kc3-lang/libbsd/src/linkaddr.c

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• Hash : f5b83170
  Author :
  Date : 2008-03-16T14:30:51
  

  Remove UC Berkeley advertising clause As per <ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>.

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• src/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.
   * 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);
  }
  

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