1156952Sume/*
2156952Sume * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3156952Sume * Copyright (c) 1996,1999 by Internet Software Consortium.
4156952Sume *
5156952Sume * Permission to use, copy, modify, and distribute this software for any
6156952Sume * purpose with or without fee is hereby granted, provided that the above
7156952Sume * copyright notice and this permission notice appear in all copies.
8156952Sume *
9156952Sume * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10156952Sume * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11156952Sume * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
12156952Sume * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13156952Sume * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14156952Sume * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15156952Sume * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16156952Sume */
17156952Sume
18156952Sume#if defined(LIBC_SCCS) && !defined(lint)
19270838Sumestatic const char rcsid[] = "$Id: inet_neta.c,v 1.3 2005/04/27 04:56:20 sra Exp $";
20156952Sume#endif
21156956Sume#include <sys/cdefs.h>
22156956Sume__FBSDID("$FreeBSD$");
23156952Sume
24156952Sume#include "port_before.h"
25156952Sume
26156952Sume#include <sys/types.h>
27156952Sume#include <sys/socket.h>
28156952Sume#include <netinet/in.h>
29156952Sume#include <arpa/inet.h>
30156952Sume
31156952Sume#include <errno.h>
32156952Sume#include <stdio.h>
33156952Sume#include <string.h>
34156952Sume
35156952Sume#include "port_after.h"
36156952Sume
37156952Sume#ifdef SPRINTF_CHAR
38156952Sume# define SPRINTF(x) strlen(sprintf/**/x)
39156952Sume#else
40156952Sume# define SPRINTF(x) ((size_t)sprintf x)
41156952Sume#endif
42156952Sume
43170244Sume/*%
44156952Sume * char *
45156952Sume * inet_neta(src, dst, size)
46156956Sume *	format an in_addr_t network number into presentation format.
47156952Sume * return:
48156952Sume *	pointer to dst, or NULL if an error occurred (check errno).
49156952Sume * note:
50156952Sume *	format of ``src'' is as for inet_network().
51156952Sume * author:
52156952Sume *	Paul Vixie (ISC), July 1996
53156952Sume */
54156952Sumechar *
55156952Sumeinet_neta(src, dst, size)
56156956Sume	in_addr_t src;
57156952Sume	char *dst;
58156952Sume	size_t size;
59156952Sume{
60156952Sume	char *odst = dst;
61156952Sume	char *tp;
62156952Sume
63156952Sume	while (src & 0xffffffff) {
64156952Sume		u_char b = (src & 0xff000000) >> 24;
65156952Sume
66156952Sume		src <<= 8;
67156952Sume		if (b) {
68156952Sume			if (size < sizeof "255.")
69156952Sume				goto emsgsize;
70156952Sume			tp = dst;
71156952Sume			dst += SPRINTF((dst, "%u", b));
72156952Sume			if (src != 0L) {
73156952Sume				*dst++ = '.';
74156952Sume				*dst = '\0';
75156952Sume			}
76156952Sume			size -= (size_t)(dst - tp);
77156952Sume		}
78156952Sume	}
79156952Sume	if (dst == odst) {
80156952Sume		if (size < sizeof "0.0.0.0")
81156952Sume			goto emsgsize;
82156952Sume		strcpy(dst, "0.0.0.0");
83156952Sume	}
84156952Sume	return (odst);
85156952Sume
86156952Sume emsgsize:
87156952Sume	errno = EMSGSIZE;
88156952Sume	return (NULL);
89156952Sume}
90156956Sume
91156956Sume/*
92156956Sume * Weak aliases for applications that use certain private entry points,
93156956Sume * and fail to include <arpa/inet.h>.
94156956Sume */
95156956Sume#undef inet_neta
96156956Sume__weak_reference(__inet_neta, inet_neta);
97170244Sume
98170244Sume/*! \file */
99