/*\ * 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 2 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; }