1 /* $NetBSD: compat_ns_ntoa.c,v 1.1 2006/08/26 16:07:01 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)ns_ntoa.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: compat_ns_ntoa.c,v 1.1 2006/08/26 16:07:01 matt Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <sys/param.h> 42 #include <compat/include/ns.h> 43 44 #include <assert.h> 45 #include <stdio.h> 46 47 static char *spectHex __P((char *)); 48 49 char * 50 ns_ntoa(addr) 51 struct ns_addr addr; 52 { 53 static char obuf[40]; 54 union { union ns_net net_e; u_int32_t long_e; } net; 55 u_int16_t port = htons(addr.x_port); 56 char *cp; 57 char *cp2; 58 u_int8_t *up = addr.x_host.c_host; 59 u_int8_t *uplim = up + 6; 60 61 net.net_e = addr.x_net; 62 sprintf(obuf, "%x", ntohl(net.long_e)); 63 cp = spectHex(obuf); 64 cp2 = cp + 1; 65 while (up < uplim && *up==0) 66 up++; 67 if (up == uplim) { 68 if (port) { 69 sprintf(cp, ".0"); 70 cp += 2; 71 } 72 } else { 73 sprintf(cp, ".%x", *up++); 74 while (up < uplim) { 75 while (*cp) cp++; 76 sprintf(cp, "%02x", *up++); 77 } 78 cp = spectHex(cp2); 79 } 80 if (port) { 81 sprintf(cp, ".%x", port); 82 spectHex(cp + 1); 83 } 84 return (obuf); 85 } 86 87 static char * 88 spectHex(p0) 89 char *p0; 90 { 91 int ok = 0; 92 int nonzero = 0; 93 char *p = p0; 94 95 _DIAGASSERT(p0 != NULL); 96 97 for (; *p; p++) 98 switch (*p) { 99 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 100 *p += ('A' - 'a'); 101 /* FALLTHROUGH */ 102 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': 103 ok = 1; 104 /* FALLTHROUGH */ 105 case '1': case '2': case '3': case '4': case '5': 106 case '6': case '7': case '8': case '9': 107 nonzero = 1; 108 } 109 if (nonzero && !ok) { *p++ = 'H'; *p = 0; } 110 return (p); 111 } 112