/*      $NetBSD: ntp_rfc2553.h,v 1.5 2020/05/25 20:47:20 christos Exp $ */

/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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 project 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 PROJECT 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 PROJECT 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.
*/

/*
* Copyright (c) 1982, 1986, 1990, 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.
*
*      @(#)in.h        8.3 (Berkeley) 1/3/94
*/

/*
* Compatability shims with the rfc2553 API to simplify ntp.
*/
#ifndef NTP_RFC2553_H
#define NTP_RFC2553_H

#include <netdb.h>
#include <isc/net.h>

#include "ntp_types.h"
#include "ntp_malloc.h"

struct addrinfo *copy_addrinfo_impl(const struct addrinfo *
#ifdef EREALLOC_CALLSITE        /* from ntp_malloc.h */
                                                          ,
                                   const char *, int
#endif
                                        );
struct addrinfo *copy_addrinfo_list_impl(const struct addrinfo *
#ifdef EREALLOC_CALLSITE        /* from ntp_malloc.h */
                                                               ,
                                        const char *, int
#endif
                                        );
#ifdef EREALLOC_CALLSITE
# define copy_addrinfo(l) \
        copy_addrinfo_impl((l), __FILE__, __LINE__)
# define copy_addrinfo_list(l) \
        copy_addrinfo_list_impl((l), __FILE__, __LINE__)
#else
# define copy_addrinfo(l)       copy_addrinfo_impl(l)
# define copy_addrinfo_list(l)  copy_addrinfo_list_impl(l)
#endif

/*
* If various macros are not defined we need to define them
*/

#ifndef AF_INET6
# define AF_INET6       AF_MAX
# define PF_INET6       AF_INET6
#endif

#if !defined(_SS_MAXSIZE) && !defined(_SS_ALIGNSIZE)

# define        _SS_MAXSIZE     128
# define        _SS_ALIGNSIZE   (sizeof(ntp_uint64_t))
# ifdef ISC_PLATFORM_HAVESALEN
#  define       _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(ntp_u_int8_t))
#  define       _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) - sizeof(ntp_u_int8_t) - \
                               _SS_PAD1SIZE - _SS_ALIGNSIZE)
# else
#  define       _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(short))
#  define       _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(short) - \
                               _SS_PAD1SIZE - _SS_ALIGNSIZE)
# endif /* ISC_PLATFORM_HAVESALEN */
#endif

#ifndef INET6_ADDRSTRLEN
# define        INET6_ADDRSTRLEN        46      /* max len of IPv6 addr in ascii */
#endif

/*
* If we don't have the sockaddr_storage structure
* we need to define it
*/

#ifndef HAVE_STRUCT_SOCKADDR_STORAGE
struct sockaddr_storage {
#ifdef ISC_PLATFORM_HAVESALEN
       ntp_u_int8_t    ss_len;         /* address length */
       ntp_u_int8_t    ss_family;      /* address family */
#else
       short           ss_family;      /* address family */
#endif
       char            __ss_pad1[_SS_PAD1SIZE];
       ntp_uint64_t    __ss_align;     /* force desired structure storage alignment */
       char            __ss_pad2[_SS_PAD2SIZE];
};
#endif

/*
* Finally if the platform doesn't support IPv6 we need some
* additional definitions
*/

/*
* Flag values for getaddrinfo()
*/
#ifndef AI_PASSIVE
#define AI_PASSIVE      0x00000001 /* get address to use bind() */
#define AI_CANONNAME    0x00000002 /* fill ai_canonname */
#define AI_NUMERICHOST  0x00000004 /* prevent name resolution */
/* valid flags for addrinfo */
#define AI_MASK \
   (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_ADDRCONFIG)

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

#ifndef AI_NUMERICHOST          /* such as AIX 4.3 */
# define Z_AI_NUMERICHOST       0
#else
# define Z_AI_NUMERICHOST       AI_NUMERICHOST
#endif

#ifndef AI_NUMERICSERV          /* not in RFC 2553 */
# define Z_AI_NUMERICSERV       0
#else
# define Z_AI_NUMERICSERV       AI_NUMERICSERV
#endif

#ifndef ISC_PLATFORM_HAVEIPV6

#ifdef SYS_WINNT
# define in6_addr in_addr6
#endif

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 getaddrinfo()
*/
#define EAI_ADDRFAMILY   1      /* address family for hostname not supported */
#define EAI_AGAIN        2      /* temporary failure in name resolution */
#define EAI_BADFLAGS     3      /* invalid value for ai_flags */
#define EAI_FAIL         4      /* non-recoverable failure in name resolution */
#define EAI_FAMILY       5      /* ai_family not supported */
#define EAI_MEMORY       6      /* memory allocation failure */
#define EAI_NODATA       7      /* no address associated with hostname */
#define EAI_NONAME       8      /* hostname nor servname provided, or not known */
#define EAI_SERVICE      9      /* servname not supported for ai_socktype */
#define EAI_SOCKTYPE    10      /* ai_socktype not supported */
#define EAI_SYSTEM      11      /* system error returned in errno */
#define EAI_BADHINTS    12
#define EAI_PROTOCOL    13
#define EAI_MAX         14


int     getaddrinfo (const char *, const char *,
                        const struct addrinfo *, struct addrinfo **);
int     getnameinfo (const struct sockaddr *, u_int, char *,
                        size_t, char *, size_t, int);
void    freeaddrinfo (struct addrinfo *);
char    *gai_strerror (int);

/*
* Constants for getnameinfo()
*/
#ifndef NI_MAXHOST
#define NI_MAXHOST      1025
#define NI_MAXSERV      32
#endif

/*
* Flag values for getnameinfo()
*/
#ifndef NI_NUMERICHOST
#define NI_NOFQDN       0x00000001
#define NI_NUMERICHOST  0x00000002
#define NI_NAMEREQD     0x00000004
#define NI_NUMERICSERV  0x00000008
#define NI_DGRAM        0x00000010
#define NI_WITHSCOPEID  0x00000020
#endif

#endif /* !ISC_PLATFORM_HAVEIPV6 */

/*
* Set up some macros to look for IPv6 and IPv6 multicast
*/

#if defined(ISC_PLATFORM_HAVEIPV6) && defined(WANT_IPV6)
# define INCLUDE_IPV6_SUPPORT
# if defined(IPV6_JOIN_GROUP) && defined(IPV6_LEAVE_GROUP)
#  define INCLUDE_IPV6_MULTICAST_SUPPORT
# endif /* IPV6 Multicast Support */
#endif  /* IPv6 Support */

#endif /* !NTP_RFC2553_H */

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