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/*
* Copyright (c) 1983 Regents of the University of California.
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)inet_ntoa.c 5.6 (Berkeley) 2/24/91";*/
static char *rcsid = "$Id$";
#endif /* LIBC_SCCS and not lint */
/*
* Convert network-format internet address
* to base 256 d.d.d.d representation.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
char *inet_ntoa(struct in_addr in)
{
static pthread_mutex_t inet_ntoa_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_key_t inet_ntoa_key = -1;
char *buf, *inet_ntoa_r();
if (inet_ntoa_key < 0) {
pthread_mutex_lock(&inet_ntoa_mutex);
if (inet_ntoa_key < 0) {
if (pthread_key_create(&inet_ntoa_key, free) < 0) {
pthread_mutex_unlock(&inet_ntoa_mutex);
return(NULL);
}
}
pthread_mutex_unlock(&inet_ntoa_mutex);
}
if ((buf = pthread_getspecific(inet_ntoa_key)) == NULL) {
if ((buf = (char *) malloc(18)) == NULL) {
return(NULL);
}
pthread_setspecific(inet_ntoa_key, buf);
}
return inet_ntoa_r(in, buf, 18);
}
char *inet_ntoa_r(struct in_addr in, char *buf, int bufsize)
{
register char *p;
p = (char *)∈
#define UC(b) (((int)b)&0xff)
(void)snprintf(buf, bufsize,
"%d.%d.%d.%d", UC(p[0]), UC(p[1]), UC(p[2]), UC(p[3]));
return (buf);
}
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