| 1 | /*\
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| 2 | * pcap2nbench - Converts libpcap network traces to nbench input
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| 3 | * Copyright (C) 2004 Jim McDonough <jmcd@us.ibm.com>
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 | *
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| 19 | * Written by Anthony Liguori <aliguori@us.ibm.com>
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| 20 | \*/
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| 21 |
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| 22 | #include <netinet/in.h>
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| 23 |
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| 24 | #include "tcp.hpp"
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| 25 |
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| 26 | tcp::tcp(const uint8_t *data, size_t size)
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| 27 | {
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| 28 | if (size < 18) {
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| 29 | std::cerr << "Invalid TCP header" << std::endl;
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| 30 | }
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| 31 |
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| 32 | memcpy(&src_port, data, 2);
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| 33 | src_port = ntohs(src_port);
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| 34 | memcpy(&dst_port, data + 2, 2);
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| 35 | dst_port = ntohs(dst_port);
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| 36 | memcpy(&seq_number, data + 4, 4);
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| 37 | seq_number = ntohl(seq_number);
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| 38 | memcpy(&ack_number, data + 8, 4);
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| 39 | ack_number = ntohl(ack_number);
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| 40 | length = ((data[12] & 0xF0) >> 4) * 4;
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| 41 | flags = ((data[12] & 0x0F) << 8) | data[13];
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| 42 | memcpy(&window_size, data + 14, 2);
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| 43 | window_size = ntohs(window_size);
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| 44 | memcpy(&checksum, data + 16, 2);
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| 45 | checksum = ntohs(checksum);
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| 46 | }
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| 47 |
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| 48 | std::ostream &operator<<(std::ostream &lhs, const tcp &rhs)
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| 49 | {
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| 50 | lhs << "Source Port: " << rhs.src_port << std::endl
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| 51 | << "Destination Port: " << rhs.dst_port << std::endl
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| 52 | << "Sequence Number: " << rhs.seq_number << std::endl
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| 53 | << "Ack Number: " << rhs.ack_number << std::endl
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| 54 | << "Length: " << (uint16_t)(rhs.length) << std::endl
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| 55 | << "Flags: " << rhs.flags << std::endl
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| 56 | << "Window Size: " << rhs.window_size << std::endl
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| 57 | << "Checksum: " << rhs.checksum << std::endl;
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| 58 |
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| 59 | return lhs;
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| 60 | }
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