1/* $NetBSD: intoa.c,v 1.2 2009/03/14 14:46:10 dsl Exp $ */ 2 3/* 4 * Copyright (c) 1992 Regents of the University of California. 5 * All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Lawrence Berkeley Laboratory and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL) 40 */ 41 42#include <sys/types.h> 43 44#if defined(_KERNEL) || defined(_STANDALONE) 45#include <lib/libkern/libkern.h> 46#else 47char *intoa(u_int32_t); /* XXX */ 48#endif 49 50/* Similar to inet_ntoa() */ 51char * 52intoa(u_int32_t addr) 53{ 54 char *cp; 55 u_int byte; 56 int n; 57 static char buf[17]; /* strlen(".255.255.255.255") + 1 */ 58 59 addr = ntohl(addr); 60 cp = &buf[sizeof buf]; 61 *--cp = '\0'; 62 63 n = 4; 64 do { 65 byte = addr & 0xff; 66 *--cp = byte % 10 + '0'; 67 byte /= 10; 68 if (byte > 0) { 69 *--cp = byte % 10 + '0'; 70 byte /= 10; 71 if (byte > 0) 72 *--cp = byte + '0'; 73 } 74 *--cp = '.'; 75 addr >>= 8; 76 } while (--n > 0); 77 78 return (cp+1); 79} 80