1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * (C) Masami Komiya <mkomiya@sonare.it> 2005 3*4882a593Smuzhiyun * Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __DNS_H__ 9*4882a593Smuzhiyun #define __DNS_H__ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #define DNS_SERVICE_PORT 53 12*4882a593Smuzhiyun #define DNS_TIMEOUT 10000UL 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun /* http://en.wikipedia.org/wiki/List_of_DNS_record_types */ 15*4882a593Smuzhiyun enum dns_query_type { 16*4882a593Smuzhiyun DNS_A_RECORD = 0x01, 17*4882a593Smuzhiyun DNS_CNAME_RECORD = 0x05, 18*4882a593Smuzhiyun DNS_MX_RECORD = 0x0f, 19*4882a593Smuzhiyun }; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* 22*4882a593Smuzhiyun * DNS network packet 23*4882a593Smuzhiyun */ 24*4882a593Smuzhiyun struct header { 25*4882a593Smuzhiyun uint16_t tid; /* Transaction ID */ 26*4882a593Smuzhiyun uint16_t flags; /* Flags */ 27*4882a593Smuzhiyun uint16_t nqueries; /* Questions */ 28*4882a593Smuzhiyun uint16_t nanswers; /* Answers */ 29*4882a593Smuzhiyun uint16_t nauth; /* Authority PRs */ 30*4882a593Smuzhiyun uint16_t nother; /* Other PRs */ 31*4882a593Smuzhiyun unsigned char data[1]; /* Data, variable length */ 32*4882a593Smuzhiyun } __attribute__((packed)); 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun void dns_start(void); /* Begin DNS */ 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #endif 37