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// $Id$
#include "ace/Monitor_Control/Linux_Network_Interface_Monitor.h"
#if defined (ACE_LINUX) || defined (AIX)
#include "ace/Log_Msg.h"
#include "ace/OS_NS_stdio.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
namespace ACE
{
namespace Monitor_Control
{
Linux_Network_Interface_Monitor::Linux_Network_Interface_Monitor (
const char *scan_format)
: value_ (0UL),
start_ (0UL),
scan_format_ (scan_format)
{
this->init ();
}
void
Linux_Network_Interface_Monitor::update_i (void)
{
char buf[1024];
FILE* fp = ACE_OS::fopen (ACE_TEXT ("/proc/net/dev"),
ACE_TEXT ("r"));
if (fp == 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("bytes sent - opening ")
ACE_TEXT ("/proc/net/dev failed\n")));
return;
}
/// Ignore the first 2 lines of the file, which are file
/// and column headers.
void* dummy = ACE_OS::fgets (buf, sizeof (buf), fp);
ACE_UNUSED_ARG (dummy);
dummy = ACE_OS::fgets (buf, sizeof (buf), fp);
ACE_UNUSED_ARG (dummy);
unsigned long iface_value = 0UL;
ACE_UINT32 iface_index = 0UL;
ACE_UINT64 total_value = 0UL;
while (ACE_OS::fgets (buf, sizeof (buf), fp) != 0)
{
sscanf (buf, this->scan_format_.c_str (), &iface_value);
/// If the monitor runs long enough, the system counters will
/// wrap around, the statement below is an attempt to correct
/// for that.
this->value_array_[iface_index] +=
iface_value
- static_cast<unsigned long> (this->value_array_[iface_index]);
total_value += this->value_array_[iface_index];
++iface_index;
}
this->value_ = total_value - this->start_;
(void) ACE_OS::fclose (fp);
}
void
Linux_Network_Interface_Monitor::clear_impl (void)
{
this->init ();
}
void
Linux_Network_Interface_Monitor::init (void)
{
for (unsigned long i = 0UL; i < MAX_INTERFACES; ++i)
{
this->value_array_[i] = 0UL;
}
/// Read the file once to get a base value that we can subtract
/// from subsequent readings to get bytes sent since we started
/// monitoring.
char buf[1024];
FILE* fp = ACE_OS::fopen (ACE_TEXT ("/proc/net/dev"),
ACE_TEXT ("r"));
if (fp == 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("bytes sent - opening ")
ACE_TEXT ("/proc/net/dev failed\n")));
return;
}
/// Ignore the first 2 lines of the file, which are file
/// and column headers.
void* dummy = ACE_OS::fgets (buf, sizeof (buf), fp);
ACE_UNUSED_ARG (dummy);
dummy = ACE_OS::fgets (buf, sizeof (buf), fp);
ACE_UNUSED_ARG (dummy);
unsigned long iface_value = 0UL;
ACE_UINT32 iface_index = 0UL;
while (ACE_OS::fgets (buf, sizeof (buf), fp) != 0)
{
sscanf (buf, this->scan_format_.c_str (), &iface_value);
this->start_ += iface_value;
++iface_index;
}
(void) ACE_OS::fclose (fp);
}
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* defined (ACE_LINUX) || defined (AIX) */
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