lsr_xmit.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 71 行

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date	97.09.21.19.28.38;	author dls;	state Dist;
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@pre-3e code
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@/* lsr_xmit.c - lsa_xmit */

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

/*------------------------------------------------------------------------
 *  lsr_xmit - transmit pending Link State Request packets
 *------------------------------------------------------------------------
 */
int lsr_xmit(pif, pnb)
struct ospf_if	*pif;
struct ospf_nb	*pnb;
{
	struct	ep	*pephead, *pep;
	struct	ip	*pip;
	struct	ospf	*po;
	int		len;

	pephead = (struct ep *)headq(pnb->nb_lsrl);
	if (pephead == 0)
		return OK;
	pep = (struct ep *)getbuf(Net.netpool);
	if ((int)pep == SYSERR)
		return SYSERR;
	/* make a copy */
	pip = (struct ip *)pephead->ep_data;
	po = (struct ospf *)pip->ip_data;
	len = EP_HLEN + IPMHLEN + po->ospf_len;
	blkcopy(pep, pephead, len);
	pip = (struct ip *)pep->ep_data;
	po = (struct ospf *)pip->ip_data;
	po->ospf_authtype = hs2net(pif->if_area->ar_authtype);
	bzero(po->ospf_auth, AUTHLEN);
	len = po->ospf_len;
	po->ospf_len = hs2net(po->ospf_len);
	pep->ep_order &= ~EPO_OSPF;
	po->ospf_cksum = 0;
	po->ospf_cksum = cksum(po, len);
	blkcopy(po->ospf_auth, pif->if_area->ar_auth, AUTHLEN);
	pip->ip_src = ip_anyaddr;
	ipsend(pnb->nb_ipa, pep, len, IPT_OSPF, IPP_INCTL, IP_TTL);
	pnb->nb_tlsr = pif->if_rintv;
	return OK;
}
@