lib/libc/net/ascii2addr.c

   1 /*
   2  * Copyright 1996 Massachusetts Institute of Technology
   3  *
   4  * Permission to use, copy, modify, and distribute this software and
   5  * its documentation for any purpose and without fee is hereby
   6  * granted, provided that both the above copyright notice and this
   7  * permission notice appear in all copies, that both the above
   8  * copyright notice and this permission notice appear in all
   9  * supporting documentation, and that the name of M.I.T. not be used
  10  * in advertising or publicity pertaining to distribution of the
  11  * software without specific, written prior permission.  M.I.T. makes
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied
  14  * warranty.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      $ANA: ascii2addr.c,v 1.2 1996/06/13 18:46:02 wollman Exp $
  30  * $DragonFly: src/lib/libc/net/ascii2addr.c,v 1.2 2005/11/13 03:04:47 swildner Exp $
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35
  36 #include <errno.h>
  37 #include <string.h>
  38
  39 #include <net/if_dl.h>
  40 #include <netinet/in.h>
  41 #include <arpa/inet.h>
  42
  43 int
  44 ascii2addr(int af, const char *ascii, void *result)
  45 {
  46         struct in_addr *ina;
  47         char strbuf[4*sizeof("123")]; /* long enough for V4 only */
  48
  49         switch(af) {
  50         case AF_INET:
  51                 ina = result;
  52                 strbuf[0] = '\0';
  53                 strncat(strbuf, ascii, (sizeof strbuf)-1);
  54                 if (inet_aton(strbuf, ina))
  55                         return sizeof(struct in_addr);
  56                 errno = EINVAL;
  57                 break;
  58
  59         case AF_LINK:
  60                 link_addr(ascii, result);
  61                 /* oops... no way to detect failure */
  62                 return sizeof(struct sockaddr_dl);
  63
  64         default:
  65                 errno = EPROTONOSUPPORT;
  66                 break;
  67         }
  68
  69         return -1;
  70 }