net.subproj/ns_ntoa.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  */
  54
  55
  56 #include <sys/param.h>
  57 #include <netns/ns.h>
  58 #include <stdio.h>
  59
  60 char *
  61 ns_ntoa(addr)
  62         struct ns_addr addr;
  63 {
  64         static char obuf[40];
  65         union { union ns_net net_e; u_long long_e; } net;
  66         u_short port = htons(addr.x_port);
  67         register char *cp;
  68         char *cp2;
  69         register u_char *up = addr.x_host.c_host;
  70         u_char *uplim = up + 6;
  71         static char *spectHex();
  72
  73         net.net_e = addr.x_net;
  74         sprintf(obuf, "%lx", ntohl(net.long_e));
  75         cp = spectHex(obuf);
  76         cp2 = cp + 1;
  77         while (*up==0 && up < uplim) up++;
  78         if (up == uplim) {
  79                 if (port) {
  80                         sprintf(cp, ".0");
  81                         cp += 2;
  82                 }
  83         } else {
  84                 sprintf(cp, ".%x", *up++);
  85                 while (up < uplim) {
  86                         while (*cp) cp++;
  87                         sprintf(cp, "%02x", *up++);
  88                 }
  89                 cp = spectHex(cp2);
  90         }
  91         if (port) {
  92                 sprintf(cp, ".%x", port);
  93                 spectHex(cp + 1);
  94         }
  95         return (obuf);
  96 }
  97
  98 static char *
  99 spectHex(p0)
 100         char *p0;
 101 {
 102         int ok = 0;
 103         int nonzero = 0;
 104         register char *p = p0;
 105         for (; *p; p++) switch (*p) {
 106
 107         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 108                 *p += ('A' - 'a');
 109                 /* fall into . . . */
 110         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 111                 ok = 1;
 112         case '1': case '2': case '3': case '4': case '5':
 113         case '6': case '7': case '8': case '9':
 114                 nonzero = 1;
 115         }
 116         if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
 117         return (p);
 118 }