inet_neta.c revision 270838
1127915Skientzle/* 2191240Skientzle * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3127915Skientzle * Copyright (c) 1996,1999 by Internet Software Consortium. 4228797Smm * 5228797Smm * Permission to use, copy, modify, and distribute this software for any 6127915Skientzle * purpose with or without fee is hereby granted, provided that the above 7248616Smm * copyright notice and this permission notice appear in all copies. 8228797Smm * 9228797Smm * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10203559Skientzle * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11203559Skientzle * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12248616Smm * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13203559Skientzle * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14203559Skientzle * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15203559Skientzle * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16203559Skientzle */ 17224153Smm 18228797Smm#if defined(LIBC_SCCS) && !defined(lint) 19224153Smmstatic const char rcsid[] = "$Id: inet_neta.c,v 1.3 2005/04/27 04:56:20 sra Exp $"; 20238856Smm#endif 21224153Smm#include <sys/cdefs.h> 22224566Smm__FBSDID("$FreeBSD: stable/10/lib/libc/inet/inet_neta.c 270838 2014-08-30 10:16:25Z ume $"); 23224566Smm 24191240Skientzle#include "port_before.h" 25204329Sru 26191240Skientzle#include <sys/types.h> 27224566Smm#include <sys/socket.h> 28224566Smm#include <netinet/in.h> 29224566Smm#include <arpa/inet.h> 30191240Skientzle 31224566Smm#include <errno.h> 32232153Smm#include <stdio.h> 33232153Smm#include <string.h> 34232153Smm 35232153Smm#include "port_after.h" 36175051Skientzle 37232153Smm#ifdef SPRINTF_CHAR 38228797Smm# define SPRINTF(x) strlen(sprintf/**/x) 39228797Smm#else 40137616Sru# define SPRINTF(x) ((size_t)sprintf x) 41128446Skientzle#endif 42184761Skientzle 43128446Skientzle/*% 44228797Smm * char * 45179322Skientzle * inet_neta(src, dst, size) 46228797Smm * format an in_addr_t network number into presentation format. 47175051Skientzle * return: 48228797Smm * pointer to dst, or NULL if an error occurred (check errno). 49228797Smm * note: 50228797Smm * format of ``src'' is as for inet_network(). 51127915Skientzle * author: 52 * Paul Vixie (ISC), July 1996 53 */ 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