From 5bf62a0c3cc95abe918f3e772bb10e0a90fdce22 Mon Sep 17 00:00:00 2001 From: Jeremy Allison Date: Tue, 11 Jul 2006 17:09:38 +0000 Subject: r16943: Add Jim's code. Jeremy. (This used to be commit f131bf8f16fd8b7c49e6065ecbf6f8686b2f4269) --- examples/pcap2nbench/ip.cpp | 66 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 examples/pcap2nbench/ip.cpp (limited to 'examples/pcap2nbench/ip.cpp') diff --git a/examples/pcap2nbench/ip.cpp b/examples/pcap2nbench/ip.cpp new file mode 100644 index 0000000000..02404c1d3c --- /dev/null +++ b/examples/pcap2nbench/ip.cpp @@ -0,0 +1,66 @@ +/*\ + * 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 2 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Written by Anthony Liguori +\*/ + +#include +#include +#include +#include "ip.hpp" + +ip::ip(const uint8_t *data, size_t length) +{ + if (length < 20) { + std::cerr << "Invalid ip packet" << std::endl; + } + + version = (data[0] >> 4) & 0x0F; + header_length = (data[0] & 0x0F) * 4; + dsfield = data[1]; + memcpy(&total_length, data + 2, 2); + total_length = ntohs(total_length); + memcpy(&id, data + 4, 2); + id = ntohs(id); + flags = (data[6] >> 4) & 0x0F; + fragment_offset = ((data[6] & 0x0F) << 4) | data[7]; + ttl = data[8]; + protocol = data[9]; + memcpy(&checksum, data + 10, 2); + checksum = ntohs(checksum); + memcpy(&source, data + 12, 4); + memcpy(&destination, data + 16, 4); +} + +std::ostream &operator<<(std::ostream &lhs, const ip &rhs) +{ + lhs << "Version: " << (uint32_t)rhs.version << std::endl + << "Header length: " << (uint32_t)rhs.header_length << std::endl + << "Differentiated Services Field: " << (uint32_t)rhs.dsfield << std::endl + << "Total Length: " << (uint32_t)rhs.total_length << std::endl + << "Identification: " << (uint32_t)rhs.id << std::endl + << "Flags: " << (uint32_t)rhs.flags << std::endl + << "Fragment offset: " << (uint32_t)rhs.fragment_offset << std::endl + << "TTL: " << (uint32_t)rhs.ttl << std::endl + << "Protocol: " << (uint32_t)rhs.protocol << std::endl + << "Checksum: " << (uint32_t)rhs.checksum << std::endl + << "Source: " << inet_ntoa(*((in_addr *)&rhs.source)) << std::endl + << "Destination: " << inet_ntoa(*((in_addr *)&rhs.destination)) << std::endl; + + return lhs; +} -- cgit