1/*\ 2 * pcap2nbench - Converts libpcap network traces to nbench input 3 * Copyright (C) 2004 Jim McDonough <jmcd@us.ibm.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 3 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <http://www.gnu.org/licenses/>. 17 * 18 * Written by Anthony Liguori <aliguori@us.ibm.com> 19\*/ 20 21#include <netinet/in.h> 22 23#include "tcp.hpp" 24 25tcp::tcp(const uint8_t *data, size_t size) 26{ 27 if (size < 18) { 28 std::cerr << "Invalid TCP header" << std::endl; 29 } 30 31 memcpy(&src_port, data, 2); 32 src_port = ntohs(src_port); 33 memcpy(&dst_port, data + 2, 2); 34 dst_port = ntohs(dst_port); 35 memcpy(&seq_number, data + 4, 4); 36 seq_number = ntohl(seq_number); 37 memcpy(&ack_number, data + 8, 4); 38 ack_number = ntohl(ack_number); 39 length = ((data[12] & 0xF0) >> 4) * 4; 40 flags = ((data[12] & 0x0F) << 8) | data[13]; 41 memcpy(&window_size, data + 14, 2); 42 window_size = ntohs(window_size); 43 memcpy(&checksum, data + 16, 2); 44 checksum = ntohs(checksum); 45} 46 47std::ostream &operator<<(std::ostream &lhs, const tcp &rhs) 48{ 49 lhs << "Source Port: " << rhs.src_port << std::endl 50 << "Destination Port: " << rhs.dst_port << std::endl 51 << "Sequence Number: " << rhs.seq_number << std::endl 52 << "Ack Number: " << rhs.ack_number << std::endl 53 << "Length: " << (uint16_t)(rhs.length) << std::endl 54 << "Flags: " << rhs.flags << std::endl 55 << "Window Size: " << rhs.window_size << std::endl 56 << "Checksum: " << rhs.checksum << std::endl; 57 58 return lhs; 59} 60