1 /*
2 * Copyright (c) 1986 Regents of the University of California.
3 * 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)ns_ntoa.c 6.6 (Berkeley) 2/24/91";
36 #endif /* LIBC_SCCS and not lint */
37
38 #include <sys/param.h>
39 #include <netns/ns.h>
40 #include <stdio.h>
41
42 char *
ns_ntoa(addr)43 ns_ntoa(addr)
44 struct ns_addr addr;
45 {
46 static char obuf[40];
47 union { union ns_net net_e; u_long long_e; } net;
48 u_short port = htons(addr.x_port);
49 register char *cp;
50 char *cp2;
51 register u_char *up = addr.x_host.c_host;
52 u_char *uplim = up + 6;
53 static char *spectHex();
54
55 net.net_e = addr.x_net;
56 sprintf(obuf, "%lx", ntohl(net.long_e));
57 cp = spectHex(obuf);
58 cp2 = cp + 1;
59 while (*up==0 && up < uplim) up++;
60 if (up == uplim) {
61 if (port) {
62 sprintf(cp, ".0");
63 cp += 2;
64 }
65 } else {
66 sprintf(cp, ".%x", *up++);
67 while (up < uplim) {
68 while (*cp) cp++;
69 sprintf(cp, "%02x", *up++);
70 }
71 cp = spectHex(cp2);
72 }
73 if (port) {
74 sprintf(cp, ".%x", port);
75 spectHex(cp + 1);
76 }
77 return (obuf);
78 }
79
80 static char *
spectHex(p0)81 spectHex(p0)
82 char *p0;
83 {
84 int ok = 0;
85 int nonzero = 0;
86 register char *p = p0;
87 for (; *p; p++) switch (*p) {
88
89 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
90 *p += ('A' - 'a');
91 /* fall into . . . */
92 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
93 ok = 1;
94 case '1': case '2': case '3': case '4': case '5':
95 case '6': case '7': case '8': case '9':
96 nonzero = 1;
97 }
98 if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
99 return (p);
100 }
101