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