rtnew.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 58 行

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date	97.09.21.19.27.09;	author dls;	state Dist;
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@/* rtnew.c - rtnew */

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

/*------------------------------------------------------------------------
 *  rtnew  -  create a route structure
 *------------------------------------------------------------------------
 */
struct route *rtnew(net, mask, gw, metric, ifnum, ttl)
IPaddr	net, mask, gw;
int	metric, ifnum, ttl;
{
	struct	route *prt;

	prt = (struct route *)getbuf(Route.ri_bpool);
	if (prt == (struct route *)SYSERR) {
		IpRoutingDiscards++;
		return (struct route *)SYSERR;
	}

	prt->rt_net = net;
	prt->rt_mask = mask;
	prt->rt_gw = gw;
	prt->rt_metric = metric;
	prt->rt_ifnum = ifnum;
	prt->rt_ttl = ttl;
	prt->rt_refcnt = 1;	/* our caller */
	prt->rt_usecnt = 0;
	prt->rt_next = NULL;
	return prt;
}
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