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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 <fstream>
#include <cstdlib>
#include "mappedfile.hpp"
#include "memreader.hpp"
#include "streamsorter.hpp"
#include "path.hpp"
#include "allocator.hpp"
#include "pcapreader.hpp"
#include "progress.hpp"
StreamSorter::StreamSorter(size_t flowTableSize, const string& workingDirectory, size_t memoryLimit)
: flowTableSize(flowTableSize),
workingDirectory(workingDirectory),
allocator(memoryLimit, 1024*10),
streamID(0)
{
}
void StreamSorter::sort(const string &inputPcapFilePath, const string &outputBinFilePath)
{
setTempFileName();
sortChunks(inputPcapFilePath);
mergeChunks(outputBinFilePath);
}
void StreamSorter::sortChunks(const string &inputPcapFilePath)
{
ofstream outputTempFile;
outputTempFile.open(tempFilePath.c_str());
if (!outputTempFile.is_open())
return ;
PcapReader pr;
PcapPkt pkt;
if (pr.open(inputPcapFilePath)) {
pr.getError();
return;
}
PcapPkt::allocator = &allocator;
Progress progress(pr.end());
uint32_t packetDetail = progress.addDetail("packet count");
ft = new FlowTable<pkt_tuple, uint32_t>(flowTableSize);
resetStreams();
while (pr.read(&pkt)) {
processPkt(pkt);
if (progress.couldRefresh()) {
progress.setProgress(pr.pos());
progress.setDetail(packetDetail, pr.getPktReadCount());
progress.refresh();
}
if (allocator.lowThresholdReached()) {
flushStreams(&outputTempFile);
}
}
progress.setProgress();
progress.setDetail(packetDetail, pr.getPktReadCount());
progress.refresh(true);
pr.close();
flushStreams(&outputTempFile);
PcapPkt::allocator = NULL;
outputTempFile.close();
delete ft;
}
void StreamSorter::resetStreams()
{
streams.clear();
}
void StreamSorter::flushStreams(ofstream *outputTempFile)
{
size_t flushCount = 0;
size_t offset = outputTempFile->tellp();
Progress progress(streams.size());
cout << endl;
progress.setTitle("flush ");
for (size_t i = 0; i < streams.size(); ++i) {
if (streams[i].hasFlushablePackets()) {
streams[i].flush(outputTempFile);
flushCount++;
}
if (progress.couldRefresh()) {
progress.setProgress(i);
progress.refresh();
}
}
progress.setProgress();
progress.refresh(true);
if (flushCount)
flushOffsets.push_back(offset);
allocator.reset();
}
Stream3 *StreamSorter::addNewStream(PcapPkt::L4Proto proto)
{
streams.push_back(Stream3(streamID++, proto));
return &streams.back();
}
FlowTable<pkt_tuple, uint32_t>::entry* StreamSorter::getFlowEntry(const PcapPkt &pkt)
{
FlowTable<pkt_tuple, uint32_t>::entry *a;
struct pkt_tuple pt = pkt.parsePkt();
Stream3 *stream = NULL;
a = ft->lookup(pt.flip());
if (!a) {
a = ft->lookup(pt);
if (!a) {
stream = addNewStream(pkt.getProto());
a = ft->insert(pt, stream->getID(), pkt.ts());
}
}
if (a->expired(pkt.ts(), streams[a->value].getTimeout())) {
ft->remove(a);
stream = addNewStream(pkt.getProto());
a = ft->insert(pt, stream->getID(), pkt.ts());
}
return a;
}
void StreamSorter::processPkt(const PcapPkt &pkt)
{
FlowTable<pkt_tuple, uint32_t>::entry *a;
a = getFlowEntry(pkt);
a->tv = pkt.ts();
streams[a->value].addPkt(pkt);
}
void StreamSorter::mergeChunks(const string &outputBinFile)
{
cout << "merging chunks: " << tempFilePath << " to " << outputBinFile << endl;
cout << "have " << flushOffsets.size() << " parts to merge" << endl;
MappedFile tempFile;
if (tempFile.open(tempFilePath)) {
cerr << "failed to open temp file" << endl;
return;
}
ofstream file;
file.open(outputBinFile.c_str());
if (!file.is_open()) {
cerr << "failed top open file '" << outputBinFile << "'" << endl;
return;
}
MemReader memReader(&tempFile, flushOffsets);
Stream3 stream;
Progress progress(memReader.getTotalLength());
while (memReader.read(&stream)) {
stream.flush(&file);
if (progress.couldRefresh()) {
progress.setProgress(memReader.consumed());
progress.refresh();
}
}
progress.setProgress();
progress.refresh(true);
tempFile.close();
}
void StreamSorter::setTempFileName()
{
tempFilePath = Path(workingDirectory).add("/tmp").str();
}
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