dump_arptab.c

一款类linux的操作系统源码

/*
 *  Roadrunner/pk
 *    Copyright (C) 1989-2001  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 <stdio.h>
#include <string.h>
#include <sys/intr.h>
#include <fs/dump.h>

#define ARP_HDR "ipaddr           hwaddr             state     ttl"

void
dump_arptab(char *s)
{
    arpentry_t ae;
    char s1[32];
    int arpcnt = 0, i, j, len;

    disable;

    for (i = 0; i < ARP_ENTRIES; i++)
	if (arptab[i].state != ARP_ENTRY_FREE) {
	    if (arpcnt++ == 0) {
		sprintf(s, "%s\n", ARP_HDR);
		s += strlen(ARP_HDR) + 1;
	    }
	    ae = &(arptab[i]);

	    ip2str(ae->ip, s1);
	    sprintf(s, s1);
	    len = strlen(s1);
	    s += len;
	    for (j = 0; j < 17 - len; j++)
		sprintf(s++, " ");

	    if (ae->state == ARP_ENTRY_PENDING)
		sprintf(s, "-                ");
	    else
		ether2str(ae->hwaddr, s);
	    s += 17;

	    sprintf(s, "  ");
	    s += 2;

	    if (ae->state == ARP_ENTRY_PENDING)
		sprintf(s, "pending   ");
	    else if (ae->state == ARP_ENTRY_RESOLVED)
		sprintf(s, "resolved  ");
	    else
		sprintf(s, "ERROR     ");
	    s += 10;

	    if (ae->ttl == ARP_TTL_INFINITE) {
		sprintf(s, "permanent\n");
		s += 10;
	    } else {
		sprintf(s1, "%d\n", ae->ttl);
		sprintf(s, s1);
		s += strlen(s1);
	    }
	}

    enable;
}