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 * 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 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
37
38 #include <sys/param.h>
39 #include <netns/ns.h>
40 #include <stdio.h>
41
42 static char *spectHex(char *p0);
43
44 char *
ns_ntoa(struct ns_addr addr)45 ns_ntoa(
46 struct ns_addr addr
47 )
48 {
49 static char obuf[40];
50 union { union ns_net net_e; u_long long_e; } net;
51 u_short port = htons(addr.x_port);
52 register char *cp;
53 char *cp2;
54 register u_char *up = addr.x_host.c_host;
55 u_char *uplim = up + 6;
56
57 net.net_e = addr.x_net;
58 sprintf(obuf, "%x", (UINT32)ntohl(net.long_e));
59 cp = spectHex(obuf);
60 cp2 = cp + 1;
61 while (*up==0 && up < uplim) up++;
62 if (up == uplim) {
63 if (port) {
64 sprintf(cp, ".0");
65 cp += 2;
66 }
67 } else {
68 sprintf(cp, ".%x", *up++);
69 while (up < uplim) {
70 while (*cp) cp++;
71 sprintf(cp, "%02x", *up++);
72 }
73 cp = spectHex(cp2);
74 }
75 if (port) {
76 sprintf(cp, ".%x", port);
77 spectHex(cp + 1);
78 }
79 return (obuf);
80 }
81
82 static char *
spectHex(char * p0)83 spectHex(
84 char *p0
85 )
86 {
87 int ok = 0;
88 int nonzero = 0;
89 register char *p = p0;
90 for (; *p; p++) switch (*p) {
91
92 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
93 *p += ('A' - 'a');
94 /* fall into . . . */
95 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
96 ok = 1;
97 case '1': case '2': case '3': case '4': case '5':
98 case '6': case '7': case '8': case '9':
99 nonzero = 1;
100 }
101 if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
102 return (p);
103 }
104