1 /* $NetBSD: arpaname.c,v 1.7 2025/01/26 16:25:10 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #include <stdio.h> 17 18 #include <isc/net.h> 19 20 #define UNUSED(x) (void)(x) 21 22 int 23 main(int argc, char *argv[]) { 24 unsigned char buf[16]; 25 int i; 26 27 UNUSED(argc); 28 29 while (argv[1]) { 30 if (inet_pton(AF_INET6, argv[1], buf) == 1) { 31 for (i = 15; i >= 0; i--) { 32 fprintf(stdout, "%X.%X.", buf[i] & 0xf, 33 (buf[i] >> 4) & 0xf); 34 } 35 fprintf(stdout, "IP6.ARPA\n"); 36 argv++; 37 continue; 38 } 39 if (inet_pton(AF_INET, argv[1], buf) == 1) { 40 fprintf(stdout, "%u.%u.%u.%u.IN-ADDR.ARPA\n", buf[3], 41 buf[2], buf[1], buf[0]); 42 argv++; 43 continue; 44 } 45 return 1; 46 } 47 fflush(stdout); 48 return ferror(stdout); 49 } 50