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iso_addr.c revision 1.3 
      1 /*
      2  * Copyright (c) 1989 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 = "from: @(#)iso_addr.c	5.4 (Berkeley) 2/24/91";*/
     36 static char *rcsid = "$Id: iso_addr.c,v 1.3 1993/08/26 00:46:08 jtc Exp $";
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #include <sys/types.h>
     40 #include <netiso/iso.h>
     41 #include <string.h>
     42 
     43 /* States*/
     44 #define VIRGIN	0
     45 #define GOTONE	1
     46 #define GOTTWO	2
     47 /* Inputs */
     48 #define	DIGIT	(4*0)
     49 #define	END	(4*1)
     50 #define DELIM	(4*2)
     51 
     52 struct iso_addr *
     53 iso_addr(addr)
     54 	register const char *addr;
     55 {
     56 	static struct iso_addr out_addr;
     57 	register char *cp = out_addr.isoa_genaddr;
     58 	char *cplim = cp + sizeof(out_addr.isoa_genaddr);
     59 	register int byte = 0, state = VIRGIN, new;
     60 
     61 	bzero((char *)&out_addr, sizeof(out_addr));
     62 	do {
     63 		if ((*addr >= '0') && (*addr <= '9')) {
     64 			new = *addr - '0';
     65 		} else if ((*addr >= 'a') && (*addr <= 'f')) {
     66 			new = *addr - 'a' + 10;
     67 		} else if ((*addr >= 'A') && (*addr <= 'F')) {
     68 			new = *addr - 'A' + 10;
     69 		} else if (*addr == 0)
     70 			state |= END;
     71 		else
     72 			state |= DELIM;
     73 		addr++;
     74 		switch (state /* | INPUT */) {
     75 		case GOTTWO | DIGIT:
     76 			*cp++ = byte; /*FALLTHROUGH*/
     77 		case VIRGIN | DIGIT:
     78 			state = GOTONE; byte = new; continue;
     79 		case GOTONE | DIGIT:
     80 			state = GOTTWO; byte = new + (byte << 4); continue;
     81 		default: /* | DELIM */
     82 			state = VIRGIN; *cp++ = byte; byte = 0; continue;
     83 		case GOTONE | END:
     84 		case GOTTWO | END:
     85 			*cp++ = byte; /* FALLTHROUGH */
     86 		case VIRGIN | END:
     87 			break;
     88 		}
     89 		break;
     90 	} while (cp < cplim);
     91 	out_addr.isoa_len = cp - out_addr.isoa_genaddr;
     92 	return (&out_addr);
     93 }
     94 static char hexlist[] = "0123456789abcdef";
     95 
     96 char *
     97 iso_ntoa(isoa)
     98 	const struct iso_addr *isoa;
     99 {
    100 	static char obuf[64];
    101 	register char *out = obuf;
    102 	register int i;
    103 	register u_char *in = (u_char *)isoa->isoa_genaddr;
    104 	u_char *inlim = in + isoa->isoa_len;
    105 
    106 	out[1] = 0;
    107 	while (in < inlim) {
    108 		i = *in++;
    109 		*out++ = '.';
    110 		if (i > 0xf) {
    111 			out[1] = hexlist[i & 0xf];
    112 			i >>= 4;
    113 			out[0] = hexlist[i];
    114 			out += 2;
    115 		} else
    116 			*out++ = hexlist[i];
    117 	}
    118 	*out = 0;
    119 	return(obuf + 1);
    120 }
    121