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66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
/*\
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* pcap2nbench - Converts libpcap network traces to nbench input
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* Copyright (C) 2004 Jim McDonough <jmcd@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Written by Anthony Liguori <aliguori@us.ibm.com>
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\*/
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include "ip.hpp"
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ip::ip(const uint8_t *data, size_t length)
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{
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if (length < 20) {
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std::cerr << "Invalid ip packet" << std::endl;
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}
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version = (data[0] >> 4) & 0x0F;
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header_length = (data[0] & 0x0F) * 4;
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dsfield = data[1];
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memcpy(&total_length, data + 2, 2);
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total_length = ntohs(total_length);
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memcpy(&id, data + 4, 2);
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id = ntohs(id);
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flags = (data[6] >> 4) & 0x0F;
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fragment_offset = ((data[6] & 0x0F) << 4) | data[7];
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ttl = data[8];
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protocol = data[9];
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memcpy(&checksum, data + 10, 2);
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checksum = ntohs(checksum);
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memcpy(&source, data + 12, 4);
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memcpy(&destination, data + 16, 4);
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}
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std::ostream &operator<<(std::ostream &lhs, const ip &rhs)
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{
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lhs << "Version: " << (uint32_t)rhs.version << std::endl
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<< "Header length: " << (uint32_t)rhs.header_length << std::endl
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<< "Differentiated Services Field: " << (uint32_t)rhs.dsfield << std::endl
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<< "Total Length: " << (uint32_t)rhs.total_length << std::endl
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<< "Identification: " << (uint32_t)rhs.id << std::endl
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<< "Flags: " << (uint32_t)rhs.flags << std::endl
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<< "Fragment offset: " << (uint32_t)rhs.fragment_offset << std::endl
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<< "TTL: " << (uint32_t)rhs.ttl << std::endl
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<< "Protocol: " << (uint32_t)rhs.protocol << std::endl
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<< "Checksum: " << (uint32_t)rhs.checksum << std::endl
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<< "Source: " << inet_ntoa(*((in_addr *)&rhs.source)) << std::endl
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<< "Destination: " << inet_ntoa(*((in_addr *)&rhs.destination)) << std::endl;
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return lhs;
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}
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