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iso_addr.c revision 1.1 
      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[] = "@(#)iso_addr.c	5.4 (Berkeley) 2/24/91";
     36 #endif /* LIBC_SCCS and not lint */
     37 
     38 #include <sys/types.h>
     39 #include <netiso/iso.h>
     40 #include <string.h>
     41 
     42 /* States*/
     43 #define VIRGIN	0
     44 #define GOTONE	1
     45 #define GOTTWO	2
     46 /* Inputs */
     47 #define	DIGIT	(4*0)
     48 #define	END	(4*1)
     49 #define DELIM	(4*2)
     50 
     51 struct iso_addr *
     52 iso_addr(addr)
     53 	register const char *addr;
     54 {
     55 	static struct iso_addr out_addr;
     56 	register char *cp = out_addr.isoa_genaddr;
     57 	char *cplim = cp + sizeof(out_addr.isoa_genaddr);
     58 	register int byte = 0, state = VIRGIN, new;
     59 
     60 	bzero((char *)&out_addr, sizeof(out_addr));
     61 	do {
     62 		if ((*addr >= '0') && (*addr <= '9')) {
     63 			new = *addr - '0';
     64 		} else if ((*addr >= 'a') && (*addr <= 'f')) {
     65 			new = *addr - 'a' + 10;
     66 		} else if ((*addr >= 'A') && (*addr <= 'F')) {
     67 			new = *addr - 'A' + 10;
     68 		} else if (*addr == 0)
     69 			state |= END;
     70 		else
     71 			state |= DELIM;
     72 		addr++;
     73 		switch (state /* | INPUT */) {
     74 		case GOTTWO | DIGIT:
     75 			*cp++ = byte; /*FALLTHROUGH*/
     76 		case VIRGIN | DIGIT:
     77 			state = GOTONE; byte = new; continue;
     78 		case GOTONE | DIGIT:
     79 			state = GOTTWO; byte = new + (byte << 4); continue;
     80 		default: /* | DELIM */
     81 			state = VIRGIN; *cp++ = byte; byte = 0; continue;
     82 		case GOTONE | END:
     83 		case GOTTWO | END:
     84 			*cp++ = byte; /* FALLTHROUGH */
     85 		case VIRGIN | END:
     86 			break;
     87 		}
     88 		break;
     89 	} while (cp < cplim);
     90 	out_addr.isoa_len = cp - out_addr.isoa_genaddr;
     91 	return (&out_addr);
     92 }
     93 static char hexlist[] = "0123456789abcdef";
     94 
     95 char *
     96 iso_ntoa(isoa)
     97 	const struct iso_addr *isoa;
     98 {
     99 	static char obuf[64];
    100 	register char *out = obuf;
    101 	register int i;
    102 	register u_char *in = (u_char *)isoa->isoa_genaddr;
    103 	u_char *inlim = in + isoa->isoa_len;
    104 
    105 	out[1] = 0;
    106 	while (in < inlim) {
    107 		i = *in++;
    108 		*out++ = '.';
    109 		if (i > 0xf) {
    110 			out[1] = hexlist[i & 0xf];
    111 			i >>= 4;
    112 			out[0] = hexlist[i];
    113 			out += 2;
    114 		} else
    115 			*out++ = hexlist[i];
    116 	}
    117 	*out = 0;
    118 	return(obuf + 1);
    119 }
    120