/* $NetBSD: iso_addr.c,v 1.15 2013/03/01 18:25:16 joerg Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)iso_addr.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: iso_addr.c,v 1.15 2013/03/01 18:25:16 joerg Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <assert.h>
#include <string.h>
struct iso_addr {
uint8_t isoa_len; /* length (in bytes) */
char isoa_genaddr[20]; /* general opaque address */
};
__BEGIN_DECLS
struct iso_addr *iso_addr(const char *);
char *iso_ntoa(const struct iso_addr *);
__END_DECLS
/* States*/
#define VIRGIN 0
#define GOTONE 1
#define GOTTWO 2
/* Inputs */
#define DIGIT (4*0)
#define END (4*1)
#define DELIM (4*2)
struct iso_addr *
iso_addr(const char *addr)
{
static struct iso_addr out_addr;
register char *cp = out_addr.isoa_genaddr;
char *cplim = cp + sizeof(out_addr.isoa_genaddr);
register int byte = 0, state = VIRGIN;
register int newaddr = 0; /* pacify gcc */
_DIAGASSERT(addr != NULL);
(void)memset(&out_addr, 0, sizeof (out_addr));
do {
if ((*addr >= '0') && (*addr <= '9')) {
newaddr = *addr - '0';
} else if ((*addr >= 'a') && (*addr <= 'f')) {
newaddr = *addr - 'a' + 10;
} else if ((*addr >= 'A') && (*addr <= 'F')) {
newaddr = *addr - 'A' + 10;
} else if (*addr == 0)
state |= END;
else
state |= DELIM;
addr++;
switch (state /* | INPUT */) {
case GOTTWO | DIGIT:
*cp++ = byte; /*FALLTHROUGH*/
case VIRGIN | DIGIT:
state = GOTONE; byte = newaddr; continue;
case GOTONE | DIGIT:
state = GOTTWO; byte = newaddr + (byte << 4); continue;
default: /* | DELIM */
state = VIRGIN; *cp++ = byte; byte = 0; continue;
case GOTONE | END:
case GOTTWO | END:
*cp++ = byte; /* FALLTHROUGH */
case VIRGIN | END:
break;
}
break;
} while (cp < cplim);
_DIAGASSERT(__type_fit(uint8_t, cp - out_addr.isoa_genaddr));
out_addr.isoa_len = (uint8_t)(cp - out_addr.isoa_genaddr);
return (&out_addr);
}
static const char hexlist[16] = "0123456789abcdef";
char *
iso_ntoa(const struct iso_addr *isoa)
{
static char obuf[64];
char *out = obuf;
size_t i;
const u_char *in = (const u_char *)isoa->isoa_genaddr;
const u_char *inlim = in + isoa->isoa_len;
_DIAGASSERT(isoa != NULL);
out[1] = 0;
while (in < inlim) {
i = *in++;
*out++ = '.';
if (i > 0xf) {
out[1] = hexlist[i & 0xf];
i >>= 4;
out[0] = hexlist[i];
out += 2;
} else
*out++ = hexlist[i];
}
*out = 0;
return(obuf + 1);
}
