samples/bpf/test_lwt_bpf.sh - linux - Git at Google

 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0

 # Uncomment to see generated bytecode
 #VERBOSE=verbose

 NS1=lwt_ns1
 NS2=lwt_ns2
 VETH0=tst_lwt1a
 VETH1=tst_lwt1b
 VETH2=tst_lwt2a
 VETH3=tst_lwt2b
 IPVETH0="192.168.254.1"
 IPVETH1="192.168.254.2"
 IPVETH1b="192.168.254.3"

 IPVETH2="192.168.111.1"
 IPVETH3="192.168.111.2"

 IP_LOCAL="192.168.99.1"

 TRACE_ROOT=/sys/kernel/debug/tracing

 function lookup_mac()
 {
 	set +x
 	if [ ! -z "$2" ]; then
 		MAC=$(ip netns exec $2 ip link show $1 | grep ether | awk '{print $2}')
 	else
 		MAC=$(ip link show $1 | grep ether | awk '{print $2}')
 	fi
 	MAC="${MAC//:/}"
 	echo "0x${MAC:10:2}${MAC:8:2}${MAC:6:2}${MAC:4:2}${MAC:2:2}${MAC:0:2}"
 	set -x
 }

 function cleanup {
 	set +ex
 	rm test_lwt_bpf.o 2> /dev/null
 	ip link del $VETH0 2> /dev/null
 	ip link del $VETH1 2> /dev/null
 	ip link del $VETH2 2> /dev/null
 	ip link del $VETH3 2> /dev/null
 	ip netns exec $NS1 killall netserver
 	ip netns delete $NS1 2> /dev/null
 	ip netns delete $NS2 2> /dev/null
 	set -ex
 }

 function setup_one_veth {
 	ip netns add $1
 	ip link add $2 type veth peer name $3
 	ip link set dev $2 up
 	ip addr add $4/24 dev $2
 	ip link set $3 netns $1
 	ip netns exec $1 ip link set dev $3 up
 	ip netns exec $1 ip addr add $5/24 dev $3

 	if [ "$6" ]; then
 		ip netns exec $1 ip addr add $6/32 dev $3
 	fi
 }

 function get_trace {
 	set +x
 	cat ${TRACE_ROOT}/trace | grep -v '^#'
 	set -x
 }

 function cleanup_routes {
 	ip route del ${IPVETH1}/32 dev $VETH0 2> /dev/null || true
 	ip route del table local local ${IP_LOCAL}/32 dev lo 2> /dev/null || true
 }

 function install_test {
 	cleanup_routes
 	cp /dev/null ${TRACE_ROOT}/trace

 	OPTS="encap bpf headroom 14 $1 obj test_lwt_bpf.o section $2 $VERBOSE"

 	if [ "$1" == "in" ];  then
 		ip route add table local local ${IP_LOCAL}/32 $OPTS dev lo
 	else
 		ip route add ${IPVETH1}/32 $OPTS dev $VETH0
 	fi
 }

 function remove_prog {
 	if [ "$1" == "in" ];  then
 		ip route del table local local ${IP_LOCAL}/32 dev lo
 	else
 		ip route del ${IPVETH1}/32 dev $VETH0
 	fi
 }

 function filter_trace {
 	# Add newline to allow starting EXPECT= variables on newline
 	NL=$'\n'
 	echo "${NL}$*" | sed -e 's/^.*: : //g'
 }

 function expect_fail {
 	set +x
 	echo "FAIL:"
 	echo "Expected: $1"
 	echo "Got: $2"
 	set -x
 	exit 1
 }

 function match_trace {
 	set +x
 	RET=0
 	TRACE=$1
 	EXPECT=$2
 	GOT="$(filter_trace "$TRACE")"

