nb_switch.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 107 行

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date	97.09.21.19.28.38;	author dls;	state Dist;
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date	94.02.13.19.38.53;	author dls;	state Works;
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1.1
date	94.02.06.18.20.37;	author dls;	state Ok;
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@pre-3e code
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@/* nb_switch.c - nb_switch */

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

/*------------------------------------------------------------------------
 *  nb_switch - handle neighbor state changes on HELLO packet input
 *------------------------------------------------------------------------
 */
int nb_switch(pif, pnb, pep)
struct	ospf_if	*pif;
struct	ospf_nb	*pnb;
struct	ep	*pep;
{
	struct ip		*pip;
	struct ospf		*po;
	struct ospf_hello	*poh;
	Bool			found = FALSE;
	int			nn, maxn;

	pip = (struct ip *)pep->ep_data;
	po = (struct ospf *)((char *)pip + IP_HLEN(pip));
	poh = (struct ospf_hello *)po->ospf_data;

	maxn = (po->ospf_len - MINHELLOLEN) / sizeof(long);
	for (nn=0; nn<maxn; ++nn)
		if (found = (pif->if_rid == poh->oh_neighbor[nn]))
			break;
	if (!found) {
		if (pnb->nb_state >= NBS_2WAY) {
			pnb->nb_state = NBS_INIT;
			nb_clearl(pnb);
		}
		return 0;
	} else if (pnb->nb_state == NBS_INIT) {
		pnb->nb_state = NBS_2WAY;
		if (nb_aok(pif, pnb)) {
			gettime(&pnb->nb_seq);	/* set initial seq */
			pnb->nb_state = NBS_EXSTART;
			nb_makel(pnb);
			dd_queue(pif, pnb);
		}
	}
	return 1;
}
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@Initial revision
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@d34 1
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/* clear LS rexmt, DB summary & LS req lists here */
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			dd_send(pif, pnb);
		} else
			pnb->nb_state = NBS_2WAY;
@