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1 /*
2  * (C) Masami Komiya <mkomiya@sonare.it> 2005
3  *  Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #ifndef __DNS_H__
9 #define __DNS_H__
10
11 #define DNS_SERVICE_PORT 53
12 #define DNS_TIMEOUT      10000UL
13
14 /* http://en.wikipedia.org/wiki/List_of_DNS_record_types */
15 enum dns_query_type {
16         DNS_A_RECORD = 0x01,
17         DNS_CNAME_RECORD = 0x05,
18         DNS_MX_RECORD = 0x0f,
19 };
20
21 /*
22  * DNS network packet
23  */
24 struct header {
25         uint16_t        tid;            /* Transaction ID */
26         uint16_t        flags;          /* Flags */
27         uint16_t        nqueries;       /* Questions */
28         uint16_t        nanswers;       /* Answers */
29         uint16_t        nauth;          /* Authority PRs */
30         uint16_t        nother;         /* Other PRs */
31         unsigned char   data[1];        /* Data, variable length */
32 };
33
34 extern void DnsStart(void);             /* Begin DNS */
35
36 #endif