getipnodebyaddr.c revision 1.1.1.1
1/* $NetBSD: getipnodebyaddr.c,v 1.1.1.1 2011/04/13 18:15:41 elric Exp $ */ 2 3/* 4 * Copyright (c) 1999 Kungliga Tekniska H��gskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 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 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <config.h> 37 38#include <krb5/roken.h> 39 40/* 41 * lookup `src, len' (address family `af') in DNS and return a pointer 42 * to a malloced struct hostent or NULL. 43 */ 44 45ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL 46getipnodebyaddr (const void *src, size_t len, int af, int *error_num) 47{ 48 struct hostent *tmp; 49 50 tmp = gethostbyaddr (src, len, af); 51 if (tmp == NULL) { 52 switch (h_errno) { 53 case HOST_NOT_FOUND : 54 case TRY_AGAIN : 55 case NO_RECOVERY : 56 *error_num = h_errno; 57 break; 58 case NO_DATA : 59 *error_num = NO_ADDRESS; 60 break; 61 default : 62 *error_num = NO_RECOVERY; 63 break; 64 } 65 return NULL; 66 } 67 tmp = copyhostent (tmp); 68 if (tmp == NULL) { 69 *error_num = TRY_AGAIN; 70 return NULL; 71 } 72 return tmp; 73} 74