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