 	[ "$GOT" != "$EXPECT" ] && {
 		expect_fail "$EXPECT" "$GOT"
 		RET=1
 	}
 	set -x
 	return $RET
 }

 function test_start {
 	set +x
 	echo "----------------------------------------------------------------"
 	echo "Starting test: $*"
 	echo "----------------------------------------------------------------"
 	set -x
 }

 function failure {
 	get_trace
 	echo "FAIL: $*"
 	exit 1
 }

 function test_ctx_xmit {
 	test_start "test_ctx on lwt xmit"
 	install_test xmit test_ctx
 	ping -c 3 $IPVETH1 || {
 		failure "test_ctx xmit: packets are dropped"
 	}
 	match_trace "$(get_trace)" "
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX" || exit 1
 	remove_prog xmit
 }

 function test_ctx_out {
 	test_start "test_ctx on lwt out"
 	install_test out test_ctx
 	ping -c 3 $IPVETH1 || {
 		failure "test_ctx out: packets are dropped"
 	}
 	match_trace "$(get_trace)" "
 len 84 hash 0 protocol 0
 cb 1234 ingress_ifindex 0 ifindex 0
 len 84 hash 0 protocol 0
 cb 1234 ingress_ifindex 0 ifindex 0
 len 84 hash 0 protocol 0
 cb 1234 ingress_ifindex 0 ifindex 0" || exit 1
 	remove_prog out
 }

 function test_ctx_in {
 	test_start "test_ctx on lwt in"
 	install_test in test_ctx
 	ping -c 3 $IP_LOCAL || {
 		failure "test_ctx out: packets are dropped"
 	}
 	# We will both request & reply packets as the packets will
 	# be from $IP_LOCAL => $IP_LOCAL
 	match_trace "$(get_trace)" "
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1
 len 84 hash 0 protocol 8
 cb 1234 ingress_ifindex 1 ifindex 1" || exit 1
 	remove_prog in
 }

 function test_data {
 	test_start "test_data on lwt $1"
 	install_test $1 test_data
 	ping -c 3 $IPVETH1 || {
 		failure "test_data ${1}: packets are dropped"
 	}
 	match_trace "$(get_trace)" "
 src: 1fea8c0 dst: 2fea8c0
 src: 1fea8c0 dst: 2fea8c0
 src: 1fea8c0 dst: 2fea8c0" || exit 1
 	remove_prog $1
 }

 function test_data_in {
 	test_start "test_data on lwt in"
 	install_test in test_data
 	ping -c 3 $IP_LOCAL || {
 		failure "test_data in: packets are dropped"
 	}
 	# We will both request & reply packets as the packets will
 	# be from $IP_LOCAL => $IP_LOCAL
 	match_trace "$(get_trace)" "
 src: 163a8c0 dst: 163a8c0
 src: 163a8c0 dst: 163a8c0
 src: 163a8c0 dst: 163a8c0
 src: 163a8c0 dst: 163a8c0
 src: 163a8c0 dst: 163a8c0
 src: 163a8c0 dst: 163a8c0" || exit 1
 	remove_prog in
 }

 function test_cb {
 	test_start "test_cb on lwt $1"
 	install_test $1 test_cb
 	ping -c 3 $IPVETH1 || {
 		failure "test_cb ${1}: packets are dropped"
 	}
 	match_trace "$(get_trace)" "
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0" || exit 1
 	remove_prog $1
 }

 function test_cb_in {
 	test_start "test_cb on lwt in"
 	install_test in test_cb
 	ping -c 3 $IP_LOCAL || {
 		failure "test_cb in: packets are dropped"
 	}
 	# We will both request & reply packets as the packets will
 	# be from $IP_LOCAL => $IP_LOCAL
 	match_trace "$(get_trace)" "
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0
 cb0: 0 cb1: 0 cb2: 0
 cb3: 0 cb4: 0" || exit 1
 	remove_prog in
 }

 function test_drop_all {
 	test_start "test_drop_all on lwt $1"
 	install_test $1 drop_all
 	ping -c 3 $IPVETH1 && {
 		failure "test_drop_all ${1}: Unexpected success of ping"
 	}
 	match_trace "$(get_trace)" "
 dropping with: 2
 dropping with: 2
 dropping with: 2" || exit 1
 	remove_prog $1
 }

 function test_drop_all_in {
 	test_start "test_drop_all on lwt in"
 	install_test in drop_all
 	ping -c 3 $IP_LOCAL && {
 		failure "test_drop_all in: Unexpected success of ping"
 	}
 	match_trace "$(get_trace)" "
 dropping with: 2
 dropping with: 2
 dropping with: 2" || exit 1
 	remove_prog in
 }

