From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- examples/pcap2nbench/tcp.cpp | 59 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 examples/pcap2nbench/tcp.cpp (limited to 'examples/pcap2nbench/tcp.cpp') diff --git a/examples/pcap2nbench/tcp.cpp b/examples/pcap2nbench/tcp.cpp new file mode 100644 index 0000000..8b51060 --- /dev/null +++ b/examples/pcap2nbench/tcp.cpp @@ -0,0 +1,59 @@ +/*\ + * pcap2nbench - Converts libpcap network traces to nbench input + * Copyright (C) 2004 Jim McDonough + * + * 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 . + * + * Written by Anthony Liguori +\*/ + +#include + +#include "tcp.hpp" + +tcp::tcp(const uint8_t *data, size_t size) +{ + if (size < 18) { + std::cerr << "Invalid TCP header" << std::endl; + } + + memcpy(&src_port, data, 2); + src_port = ntohs(src_port); + memcpy(&dst_port, data + 2, 2); + dst_port = ntohs(dst_port); + memcpy(&seq_number, data + 4, 4); + seq_number = ntohl(seq_number); + memcpy(&ack_number, data + 8, 4); + ack_number = ntohl(ack_number); + length = ((data[12] & 0xF0) >> 4) * 4; + flags = ((data[12] & 0x0F) << 8) | data[13]; + memcpy(&window_size, data + 14, 2); + window_size = ntohs(window_size); + memcpy(&checksum, data + 16, 2); + checksum = ntohs(checksum); +} + +std::ostream &operator<<(std::ostream &lhs, const tcp &rhs) +{ + lhs << "Source Port: " << rhs.src_port << std::endl + << "Destination Port: " << rhs.dst_port << std::endl + << "Sequence Number: " << rhs.seq_number << std::endl + << "Ack Number: " << rhs.ack_number << std::endl + << "Length: " << (uint16_t)(rhs.length) << std::endl + << "Flags: " << rhs.flags << std::endl + << "Window Size: " << rhs.window_size << std::endl + << "Checksum: " << rhs.checksum << std::endl; + + return lhs; +} -- cgit v1.2.3