75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
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/*
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* $smu-mark$
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* $name: sendip_handler.c$
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* $author: Salvatore Sanfilippo <antirez@invece.org>$
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* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:49 MET 1999$
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* $rev: 3$
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*/
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#include <stdio.h>
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#include "hping2.h"
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#include "globals.h"
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void send_ip_handler(char *packet, unsigned int size)
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{
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if(opt_ipv6)
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{
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send_ip6((char*)&ADDR6(&local),
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(char*)&ADDR6(&remote),
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packet, size);
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return;
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}
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ip_optlen = ip_opt_build(ip_opt);
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if (!opt_fragment && (size+ip_optlen+20 >= h_if_mtu))
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{
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/* auto-activate fragmentation */
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virtual_mtu = h_if_mtu-20;
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virtual_mtu = virtual_mtu - (virtual_mtu % 8);
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opt_fragment = TRUE;
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opt_mf = opt_df = FALSE; /* deactivate incompatible options */
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if (opt_verbose || opt_debug)
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printf("auto-activate fragmentation, fragments size: %d\n", virtual_mtu);
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}
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if (!opt_fragment)
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{
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unsigned short fragment_flag = 0;
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if (opt_mf) fragment_flag |= MF; /* more fragments */
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if (opt_df) fragment_flag |= DF; /* dont fragment */
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send_ip((char*)&ADDR4(&local),
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(char*)&ADDR4(&remote),
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packet, size, fragment_flag, ip_frag_offset,
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ip_opt, ip_optlen);
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}
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else
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{
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unsigned int remainder = size;
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int frag_offset = 0;
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while(1) {
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if (remainder <= virtual_mtu)
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break;
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send_ip((char*)&ADDR4(&local),
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(char*)&ADDR4(&remote),
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packet+frag_offset,
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virtual_mtu, MF, frag_offset,
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ip_opt, ip_optlen);
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remainder-=virtual_mtu;
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frag_offset+=virtual_mtu;
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}
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send_ip((char*)&ADDR4(&local),
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(char*)&ADDR4(&remote),
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packet+frag_offset,
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remainder, NF, frag_offset,
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ip_opt, ip_optlen);
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}
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}
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