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selftests: forwarding: add TCPDUMP_EXTRA_FLAGS to lib.sh

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For some use-cases we may want to change the tcpdump flags used in
tcpdump_start().  For instance, observing interfaces without the PROMISC
flag, e.g. to see what's really being forwarded to the bridge interface.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joachim Wiberg 2022-04-22 13:14:58 +03:00 committed by David S. Miller
parent b343734ee2
commit fe32dffdcd
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/net/forwarding/lib.sh Normal file → Executable file
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@ -28,6 +28,7 @@ LOW_AGEING_TIME=${LOW_AGEING_TIME:=1000}
REQUIRE_JQ=${REQUIRE_JQ:=yes}
REQUIRE_MZ=${REQUIRE_MZ:=yes}
STABLE_MAC_ADDRS=${STABLE_MAC_ADDRS:=no}
TCPDUMP_EXTRA_FLAGS=${TCPDUMP_EXTRA_FLAGS:=}
relative_path="${BASH_SOURCE%/*}"
if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
@ -1405,7 +1406,7 @@ tcpdump_start()
capuser="-Z $SUDO_USER"
fi
$ns_cmd tcpdump -e -n -Q in -i $if_name \
$ns_cmd tcpdump $TCPDUMP_EXTRA_FLAGS -e -n -Q in -i $if_name \
-s 65535 -B 32768 $capuser -w $capfile > "$capout" 2>&1 &
cappid=$!