| Robin Getz | 82f0d23 | 2009-07-20 14:53:54 -0400 | [diff] [blame] | 1 | /* |
| 2 | * (C) Masami Komiya <mkomiya@sonare.it> 2005 |
| 3 | * Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
| 7 | * published by the Free Software Foundation; either version 2, or (at |
| 8 | * your option) any later version. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __DNS_H__ |
| 12 | #define __DNS_H__ |
| 13 | |
| 14 | #define DNS_SERVICE_PORT 53 |
| 15 | #define DNS_TIMEOUT 10000UL |
| 16 | |
| 17 | /* http://en.wikipedia.org/wiki/List_of_DNS_record_types */ |
| 18 | enum dns_query_type { |
| 19 | DNS_A_RECORD = 0x01, |
| 20 | DNS_CNAME_RECORD = 0x05, |
| 21 | DNS_MX_RECORD = 0x0f, |
| 22 | }; |
| 23 | |
| 24 | /* |
| 25 | * DNS network packet |
| 26 | */ |
| 27 | struct header { |
| 28 | uint16_t tid; /* Transaction ID */ |
| 29 | uint16_t flags; /* Flags */ |
| 30 | uint16_t nqueries; /* Questions */ |
| 31 | uint16_t nanswers; /* Answers */ |
| 32 | uint16_t nauth; /* Authority PRs */ |
| 33 | uint16_t nother; /* Other PRs */ |
| 34 | unsigned char data[1]; /* Data, variable length */ |
| 35 | }; |
| 36 | |
| 37 | extern void DnsStart(void); /* Begin DNS */ |
| 38 | |
| 39 | #endif |