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ether.c revision 1.2 
      1 /*	$NetBSD: ether.c,v 1.2 1994/10/26 05:44:43 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992 Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Lawrence Berkeley Laboratory and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp  (LBL)
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/socket.h>
     44 #include <string.h>
     45 
     46 #include <net/if.h>
     47 
     48 #include <netinet/in.h>
     49 #include <netinet/if_ether.h>
     50 #include <netinet/in_systm.h>
     51 #include <netinet/ip.h>
     52 
     53 #include "stand.h"
     54 #include "net.h"
     55 #include "netif.h"
     56 
     57 const u_char bcea[6] = {
     58 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff
     59 };
     60 
     61 /* Caller must leave room for ethernet header in front!! */
     62 int
     63 sendether(d, buf, len, dea, etype)
     64 	struct iodesc *d;
     65 	void *buf;
     66 	int len;
     67 	u_char *dea;
     68 	int etype;
     69 {
     70 	register struct ether_header *eh;
     71 
     72 #ifdef ETHER_DEBUG
     73  	if (debug)
     74 		printf("sendether: called\n");
     75 #endif
     76 	eh = ((struct ether_header *)buf) - 1;
     77 	len += ETHER_SIZE;
     78 
     79 	MACPY(d->myea, eh->ether_shost);		/* by byte */
     80 	MACPY(dea, eh->ether_dhost);			/* by byte */
     81 	eh->ether_type = htons(etype);
     82 	return (netif_put(d, eh, len) - ETHER_SIZE);
     83 }
     84 
     85 /*
     86  * Convert Ethernet address to printable (loggable) representation.
     87  */
     88 static char digits[] = "0123456789abcdef";
     89 char *
     90 ether_sprintf(ap)
     91         register u_char *ap;
     92 {
     93 	register i;
     94 	static char etherbuf[18];
     95 	register char *cp = etherbuf;
     96 
     97 	for (i = 0; i < 6; i++) {
     98 		*cp++ = digits[*ap >> 4];
     99 		*cp++ = digits[*ap++ & 0xf];
    100 		*cp++ = ':';
    101 	}
    102 	*--cp = 0;
    103 	return (etherbuf);
    104 }
    105