 function test_push_ll_and_redirect {
 	test_start "test_push_ll_and_redirect on lwt xmit"
 	install_test xmit push_ll_and_redirect
 	ping -c 3 $IPVETH1 || {
 		failure "Redirected packets appear to be dropped"
 	}
 	match_trace "$(get_trace)" "
 redirected to $DST_IFINDEX
 redirected to $DST_IFINDEX
 redirected to $DST_IFINDEX" || exit 1
 	remove_prog xmit
 }

 function test_no_l2_and_redirect {
 	test_start "test_no_l2_and_redirect on lwt xmit"
 	install_test xmit fill_garbage_and_redirect
 	ping -c 3 $IPVETH1 && {
 		failure "Unexpected success despite lack of L2 header"
 	}
 	match_trace "$(get_trace)" "
 redirected to $DST_IFINDEX
 redirected to $DST_IFINDEX
 redirected to $DST_IFINDEX" || exit 1
 	remove_prog xmit
 }

 function test_rewrite {
 	test_start "test_rewrite on lwt xmit"
 	install_test xmit test_rewrite
 	ping -c 3 $IPVETH1 || {
 		failure "Rewritten packets appear to be dropped"
 	}
 	match_trace "$(get_trace)" "
 out: rewriting from 2fea8c0 to 3fea8c0
 out: rewriting from 2fea8c0 to 3fea8c0
 out: rewriting from 2fea8c0 to 3fea8c0" || exit 1
 	remove_prog out
 }

 function test_fill_garbage {
 	test_start "test_fill_garbage on lwt xmit"
 	install_test xmit fill_garbage
 	ping -c 3 $IPVETH1 && {
 		failure "test_drop_all ${1}: Unexpected success of ping"
 	}
 	match_trace "$(get_trace)" "
 Set initial 96 bytes of header to FF
 Set initial 96 bytes of header to FF
 Set initial 96 bytes of header to FF" || exit 1
 	remove_prog xmit
 }

 function test_netperf_nop {
 	test_start "test_netperf_nop on lwt xmit"
 	install_test xmit nop
 	netperf -H $IPVETH1 -t TCP_STREAM || {
 		failure "packets appear to be dropped"
 	}
 	match_trace "$(get_trace)" ""|| exit 1
 	remove_prog xmit
 }

 function test_netperf_redirect {
 	test_start "test_netperf_redirect on lwt xmit"
 	install_test xmit push_ll_and_redirect_silent
 	netperf -H $IPVETH1 -t TCP_STREAM || {
 		failure "Rewritten packets appear to be dropped"
 	}
 	match_trace "$(get_trace)" ""|| exit 1
 	remove_prog xmit
 }

 cleanup
 setup_one_veth $NS1 $VETH0 $VETH1 $IPVETH0 $IPVETH1 $IPVETH1b
 setup_one_veth $NS2 $VETH2 $VETH3 $IPVETH2 $IPVETH3
 ip netns exec $NS1 netserver
 echo 1 > ${TRACE_ROOT}/tracing_on

 DST_MAC=$(lookup_mac $VETH1 $NS1)
 SRC_MAC=$(lookup_mac $VETH0)
 DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex)

 CLANG_OPTS="-O2 -target bpf -I ../include/"
 CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX"
 clang $CLANG_OPTS -c test_lwt_bpf.c -o test_lwt_bpf.o

 test_ctx_xmit
 test_ctx_out
 test_ctx_in
 test_data "xmit"
 test_data "out"
 test_data_in
 test_cb "xmit"
 test_cb "out"
 test_cb_in
 test_drop_all "xmit"
 test_drop_all "out"
 test_drop_all_in
 test_rewrite
 test_push_ll_and_redirect
 test_no_l2_and_redirect
 test_fill_garbage
 test_netperf_nop
 test_netperf_redirect

 cleanup
 echo 0 > ${TRACE_ROOT}/tracing_on
 exit 0
	#!/bin/bash
	# SPDX-License-Identifier: GPL-2.0

	# Uncomment to see generated bytecode
	#VERBOSE=verbose

	NS1=lwt_ns1
	NS2=lwt_ns2
	VETH0=tst_lwt1a
	VETH1=tst_lwt1b
	VETH2=tst_lwt2a
	VETH3=tst_lwt2b
	IPVETH0="192.168.254.1"
	IPVETH1="192.168.254.2"
	IPVETH1b="192.168.254.3"

