[PATCH net-next 10/11] selftests: mptcp: simult_flow: test name in pcap file

[Matthieu Baerts (NGI0)]

To be able to easily find out which pcap was produced by which test, the
selftest name is now added to the pcap file, similar to the other tests.

While at it, print the prefix name to be able to find which capture
files have been produced by which test after several runs. This prefix
was not printed anywhere before.

Reviewed-by: Mat Martineau <martineau@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
---
To: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
---
 tools/testing/selftests/net/mptcp/simult_flows.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/mptcp/simult_flows.sh b/tools/testing/selftests/net/mptcp/simult_flows.sh
index 7b9aabe10170..d723261bdc62 100755
--- a/tools/testing/selftests/net/mptcp/simult_flows.sh
+++ b/tools/testing/selftests/net/mptcp/simult_flows.sh
@@ -24,6 +24,7 @@ small=""
 sout=""
 cout=""
 capout=""
+capprefix=""
 size=0
 
 usage() {
@@ -70,6 +71,11 @@ setup()
 
 	mptcp_lib_ns_init ns1 ns2 ns3
 
+	if $capture; then
+		capprefix="simult_flows-${ns1:4}"
+		mptcp_lib_pr_info "pcap will have this prefix: ${capprefix}-"
+	fi
+
 	ip link add ns1eth1 netns "$ns1" type veth peer name ns2eth1 netns "$ns2"
 	ip link add ns1eth2 netns "$ns1" type veth peer name ns2eth2 netns "$ns2"
 	ip link add ns2eth3 netns "$ns2" type veth peer name ns3eth1 netns "$ns3"
@@ -136,14 +142,13 @@ do_transfer()
 
 	if $capture; then
 		local capuser
-		local rndh="${ns1:4}"
 		if [ -z $SUDO_USER ] ; then
 			capuser=""
 		else
 			capuser="-Z $SUDO_USER"
 		fi
 
-		local capfile="${rndh}-${port}"
+		local capfile="${capprefix}-${port}"
 		local capopt="-i any -s 65535 -B 32768 ${capuser}"
 
 		ip netns exec ${ns3}  tcpdump ${capopt} -w "${capfile}-listener.pcap"  >> "${capout}" 2>&1 &

-- 
2.53.0