106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
|
|
* 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 1.3 2000/01/09 21:35:45 fenner Exp $ */
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/missing/inet_ntop.c,v 1.3 2000/01/09 21:35:45 fenner Exp $";
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
#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) {
|
|
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 :
|
|
errno = EAFNOSUPPORT;
|
|
return NULL;
|
|
}
|
|
}
|