1 /* $NetBSD: iso_addr.c,v 1.12 2005/11/29 03:11:59 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 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[] = "@(#)iso_addr.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: iso_addr.c,v 1.12 2005/11/29 03:11:59 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <sys/types.h> 42 #include <netiso/iso.h> 43 44 #include <assert.h> 45 #include <string.h> 46 47 /* States*/ 48 #define VIRGIN 0 49 #define GOTONE 1 50 #define GOTTWO 2 51 /* Inputs */ 52 #define DIGIT (4*0) 53 #define END (4*1) 54 #define DELIM (4*2) 55 56 struct iso_addr * 57 iso_addr(addr) 58 register const char *addr; 59 { 60 static struct iso_addr out_addr; 61 register char *cp = out_addr.isoa_genaddr; 62 char *cplim = cp + sizeof(out_addr.isoa_genaddr); 63 register int byte = 0, state = VIRGIN; 64 register int newaddr = 0; /* pacify gcc */ 65 66 _DIAGASSERT(addr != NULL); 67 68 (void)memset(&out_addr, 0, sizeof (out_addr)); 69 do { 70 if ((*addr >= '0') && (*addr <= '9')) { 71 newaddr = *addr - '0'; 72 } else if ((*addr >= 'a') && (*addr <= 'f')) { 73 newaddr = *addr - 'a' + 10; 74 } else if ((*addr >= 'A') && (*addr <= 'F')) { 75 newaddr = *addr - 'A' + 10; 76 } else if (*addr == 0) 77 state |= END; 78 else 79 state |= DELIM; 80 addr++; 81 switch (state /* | INPUT */) { 82 case GOTTWO | DIGIT: 83 *cp++ = byte; /*FALLTHROUGH*/ 84 case VIRGIN | DIGIT: 85 state = GOTONE; byte = newaddr; continue; 86 case GOTONE | DIGIT: 87 state = GOTTWO; byte = newaddr + (byte << 4); continue; 88 default: /* | DELIM */ 89 state = VIRGIN; *cp++ = byte; byte = 0; continue; 90 case GOTONE | END: 91 case GOTTWO | END: 92 *cp++ = byte; /* FALLTHROUGH */ 93 case VIRGIN | END: 94 break; 95 } 96 break; 97 } while (cp < cplim); 98 out_addr.isoa_len = cp - out_addr.isoa_genaddr; 99 return (&out_addr); 100 } 101 102 static const char hexlist[16] = "0123456789abcdef"; 103 104 char * 105 iso_ntoa(isoa) 106 const struct iso_addr *isoa; 107 { 108 static char obuf[64]; 109 char *out = obuf; 110 size_t i; 111 const u_char *in = (const u_char *)isoa->isoa_genaddr; 112 const u_char *inlim = in + isoa->isoa_len; 113 114 _DIAGASSERT(isoa != NULL); 115 116 out[1] = 0; 117 while (in < inlim) { 118 i = *in++; 119 *out++ = '.'; 120 if (i > 0xf) { 121 out[1] = hexlist[i & 0xf]; 122 i >>= 4; 123 out[0] = hexlist[i]; 124 out += 2; 125 } else 126 *out++ = hexlist[i]; 127 } 128 *out = 0; 129 return(obuf + 1); 130 } 131