openbsd-compat/inet_ntoa.c

   1 /* OPENBSD ORIGINAL: lib/libc/net/inet_ntoa.c */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "includes.h"
  33
  34 #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA)
  35
  36 #if defined(LIBC_SCCS) && !defined(lint)
  37 static char rcsid[] = "$OpenBSD: inet_ntoa.c,v 1.4 2003/06/02 20:18:35 millert Exp $";
  38 #endif /* LIBC_SCCS and not lint */
  39
  40 /*
  41  * Convert network-format internet address
  42  * to base 256 d.d.d.d representation.
  43  */
  44 #include <sys/types.h>
  45 #include <netinet/in.h>
  46 #include <arpa/inet.h>
  47 #include <stdio.h>
  48
  49 char *inet_ntoa(struct in_addr in)
  50 {
  51         static char b[18];
  52         register char *p;
  53
  54         p = (char *)&in;
  55 #define UC(b)   (((int)b)&0xff)
  56         (void)snprintf(b, sizeof(b),
  57             "%u.%u.%u.%u", UC(p[0]), UC(p[1]), UC(p[2]), UC(p[3]));
  58         return (b);
  59 }
  60
  61 #endif /* defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA) */