| 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 |
|
|---|
| 23 | #include "tcp.hpp"
|
|---|
| 24 |
|
|---|
| 25 | tcp::tcp(const uint8_t *data, size_t size)
|
|---|
| 26 | {
|
|---|
| 27 | if (size < 18) {
|
|---|
| 28 | std::cerr << "Invalid TCP header" << std::endl;
|
|---|
| 29 | }
|
|---|
| 30 |
|
|---|
| 31 | memcpy(&src_port, data, 2);
|
|---|
| 32 | src_port = ntohs(src_port);
|
|---|
| 33 | memcpy(&dst_port, data + 2, 2);
|
|---|
| 34 | dst_port = ntohs(dst_port);
|
|---|
| 35 | memcpy(&seq_number, data + 4, 4);
|
|---|
| 36 | seq_number = ntohl(seq_number);
|
|---|
| 37 | memcpy(&ack_number, data + 8, 4);
|
|---|
| 38 | ack_number = ntohl(ack_number);
|
|---|
| 39 | length = ((data[12] & 0xF0) >> 4) * 4;
|
|---|
| 40 | flags = ((data[12] & 0x0F) << 8) | data[13];
|
|---|
| 41 | memcpy(&window_size, data + 14, 2);
|
|---|
| 42 | window_size = ntohs(window_size);
|
|---|
| 43 | memcpy(&checksum, data + 16, 2);
|
|---|
| 44 | checksum = ntohs(checksum);
|
|---|
| 45 | }
|
|---|
| 46 |
|
|---|
| 47 | std::ostream &operator<<(std::ostream &lhs, const tcp &rhs)
|
|---|
| 48 | {
|
|---|
| 49 | lhs << "Source Port: " << rhs.src_port << std::endl
|
|---|
| 50 | << "Destination Port: " << rhs.dst_port << std::endl
|
|---|
| 51 | << "Sequence Number: " << rhs.seq_number << std::endl
|
|---|
| 52 | << "Ack Number: " << rhs.ack_number << std::endl
|
|---|
| 53 | << "Length: " << (uint16_t)(rhs.length) << std::endl
|
|---|
| 54 | << "Flags: " << rhs.flags << std::endl
|
|---|
| 55 | << "Window Size: " << rhs.window_size << std::endl
|
|---|
| 56 | << "Checksum: " << rhs.checksum << std::endl;
|
|---|
| 57 |
|
|---|
| 58 | return lhs;
|
|---|
| 59 | }
|
|---|
