[apple/libc.git] / net / FreeBSD / linkaddr.c

/*-
 * Copyright (c) 1990, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)linkaddr.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/net/linkaddr.c,v 1.3 2002/03/21 18:49:23 obrien Exp $");

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if_dl.h>
#include <string.h>

/* States*/
#define NAMING	0
#define GOTONE	1
#define GOTTWO	2
#define RESET	3
/* Inputs */
#define	DIGIT	(4*0)
#define	END	(4*1)
#define DELIM	(4*2)
#define LETTER	(4*3)

void
link_addr(addr, sdl)
	const char *addr;
	struct sockaddr_dl *sdl;
{
	char *cp = sdl->sdl_data;
	char *cplim = sdl->sdl_len + (char *)sdl;
	int byte = 0, state = NAMING, new;

	bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1);
	sdl->sdl_family = AF_LINK;
	do {
		state &= ~LETTER;
		if ((*addr >= '0') && (*addr <= '9')) {
			new = *addr - '0';
		} else if ((*addr >= 'a') && (*addr <= 'f')) {
			new = *addr - 'a' + 10;
		} else if ((*addr >= 'A') && (*addr <= 'F')) {
			new = *addr - 'A' + 10;
		} else if (*addr == 0) {
			state |= END;
		} else if (state == NAMING &&
			   (((*addr >= 'A') && (*addr <= 'Z')) ||
			   ((*addr >= 'a') && (*addr <= 'z'))))
			state |= LETTER;
		else
			state |= DELIM;
		addr++;
		switch (state /* | INPUT */) {
		case NAMING | DIGIT:
		case NAMING | LETTER:
			*cp++ = addr[-1];
			continue;
		case NAMING | DELIM:
			state = RESET;
			sdl->sdl_nlen = cp - sdl->sdl_data;
			continue;
		case GOTTWO | DIGIT:
			*cp++ = byte;
			/* FALLTHROUGH */
		case RESET | DIGIT:
			state = GOTONE;
			byte = new;
			continue;
		case GOTONE | DIGIT:
			state = GOTTWO;
			byte = new + (byte << 4);
			continue;
		default: /* | DELIM */
			state = RESET;
			*cp++ = byte;
			byte = 0;
			continue;
		case GOTONE | END:
		case GOTTWO | END:
			*cp++ = byte;
			/* FALLTHROUGH */
		case RESET | END:
			break;
		}
		break;
	} while (cp < cplim);
	sdl->sdl_alen = cp - LLADDR(sdl);
	new = cp - (char *)sdl;
	if (new > sizeof(*sdl))
		sdl->sdl_len = new;
	return;
}

static char hexlist[] = "0123456789abcdef";

char *
link_ntoa(sdl)
	const struct sockaddr_dl *sdl;
{
	static char obuf[64];
	char *out = obuf;
	int i;
	u_char *in = (u_char *)LLADDR(sdl);
	u_char *inlim = in + sdl->sdl_alen;
	int firsttime = 1;

