diff options
Diffstat (limited to 'mit-pthreads/net/inet_ntoa.c')
| -rw-r--r-- | mit-pthreads/net/inet_ntoa.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/mit-pthreads/net/inet_ntoa.c b/mit-pthreads/net/inet_ntoa.c new file mode 100644 index 00000000000..cd206afcf2a --- /dev/null +++ b/mit-pthreads/net/inet_ntoa.c @@ -0,0 +1,85 @@ +/* + * 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); +} + |