need tshark.
@@ -19,6 +19,7 @@ before_install:
- sudo tcpdump -i ens4 -w /home/travis/build/$TRAVIS_REPO_SLUG/tests/trace_ab99_2001-01-01_02_03-client-ip-1-2-3-4.pcap &
- sudo apt-get update
- sudo apt-get install docker-ce
+ - DEBIAN_FRONTEND=noninteractive sudo apt-get install tshark
- sudo pkill tcpdump
- sudo chmod 777 /home/travis/build/$TRAVIS_REPO_SLUG/tests/trace*.pcap
- mkdir -p /home/travis/build/$TRAVIS_REPO_SLUG/opts
