1 /* 2 * Copyright (c) 1999 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifdef HAVE_CONFIG_H 35 #include <config.h> 36 RCSID("$Id: getipnodebyaddr.c,v 1.2 1999/12/02 16:58:46 joda Exp $"); 37 #endif 38 39 #include "roken.h" 40 41 /* 42 * lookup `src, len' (address family `af') in DNS and return a pointer 43 * to a malloced struct hostent or NULL. 44 */ 45 46 struct hostent * 47 getipnodebyaddr (const void *src, size_t len, int af, int *error_num) 48 { 49 struct hostent *tmp; 50 51 tmp = gethostbyaddr (src, len, af); 52 if (tmp == NULL) { 53 switch (h_errno) { 54 case HOST_NOT_FOUND : 55 case TRY_AGAIN : 56 case NO_RECOVERY : 57 *error_num = h_errno; 58 break; 59 case NO_DATA : 60 *error_num = NO_ADDRESS; 61 break; 62 default : 63 *error_num = NO_RECOVERY; 64 break; 65 } 66 return NULL; 67 } 68 tmp = copyhostent (tmp); 69 if (tmp == NULL) { 70 *error_num = TRY_AGAIN; 71 return NULL; 72 } 73 return tmp; 74 } 75