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 */ 43 void sethostent_r(FILE **); 44 struct hostent *netbsd_gethostent_r(FILE *, struct hostent *, char *, size_t, int *); 45 void endhostent_r(FILE **); 46 47 /* 48 * The following are internal API's and are used only for testing. 49 */ 50 struct getnamaddr { 51 struct hostent *hp; 52 char *buf; 53 size_t buflen; 54 int *he; 55 }; 56 57 /* /etc/hosts lookup */ 58 int _hf_gethtbyaddr(void *, void *, va_list); 59 int _hf_gethtbyname(void *, void *, va_list); 60 61 #ifdef YP 62 /* NIS lookup */ 63 int _yp_gethtbyaddr(void *, void *, va_list); 64 int _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
