lib/libipx/ipx_ntoa.c

   1 /*
   2  * Copyright (c) 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)ipx_ntoa.c
  30  * $DragonFly: src/lib/libipx/ipx_ntoa.c,v 1.5 2005/08/04 17:27:09 drhodus Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <netipx/ipx.h>
  35 #include <stdio.h>
  36
  37
  38 static char *spectHex(char *);
  39
  40 char *
  41 ipx_ntoa(struct ipx_addr addr)
  42 {
  43         static char obuf[40];
  44         union { union ipx_net net_e; u_long long_e; } net;
  45         u_short port = htons(addr.x_port);
  46         char *cp;
  47         char *cp2;
  48         u_char *up = addr.x_host.c_host;
  49         u_char *uplim = up + 6;
  50
  51         net.net_e = addr.x_net;
  52         sprintf(obuf, "%lx", (u_long)ntohl(net.long_e));
  53         cp = spectHex(obuf);
  54         cp2 = cp + 1;
  55         while (*up==0 && up < uplim) up++;
  56         if (up == uplim) {
  57                 if (port) {
  58                         sprintf(cp, ".0");
  59                         cp += 2;
  60                 }
  61         } else {
  62                 sprintf(cp, ".%x", *up++);
  63                 while (up < uplim) {
  64                         while (*cp) cp++;
  65                         sprintf(cp, "%02x", *up++);
  66                 }
  67                 cp = spectHex(cp2);
  68         }
  69         if (port) {
  70                 sprintf(cp, ".%x", port);
  71                 spectHex(cp + 1);
  72         }
  73         return (obuf);
  74 }
  75
  76 static char *
  77 spectHex(char *p0)
  78 {
  79         int ok = 0;
  80         int nonzero = 0;
  81         char *p = p0;
  82         for (; *p; p++) switch (*p) {
  83
  84         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
  85         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
  86                 ok = 1;
  87         case '1': case '2': case '3': case '4': case '5':
  88         case '6': case '7': case '8': case '9':
  89                 nonzero = 1;
  90         }
  91         if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
  92         return (p);
  93 }