159 lines
4.3 KiB
C
159 lines
4.3 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if_dl.h>
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#include <string.h>
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/* States*/
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#define NAMING 0
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#define GOTONE 1
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#define GOTTWO 2
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#define RESET 3
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/* Inputs */
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#define DIGIT (4*0)
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#define END (4*1)
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#define DELIM (4*2)
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#define LETTER (4*3)
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void
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link_addr(addr, sdl)
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register const char *addr;
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register struct sockaddr_dl *sdl;
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{
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register char *cp = sdl->sdl_data;
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char *cplim = sdl->sdl_len + (char *)sdl;
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register int byte = 0, state = NAMING, new;
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bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1);
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sdl->sdl_family = AF_LINK;
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do {
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state &= ~LETTER;
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if ((*addr >= '0') && (*addr <= '9')) {
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new = *addr - '0';
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} else if ((*addr >= 'a') && (*addr <= 'f')) {
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new = *addr - 'a' + 10;
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} else if ((*addr >= 'A') && (*addr <= 'F')) {
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new = *addr - 'A' + 10;
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} else if (*addr == 0) {
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state |= END;
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} else if (state == NAMING &&
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(((*addr >= 'A') && (*addr <= 'Z')) ||
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((*addr >= 'a') && (*addr <= 'z'))))
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state |= LETTER;
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else
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state |= DELIM;
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addr++;
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switch (state /* | INPUT */) {
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case NAMING | DIGIT:
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case NAMING | LETTER:
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*cp++ = addr[-1];
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continue;
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case NAMING | DELIM:
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state = RESET;
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sdl->sdl_nlen = cp - sdl->sdl_data;
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continue;
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case GOTTWO | DIGIT:
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*cp++ = byte;
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/* FALLTHROUGH */
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case RESET | DIGIT:
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state = GOTONE;
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byte = new;
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continue;
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case GOTONE | DIGIT:
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state = GOTTWO;
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byte = new + (byte << 4);
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continue;
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default: /* | DELIM */
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state = RESET;
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*cp++ = byte;
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byte = 0;
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continue;
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case GOTONE | END:
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case GOTTWO | END:
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*cp++ = byte;
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/* FALLTHROUGH */
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case RESET | END:
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break;
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}
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break;
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} while (cp < cplim);
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sdl->sdl_alen = cp - LLADDR(sdl);
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new = cp - (char *)sdl;
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if (new > sizeof(*sdl))
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sdl->sdl_len = new;
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return;
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}
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static char hexlist[] = "0123456789abcdef";
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char *
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link_ntoa(sdl)
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register const struct sockaddr_dl *sdl;
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{
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static char obuf[64];
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register char *out = obuf;
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register int i;
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register u_char *in = (u_char *)LLADDR(sdl);
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u_char *inlim = in + sdl->sdl_alen;
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int firsttime = 1;
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if (sdl->sdl_nlen) {
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bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
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out += sdl->sdl_nlen;
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if (sdl->sdl_alen)
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*out++ = ':';
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}
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while (in < inlim) {
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if (firsttime)
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firsttime = 0;
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else
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*out++ = '.';
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i = *in++;
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if (i > 0xf) {
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out[1] = hexlist[i & 0xf];
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i >>= 4;
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out[0] = hexlist[i];
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out += 2;
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} else
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*out++ = hexlist[i];
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}
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*out = 0;
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return (obuf);
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}
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