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/* rarp_in.c - rarp_in */

#include <conf.h>
#include <kernel.h>
#include <proc.h>
#include <network.h>

/*------------------------------------------------------------------------
 *  rarp_in  -  handle RARP packet coming in from Ethernet network
 *------------------------------------------------------------------------
 */
rarp_in(packet, device)
struct	epacket	*packet;
int	device;
{
	PStype	ps;
	int	pid;
	int	ret;
	struct	arppak	*apacptr;
	struct	etblk	*etptr;

	apacptr = (struct arppak *) packet->ep_data;
	if ((net2hs(apacptr->ar_op)&LOW16) == AR_RRLY) {
		etptr = (struct etblk *)devtab[device].dvioblk;
		if ( blkequ(apacptr->ar_tha,etptr->etpaddr,EPADLEN) ) {
			blkcopy(Net.myaddr, apacptr->ar_tpa, IPLEN);
			netnum(Net.mynet, Net.myaddr);
			disable(ps);
			Net.mavalid = TRUE;
			pid = Arp.rarppid;
			if (!isbadpid(pid)) {
				Arp.rarppid = BADPID;
				send(pid, OK);
			}
			restore(ps);
		}
		ret = OK;
	} else
		ret = SYSERR;
	freebuf(packet);
	return(ret);
}

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