2
* pcap2nbench - Converts libpcap network traces to nbench input
3
* Copyright (C) 2004 Jim McDonough <jmcd@us.ibm.com>
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.
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.
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/>.
18
* Written by Anthony Liguori <aliguori@us.ibm.com>
21
#include <netinet/in.h>
22
#include <sys/socket.h>
23
#include <arpa/inet.h>
26
ip::ip(const uint8_t *data, size_t length)
29
std::cerr << "Invalid ip packet" << std::endl;
32
version = (data[0] >> 4) & 0x0F;
33
header_length = (data[0] & 0x0F) * 4;
35
memcpy(&total_length, data + 2, 2);
36
total_length = ntohs(total_length);
37
memcpy(&id, data + 4, 2);
39
flags = (data[6] >> 4) & 0x0F;
40
fragment_offset = ((data[6] & 0x0F) << 4) | data[7];
43
memcpy(&checksum, data + 10, 2);
44
checksum = ntohs(checksum);
45
memcpy(&source, data + 12, 4);
46
memcpy(&destination, data + 16, 4);
49
std::ostream &operator<<(std::ostream &lhs, const ip &rhs)
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;