1 /* 2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* $Id: resolve.h,v 1.8 1999/12/02 16:58:52 joda Exp $ */ 35 36 #ifndef __RESOLVE_H__ 37 #define __RESOLVE_H__ 38 39 /* We use these, but they are not always present in <arpa/nameser.h> */ 40 41 #ifndef T_TXT 42 #define T_TXT 16 43 #endif 44 #ifndef T_AFSDB 45 #define T_AFSDB 18 46 #endif 47 #ifndef T_SRV 48 #define T_SRV 33 49 #endif 50 #ifndef T_NAPTR 51 #define T_NAPTR 35 52 #endif 53 54 struct dns_query{ 55 char *domain; 56 unsigned type; 57 unsigned class; 58 }; 59 60 struct mx_record{ 61 unsigned preference; 62 char domain[1]; 63 }; 64 65 struct srv_record{ 66 unsigned priority; 67 unsigned weight; 68 unsigned port; 69 char target[1]; 70 }; 71 72 struct resource_record{ 73 char *domain; 74 unsigned type; 75 unsigned class; 76 unsigned ttl; 77 unsigned size; 78 union { 79 void *data; 80 struct mx_record *mx; 81 struct mx_record *afsdb; /* mx and afsdb are identical */ 82 struct srv_record *srv; 83 struct in_addr *a; 84 char *txt; 85 }u; 86 struct resource_record *next; 87 }; 88 89 #ifndef T_A /* XXX if <arpa/nameser.h> isn't included */ 90 typedef int HEADER; /* will never be used */ 91 #endif 92 93 struct dns_reply{ 94 HEADER h; 95 struct dns_query q; 96 struct resource_record *head; 97 }; 98 99 100 struct dns_reply* dns_lookup(const char *, const char *); 101 void dns_free_data(struct dns_reply *); 102 103 #endif /* __RESOLVE_H__ */ 104