135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"@(#) $Header: print-arp.c,v 1.43 97/06/15 13:20:27 leres Exp $ (LBL)";
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
|
|
#if __STDC__
|
|
struct mbuf;
|
|
struct rtentry;
|
|
#endif
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/if_ether.h>
|
|
|
|
#ifdef HAVE_MEMORY_H
|
|
#include <memory.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "ethertype.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
/* Compatibility */
|
|
#ifndef REVARP_REQUEST
|
|
#define REVARP_REQUEST 3
|
|
#endif
|
|
#ifndef REVARP_REPLY
|
|
#define REVARP_REPLY 4
|
|
#endif
|
|
|
|
static u_char ezero[6];
|
|
|
|
void
|
|
arp_print(register const u_char *bp, u_int length, u_int caplen)
|
|
{
|
|
register const struct ether_arp *ap;
|
|
register const struct ether_header *eh;
|
|
register u_short pro, hrd, op;
|
|
|
|
ap = (struct ether_arp *)bp;
|
|
if ((u_char *)(ap + 1) > snapend) {
|
|
printf("[|arp]");
|
|
return;
|
|
}
|
|
if (length < sizeof(struct ether_arp)) {
|
|
(void)printf("truncated-arp");
|
|
default_print((u_char *)ap, length);
|
|
return;
|
|
}
|
|
|
|
pro = EXTRACT_16BITS(&ap->arp_pro);
|
|
hrd = EXTRACT_16BITS(&ap->arp_hrd);
|
|
op = EXTRACT_16BITS(&ap->arp_op);
|
|
|
|
if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
|
|
|| ap->arp_hln != sizeof(SHA(ap))
|
|
|| ap->arp_pln != sizeof(SPA(ap))) {
|
|
(void)printf("arp-#%d for proto #%d (%d) hardware #%d (%d)",
|
|
op, pro, ap->arp_pln,
|
|
hrd, ap->arp_hln);
|
|
return;
|
|
}
|
|
if (pro == ETHERTYPE_TRAIL)
|
|
(void)printf("trailer-");
|
|
eh = (struct ether_header *)packetp;
|
|
switch (op) {
|
|
|
|
case ARPOP_REQUEST:
|
|
(void)printf("arp who-has %s", ipaddr_string(TPA(ap)));
|
|
if (memcmp((char *)ezero, (char *)THA(ap), 6) != 0)
|
|
(void)printf(" (%s)", etheraddr_string(THA(ap)));
|
|
(void)printf(" tell %s", ipaddr_string(SPA(ap)));
|
|
if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
|
|
(void)printf(" (%s)", etheraddr_string(SHA(ap)));
|
|
break;
|
|
|
|
case ARPOP_REPLY:
|
|
(void)printf("arp reply %s", ipaddr_string(SPA(ap)));
|
|
if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
|
|
(void)printf(" (%s)", etheraddr_string(SHA(ap)));
|
|
(void)printf(" is-at %s", etheraddr_string(SHA(ap)));
|
|
if (memcmp((char *)EDST(eh), (char *)THA(ap), 6) != 0)
|
|
(void)printf(" (%s)", etheraddr_string(THA(ap)));
|
|
break;
|
|
|
|
case REVARP_REQUEST:
|
|
(void)printf("rarp who-is %s tell %s",
|
|
etheraddr_string(THA(ap)),
|
|
etheraddr_string(SHA(ap)));
|
|
break;
|
|
|
|
case REVARP_REPLY:
|
|
(void)printf("rarp reply %s at %s",
|
|
etheraddr_string(THA(ap)),
|
|
ipaddr_string(TPA(ap)));
|
|
break;
|
|
|
|
default:
|
|
(void)printf("arp-#%d", op);
|
|
default_print((u_char *)ap, caplen);
|
|
return;
|
|
}
|
|
if (hrd != ARPHRD_ETHER)
|
|
printf(" hardware #%d", hrd);
|
|
}
|