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/*-

 * Copyright (c) 1980, 1983, 1988, 1993

 *      The Regents of the University of California.  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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.

 *

 * -

 * Portions Copyright (c) 1993 by Digital Equipment Corporation.

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies, and that

 * the name of Digital Equipment Corporation not be used in advertising or

 * publicity pertaining to distribution of the document or software without

 * specific, written prior permission.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL

 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT

 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL

 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR

 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS

 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 * -

 * --Copyright--

 */

/*

 *      @(#)netdb.h     8.1 (Berkeley) 6/2/93

 *      From: Id: netdb.h,v 8.9 1996/11/19 08:39:29 vixie Exp $

 * $FreeBSD: src/include/netdb.h,v 1.23 2002/03/23 17:24:53 imp Exp $

 */

#ifndef _NETDB_H_

#define _NETDB_H_

#include <sys/cdefs.h>

#include <sys/types.h>

#include <machine/ansi.h>

#include <stdio.h>

#ifndef __socklen_t_defined

typedef unsigned int socklen_t;

#define __socklen_t_defined 1

#endif

#ifdef  _BSD_SOCKLEN_T_

typedef _BSD_SOCKLEN_T_ socklen_t;

#undef  _BSD_SOCKLEN_T_

#endif

#ifndef _PATH_HEQUIV

# define        _PATH_HEQUIV    "/etc/hosts.equiv"

#endif

#define _PATH_HOSTS     "/etc/hosts"

#define _PATH_NETWORKS  "/etc/networks"

#define _PATH_PROTOCOLS "/etc/protocols"

#define _PATH_SERVICES  "/etc/services"

#define _PATH_NSSWITCH_CONF  "/etc/nsswitch.conf"

extern int *__h_errno_location(void);

#define h_errno (*(__h_errno_location()))

#define MAXALIASES      35

  /* For now, only support one return address. */

#define MAXADDRS         2

/*

 * Structures returned by network data base library.  All addresses are

 * supplied in host order, and returned in network order (suitable for

 * use in system calls).

 */

struct hostent {

  char  *h_name;        /* official name of host */

  char  **h_aliases;    /* alias list */

  int   h_addrtype;     /* host address type */

  int   h_length;       /* length of address */

  char  **h_addr_list;  /* list of addresses from name server */

  char *h_addr;         /* address, for backward compatibility */

  /* private data, for re-entrancy */

  char *__host_addrs[MAXADDRS];

  char *__host_aliases[MAXALIASES];

  unsigned int __host_addr[4];

};

/*

 * Assumption here is that a network number

 * fits in an unsigned long -- probably a poor one.

 */

struct netent {

        char            *n_name;        /* official name of net */

        char            **n_aliases;    /* alias list */

        int             n_addrtype;     /* net address type */

        unsigned long   n_net;          /* network # */

};

struct servent {

        char    *s_name;        /* official service name */

        char    **s_aliases;    /* alias list */

        int     s_port;         /* port # */

        char    *s_proto;       /* protocol to use */

};

struct protoent {

        char    *p_name;        /* official protocol name */

        char    **p_aliases;    /* alias list */

        int     p_proto;        /* protocol # */

};

struct addrinfo {

        int     ai_flags;       /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */

        int     ai_family;      /* PF_xxx */

        int     ai_socktype;    /* SOCK_xxx */

        int     ai_protocol;    /* 0 or IPPROTO_xxx for IPv4 and IPv6 */

        size_t  ai_addrlen;     /* length of ai_addr */

        char    *ai_canonname;  /* canonical name for hostname */

        struct  sockaddr *ai_addr;      /* binary address */

        struct  addrinfo *ai_next;      /* next structure in linked list */

};

/*

 * Error return codes from gethostbyname() and gethostbyaddr()

 * (left in extern int h_errno).

 */

#define NETDB_INTERNAL  -1      /* see errno */

#define NETDB_SUCCESS   0        /* no problem */

#define HOST_NOT_FOUND  1 /* Authoritative Answer Host not found */

#define TRY_AGAIN       2 /* Non-Authoritative Host not found, or SERVERFAIL */

#define NO_RECOVERY     3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */

#define NO_DATA         4 /* Valid name, no data record of requested type */

#define NO_ADDRESS      NO_DATA         /* no address, look for MX record */

/*

 * Error return codes from getaddrinfo()

