataclass_t *classp, isc_textregion_t *source);
+/*%<
+ * Convert the text 'source' refers to into a DNS class.
+ *
+ * Requires:
+ *\li	'classp' is a valid pointer.
+ *
+ *\li	'source' is a valid text region.
+ *
+ * Returns:
+ *\li	#ISC_R_SUCCESS			on success
+ *\li	#DNS_R_UNKNOWN			class is unknown
+ */
+
+isc_result_t
+dns_rdataclass_totext(dns_rdataclass_t rdclass, isc_buffer_t *target);
+/*%<
+ * Put a textual representation of class 'rdclass' into 'target'.
+ *
+ * Requires:
+ *\li	'rdclass' is a valid class.
+ *
+ *\li	'target' is a valid text buffer.
+ *
+ * Ensures,
+ *	if the result is success:
+ *\li		The used space in 'target' is updated.
+ *
+ * Returns:
+ *\li	#ISC_R_SUCCESS			on success
+ *\li	#ISC_R_NOSPACE			target buffer is too small
+ */
+
+isc_result_t
+dns_rdataclass_tounknowntext(dns_rdataclass_t rdclass, isc_buffer_t *target);
+/*%<
+ * Put textual RFC3597 CLASSXXXX representation of class 'rdclass' into
+ * 'target'.
+ *
+ * Requires:
+ *\li	'rdclass' is a valid class.
+ *
+ *\li	'target' is a valid text buffer.
+ *
+ * Ensures,
+ *	if the result is success:
+ *\li		The used space in 'target' is updated.
+ *
+ * Returns:
+ *\li	#ISC_R_SUCCESS			on success
+ *\li	#ISC_R_NOSPACE			target buffer is too small
+ */
+
+void
+dns_rdataclass_format(dns_rdataclass_t rdclass, char *array, unsigned int size);
+/*%<
+ * Format a human-readable representation of the class 'rdclass'
+ * into the character array 'array', which is of size 'size'.
+ * The resulting string is guaranteed to be null-terminated.
+ */
+
+#define DNS_RDATACLASS_FORMATSIZE sizeof("CLASS65535")
+/*%<
+ * Minimum size of array to pass to dns_rdataclass_format().
+ */
+
+ISC_LANG_ENDDECLS