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/*
* Copyright (c) 1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $Id: inet_ntop.c,v 1.7 2003/11/16 09:36:50 guy Exp $ */
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/missing/inet_ntop.c,v 1.7 2003/11/16 09:36:50 guy Exp $";
#endif
/* we aren't tcpdump :) */
#ifdef notdef
#include <tcpdump-stdinc.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#ifndef WIN32
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#else /* WIN32 */
#include <time.h>
#include <winsock2.h>
#ifdef DO_IPV6
#include <ws2tcpip.h>
#endif /* DO_IPV6 */
#include <windows.h>
/* The below are copied from netlib.h */
#ifdef errno
/* delete the one from stdlib.h */
/*#define errno (*_errno()) */
#undef errno
#endif
#define errno GetLastError()
#define Set_errno(num) SetLastError((num))
/* INVALID_SOCKET == INVALID_HANDLE_VALUE == (unsigned int)(~0) */
/* SOCKET_ERROR == -1 */
#define ENOTSOCK WSAENOTSOCK
#define EINTR WSAEINTR
#define ENOBUFS WSAENOBUFS
#define EWOULDBLOCK WSAEWOULDBLOCK
#define EAFNOSUPPORT WSAEAFNOSUPPORT
/* from public\sdk\inc\crt\errno.h */
#define ENOSPC 28
#endif /* WIN32 */
/*
*
*/
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
static const char *
inet_ntop_v4 (const void *src, char *dst, size_t size)
{
const char digits[] = "0123456789";
int i;
struct in_addr *addr = (struct in_addr *)src;
u_long a = ntohl(addr->s_addr);
const char *orig_dst = dst;
if (size < INET_ADDRSTRLEN) {
Set_errno(ENOSPC);
return NULL;
}
for (i = 0; i < 4; ++i) {
int n = (a >> (24 - i * 8)) & 0xFF;
int non_zerop = 0;
if (non_zerop || n / 100 > 0) {
*dst++ = digits[n / 100];
n %= 100;
non_zerop = 1;
}
if (non_zerop || n / 10 > 0) {
*dst++ = digits[n / 10];
n %= 10;
non_zerop = 1;
}
*dst++ = digits[n];
if (i != 3)
*dst++ = '.';
}
*dst++ = '\0';
return orig_dst;
}
const char *
inet_ntop(int af, const void *src, char *dst, size_t size)
{
switch (af) {
case AF_INET :
return inet_ntop_v4 (src, dst, size);
default :
Set_errno(EAFNOSUPPORT);
return NULL;
}
}
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