["Maynard, Chris" <Christopher.Maynard@xxxxxxx>]

I don’t know how you can identify your protocol, but if it runs atop tcp, then you might be able to use ss (or netstat) to detect when there’s no longer a session established, and then kill tshark once you detect that condition?

 

Example script:

 

#!/bin/sh

 

IP_ADDR=10\.10\.10\.10

PORT_NUM=1000

PROG=tshark

 

while true

do

        #netstat -ntp | grep "${IP_ADDR}:${PORT_NUM}.*ESTABLISHED" > /dev/null

        ss -tn | grep "ESTAB.*${IP_ADDR}:${PORT_NUM}" > /dev/null

        if (( $? != 0 ))

        then

                kill -s INT `pidof ${PROG}`

                exit 0

        fi

        sleep 1

done

 

- Chris

 

From: Wireshark-users [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Graham Bloice
Sent: Thursday, November 9, 2017 5:31 AM
To: Community support list for Wireshark <wireshark-users@xxxxxxxxxxxxx>
Subject: Re: [Wireshark-users] Stop cycling capture with tshark

 

 

 

On 9 November 2017 at 10:14, Helge Kruse <Helge.Kruse@xxxxxxx> wrote:

I have setup a stress test with a network device. After some hours or
days I experience a failure. The device still responds to ICMP echo
and similar but the protocol under test is not working anymore. I
would like to know what happend before and at the failure.

I use tshark to capture the traffic as

  tshark -w file.pcap -b filesize:100000 -b files:8 host 10.0.01

The test program at my Windows PC identfies the problem. But tshark
will continue and the files are overwritten after a period of time
because not all of the traffic stops.

How can I stop tshark from a different process?

 

Probably easiest to spawn a command line utility to kill any process named "tshark.exe", although that might well leave dumpcap.exe running, so that should be killed as well.

 

--

Graham Bloice

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