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addrinfo.h

/*
 * 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.
 */

/* $Id: addrinfo.h,v 1.1 2004/08/01 05:34:47 fyodor Exp $ */

#ifndef HAVE_ADDRINFO

/*
 * 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

/* internal error */
#define     NETDB_INTERNAL    -1    /* see errno */

/*
 * 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 */
/* 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)

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 freeaddrinfo (struct addrinfo *);
extern void freehostent (struct hostent *);
extern char *gai_strerror (int);
extern int getaddrinfo (const char *, const char *,
                      const struct addrinfo *, struct addrinfo **);
extern int getnameinfo (const struct sockaddr *, size_t, char *,
                      size_t, char *, size_t, int);
extern struct hostent *getipnodebyaddr (const void *, size_t, int, int *);
extern struct hostent *getipnodebyname (const char *, int, int, int *);
extern int inet_pton (int, const char *, void *);
extern const char *inet_ntop (int, const void *, char *, size_t);
#endif /* HAVE_ADDRINFO */

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

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

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