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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $Id: display_ipopt.c,v 1.2 2003/09/01 00:22:06 antirez Exp $ */
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "hping2.h"
#include "globals.h"
/* ripped from ping */
void display_ipopt(char* buf)
{
int i,j;
unsigned long l;
static int old_rrlen;
static char old_rr[MAX_IPOPTLEN];
unsigned char* cp;
int hlen;
struct myiphdr *ip;
struct in_addr in;
ip = (struct myiphdr *)buf;
hlen = ip->ihl * 4;
cp = (u_char *)buf + sizeof(struct myiphdr);
for (; hlen > (int)sizeof(struct myiphdr); --hlen, ++cp)
switch (*cp) {
case IPOPT_EOL:
hlen = 0;
break;
case IPOPT_LSRR:
(void)printf("LSRR: ");
hlen -= 2;
j = *++cp;
++cp;
if (j > IPOPT_MINOFF)
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
in.s_addr=htonl(l);
printf("\t%s",inet_ntoa(in));
hlen -= 4;
j -= 4;
if (j <= IPOPT_MINOFF)
break;
(void)putchar('\n');
}
break;
case IPOPT_RR:
j = *++cp; /* get length */
i = *++cp; /* and pointer */
hlen -= 2;
if (i > j)
i = j;
i -= IPOPT_MINOFF;
if (i <= 0)
continue;
if (i == old_rrlen
&& cp == (u_char *)buf + sizeof(struct myiphdr) + 2
&& !memcmp((char *)cp, old_rr, i)) {
(void)printf("\t(same route)\n");
i = ((i + 3) / 4) * 4;
hlen -= i;
cp += i;
break;
}
old_rrlen = i;
memcpy(old_rr, cp, i);
(void)printf("RR: ");
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
in.s_addr=htonl(l);
printf("\t%s",inet_ntoa(in));
hlen -= 4;
i -= 4;
if (i <= 0)
break;
(void)putchar('\n');
}
putchar('\n');
break;
case IPOPT_NOP:
(void)printf("NOP\n");
break;
default:
(void)printf("unknown option %x\n", *cp);
break;
}
}
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