| Yabin Cui | 58d33a5 | 2014-12-16 17:03:44 -0800 | [diff] [blame] | 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 */ |