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-rw-r--r--src/libdnssec/shared/dname.h57
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diff --git a/src/libdnssec/shared/dname.h b/src/libdnssec/shared/dname.h
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+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/*!
+ * Maximal length of domain name including labels and length bytes.
+ * \see RFC 1035
+ */
+#define DNAME_MAX_LENGTH 255
+
+/*!
+ * Maximal length of the domain name label, excluding the label size.
+ * \see RFC 1035
+ */
+#define DNAME_MAX_LABEL_LENGTH 63
+
+/*!
+ * Get length of a domain name in wire format.
+ */
+size_t dname_length(const uint8_t *dname);
+
+/*!
+ * Copy domain name in wire format.
+ */
+uint8_t *dname_copy(const uint8_t *dname);
+
+/*!
+ * Normalize domain name in wire format.
+ *
+ * Currently converts all letters to lowercase.
+ */
+void dname_normalize(uint8_t *dname);
+
+/*!
+ * Check if two dnames are equal.
+ *
+ * Case insensitive.
+ */
+bool dname_equal(const uint8_t *one, const uint8_t *two);