workbench/network/stacks/AROSTCP/netlib/linkntoa.c

   1 /* $Id$
   2  *
   3  *      linkntoa.c - link level address printing
   4  *
   5  *      Copyright © 1994 AmiTCP/IP Group,
   6  *                       Network Solutions Development Inc.
   7  *                       All rights reserved.
   8  *
   9  *      Copyright © 1991 Regents of the University of California.
  10  */
  11
  12 #include <sys/types.h>
  13 #include <sys/socket.h>
  14 #include <net/if.h>
  15 #include <net/if_dl.h>
  16 #include <string.h>
  17
  18 static char hexlist[] = "0123456789abcdef";
  19
  20 char *
  21 link_ntoa(sdl)
  22         register const struct sockaddr_dl *sdl;
  23 {
  24         static char obuf[64];
  25         register char *out = obuf;
  26         register int i;
  27         register u_char *in = (u_char *)LLADDR(sdl);
  28         u_char *inlim = in + sdl->sdl_alen;
  29         int firsttime = 1;
  30
  31         if (sdl->sdl_nlen) {
  32                 bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
  33                 out += sdl->sdl_nlen;
  34                 *out++ = ':';
  35         }
  36         while (in < inlim) {
  37                 if (firsttime) firsttime = 0; else *out++ = '.';
  38                 i = *in++;
  39                 if (i > 0xf) {
  40                         out[1] = hexlist[i & 0xf];
  41                         i >>= 4;
  42                         out[0] = hexlist[i];
  43                         out += 2;
  44                 } else
  45                         *out++ = hexlist[i];
  46         }
  47         *out = 0;
  48         return(obuf);
  49 }
  50