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#ifndef HAVE_ADDRINFO
31
32/*
33 * Error return codes from getaddrinfo()
34 */
35#define	EAI_ADDRFAMILY	 1	/* address family for hostname not supported */
36#define	EAI_AGAIN	 2	/* temporary failure in name resolution */
37#define	EAI_BADFLAGS	 3	/* invalid value for ai_flags */
38#define	EAI_FAIL	 4	/* non-recoverable failure in name resolution */
39#define	EAI_FAMILY	 5	/* ai_family not supported */
40#define	EAI_MEMORY	 6	/* memory allocation failure */
41#define	EAI_NODATA	 7	/* no address associated with hostname */
42#define	EAI_NONAME	 8	/* hostname nor servname provided, or not known */
43#define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
44#define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
45#define	EAI_SYSTEM	11	/* system error returned in errno */
46#define EAI_BADHINTS	12
47#define EAI_PROTOCOL	13
48#define EAI_MAX		14
49
50/* internal error */
51#define	NETDB_INTERNAL	-1	/* see errno */
52
53/*
54 * Flag values for getaddrinfo()
55 */
56#define	AI_PASSIVE	0x00000001 /* get address to use bind() */
57#define	AI_CANONNAME	0x00000002 /* fill ai_canonname */
58#define	AI_NUMERICHOST	0x00000004 /* prevent name resolution */
59/* valid flags for addrinfo */
60#define	AI_MASK		(AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
61
62#define	AI_ALL		0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
63#define	AI_V4MAPPED_CFG	0x00000200 /* accept IPv4-mapped if kernel supports */
64#define	AI_ADDRCONFIG	0x00000400 /* only if any address is assigned */
65#define	AI_V4MAPPED	0x00000800 /* accept IPv4-mapped IPv6 address */
66/* special recommended flags for getipnodebyname */
67#define	AI_DEFAULT	(AI_V4MAPPED_CFG | AI_ADDRCONFIG)
68
69struct addrinfo {
70	int	ai_flags;	/* AI_PASSIVE, AI_CANONNAME */
71	int	ai_family;	/* PF_xxx */
72	int	ai_socktype;	/* SOCK_xxx */
73	int	ai_protocol;	/* 0 or IPPROTO_xxx for IPv4 and IPv6 */
74	size_t	ai_addrlen;	/* length of ai_addr */
75	char	*ai_canonname;	/* canonical name for hostname */
76	struct sockaddr *ai_addr;	/* binary address */
77	struct addrinfo *ai_next;	/* next structure in linked list */
78};
79
80extern void freeaddrinfo (struct addrinfo *);
81extern void freehostent (struct hostent *);
82extern int getnameinfo (const struct sockaddr *, size_t, char *,
83			    size_t, char *, size_t, int);
84extern struct hostent *getipnodebyaddr (const void *, size_t, int, int *);
85extern struct hostent *getipnodebyname (const char *, int, int, int *);
86extern int inet_pton (int, const char *, void *);
87extern const char *inet_ntop (int, const void *, char *, size_t);
88#endif /* HAVE_ADDRINFO */
89
90/*
91 * Constants for getnameinfo()
92 */
93#ifndef NI_MAXHOST
94#define	NI_MAXHOST	1025
95#endif
96#ifndef NI_MAXSERV
97#define	NI_MAXSERV	32
98#endif
99
100/*
101 * Flag values for getnameinfo()
102 */
103#ifndef NI_NOFQDN
104#define	NI_NOFQDN	0x00000001
105#endif
106#ifndef NI_NUMERICHOST
107#define	NI_NUMERICHOST	0x00000002
108#endif
109#ifndef NI_NAMEREQD
110#define	NI_NAMEREQD	0x00000004
111#endif
112#ifndef NI_NUMERICSERV
113#define	NI_NUMERICSERV	0x00000008
114#endif
115#ifndef NI_DGRAM
116#define	NI_DGRAM	0x00000010
117#endif
118