addrinfo.h

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/*
 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 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.
 */

/**
 * @file addrinfo.h
 *
 * Replacement getaddrinfo() for machines that don't have it.  The new
 * getaddrinfo()/getnameinfo() interface is implemented on top of the
 * traditional resolver calls.
 **/

#ifndef HAVE_GETADDRINFO

#ifndef EAI_ADDRFAMILY
/*
 * 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
#endif /* ndef EAI_ADDRFAMILY */

/*
 * 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)

#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

struct addrinfo {
        int     ai_flags;       /* AI_PASSIVE, AI_CANONNAME */
        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 */
};

extern void freehostent(struct hostent *);
extern char *gai_strerror(int);
#endif /* AI_PASSIVE */
#endif /* HAVE_GETADDRINFO */

#ifndef HAVE_SOCKADDR_STORAGE
struct sockaddr_storage {
        unsigned long   align;
        unsigned char   fill[128 - sizeof (unsigned long)];
};
#endif

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