	IPVETH2="192.168.111.1"
	IPVETH3="192.168.111.2"

	IP_LOCAL="192.168.99.1"

	TRACE_ROOT=/sys/kernel/debug/tracing

	function lookup_mac()
	{
	set +x
	if [ ! -z "$2" ]; then
	MAC=$(ip netns exec $2 ip link show $1 \| grep ether \| awk '{print $2}')
	else
	MAC=$(ip link show $1 \| grep ether \| awk '{print $2}')
	fi
	MAC="${MAC//:/}"
	echo "0x${MAC:10:2}${MAC:8:2}${MAC:6:2}${MAC:4:2}${MAC:2:2}${MAC:0:2}"
	set -x
	}

	function cleanup {
	set +ex
	rm test_lwt_bpf.o 2> /dev/null
	ip link del $VETH0 2> /dev/null
	ip link del $VETH1 2> /dev/null
	ip link del $VETH2 2> /dev/null
	ip link del $VETH3 2> /dev/null
	ip netns exec $NS1 killall netserver
	ip netns delete $NS1 2> /dev/null
	ip netns delete $NS2 2> /dev/null
	set -ex
	}

	function setup_one_veth {
	ip netns add $1
	ip link add $2 type veth peer name $3
	ip link set dev $2 up
	ip addr add $4/24 dev $2
	ip link set $3 netns $1
	ip netns exec $1 ip link set dev $3 up
	ip netns exec $1 ip addr add $5/24 dev $3

	if [ "$6" ]; then
	ip netns exec $1 ip addr add $6/32 dev $3
	fi
	}

	function get_trace {
	set +x
	cat ${TRACE_ROOT}/trace \| grep -v '^#'
	set -x
	}

	function cleanup_routes {
	ip route del ${IPVETH1}/32 dev $VETH0 2> /dev/null \|\| true
	ip route del table local local ${IP_LOCAL}/32 dev lo 2> /dev/null \|\| true
	}

	function install_test {
	cleanup_routes
	cp /dev/null ${TRACE_ROOT}/trace

	OPTS="encap bpf headroom 14 $1 obj test_lwt_bpf.o section $2 $VERBOSE"

	if [ "$1" == "in" ]; then
	ip route add table local local ${IP_LOCAL}/32 $OPTS dev lo
	else
	ip route add ${IPVETH1}/32 $OPTS dev $VETH0
	fi
	}

	function remove_prog {
	if [ "$1" == "in" ]; then
	ip route del table local local ${IP_LOCAL}/32 dev lo
	else
	ip route del ${IPVETH1}/32 dev $VETH0
	fi
	}

	function filter_trace {
	# Add newline to allow starting EXPECT= variables on newline
	NL=$'\n'
	echo "${NL}$" \| sed -e 's/^.: : //g'
	}

	function expect_fail {
	set +x
	echo "FAIL:"
	echo "Expected: $1"
	echo "Got: $2"
	set -x
	exit 1
	}

	function match_trace {
	set +x
	RET=0
	TRACE=$1
	EXPECT=$2
	GOT="$(filter_trace "$TRACE")"

	[ "$GOT" != "$EXPECT" ] && {
	expect_fail "$EXPECT" "$GOT"
	RET=1
	}
	set -x
	return $RET
	}

	function test_start {
	set +x
	echo "----------------------------------------------------------------"
	echo "Starting test: $*"
	echo "----------------------------------------------------------------"
	set -x
	}

	function failure {
	get_trace
	echo "FAIL: $*"
	exit 1
	}

	function test_ctx_xmit {
	test_start "test_ctx on lwt xmit"
	install_test xmit test_ctx
	ping -c 3 $IPVETH1 \|\| {
	failure "test_ctx xmit: packets are dropped"
	}
	match_trace "$(get_trace)" "
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX" \|\| exit 1
	remove_prog xmit
	}

	function test_ctx_out {
	test_start "test_ctx on lwt out"
	install_test out test_ctx
	ping -c 3 $IPVETH1 \|\| {
	failure "test_ctx out: packets are dropped"
	}
	match_trace "$(get_trace)" "
	len 84 hash 0 protocol 0
	cb 1234 ingress_ifindex 0 ifindex 0
	len 84 hash 0 protocol 0
	cb 1234 ingress_ifindex 0 ifindex 0
	len 84 hash 0 protocol 0
	cb 1234 ingress_ifindex 0 ifindex 0" \|\| exit 1
	remove_prog out
	}

