91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
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/*
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* $Id$
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*
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Copyright (c) 2015-2016 Chung, Hyung-Hwan. 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 "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAfRRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MIO_DNS_H_
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#define _MIO_DNS_H_
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#include <mio.h>
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#define MIO_DNS_PORT (53)
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enum mio_dns_opcode_t
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{
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MIO_DNS_OPCODE_QUERY = 0, /* standard query */
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MIO_DNS_OPCODE_IQUERY = 1, /* inverse query */
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MIO_DNS_OPCODE_STATUS = 2, /* status request */
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/* 3 unassigned */
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MIO_DNS_OPCODE_NOTIFY = 4,
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MIO_DNS_OPCODE_UPDATE = 5
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};
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typedef enum mio_dns_opcode_t mio_dns_opcode_t;
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enum mio_dns_rcode_t
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{
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MIO_DNS_RCODE_NOERROR = 0,
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MIO_DNS_RCODE_FORMERR = 1, /* format error */
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MIO_DNS_RCODE_SERVFAIL = 2, /* server failure */
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MIO_DNS_RCODE_NXDOMAIN = 3, /* non-existent domain */
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MIO_DNS_RCODE_NOTIMPL = 4, /* not implemented */
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MIO_DNS_RCODE_REFUSED = 5, /* query refused */
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MIO_DNS_RCODE_YXDOMAIN = 6, /* name exists when it should not */
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MIO_DNS_RCODE_YXRRSET = 7, /* RR set exists when it should not */
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MIO_DNS_RCODE_NXRRSET = 8, /* RR set exists when it should not */
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MIO_DNS_RCODE_NOTAUTH = 9, /* not authorized or server not authoritative for zone*/
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MIO_DNS_RCODE_NOTZONE = 10, /* name not contained in zone */
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MIO_DNS_RCODE_BADVERS = 16,
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MIO_DNS_RCODE_BADSIG = 17,
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MIO_DNS_RCODE_BADTIME = 18,
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MIO_DNS_RCODE_BADMODE = 19,
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MIO_DNS_RCODE_BADNAME = 20,
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MIO_DNS_RCODE_BADALG = 21,
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MIO_DNS_RCODE_BADTRUNC = 22,
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MIO_DNS_RCODE_BADCOOKIE = 23
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};
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typedef enum mio_dns_rcode_t mio_dns_rcode_t;
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struct mio_dns_msg_t
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{
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mio_uint16_t id;
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mio_uint16_t qr: 1; /* query(0), answer(1) */
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mio_uint16_t opcode: 4; /* operation type */
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mio_uint16_t aa: 1; /* authoritative answer */
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mio_uint16_t tc: 1; /* truncated. response too large for UDP */
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mio_uint16_t rd: 1; /* recursion desired */
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mio_uint16_t ra: 1; /* recursion available */
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mio_uint16_t unused_1: 1;
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mio_uint16_t ad: 1; /* authentication data - dnssec */
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mio_uint16_t cd: 1; /* checking disabled - dnssec */
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mio_uint16_t rcode: 4;
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mio_uint16_t qdcount;
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mio_uint16_t ancount;
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mio_uint16_t nscount;
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mio_uint16_t arcount;
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};
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typedef struct mio_dns_msg_t mio-dns
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#endif
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