	if (sdl->sdl_nlen) {
		bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
		out += sdl->sdl_nlen;
		if (sdl->sdl_alen)
			*out++ = ':';
	}
	while (in < inlim) {
		if (firsttime)
			firsttime = 0;
		else
			*out++ = '.';
		i = *in++;
		if (i > 0xf) {
			out[1] = hexlist[i & 0xf];
			i >>= 4;
			out[0] = hexlist[i];
			out += 2;
		} else
			*out++ = hexlist[i];
	}
	*out = 0;
	return (obuf);
}
Commit	Line	Data
9385eb3d	1	/*-
e9ce8d39 A	2	* Copyright (c) 1990, 1993
	3	* The Regents of the University of California. 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
9385eb3d A	34	#if defined(LIBC_SCCS) && !defined(lint)
	35	static char sccsid[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93";
	36	#endif /* LIBC_SCCS and not lint */
	37	#include <sys/cdefs.h>
	38	__FBSDID("$FreeBSD: src/lib/libc/net/linkaddr.c,v 1.3 2002/03/21 18:49:23 obrien Exp $");
e9ce8d39 A	39
	40	#include <sys/types.h>
	41	#include <sys/socket.h>
	42	#include <net/if_dl.h>
	43	#include <string.h>
	44
	45	/* States*/
	46	#define NAMING 0
	47	#define GOTONE 1
	48	#define GOTTWO 2
	49	#define RESET 3
	50	/* Inputs */
	51	#define DIGIT (4*0)
	52	#define END (4*1)
	53	#define DELIM (4*2)
	54	#define LETTER (4*3)
	55
	56	void
	57	link_addr(addr, sdl)
9385eb3d A	58	const char *addr;
9385eb3d A	59	struct sockaddr_dl *sdl;
e9ce8d39	60	{
9385eb3d	61	char *cp = sdl->sdl_data;
e9ce8d39	62	char cplim = sdl->sdl_len + (char )sdl;
9385eb3d	63	int byte = 0, state = NAMING, new;
e9ce8d39 A	64
	65	bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1);
	66	sdl->sdl_family = AF_LINK;
	67	do {
	68	state &= ~LETTER;
	69	if ((addr >= '0') && (addr <= '9')) {
	70	new = *addr - '0';
	71	} else if ((addr >= 'a') && (addr <= 'f')) {
	72	new = *addr - 'a' + 10;
	73	} else if ((addr >= 'A') && (addr <= 'F')) {
	74	new = *addr - 'A' + 10;
	75	} else if (*addr == 0) {
	76	state \|= END;
	77	} else if (state == NAMING &&
	78	(((addr >= 'A') && (addr <= 'Z')) \|\|
	79	((addr >= 'a') && (addr <= 'z'))))
	80	state \|= LETTER;
	81	else
	82	state \|= DELIM;
	83	addr++;
	84	switch (state /* \| INPUT */) {
	85	case NAMING \| DIGIT:
	86	case NAMING \| LETTER:
	87	*cp++ = addr[-1];
	88	continue;
	89	case NAMING \| DELIM:
	90	state = RESET;
	91	sdl->sdl_nlen = cp - sdl->sdl_data;
	92	continue;
	93	case GOTTWO \| DIGIT:
	94	*cp++ = byte;
	95	/* FALLTHROUGH */
	96	case RESET \| DIGIT:
	97	state = GOTONE;
	98	byte = new;
	99	continue;
	100	case GOTONE \| DIGIT:
	101	state = GOTTWO;
	102	byte = new + (byte << 4);
	103	continue;
	104	default: /* \| DELIM */
	105	state = RESET;
	106	*cp++ = byte;
	107	byte = 0;
	108	continue;
	109	case GOTONE \| END:
	110	case GOTTWO \| END:
	111	*cp++ = byte;
	112	/* FALLTHROUGH */
	113	case RESET \| END:
	114	break;
	115	}
	116	break;
9385eb3d	117	} while (cp < cplim);
e9ce8d39 A	118	sdl->sdl_alen = cp - LLADDR(sdl);
	119	new = cp - (char *)sdl;
	120	if (new > sizeof(*sdl))
	121	sdl->sdl_len = new;
	122	return;
	123	}
	124
	125	static char hexlist[] = "0123456789abcdef";
	126
	127	char *
	128	link_ntoa(sdl)
9385eb3d	129	const struct sockaddr_dl *sdl;
e9ce8d39 A	130	{
e9ce8d39 A	131	static char obuf[64];
9385eb3d A	132	char *out = obuf;
	133	int i;
	134	u_char in = (u_char )LLADDR(sdl);
e9ce8d39 A	135	u_char *inlim = in + sdl->sdl_alen;
	136	int firsttime = 1;
	137
	138	if (sdl->sdl_nlen) {
	139	bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
	140	out += sdl->sdl_nlen;
	141	if (sdl->sdl_alen)
	142	*out++ = ':';
	143	}
	144	while (in < inlim) {
	145	if (firsttime)
	146	firsttime = 0;
	147	else
	148	*out++ = '.';
	149	i = *in++;
	150	if (i > 0xf) {
	151	out[1] = hexlist[i & 0xf];
	152	i >>= 4;
	153	out[0] = hexlist[i];
	154	out += 2;
	155	} else
	156	*out++ = hexlist[i];
	157	}
	158	*out = 0;
	159	return (obuf);
	160	}