84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
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/*
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* $smu-mark$
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* $name: memunlock.c$
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* $other_author: Mika <mika@qualys.com>
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* $other_copyright: Copyright (C) 1999 Mika <mika@qualys.com>
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:48 MET 1999$
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* $rev: 2$
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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 <netinet/in.h>
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#include <sys/socket.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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unsigned char ip_opt_build(char* ip_opt)
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{
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unsigned char optlen = 0;
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unsigned long ip;
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memset(ip_opt, 1, sizeof(ip_opt));
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if (opt_lsrr)
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{
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if (lsr_length<=39)
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{
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memcpy(ip_opt, &lsr, lsr_length);
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optlen += lsr_length;
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}
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else
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{
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printf("Warning: loose source route is too long, discarding it");
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opt_lsrr=0;
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}
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}
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if (opt_ssrr)
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{
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if (ssr_length+optlen<=39)
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{
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memcpy(ip_opt + optlen, &ssr, ssr_length);
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optlen += ssr_length;
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}
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else
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{
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printf("Warning: strict source route is too long, discarding it");
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opt_ssrr=0;
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}
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}
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if (opt_rroute)
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{
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if (optlen<=33)
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{
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ip_opt[optlen]=IPOPT_RR;
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ip_opt[optlen+1]=39-optlen;
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ip_opt[optlen+2]=8;
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ip=inet_addr("1.2.3.4");
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memcpy(ip_opt+optlen+3,&ip,4);
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optlen=39;
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}
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else
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{
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printf("Warning: no room for record route, discarding option\n");
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opt_rroute=0;
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}
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}
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if (optlen)
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{
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optlen = (optlen + 3) & ~3;
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ip_opt[optlen-1] = 0;
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return optlen;
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}
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else
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return 0;
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}
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