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//
// Copyright (c) 1994, 1995, 2002, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
//
// Modifications to support dynamic addresses by:
// Michael N. Lipp (mnl@dtro.e-technik.th-darmstadt.de)
//
// This file may be distributed under terms of the GPL
//
#include "netmeter.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
#include <fstream>
#include <string>
#include "stringutils.h"
static const char PROCNETDEV[] = "/proc/net/dev";
static const char SYSCLASSNET[] = "/sys/class/net";
/*
* Parse the integer count from the given filename
*
* This is quite relaxed about error conditions because the file may
* have been removed before it was opened, or truncated, in which case
* the count is zero.
*
* Return: 0 if not not avilable, otherwise count (which may be zero)
*/
static unsigned long long getCount( const char *filename ){
unsigned long long n, count = 0;
FILE *f;
f = fopen(filename, "r");
if (!f)
return 0;
if (fscanf(f, "%llu", &n) == 1)
count = n;
if (fclose(f) != 0)
abort();
return count;
}
NetMeter::NetMeter( XOSView *parent, float max )
: FieldMeterGraph( parent, 3, "NET", "IN/OUT/IDLE" ){
_maxpackets = max;
_lastBytesIn = _lastBytesOut = 0;
_usesysfs = _ignored = false;
struct stat buf;
if ( stat(SYSCLASSNET, &buf) == 0 && S_ISDIR(buf.st_mode) )
_usesysfs = true;
}
NetMeter::~NetMeter( void ){
}
void NetMeter::checkResources( void ){
FieldMeterGraph::checkResources();
setfieldcolor( 0, parent_->getResource( "netInColor" ) );
setfieldcolor( 1, parent_->getResource( "netOutColor" ) );
setfieldcolor( 2, parent_->getResource( "netBackground" ) );
priority_ = atoi( parent_->getResource( "netPriority" ) );
useGraph_ = parent_->isResourceTrue( "netGraph" );
dodecay_ = parent_->isResourceTrue( "netDecay" );
SetUsedFormat( parent_->getResource("netUsedFormat") );
_netIface = parent_->getResource( "netIface" );
if (_netIface[0] == '-') {
_ignored = true;
_netIface.erase(0, _netIface.find_first_not_of("- "));
}
}
void NetMeter::checkevent( void ){
unsigned long long totin = 0, totout = 0;
fields_[2] = _maxpackets; // assume no
fields_[0] = fields_[1] = 0; // network activity
IntervalTimerStop();
if (_usesysfs)
getSysStats(totin, totout);
else
getProcStats(totin, totout);
double t = IntervalTimeInSecs();
IntervalTimerStart();
if (_lastBytesIn == 0 && _lastBytesOut == 0) { // first run
_lastBytesIn = totin;
_lastBytesOut = totout;
}
fields_[0] = (totin - _lastBytesIn) / t;
fields_[1] = (totout - _lastBytesOut) / t;
_lastBytesIn = totin;
_lastBytesOut = totout;
total_ = fields_[0] + fields_[1];
if (total_ > _maxpackets)
fields_[2] = 0;
else {
total_ = _maxpackets;
fields_[2] = total_ - fields_[0] - fields_[1];
}
setUsed(fields_[0] + fields_[1], total_);
drawfields();
}
void NetMeter::getSysStats( unsigned long long &totin, unsigned long long &totout ){
DIR *dir;
struct dirent *ent;
char filename[128];
std::ifstream ifs;
if ( !(dir = opendir(SYSCLASSNET)) ) {
std::cerr << "Can not open directory : " << SYSCLASSNET << std::endl;
parent_->done(1);
return;
}
// walk through /sys/class/net/*/statistics/{r,t}x_bytes
while ( (ent = readdir(dir)) ) {
if ( ent->d_type != DT_LNK )
continue;
if ( _netIface != "False" &&
( (!_ignored && ent->d_name != _netIface) ||
( _ignored && ent->d_name == _netIface) ) )
continue;
snprintf_or_abort(filename, 128,
"%s/%s/statistics/rx_bytes", SYSCLASSNET, ent->d_name);
totin += getCount(filename);
snprintf_or_abort(filename, 128,
"%s/%s/statistics/tx_bytes", SYSCLASSNET, ent->d_name);
totout += getCount(filename);
}
closedir(dir);
}
void NetMeter::getProcStats( unsigned long long &totin, unsigned long long &totout ){
std::ifstream ifs(PROCNETDEV);
std::string line, ifname;
if (!ifs) {
std::cerr << "Can not open file : " << PROCNETDEV << std::endl;
parent_->done(1);
return;
}
ifs.ignore(1024, '\n');
ifs.ignore(1024, '\n');
while ( !ifs.eof() ) {
unsigned long long vals[9];
std::getline(ifs, line);
if ( !ifs.good() )
break;
int colon = line.find_first_of(':');
ifname = line.substr(0, colon);
ifname.erase(0, ifname.find_first_not_of(' '));
if (_netIface != "False") {
if ( (!_ignored && ifname != _netIface) ||
( _ignored && ifname == _netIface) )
continue;
}
std::string l = line.erase(0, colon + 1);
const char *cur = l.c_str();
if ( strncmp(cur, " No ", 4) == 0 )
continue; // xxx: No statistics available.
char *end = NULL;
for (int i = 0; i < 9; i++) {
vals[i] = strtoull(cur, &end, 10);
cur = end;
}
totin += vals[0];
totout += vals[8];
XOSDEBUG("%s: %llu bytes received, %llu bytes sent.\n",
ifname.c_str(), vals[0], vals[8]);
}
}
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