1/*
2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3 *
4 * SPDX-License-Identifier: MPL-2.0
5 *
6 * This Source Code Form is subject to the terms of the Mozilla Public
7 * License, v. 2.0.  If a copy of the MPL was not distributed with this
8 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
9 *
10 * See the COPYRIGHT file distributed with this work for additional
11 * information regarding copyright ownership.
12 */
13
14/*! \file */
15
16#ifndef IRS_NETDB_H
17#define IRS_NETDB_H 1
18
19#include <stddef.h>	/* Required on FreeBSD (and  others?) for size_t. */
20#include <netdb.h>	/* Contractual provision. */
21
22/*
23 * Undefine all #defines we are interested in as <netdb.h> may or may not have
24 * defined them.
25 */
26
27/*
28 * Error return codes from gethostbyname() and gethostbyaddr()
29 * (left in extern int h_errno).
30 */
31
32#undef	NETDB_INTERNAL
33#undef	NETDB_SUCCESS
34#undef	HOST_NOT_FOUND
35#undef	TRY_AGAIN
36#undef	NO_RECOVERY
37#undef	NO_DATA
38#undef	NO_ADDRESS
39
40#define	NETDB_INTERNAL	-1	/* see errno */
41#define	NETDB_SUCCESS	0	/* no problem */
42#define	HOST_NOT_FOUND	1 /* Authoritative Answer Host not found */
43#define	TRY_AGAIN	2 /* Non-Authoritive Host not found, or SERVERFAIL */
44#define	NO_RECOVERY	3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
45#define	NO_DATA		4 /* Valid name, no data record of requested type */
46#define	NO_ADDRESS	NO_DATA		/* no address, look for MX record */
47
48/*
49 * Error return codes from getaddrinfo().  EAI_INSECUREDATA is our own extension
50 * and it's very unlikely to be already defined, but undef it just in case; it
51 * at least doesn't do any harm.
52 */
53
54#undef	EAI_ADDRFAMILY
55#undef	EAI_AGAIN
56#undef	EAI_BADFLAGS
57#undef	EAI_FAIL
58#undef	EAI_FAMILY
59#undef	EAI_MEMORY
60#undef	EAI_NODATA
61#undef	EAI_NONAME
62#undef	EAI_SERVICE
63#undef	EAI_SOCKTYPE
64#undef	EAI_SYSTEM
65#undef	EAI_BADHINTS
66#undef	EAI_PROTOCOL
67#undef	EAI_OVERFLOW
68#undef	EAI_INSECUREDATA
69#undef	EAI_MAX
70
71#define	EAI_ADDRFAMILY	 1	/* address family for hostname not supported */
72#define	EAI_AGAIN	 2	/* temporary failure in name resolution */
73#define	EAI_BADFLAGS	 3	/* invalid value for ai_flags */
74#define	EAI_FAIL	 4	/* non-recoverable failure in name resolution */
75#define	EAI_FAMILY	 5	/* ai_family not supported */
76#define	EAI_MEMORY	 6	/* memory allocation failure */
77#define	EAI_NODATA	 7	/* no address associated with hostname */
78#define	EAI_NONAME	 8	/* hostname nor servname provided, or not known */
79#define	EAI_SERVICE	 9	/* servname not supported for ai_socktype */
80#define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
81#define	EAI_SYSTEM	11	/* system error returned in errno */
82#define EAI_BADHINTS	12
83#define EAI_PROTOCOL	13
84#define EAI_OVERFLOW	14
85#define EAI_INSECUREDATA 15
86#define EAI_MAX		16
87
88/*
89 * Flag values for getaddrinfo()
90 */
91#undef	AI_PASSIVE
92#undef	AI_CANONNAME
93#undef	AI_NUMERICHOST
94
95#define	AI_PASSIVE	0x00000001
96#define	AI_CANONNAME	0x00000002
97#define AI_NUMERICHOST	0x00000004
98
99/*
100 * Flag values for getipnodebyname()
101 */
102#undef AI_V4MAPPED
103#undef AI_ALL
104#undef AI_ADDRCONFIG
105#undef AI_DEFAULT
106
107#define AI_V4MAPPED	0x00000008
108#define AI_ALL		0x00000010
109#define AI_ADDRCONFIG	0x00000020
110#define AI_DEFAULT	(AI_V4MAPPED|AI_ADDRCONFIG)
111
112/*
113 * Constants for getnameinfo()
114 */
115#undef	NI_MAXHOST
116#undef	NI_MAXSERV
117
118#define	NI_MAXHOST	1025
119#define	NI_MAXSERV	32
120
121/*
122 * Flag values for getnameinfo()
123 */
124#undef	NI_NOFQDN
125#undef	NI_NUMERICHOST
126#undef	NI_NAMEREQD
127#undef	NI_NUMERICSERV
128#undef	NI_DGRAM
129#undef	NI_NUMERICSCOPE
130
131#define	NI_NOFQDN	0x00000001
132#define	NI_NUMERICHOST	0x00000002
133#define	NI_NAMEREQD	0x00000004
134#define	NI_NUMERICSERV	0x00000008
135#define	NI_DGRAM	0x00000010
136
137/*
138 * Define to map into irs_ namespace.
139 */
140
141#ifndef __NetBSD__
142#define IRS_NAMESPACE
143#endif
144
145#ifdef IRS_NAMESPACE
146
147/*
148 * Use our versions not the ones from the C library.
149 */
150
151#ifdef getnameinfo
152#undef getnameinfo
153#endif
154#define getnameinfo irs_getnameinfo
155
156#ifdef getaddrinfo
157#undef getaddrinfo
158#endif
159#define getaddrinfo irs_getaddrinfo
160
161#ifdef freeaddrinfo
162#undef freeaddrinfo
163#endif
164#define freeaddrinfo irs_freeaddrinfo
165
166#ifdef gai_strerror
167#undef gai_strerror
168#endif
169#define gai_strerror irs_gai_strerror
170
171int
172getaddrinfo(const char *hostname, const char *servname,
173	    const struct addrinfo *hints, struct addrinfo **res);
174
175int
176getnameinfo(const struct sockaddr *sa, socklen_t salen,
177	    char *host, socklen_t hostlen,
178	    char *serv, socklen_t servlen,
179	    int flags);
180
181void freeaddrinfo (struct addrinfo *ai);
182
183const char *
184gai_strerror(int ecode);
185
186#endif /* IRS_NAMESPACE */
187
188/*
189 * Tell Emacs to use C mode on this file.
190 * Local variables:
191 * mode: c
192 * End:
193 */
194
195#endif /* IRS_NETDB_H */
196