107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
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/* $NetBSD: hostent.h,v 1.2 2013/08/27 09:56:12 christos Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <netdb.h>
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#include <stdarg.h>
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/*
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* These are not being advertised because the interfaces are non-standard.
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* There are versions by linux, aix, qnx, sun, etc. Our versions are used
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* internally to provide thread safety; they mostly resemble qnx.
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*/
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void sethostent_r(FILE **);
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struct hostent *gethostent_r(FILE *, struct hostent *, char *, size_t, int *);
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void endhostent_r(FILE **);
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struct hostent *gethostbyname_r(const char *, struct hostent *, char *, size_t,
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int *);
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struct hostent *gethostbyname2_r(const char *, int, struct hostent *, char *,
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size_t, int *);
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struct hostent *gethostbyaddr_r(const void *, socklen_t, int, struct hostent *,
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char *, size_t, int *);
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extern FILE *_h_file;
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/*
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* The following are internal API's and are used only for testing.
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*/
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struct getnamaddr {
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struct hostent *hp;
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char *buf;
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size_t buflen;
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int *he;
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};
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/* /etc/hosts lookup */
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void _hf_sethostsfile(const char *);
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int _hf_gethtbyaddr(void *, void *, va_list);
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int _hf_gethtbyname(void *, void *, va_list);
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/* DNS lookup */
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int _dns_gethtbyaddr(void *, void *, va_list);
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int _dns_gethtbyname(void *, void *, va_list);
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#ifdef YP
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/* NIS lookup */
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int _yp_gethtbyaddr(void *, void *, va_list);
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int _yp_gethtbyname(void *, void *, va_list);
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#endif
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#define HENT_ARRAY(dst, anum, ptr, len) \
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do { \
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size_t _len = (anum + 1) * sizeof(*dst); \
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if (_len > len) \
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goto nospc; \
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dst = (void *)ptr; \
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ptr += _len; \
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len -= _len; \
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} while (/*CONSTCOND*/0)
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#define HENT_COPY(dst, src, slen, ptr, len) \
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do { \
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if ((size_t)slen > len) \
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goto nospc; \
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memcpy(ptr, src, (size_t)slen); \
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dst = ptr; \
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ptr += slen; \
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len -= slen; \
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} while (/* CONSTCOND */0)
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#define HENT_SCOPY(dst, src, ptr, len) \
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do { \
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size_t _len = strlen(src) + 1; \
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HENT_COPY(dst, src, _len, ptr, len); \
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} while (/* CONSTCOND */0)
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#define MAXALIASES 35
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#define MAXADDRS 35
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