sys/libkern/inet_ntoa.c

   1
   2 /*
   3  * Copyright 1994, 1995 Massachusetts Institute of Technology
   4  *
   5  * Permission to use, copy, modify, and distribute this software and
   6  * its documentation for any purpose and without fee is hereby
   7  * granted, provided that both the above copyright notice and this
   8  * permission notice appear in all copies, that both the above
   9  * copyright notice and this permission notice appear in all
  10  * supporting documentation, and that the name of M.I.T. not be used
  11  * in advertising or publicity pertaining to distribution of the
  12  * software without specific, written prior permission.  M.I.T. makes
  13  * no representations about the suitability of this software for any
  14  * purpose.  It is provided "as is" without express or implied
  15  * warranty.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  18  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  21  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  27  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/sys/libkern/inet_ntoa.c,v 1.2.16.1 2000/08/03 01:03:45 peter Exp $
  31  * $DragonFly: src/sys/libkern/inet_ntoa.c,v 1.5 2006/12/20 18:14:42 dillon Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36
  37 #include <netinet/in.h>
  38
  39 char *
  40 inet_ntoa(struct in_addr ina)
  41 {
  42         static char buf[sizeof "aaa.bbb.ccc.ddd"];
  43         unsigned char *ucp = (unsigned char *)&ina;
  44
  45         ksprintf(buf, "%d.%d.%d.%d",
  46                  ucp[0] & 0xff,
  47                  ucp[1] & 0xff,
  48                  ucp[2] & 0xff,
  49                  ucp[3] & 0xff);
  50         return buf;
  51 }
  52