 */

/* Error values for `getaddrinfo' function.  */

# define EAI_BADFLAGS     -1    /* Invalid value for `ai_flags' field.  */

# define EAI_NONAME       -2    /* NAME or SERVICE is unknown.  */

# define EAI_AGAIN        -3    /* Temporary failure in name resolution.  */

# define EAI_FAIL         -4    /* Non-recoverable failure in name res.  */

# define EAI_NODATA       -5    /* No address associated with NAME.  */

# define EAI_FAMILY       -6    /* `ai_family' not supported.  */

# define EAI_SOCKTYPE     -7    /* `ai_socktype' not supported.  */

# define EAI_SERVICE      -8    /* SERVICE not supported for `ai_socktype'.  */

# define EAI_ADDRFAMILY   -9    /* Address family for NAME not supported.  */

# define EAI_MEMORY       -10   /* Memory allocation failure.  */

# define EAI_SYSTEM       -11   /* System error returned in `errno'.  */

# define EAI_OVERFLOW     -12   /* Argument buffer overflow.  */

# ifdef __USE_GNU

#  define EAI_INPROGRESS  -100  /* Processing request in progress.  */

#  define EAI_CANCELED    -101  /* Request canceled.  */

#  define EAI_NOTCANCELED -102  /* Request not canceled.  */

#  define EAI_ALLDONE     -103  /* All requests done.  */

#  define EAI_INTR        -104  /* Interrupted by a signal.  */

#  define EAI_IDN_ENCODE  -105  /* IDN encoding failed.  */

# endif

/*

 * Flag values for getaddrinfo()

 */

#define AI_PASSIVE      0x00000001 /* get address to use bind() */

#define AI_CANONNAME    0x00000002 /* fill ai_canonname */

#define AI_NUMERICHOST  0x00000004 /* prevent name resolution */

#define AI_NUMERICSERV  0x00000008 /* don't use name resolution. */

/* valid flags for addrinfo */

#define AI_MASK \

    (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_ADDRCONFIG)

#define AI_ALL          0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */

#define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */

#define AI_ADDRCONFIG   0x00000400 /* only if any address is assigned */

#define AI_V4MAPPED     0x00000800 /* accept IPv4-mapped IPv6 address */

/* special recommended flags for getipnodebyname */

#define AI_DEFAULT      (AI_V4MAPPED_CFG | AI_ADDRCONFIG)

/*

 * Constants for getnameinfo()

 */

#define NI_MAXHOST      1025

#define NI_MAXSERV      32

/*

 * Flag values for getnameinfo()

 */

#define NI_NOFQDN       0x00000001

#define NI_NUMERICHOST  0x00000002

#define NI_NAMEREQD     0x00000004

#define NI_NUMERICSERV  0x00000008

#define NI_DGRAM        0x00000010

#define NI_WITHSCOPEID  0x00000020

/*

 * Scope delimit character

 */

#define SCOPE_DELIMITER '%'

__BEGIN_DECLS

void            endhostent(void);

void            endhostent_r(FILE **, int *);

void            endnetent(void);

void            endnetgrent(void);

void            endprotoent(void);

void            endservent(void);

void            freehostent(struct hostent *);

struct hostent  *gethostbyaddr(const void *, socklen_t, int);

struct hostent  *gethostbyname(const char *);

struct hostent  *gethostbyname2(const char *, int);

struct hostent  *gethostent(void);

int             gethostent_r(struct hostent *, char *, int, int *, FILE **);

struct hostent  *getipnodebyaddr(const void *, size_t, int, int *);

struct hostent  *getipnodebyname(const char *, int, int, int *);

struct netent   *getnetbyaddr(uint32_t, int);

struct netent   *getnetbyname(const char *);

struct netent   *getnetent(void);

int             getnetgrent(char **, char **, char **);

struct protoent *getprotobyname(const char *);

struct protoent *getprotobynumber(int);

struct protoent *getprotoent(void);

struct servent  *getservbyname(const char *, const char *);

struct servent  *getservbyport(int, const char *);

struct servent  *getservent(void);

void            herror(const char *);

__const char    *hstrerror(int);

int             innetgr(const char *, const char *, const char *, const char *);

void            sethostent(int);

void            sethostent_r(int, FILE **, int *);

/* void         sethostfile(const char *); */

void            setnetent(int);

void            setprotoent(int);

int             getaddrinfo(const char *, const char *,

                            const struct addrinfo *, struct addrinfo **);

int             getnameinfo(const struct sockaddr *, socklen_t, char *,

                            socklen_t, char *, socklen_t, unsigned int);

void            freeaddrinfo(struct addrinfo *);

char            *gai_strerror(int);

int             setnetgrent(const char *);

void            setservent(int);

/*

 * PRIVATE functions specific to the FreeBSD implementation

 */

/* DO NOT USE THESE, THEY ARE SUBJECT TO CHANGE AND ARE NOT PORTABLE!!! */

void    _sethosthtent(int);

void    _sethosthtent_r(int, FILE **, int *);

void    _endhosthtent(void);

void    _endhosthtent_r(FILE **, int *);

void    _sethostdnsent(int);

void    _endhostdnsent(void);

void    _setnethtent(int);

void    _endnethtent(void);

void    _setnetdnsent(int);

void    _endnetdnsent(void);

struct hostent * _gethostbynisname(const char *, int);

struct hostent * _gethostbynisaddr(const char *, int, int);

void _map_v4v6_address(const char *, char *);

void _map_v4v6_hostent(struct hostent *, char **, int *);

__END_DECLS

#endif /* !_NETDB_H_ */