1 /* $NetBSD: iso_addr.c,v 1.10 1999/09/20 04:39:15 lukem 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)iso_addr.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: iso_addr.c,v 1.10 1999/09/20 04:39:15 lukem Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <netiso/iso.h> 47 48 #include <assert.h> 49 #include <string.h> 50 51 /* States*/ 52 #define VIRGIN 0 53 #define GOTONE 1 54 #define GOTTWO 2 55 /* Inputs */ 56 #define DIGIT (4*0) 57 #define END (4*1) 58 #define DELIM (4*2) 59 60 struct iso_addr * 61 iso_addr(addr) 62 register const char *addr; 63 { 64 static struct iso_addr out_addr; 65 register char *cp = out_addr.isoa_genaddr; 66 char *cplim = cp + sizeof(out_addr.isoa_genaddr); 67 register int byte = 0, state = VIRGIN; 68 register int newaddr = 0; /* pacify gcc */ 69 70 _DIAGASSERT(addr != NULL); 71 72 (void)memset(&out_addr, 0, sizeof (out_addr)); 73 do { 74 if ((*addr >= '0') && (*addr <= '9')) { 75 newaddr = *addr - '0'; 76 } else if ((*addr >= 'a') && (*addr <= 'f')) { 77 newaddr = *addr - 'a' + 10; 78 } else if ((*addr >= 'A') && (*addr <= 'F')) { 79 newaddr = *addr - 'A' + 10; 80 } else if (*addr == 0) 81 state |= END; 82 else 83 state |= DELIM; 84 addr++; 85 switch (state /* | INPUT */) { 86 case GOTTWO | DIGIT: 87 *cp++ = byte; /*FALLTHROUGH*/ 88 case VIRGIN | DIGIT: 89 state = GOTONE; byte = newaddr; continue; 90 case GOTONE | DIGIT: 91 state = GOTTWO; byte = newaddr + (byte << 4); continue; 92 default: /* | DELIM */ 93 state = VIRGIN; *cp++ = byte; byte = 0; continue; 94 case GOTONE | END: 95 case GOTTWO | END: 96 *cp++ = byte; /* FALLTHROUGH */ 97 case VIRGIN | END: 98 break; 99 } 100 break; 101 } while (cp < cplim); 102 out_addr.isoa_len = cp - out_addr.isoa_genaddr; 103 return (&out_addr); 104 } 105 106 static const char hexlist[16] = "0123456789abcdef"; 107 108 char * 109 iso_ntoa(isoa) 110 const struct iso_addr *isoa; 111 { 112 static char obuf[64]; 113 register char *out = obuf; 114 register size_t i; 115 register u_char *in = (u_char *)isoa->isoa_genaddr; 116 u_char *inlim = in + isoa->isoa_len; 117 118 _DIAGASSERT(isoa != NULL); 119 120 out[1] = 0; 121 while (in < inlim) { 122 i = *in++; 123 *out++ = '.'; 124 if (i > 0xf) { 125 out[1] = hexlist[i & 0xf]; 126 i >>= 4; 127 out[0] = hexlist[i]; 128 out += 2; 129 } else 130 *out++ = hexlist[i]; 131 } 132 *out = 0; 133 return(obuf + 1); 134 } 135