1/*	$NetBSD: hostent.h,v 1.2 2013/08/27 09:56:12 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#ifndef _DNS_NET_HOSTENT_H
32#define _DNS_NET_HOSTENT_H
33
34#include <stdio.h>
35#include <netdb.h>
36#include <stdarg.h>
37
38/*
39 * These are not being advertised because the interfaces are non-standard.
40 * There are versions by linux, aix, qnx, sun, etc. Our versions are used
41 * internally to provide thread safety; they mostly resemble qnx.
42 */
43void sethostent_r(FILE **);
44struct hostent	*netbsd_gethostent_r(FILE *, struct hostent *, char *, size_t, int *);
45void endhostent_r(FILE **);
46
47/*
48 * The following are internal API's and are used only for testing.
49 */
50struct getnamaddr {
51	struct hostent *hp;
52	char *buf;
53	size_t buflen;
54	int *he;
55};
56
57/* /etc/hosts lookup */
58int _hf_gethtbyaddr(void *, void *, va_list);
59int _hf_gethtbyname(void *, void *, va_list);
60
61#ifdef YP
62/* NIS lookup */
63int _yp_gethtbyaddr(void *, void *, va_list);
64int _yp_gethtbyname(void *, void *, va_list);
65#endif
66
67#define HENT_ARRAY(dst, anum, ptr, len) \
68	do { \
69		size_t _len = (anum + 1) * sizeof(*dst); \
70		if (_len > len) \
71			goto nospc; \
72		dst = (void *)ptr; \
73		ptr += _len; \
74		len -= _len; \
75	} while (/*CONSTCOND*/0)
76
77#define HENT_COPY(dst, src, slen, ptr, len) \
78	do { \
79		if ((size_t)slen > len) \
80			goto nospc; \
81		memcpy(ptr, src, (size_t)slen); \
82		dst = ptr; \
83		ptr += slen; \
84		len -= slen; \
85	} while (/* CONSTCOND */0)
86
87#define HENT_SCOPY(dst, src, ptr, len) \
88	do { \
89		size_t _len = strlen(src) + 1; \
90		HENT_COPY(dst, src, _len, ptr, len); \
91	} while (/* CONSTCOND */0)
92
93#endif /* _DNS_NET_HOSTENT_H */
94