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20 lines
714 B
C
20 lines
714 B
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include "forward.h"
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/* Length of a single label, with all escaping removed, excluding any trailing dot or NUL byte */
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#define DNS_LABEL_MAX 63
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/* Worst case length of a single label, with all escaping applied and room for a trailing NUL byte. */
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#define DNS_LABEL_ESCAPED_MAX (DNS_LABEL_MAX*4+1)
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/* Maximum length of a full hostname, consisting of a series of unescaped labels, and no trailing dot or NUL byte */
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#define DNS_HOSTNAME_MAX 253
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/* Maximum length of a full hostname, on the wire, including the final NUL byte */
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#define DNS_WIRE_FORMAT_HOSTNAME_MAX 255
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/* Maximum number of labels per valid hostname */
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#define DNS_N_LABELS_MAX 127
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