rarp_in.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 105 行

head	1.2;
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1.2
date	97.09.21.19.27.59;	author dls;	state Dist;
branches;
next	1.1;

1.1
date	94.06.01.16.00.56;	author dls;	state Old;
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1.2
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@pre-3e code
@
text
@/* 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
 *------------------------------------------------------------------------
 */
int rarp_in(pni, packet)
struct	netif	*pni;
struct	ep	*packet;
{
	STATWORD	ps;
	int		pid, ret;
	int		device = pni->ni_dev;
	struct	arp	*parp;
	struct	utdev	*pud;

	parp = (struct arp *) packet->ep_data;
	parp->ar_op = net2hs(parp->ar_op);
	parp->ar_hwtype = net2hs(parp->ar_hwtype);
	parp->ar_prtype = net2hs(parp->ar_prtype);

	if (parp->ar_op == RA_REPLY) {
		pud = (struct utdev *)devtab[device].dvioblk;
		if (blkequ(THA(parp), pud->ud_paddr, EP_ALEN)) {
			IPaddr mask;

			blkcopy(&pni->ni_ip, TPA(parp), IP_ALEN);
			pni->ni_net = netnum(pni->ni_ip);
			pni->ni_ivalid = TRUE;
			mask = netmask(pni->ni_ip);
			setmask(pud->ud_ifnum, mask);
			disable(ps);
			pid = rarppid;
			if (!isbadpid(pid)) {
				rarppid = BADPID;
				send(pid, OK);
			}
			restore(ps);
		}
		ret = OK;
	} else
		ret = SYSERR;
	freebuf(packet);
	return ret;
}
@


1.1
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@Initial revision
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@d20 1
a20 1
	struct	etblk	*etptr;
d28 2
a29 2
		etptr = (struct etblk *)devtab[device].dvioblk;
		if (blkequ(THA(parp), etptr->etpaddr, EP_ALEN)) {
a30 1
			int i;
d32 2
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			blkcopy(pni->ni_ip, TPA(parp), IP_ALEN);
			netnum(pni->ni_net, pni->ni_ip);
d35 2
a36 2
			netmask(mask, pni->ni_ip);
			setmask(etptr->etintf, mask);
@