resolve.h

/*
 * Copyright (c) 1995 - 2006 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* $Id$ */

/* THIS IS NOT (yet) A PUBLIC INTERFACE */

#ifndef __RESOLVE_H__
#define __RESOLVE_H__

/* when would this *not* be defined? */
#include "config.h"

#include <arpa/nameser.h>
#ifdef HAVE_ARPA_NAMESER_COMPAT_H
#include <arpa/nameser_compat.h>
#endif

/* We use these, but they are not always present in <arpa/nameser.h> */

#ifndef T_TXT
#define T_TXT		16
#endif
#ifndef T_AFSDB
#define T_AFSDB		18
#endif
#ifndef T_SRV
#define T_SRV		 33
#endif

struct dns_query
{
  char *domain;
  unsigned type;
  unsigned class;
};

struct mx_record
{
  unsigned preference;
  char domain[1];
};

struct srv_record
{
  unsigned priority;
  unsigned weight;
  unsigned port;
  char target[1];
};

struct resource_record
{
  char *domain;
  unsigned type;
  unsigned class;
  unsigned ttl;
  unsigned size;
  union
  {
    void *data;
    struct mx_record *mx;
    struct mx_record *afsdb;	/* mx and afsdb are identical */
    struct srv_record *srv;
    struct in_addr *a;
    char *txt;
  }
  u;
  struct resource_record *next;
};

struct dns_reply
{
  HEADER h;
  struct dns_query q;
  struct resource_record *head;
};

#define dns_lookup	_nss_ldap_dns_lookup
#define dns_free_data	_nss_ldap_dns_free_data

struct dns_reply *dns_lookup (const char *, const char *);

void dns_free_data (struct dns_reply *r);

#endif /* __RESOLVE_H__ */