inet_neta.c revision 156953
155714Skris/* 2109998Smarkm * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3109998Smarkm * Copyright (c) 1996,1999 by Internet Software Consortium. 4109998Smarkm * 5109998Smarkm * Permission to use, copy, modify, and distribute this software for any 6109998Smarkm * purpose with or without fee is hereby granted, provided that the above 7109998Smarkm * copyright notice and this permission notice appear in all copies. 8109998Smarkm * 9109998Smarkm * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10280304Sjkim * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11109998Smarkm * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12109998Smarkm * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13109998Smarkm * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14109998Smarkm * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15109998Smarkm * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16109998Smarkm */ 17109998Smarkm 18109998Smarkm#if defined(LIBC_SCCS) && !defined(lint) 19109998Smarkmstatic const char rcsid[] = "$Id: inet_neta.c,v 1.1.206.1 2004/03/09 08:33:33 marka Exp $"; 20109998Smarkm#endif 21109998Smarkm 22109998Smarkm#include "port_before.h" 23109998Smarkm 24109998Smarkm#include <sys/types.h> 25109998Smarkm#include <sys/socket.h> 26109998Smarkm#include <netinet/in.h> 27109998Smarkm#include <arpa/inet.h> 28109998Smarkm 29109998Smarkm#include <errno.h> 30109998Smarkm#include <stdio.h> 31109998Smarkm#include <string.h> 32109998Smarkm 33109998Smarkm#include "port_after.h" 34109998Smarkm 35109998Smarkm#ifdef SPRINTF_CHAR 36109998Smarkm# define SPRINTF(x) strlen(sprintf/**/x) 37109998Smarkm#else 38109998Smarkm# define SPRINTF(x) ((size_t)sprintf x) 39109998Smarkm#endif 40109998Smarkm 41109998Smarkm/* 42109998Smarkm * char * 43109998Smarkm * inet_neta(src, dst, size) 44109998Smarkm * format a u_long network number into presentation format. 45109998Smarkm * return: 46109998Smarkm * pointer to dst, or NULL if an error occurred (check errno). 47109998Smarkm * note: 48109998Smarkm * format of ``src'' is as for inet_network(). 49109998Smarkm * author: 50109998Smarkm * Paul Vixie (ISC), July 1996 51109998Smarkm */ 52109998Smarkmchar * 53109998Smarkminet_neta(src, dst, size) 54109998Smarkm u_long src; 5555714Skris char *dst; 56109998Smarkm size_t size; 57109998Smarkm{ 5855714Skris char *odst = dst; 59280304Sjkim char *tp; 6055714Skris 6155714Skris while (src & 0xffffffff) { 6255714Skris u_char b = (src & 0xff000000) >> 24; 6355714Skris 6455714Skris src <<= 8; 65109998Smarkm if (b) { 66109998Smarkm if (size < sizeof "255.") 67109998Smarkm goto emsgsize; 68109998Smarkm tp = dst; 69109998Smarkm dst += SPRINTF((dst, "%u", b)); 70109998Smarkm if (src != 0L) { 71280304Sjkim *dst++ = '.'; 72109998Smarkm *dst = '\0'; 73280304Sjkim } 74280304Sjkim size -= (size_t)(dst - tp); 75280304Sjkim } 76280304Sjkim } 77280304Sjkim if (dst == odst) { 78109998Smarkm if (size < sizeof "0.0.0.0") 79280304Sjkim goto emsgsize; 80280304Sjkim strcpy(dst, "0.0.0.0"); 81280304Sjkim } 82280304Sjkim return (odst); 83280304Sjkim 84160814Ssimon emsgsize: 85280304Sjkim errno = EMSGSIZE; 86109998Smarkm return (NULL); 87280304Sjkim} 88280304Sjkim