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#include <sys/socket.h> 23#include <arpa/inet.h> 24#include "ip.hpp" 25 26ip::ip(const uint8_t *data, size_t length) 27{ 28 if (length < 20) { 29 std::cerr << "Invalid ip packet" << std::endl; 30 } 31 32 version = (data[0] >> 4) & 0x0F; 33 header_length = (data[0] & 0x0F) * 4; 34 dsfield = data[1]; 35 memcpy(&total_length, data + 2, 2); 36 total_length = ntohs(total_length); 37 memcpy(&id, data + 4, 2); 38 id = ntohs(id); 39 flags = (data[6] >> 4) & 0x0F; 40 fragment_offset = ((data[6] & 0x0F) << 4) | data[7]; 41 ttl = data[8]; 42 protocol = data[9]; 43 memcpy(&checksum, data + 10, 2); 44 checksum = ntohs(checksum); 45 memcpy(&source, data + 12, 4); 46 memcpy(&destination, data + 16, 4); 47} 48 49std::ostream &operator<<(std::ostream &lhs, const ip &rhs) 50{ 51 lhs << "Version: " << (uint32_t)rhs.version << std::endl 52 << "Header length: " << (uint32_t)rhs.header_length << std::endl 53 << "Differentiated Services Field: " << (uint32_t)rhs.dsfield << std::endl 54 << "Total Length: " << (uint32_t)rhs.total_length << std::endl 55 << "Identification: " << (uint32_t)rhs.id << std::endl 56 << "Flags: " << (uint32_t)rhs.flags << std::endl 57 << "Fragment offset: " << (uint32_t)rhs.fragment_offset << std::endl 58 << "TTL: " << (uint32_t)rhs.ttl << std::endl 59 << "Protocol: " << (uint32_t)rhs.protocol << std::endl 60 << "Checksum: " << (uint32_t)rhs.checksum << std::endl 61 << "Source: " << inet_ntoa(*((in_addr *)&rhs.source)) << std::endl 62 << "Destination: " << inet_ntoa(*((in_addr *)&rhs.destination)) << std::endl; 63 64 return lhs; 65} 66