/*
* Copyright (c) 1992 Regents of the University of California.
* All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory 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.
*
* @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
*/
/* Caller must leave room for ethernet header in front!! */
ssize_t
sendether(struct iodesc *d, void *pkt, size_t len, u_char *dea, int etype)
{
ssize_t n;
struct ether_header *eh;
#ifdef ETHER_DEBUG
if (debug)
printf("%s: called\n", __func__);
#endif
eh = (struct ether_header *)pkt - 1;
len += sizeof(*eh);
MACPY(d->myea, eh->ether_shost); /* by byte */
MACPY(dea, eh->ether_dhost); /* by byte */
eh->ether_type = htons(etype);
n = netif_put(d, eh, len);
if (n == -1 || (size_t)n < sizeof(*eh))
return -1;
n -= (ssize_t)sizeof(*eh);
return n;
}
/*
* Get a packet of any Ethernet type, with our address or
* the broadcast address. Save the Ether type in arg 5.
* NOTE: Caller must leave room for the Ether header.
*/
ssize_t
readether(struct iodesc *d, void *pkt, size_t len, saseconds_t tleft,
u_int16_t *etype)
{
ssize_t n;
struct ether_header *eh;
#ifdef ETHER_DEBUG
if (debug)
printf("%s: called\n", __func__);
#endif
eh = (struct ether_header *)pkt - 1;
len += sizeof(*eh);
n = netif_get(d, eh, len, tleft);
if (n == -1 || (size_t)n < sizeof(*eh))
return -1;
