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      1 /*
      2  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. Neither the name of the project nor the names of its contributors
     14  *    may be used to endorse or promote products derived from this software
     15  *    without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 /* $Id: addrinfo.h,v 1.4 2002/06/11 17:13:36 itojun Exp $ */
     31 
     32 #ifndef HAVE_ADDRINFO
     33 
     34 /*
     35  * Error return codes from getaddrinfo()
     36  */
     37 #define	EAI_ADDRFAMILY	 1	/* address family for hostname not supported */
     38 #define	EAI_AGAIN	 2	/* temporary failure in name resolution */
     39 #define	EAI_BADFLAGS	 3	/* invalid value for ai_flags */
     40 #define	EAI_FAIL	 4	/* non-recoverable failure in name resolution */
     41 #define	EAI_FAMILY	 5	/* ai_family not supported */
     42 #define	EAI_MEMORY	 6	/* memory allocation failure */
     43 #define	EAI_NODATA	 7	/* no address associated with hostname */
     44 #define	EAI_NONAME	 8	/* hostname nor servname provided, or not known */
     45 #define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
     46 #define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
     47 #define	EAI_SYSTEM	11	/* system error returned in errno */
     48 #define EAI_BADHINTS	12
     49 #define EAI_PROTOCOL	13
     50 #define EAI_MAX		14
     51 
     52 /* internal error */
     53 #define	NETDB_INTERNAL	-1	/* see errno */
     54 
     55 /*
     56  * Flag values for getaddrinfo()
     57  */
     58 #define	AI_PASSIVE	0x00000001 /* get address to use bind() */
     59 #define	AI_CANONNAME	0x00000002 /* fill ai_canonname */
     60 #define	AI_NUMERICHOST	0x00000004 /* prevent name resolution */
     61 /* valid flags for addrinfo */
     62 #define	AI_MASK		(AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
     63 
     64 #define	AI_ALL		0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
     65 #define	AI_V4MAPPED_CFG	0x00000200 /* accept IPv4-mapped if kernel supports */
     66 #define	AI_ADDRCONFIG	0x00000400 /* only if any address is assigned */
     67 #define	AI_V4MAPPED	0x00000800 /* accept IPv4-mapped IPv6 address */
     68 /* special recommended flags for getipnodebyname */
     69 #define	AI_DEFAULT	(AI_V4MAPPED_CFG | AI_ADDRCONFIG)
     70 
     71 struct addrinfo {
     72 	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME */
     73 	int	ai_family;	/* PF_xxx */
     74 	int	ai_socktype;	/* SOCK_xxx */
     75 	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
     76 	size_t	ai_addrlen;	/* length of ai_addr */
     77 	char	*ai_canonname;	/* canonical name for hostname */
     78 	struct sockaddr *ai_addr;	/* binary address */
     79 	struct addrinfo *ai_next;	/* next structure in linked list */
     80 };
     81 
     82 extern void freeaddrinfo (struct addrinfo *);
     83 extern void freehostent (struct hostent *);
     84 extern char *gai_strerror (int);
     85 extern int getaddrinfo (const char *, const char *,
     86 			    const struct addrinfo *, struct addrinfo **);
     87 extern int getnameinfo (const struct sockaddr *, size_t, char *,
     88 			    size_t, char *, size_t, int);
     89 extern struct hostent *getipnodebyaddr (const void *, size_t, int, int *);
     90 extern struct hostent *getipnodebyname (const char *, int, int, int *);
     91 extern int inet_pton (int, const char *, void *);
     92 extern const char *inet_ntop (int, const void *, char *, size_t);
     93 #endif /* HAVE_ADDRINFO */
     94 
     95 /*
     96  * Constants for getnameinfo()
     97  */
     98 #ifndef NI_MAXHOST
     99 #define	NI_MAXHOST	1025
    100 #endif
    101 #ifndef NI_MAXSERV
    102 #define	NI_MAXSERV	32
    103 #endif
    104 
    105 /*
    106  * Flag values for getnameinfo()
    107  */
    108 #ifndef NI_NOFQDN
    109 #define	NI_NOFQDN	0x00000001
    110 #endif
    111 #ifndef NI_NUMERICHOST
    112 #define	NI_NUMERICHOST	0x00000002
    113 #endif
    114 #ifndef NI_NAMEREQD
    115 #define	NI_NAMEREQD	0x00000004
    116 #endif
    117 #ifndef NI_NUMERICSERV
    118 #define	NI_NUMERICSERV	0x00000008
    119 #endif
    120 #ifndef NI_DGRAM
    121 #define	NI_DGRAM	0x00000010
    122 #endif
    123