1169689Skan/* 2169689Skan * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3169689Skan * Copyright (c) 1996,1999 by Internet Software Consortium. 4169689Skan * 5169689Skan * Permission to use, copy, modify, and distribute this software for any 6169689Skan * purpose with or without fee is hereby granted, provided that the above 7169689Skan * copyright notice and this permission notice appear in all copies. 8169689Skan * 9169689Skan * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10169689Skan * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11169689Skan * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12169689Skan * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13169689Skan * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14169689Skan * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15169689Skan * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16169689Skan */ 17169689Skan 18169689Skan#if defined(LIBC_SCCS) && !defined(lint) 19169689Skanstatic const char rcsid[] = "$Id: inet_neta.c,v 1.3 2005/04/27 04:56:20 sra Exp $"; 20169689Skan#endif 21169689Skan#include <sys/cdefs.h> 22169689Skan__FBSDID("$FreeBSD$"); 23169689Skan 24169689Skan#include "port_before.h" 25169689Skan 26169689Skan#include <sys/types.h> 27169689Skan#include <sys/socket.h> 28169689Skan#include <netinet/in.h> 29169689Skan#include <arpa/inet.h> 30169689Skan 31169689Skan#include <errno.h> 32169689Skan#include <stdio.h> 33169689Skan#include <string.h> 34169689Skan 35169689Skan#include "port_after.h" 36169689Skan 37169689Skan#ifdef SPRINTF_CHAR 38169689Skan# define SPRINTF(x) strlen(sprintf/**/x) 39169689Skan#else 40169689Skan# define SPRINTF(x) ((size_t)sprintf x) 41169689Skan#endif 42169689Skan 43169689Skan/*% 44169689Skan * char * 45169689Skan * inet_neta(src, dst, size) 46169689Skan * format an in_addr_t network number into presentation format. 47169689Skan * return: 48169689Skan * pointer to dst, or NULL if an error occurred (check errno). 49169689Skan * note: 50169689Skan * format of ``src'' is as for inet_network(). 51169689Skan * author: 52169689Skan * Paul Vixie (ISC), July 1996 53169689Skan */ 54char * 55inet_neta(src, dst, size) 56 in_addr_t src; 57 char *dst; 58 size_t size; 59{ 60 char *odst = dst; 61 char *tp; 62 63 while (src & 0xffffffff) { 64 u_char b = (src & 0xff000000) >> 24; 65 66 src <<= 8; 67 if (b) { 68 if (size < sizeof "255.") 69 goto emsgsize; 70 tp = dst; 71 dst += SPRINTF((dst, "%u", b)); 72 if (src != 0L) { 73 *dst++ = '.'; 74 *dst = '\0'; 75 } 76 size -= (size_t)(dst - tp); 77 } 78 } 79 if (dst == odst) { 80 if (size < sizeof "0.0.0.0") 81 goto emsgsize; 82 strcpy(dst, "0.0.0.0"); 83 } 84 return (odst); 85 86 emsgsize: 87 errno = EMSGSIZE; 88 return (NULL); 89} 90 91/* 92 * Weak aliases for applications that use certain private entry points, 93 * and fail to include <arpa/inet.h>. 94 */ 95#undef inet_neta 96__weak_reference(__inet_neta, inet_neta); 97 98/*! \file */ 99