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