ze-dns.h

Go to the documentation of this file.

/*
 * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
 *  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

/*
 * Copyright (c) 1995, 1996, 1997, 1998, 1999 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: sm_resolve.h,v 8.8 2001/09/01 00:06:02 gshapiro Exp $ */

#ifndef __ZE_ROKEN_RESOLVE_H

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

#define NETINET6    1

# ifndef T_TXT
#  define T_TXT           16
# endif            /* ! T_TXT */
# ifndef T_AFSDB
#  define T_AFSDB   18
# endif            /* ! T_AFSDB */
# ifndef T_SRV
#  define T_SRV           33
# endif            /* ! T_SRV */
# ifndef T_NAPTR
#  define T_NAPTR   35
# endif            /* ! T_NAPTR */

typedef struct
{
  char               *dns_q_domain;
  unsigned int        dns_q_type;
  unsigned int        dns_q_class;
} DNS_QUERY_T;

typedef struct
{
  unsigned int        mx_r_preference;
  char                mx_r_domain[1];
} MX_RECORD_T;

typedef struct
{
  unsigned int        srv_r_priority;
  unsigned int        srv_r_weight;
  unsigned int        srv_r_port;
  char                srv_r_target[1];
} SRV_RECORDT_T;


typedef struct resource_record RR_RECORD_T;

struct resource_record
{
  char               *rr_domain;
  unsigned int        rr_type;
  unsigned int        rr_class;
  unsigned int        rr_ttl;
  unsigned int        rr_size;
  union
  {
    void               *rr_data;
    MX_RECORD_T        *rr_mx;
    MX_RECORD_T        *rr_afsdb; /* mx and afsdb are identical */
    SRV_RECORDT_T      *rr_srv;
    struct in_addr     *rr_a;
#  if NETINET6
    struct in6_addr    *rr_aaaa;
#  endif                        /* NETINET6 */
    char               *rr_txt;
  } rr_u;
  RR_RECORD_T        *rr_next;
};

#  if !defined(T_A) && !defined(T_AAAA)
/* XXX if <arpa/nameser.h> isn't included */
typedef int         HEADER;     /* will never be used */
#  endif           /* !defined(T_A) && !defined(T_AAAA)  */

typedef struct
{
  uint32_t            dns_signature;
  HEADER              dns_r_h;
  DNS_QUERY_T         dns_r_q;
  RR_RECORD_T        *dns_r_head;
  int                 dns_error;
} DNS_REPLY_T;


void                dns_free_data(DNS_REPLY_T *);
int                 dns_string_to_type(const char *);

const char         *dns_type_to_string(int);

int                 dns_lookup(const char *domain,
                               const char *type_name,
                               time_t retrans, int retry, DNS_REPLY_T *);

#define             DNS_NO_ERR          0
#define             DNS_ERR_TMPFAIL    -1
#define             DNS_ERR_NOTFOUND   -2
#define             DNS_ERR_SRV        -3
#define             DNS_LOC_ERR        -4

extern bool         dns_lock;

# define __ZE_ROKEN_RESOLVE_H
#endif             /* __ZE_ROKEN_RESOLVE_H */