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/*\
* pcap2nbench - Converts libpcap network traces to nbench input
* Copyright (C) 2004 Jim McDonough <jmcd@us.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Written by Anthony Liguori <aliguori@us.ibm.com>
\*/
#include <netinet/in.h>
#include "tcp.hpp"
tcp::tcp(const uint8_t *data, size_t size)
{
if (size < 18) {
std::cerr << "Invalid TCP header" << std::endl;
}
memcpy(&src_port, data, 2);
src_port = ntohs(src_port);
memcpy(&dst_port, data + 2, 2);
dst_port = ntohs(dst_port);
memcpy(&seq_number, data + 4, 4);
seq_number = ntohl(seq_number);
memcpy(&ack_number, data + 8, 4);
ack_number = ntohl(ack_number);
length = ((data[12] & 0xF0) >> 4) * 4;
flags = ((data[12] & 0x0F) << 8) | data[13];
memcpy(&window_size, data + 14, 2);
window_size = ntohs(window_size);
memcpy(&checksum, data + 16, 2);
checksum = ntohs(checksum);
}
std::ostream &operator<<(std::ostream &lhs, const tcp &rhs)
{
lhs << "Source Port: " << rhs.src_port << std::endl
<< "Destination Port: " << rhs.dst_port << std::endl
<< "Sequence Number: " << rhs.seq_number << std::endl
<< "Ack Number: " << rhs.ack_number << std::endl
<< "Length: " << (uint16_t)(rhs.length) << std::endl
<< "Flags: " << rhs.flags << std::endl
<< "Window Size: " << rhs.window_size << std::endl
<< "Checksum: " << rhs.checksum << std::endl;
return lhs;
}
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