rarp.c revision 199767f8919635c4928607450d9e0abb932109ce
/* $NetBSD: rarp.c,v 1.16 1997/07/07 15:52:52 drochner Exp $ */
/*
* 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
* 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: arp.c,v 1.5 93/07/15 05:52:26 leres Exp (LBL)
*/
__FBSDID("$FreeBSD$");
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <string.h>
#include "stand.h"
#include "net.h"
#include "netif.h"
/*
* Ethernet (Reverse) Address Resolution Protocol (see RFC 903, and 826).
*/
int
int sock;
{
struct iodesc *d;
struct {
struct {
} data;
} wbuf;
struct {
struct {
} data;
} rbuf;
#ifdef RARP_DEBUG
if (debug)
#endif
if (!(d = socktodesc(sock))) {
return (-1);
}
#ifdef RARP_DEBUG
if (debug)
#endif
if (sendrecv(d,
{
printf("No response for RARP request\n");
return (-1);
}
#if 0
/* XXX - Can NOT assume this is our root server! */
#endif
/* Compute our "natural" netmask. */
else
return (0);
}
/*
* Broadcast a RARP request (i.e. who knows who I am)
*/
static ssize_t
struct iodesc *d;
void *pkt;
{
#ifdef RARP_DEBUG
if (debug)
printf("rarpsend: called\n");
#endif
}
/*
* Returns 0 if this is the packet we're waiting for
* else -1 (and errno == 0)
*/
static ssize_t
struct iodesc *d;
void *pkt;
{
ssize_t n;
#ifdef RARP_DEBUG
if (debug)
printf("rarprecv: ");
#endif
errno = 0; /* XXX */
if (n == -1 || n < sizeof(struct ether_arp)) {
#ifdef RARP_DEBUG
if (debug)
printf("bad len=%d\n", n);
#endif
return (-1);
}
if (etype != ETHERTYPE_REVARP) {
#ifdef RARP_DEBUG
if (debug)
#endif
return (-1);
}
{
#ifdef RARP_DEBUG
if (debug)
#endif
return (-1);
}
#ifdef RARP_DEBUG
if (debug)
#endif
return (-1);
}
/* Is the reply for our Ethernet address? */
#ifdef RARP_DEBUG
if (debug)
printf("unwanted address\n");
#endif
return (-1);
}
/* We have our answer. */
#ifdef RARP_DEBUG
if (debug)
printf("got it\n");
#endif
return (n);
}