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