netif_input.c

来自「一款类linux的操作系统源码」· C语言 代码 · 共 55 行

/*
 *  Roadrunner/pk
 *    Copyright (C) 1989-2002  Cornfed Systems, Inc.
 *
 *  The Roadrunner/pk operating system is free software; you can
 *  redistribute and/or modify it under the terms of the GNU General
 *  Public License, version 2, as published by the Free Software
 *  Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA 02111-1307 USA
 *
 *  More information about the Roadrunner/pk operating system of
 *  which this file is a part is available on the World-Wide Web
 *  at: http://www.cornfed.com.
 *
 */

#include <net/arp.h>
#include <net/ether.h>
#include <net/ip.h>
#include <net/netif.h>
#if _DEBUG_NETIF
#include <stdio.h>
#endif

void
netif_input(buf_t b)
{
    etherhdr_t eh = (etherhdr_t) bstart(b);

    switch (NET2HS(eh->type)) {
    case ETHER_TYPE_IP:
	ip_input(b);
	break;

    case ETHER_TYPE_ARP:
	arp_input(b);
	break;

    default:
#if _DEBUG_NETIF
	kprintf("netif_input: unknown packet (%04x)\n", NET2HS(eh->type));
#endif
	brel(b);
    }
}