 | 1 | initial version |
Tshark has no mechanism to do that.
If you're on a UN*X, so that you have the sed command available, you could try
tshark -r test.pcap -T fields -e frame.number -e ip.src -e ip.dst | sed "a\\
++++++++++++++++++++++++++++++
" >test.txt
Note that the command really is on 3 separate lines. The newline after the a\ command is required, as is the newline after the sequence of +'s.