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/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "devreader-linux-proc.h"
#include "stringutils.h"
#include <fstream>
#include <list>
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
using namespace std;
DevReaderLinuxProc::DevReaderLinuxProc(const string& deviceName)
: DevReader(deviceName)
{
}
DevReaderLinuxProc::~DevReaderLinuxProc()
{
}
bool DevReaderLinuxProc::isAvailable()
{
struct stat procStat;
if(stat("/proc/net/dev", &procStat) < 0 || ! S_ISREG(procStat.st_mode))
return false;
return true;
}
list<string> DevReaderLinuxProc::findAllDevices()
{
list<string> interfaceNames;
ifstream fin("/proc/net/dev");
if(!fin.is_open())
return interfaceNames;
// skip the two header lines
string line;
getline(fin, line);
getline(fin, line);
if(!fin.good())
return interfaceNames;
// read all remaining lines and extract the device name
while(fin.good())
{
getline(fin, line);
if(line.empty())
continue;
string::size_type posEnd = line.find(':');
if(posEnd == string::npos)
continue;
interfaceNames.push_back(trim(line.substr(0, posEnd)));
}
return interfaceNames;
}
void DevReaderLinuxProc::readFromDevice(DataFrame& dataFrame)
{
if(m_deviceName.empty())
return;
ifstream fin("/proc/net/dev");
if(!fin.is_open())
return;
// skip the two header lines
string line;
getline(fin, line);
getline(fin, line);
if(!fin.good())
return;
// search for device
while(fin.good())
{
getline(fin, line);
if(line.empty())
continue;
string::size_type posEnd = line.find(':');
if(posEnd == string::npos)
continue;
string interfaceName = trim(line.substr(0, posEnd));
if(interfaceName.empty())
continue;
// check if it is the device we want
if(m_deviceName != interfaceName)
continue;
// read device data
unsigned long long bytesIn = 0;
unsigned long long packetsIn = 0;
unsigned long long errorsIn = 0;
unsigned long long dropsIn = 0;
unsigned long long bytesOut = 0;
unsigned long long packetsOut = 0;
unsigned long long errorsOut = 0;
unsigned long long dropsOut = 0;
unsigned long long dummy = 0;
istringstream sin(trim(line.substr(posEnd + 1)));
sin >> bytesIn
>> packetsIn
>> errorsIn
>> dropsIn
>> dummy
>> dummy
>> dummy
>> dummy
>> bytesOut
>> packetsOut
>> errorsOut
>> dropsOut;
if(sin.fail())
break;
dataFrame.setTotalDataIn(bytesIn);
dataFrame.setTotalDataOut(bytesOut);
dataFrame.setTotalPacketsIn(packetsIn);
dataFrame.setTotalPacketsOut(packetsOut);
dataFrame.setTotalErrorsIn(errorsIn);
dataFrame.setTotalErrorsOut(errorsOut);
dataFrame.setTotalDropsIn(dropsIn);
dataFrame.setTotalDropsOut(dropsOut);
dataFrame.setValid(true);
break;
}
}
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