[SOLVED] Port Counters

jayadhanesh · 08-08-2012, 01:10 AM

Hi,

I want to read the Rx/TX Pkts/Bytes on an ethernet port. I know ifconfig will give this. Is there any command which will
give these values or should I parse the ifconfig output to get the value? How do I clear these counters?

Thanks,
Dhanesh.

evo2 · 08-08-2012, 01:44 AM

Hi,

you should be able to get this information directly from /proc/net/dev
The values will continue to increase, instead or "reseting" them you should subtract from the previous reading.

Evo2.

jayadhanesh · 08-09-2012, 12:22 AM

Thanks Evo, I meant, is there a system call or ioctl call to read these values or should I write a C code to
parse them?

evo2 · 08-09-2012, 12:34 AM

Hi,

sorry don't know about any system calls.

But it's not hard to parse, and the there is no need to write in c. Write it in whatever language you like. I use a widget written in lua (for awesome wm) that reads /proc/net/dev to provide upload/download stats.

What are you actually trying to do?

Evo2.

jayadhanesh · 08-09-2012, 11:06 PM

Iam trying to read Tx /RX bytes/packets for a given ethernet interface

evo2 · 08-13-2012, 06:02 PM

Hi,

so I don't see what your problem is. How about the following that outputs the number of rx and tx in ~= 1 sec intervals.

Code:

#!/bin/bash
device="eth0"
first=0
while true ; do
    while read line ; do
	a=($line)
	if [ "${a[0]}" != "${device}:" ] ; then
	    continue
	fi
	if [ $first -ne 0 ] ; then
	    rx=$(( ${a[2]} - $rxsum ))
	    tx=$(( ${a[9]} - $txsum ))
	    echo "${a[0]} $rx $tx"
	fi
	rxsum=${a[2]}
	txsum=${a[9]}
	first=1
    done < /proc/net/dev
    sleep 1
done

Evo2.