1/*-
2 * SPDX-License-Identifier: ISC
3 *
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1996,1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#include "port_before.h"
21
22#include <sys/types.h>
23#include <sys/socket.h>
24#include <netinet/in.h>
25#include <arpa/inet.h>
26
27#include <errno.h>
28#include <stdio.h>
29#include <string.h>
30
31#include "port_after.h"
32
33#ifdef SPRINTF_CHAR
34# define SPRINTF(x) strlen(sprintf/**/x)
35#else
36# define SPRINTF(x) ((size_t)sprintf x)
37#endif
38
39/*%
40 * char *
41 * inet_neta(src, dst, size)
42 *	format an in_addr_t network number into presentation format.
43 * return:
44 *	pointer to dst, or NULL if an error occurred (check errno).
45 * note:
46 *	format of ``src'' is as for inet_network().
47 * author:
48 *	Paul Vixie (ISC), July 1996
49 */
50char *
51inet_neta(in_addr_t src, char *dst, size_t size)
52{
53	char *odst = dst;
54	char *tp;
55
56	while (src & 0xffffffff) {
57		u_char b = (src & 0xff000000) >> 24;
58
59		src <<= 8;
60		if (b) {
61			if (size < sizeof "255.")
62				goto emsgsize;
63			tp = dst;
64			dst += SPRINTF((dst, "%u", b));
65			if (src != 0L) {
66				*dst++ = '.';
67				*dst = '\0';
68			}
69			size -= (size_t)(dst - tp);
70		}
71	}
72	if (dst == odst) {
73		if (size < sizeof "0.0.0.0")
74			goto emsgsize;
75		strcpy(dst, "0.0.0.0");
76	}
77	return (odst);
78
79 emsgsize:
80	errno = EMSGSIZE;
81	return (NULL);
82}
83
84/*
85 * Weak aliases for applications that use certain private entry points,
86 * and fail to include <arpa/inet.h>.
87 */
88#undef inet_neta
89__weak_reference(__inet_neta, inet_neta);
90
91/*! \file */
92