route.c

一个基于linux的TCP/IP协议栈的实现

/* route.c
 * [e-mail]
 * 2006-10-13
 */


#include "route.h"
#include "af_inet.h"

static void myipv4_link_failure(struct sk_buff *skb)
{
	struct rtable *rt;

	//icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);

	rt = (struct rtable *) skb->dst;
	if( rt )
		dst_set_expires( &rt->u.dst, 0 );
}

struct dst_ops myipv4_dst_ops = {
	.family =		MY_AF_INET,
	.protocol =		__constant_htons(ETH_P_IP),
	//.gc =			rt_garbage_collect,
	//.check =		ipv4_dst_check,
	//.destroy =		ipv4_dst_destroy,
	//.ifdown =		ipv4_dst_ifdown,
	//.negative_advice =	ipv4_negative_advice,
	.link_failure =		myipv4_link_failure,
	//.update_pmtu =		ip_rt_update_pmtu,
	.entry_size =		sizeof(struct rtable),
};

EXPORT_SYMBOL_GPL( myipv4_dst_ops );