/*\ * 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, see <http://www.gnu.org/licenses/>. * * Written by Anthony Liguori <aliguori@us.ibm.com> \*/ #include <netinet/in.h> #include <sys/socket.h> #include <arpa/inet.h> #include "ip.hpp" ip::ip(const uint8_t *data, size_t length) { if (length < 20) { std::cerr << "Invalid ip packet" << std::endl; } version = (data[0] >> 4) & 0x0F; header_length = (data[0] & 0x0F) * 4; dsfield = data[1]; memcpy(&total_length, data + 2, 2); total_length = ntohs(total_length); memcpy(&id, data + 4, 2); id = ntohs(id); flags = (data[6] >> 4) & 0x0F; fragment_offset = ((data[6] & 0x0F) << 4) | data[7]; ttl = data[8]; protocol = data[9]; memcpy(&checksum, data + 10, 2); checksum = ntohs(checksum); memcpy(&source, data + 12, 4); memcpy(&destination, data + 16, 4); } std::ostream &operator<<(std::ostream &lhs, const ip &rhs) { lhs << "Version: " << (uint32_t)rhs.version << std::endl << "Header length: " << (uint32_t)rhs.header_length << std::endl << "Differentiated Services Field: " << (uint32_t)rhs.dsfield << std::endl << "Total Length: " << (uint32_t)rhs.total_length << std::endl << "Identification: " << (uint32_t)rhs.id << std::endl << "Flags: " << (uint32_t)rhs.flags << std::endl << "Fragment offset: " << (uint32_t)rhs.fragment_offset << std::endl << "TTL: " << (uint32_t)rhs.ttl << std::endl << "Protocol: " << (uint32_t)rhs.protocol << std::endl << "Checksum: " << (uint32_t)rhs.checksum << std::endl << "Source: " << inet_ntoa(*((in_addr *)&rhs.source)) << std::endl << "Destination: " << inet_ntoa(*((in_addr *)&rhs.destination)) << std::endl; return lhs; }