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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#include <iostream>
#include <iomanip>
#include <arpa/inet.h>
#include "pcapwriter.hpp"
#include "stream.hpp"
Stream::Stream(uint32_t id, uint32_t sizeHint)
: m_id(id), m_prevPktIsClient(false)
{
m_client.pkts.reserve(sizeHint / 2);
m_server.pkts.reserve(sizeHint / 2);
m_pkts.reserve(sizeHint);
}
bool Stream::isClient(const PcapPkt &pkt) const
{
return m_pt == pkt.parsePkt();
}
size_t Stream::pktCount() const
{
return m_client.pkts.size() + m_server.pkts.size();
}
void Stream::setTupleFromPkt(const PcapPkt &pkt)
{
m_pt = pkt.parsePkt();
}
void Stream::addPkt(const PcapPkt &pkt)
{
if (!pktCount())
setTupleFromPkt(pkt);
bool isClientPkt = isClient(pkt);
HalfStream *half;
if (isClientPkt)
half = &m_client;
else
half = &m_server;
HalfStream::Action::Part p = half->addPkt(pkt);
if (p.len) {
addAction(half, p, isClientPkt);
}
m_pkts.push_back(pkt);
}
void Stream::addAction(HalfStream *half, HalfStream::Action::Part p, bool isClientPkt)
{
if (m_actions.empty() || m_prevPktIsClient != isClientPkt || m_pt.proto_id == IPPROTO_UDP)
m_actions.push_back(HalfStream::Action(half, p, isClientPkt));
else
m_actions.back().addPart(p);
m_prevPktIsClient = isClientPkt;
}
Stream::Header Stream::getHeader() const
{
Header h;
h.streamId = m_id;
h.clientHdrLen = m_client.hdrLen;
h.clientContentLen = m_client.contentLen;
h.serverHdrLen = m_server.hdrLen;
h.serverContentLen = m_server.contentLen;
h.actionCount = m_actions.size();
h.clientIP = m_pt.src_addr;
h.clientPort = m_pt.src_port;
h.serverIP = m_pt.dst_addr;
h.serverPort = m_pt.dst_port;
h.upRate = m_client.getRate();
h.dnRate = m_server.getRate();
h.protocol = m_pt.proto_id;
h.completedTCP = (m_client.tcpOpen && m_client.tcpClose && m_server.tcpOpen && m_server.tcpClose) ||
(!m_client.tcpOpen && !m_client.tcpClose && !m_server.tcpOpen && !m_server.tcpClose);
return h;
}
void Stream::Header::toFile(ofstream *f) const
{
f->write((const char *)this, sizeof(*this));
}
int Stream::Header::fromFile(ifstream *f)
{
const size_t readSize = sizeof(*this);
f->read((char *)this, readSize);
return f->gcount() == readSize? 0 : -1;
}
size_t Stream::Header::getStreamLen() const
{
return actionCount * sizeof(ActionEntry)
+ clientHdrLen + clientContentLen
+ serverHdrLen + serverContentLen;
}
void Stream::actionsToFile(ofstream *f) const
{
ActionEntry actionEntry;
uint32_t runningTotalLen[2] = {0};
for (size_t i = 0; i < m_actions.size(); ++i) {
actionEntry.peer = m_actions[i].isClient()? 0 : 1;
actionEntry.beg = runningTotalLen[actionEntry.peer];
actionEntry.len = m_actions[i].totLen();
runningTotalLen[actionEntry.peer] += actionEntry.len;
f->write((const char *)&actionEntry, sizeof(actionEntry));
}
}
void Stream::clientHdrToFile(ofstream *f) const
{
f->write((const char *)m_client.hdr, m_client.hdrLen);
}
void Stream::serverHdrToFile(ofstream *f) const
{
f->write((const char *)m_server.hdr, m_server.hdrLen);
}
void Stream::contentsToFile(ofstream *f, bool isClient) const
{
for (size_t i = 0; i < m_actions.size(); ++i)
if (m_actions[i].isClient() == isClient)
m_actions[i].toFile(f);
}
void Stream::toFile(ofstream *f)
{
getHeader().toFile(f);
actionsToFile(f);
clientHdrToFile(f);
serverHdrToFile(f);
contentsToFile(f, true);
contentsToFile(f, false);
}
void Stream::toPcap(const string& outFile)
{
PcapWriter pw;
pw.open(outFile);
for (size_t i = 0; i < m_pkts.size(); ++i)
pw.write(m_pkts[i]);
pw.close();
}
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