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/* Copyright (c) 2016 Phoenix Systems
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.*/
#ifndef _ARPA_NAMESER_H
#define _ARPA_NAMESER_H
/* Define constants based on RFC 883, RFC 1034, RFC 1035 */
#define NS_PACKETSZ 512 /* Maximum packet size */
#define NS_MAXDNAME 1025 /* Maximum domain name */
#define NS_MAXCDNAME 255 /* Maximum compressed domain name */
#define NS_MAXLABEL 63 /* Maximum length of domain label */
#define NS_HFIXEDSZ 12 /* Bytes of fixed data in header */
#define NS_QFIXEDSZ 4 /* Bytes of fixed data in query */
#define NS_RRFIXEDSZ 10 /* Bytes of fixed data in r record */
#define NS_INT32SZ 4 /* Bytes of data in a u_int32_t */
#define NS_INT16SZ 2 /* Bytes of data in a u_int16_t */
#define NS_INT8SZ 1 /* Bytes of data in a u_int8_t */
#define NS_INADDRSZ 4 /* IPv4 T_A */
#define NS_IN6ADDRSZ 16 /* IPv6 T_AAAA */
#define NS_CMPRSFLGS 0xc0 /* Flag bits indicating name compression. */
#define NS_DEFAULTPORT 53 /* For both TCP and UDP. */
#endif
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