	function test_ctx_in {
	test_start "test_ctx on lwt in"
	install_test in test_ctx
	ping -c 3 $IP_LOCAL \|\| {
	failure "test_ctx out: packets are dropped"
	}
	# We will both request & reply packets as the packets will
	# be from $IP_LOCAL => $IP_LOCAL
	match_trace "$(get_trace)" "
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1
	len 84 hash 0 protocol 8
	cb 1234 ingress_ifindex 1 ifindex 1" \|\| exit 1
	remove_prog in
	}

	function test_data {
	test_start "test_data on lwt $1"
	install_test $1 test_data
	ping -c 3 $IPVETH1 \|\| {
	failure "test_data ${1}: packets are dropped"
	}
	match_trace "$(get_trace)" "
	src: 1fea8c0 dst: 2fea8c0
	src: 1fea8c0 dst: 2fea8c0
	src: 1fea8c0 dst: 2fea8c0" \|\| exit 1
	remove_prog $1
	}

	function test_data_in {
	test_start "test_data on lwt in"
	install_test in test_data
	ping -c 3 $IP_LOCAL \|\| {
	failure "test_data in: packets are dropped"
	}
	# We will both request & reply packets as the packets will
	# be from $IP_LOCAL => $IP_LOCAL
	match_trace "$(get_trace)" "
	src: 163a8c0 dst: 163a8c0
	src: 163a8c0 dst: 163a8c0
	src: 163a8c0 dst: 163a8c0
	src: 163a8c0 dst: 163a8c0
	src: 163a8c0 dst: 163a8c0
	src: 163a8c0 dst: 163a8c0" \|\| exit 1
	remove_prog in
	}

	function test_cb {
	test_start "test_cb on lwt $1"
	install_test $1 test_cb
	ping -c 3 $IPVETH1 \|\| {
	failure "test_cb ${1}: packets are dropped"
	}
	match_trace "$(get_trace)" "
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0" \|\| exit 1
	remove_prog $1
	}

	function test_cb_in {
	test_start "test_cb on lwt in"
	install_test in test_cb
	ping -c 3 $IP_LOCAL \|\| {
	failure "test_cb in: packets are dropped"
	}
	# We will both request & reply packets as the packets will
	# be from $IP_LOCAL => $IP_LOCAL
	match_trace "$(get_trace)" "
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0
	cb0: 0 cb1: 0 cb2: 0
	cb3: 0 cb4: 0" \|\| exit 1
	remove_prog in
	}

	function test_drop_all {
	test_start "test_drop_all on lwt $1"
	install_test $1 drop_all
	ping -c 3 $IPVETH1 && {
	failure "test_drop_all ${1}: Unexpected success of ping"
	}
	match_trace "$(get_trace)" "
	dropping with: 2
	dropping with: 2
	dropping with: 2" \|\| exit 1
	remove_prog $1
	}

	function test_drop_all_in {
	test_start "test_drop_all on lwt in"
	install_test in drop_all
	ping -c 3 $IP_LOCAL && {
	failure "test_drop_all in: Unexpected success of ping"
	}
	match_trace "$(get_trace)" "
	dropping with: 2
	dropping with: 2
	dropping with: 2" \|\| exit 1
	remove_prog in
	}

	function test_push_ll_and_redirect {
	test_start "test_push_ll_and_redirect on lwt xmit"
	install_test xmit push_ll_and_redirect
	ping -c 3 $IPVETH1 \|\| {
	failure "Redirected packets appear to be dropped"
	}
	match_trace "$(get_trace)" "
	redirected to $DST_IFINDEX
	redirected to $DST_IFINDEX
	redirected to $DST_IFINDEX" \|\| exit 1
	remove_prog xmit
	}

	function test_no_l2_and_redirect {
	test_start "test_no_l2_and_redirect on lwt xmit"
	install_test xmit fill_garbage_and_redirect
	ping -c 3 $IPVETH1 && {
	failure "Unexpected success despite lack of L2 header"
	}
	match_trace "$(get_trace)" "
	redirected to $DST_IFINDEX
	redirected to $DST_IFINDEX
	redirected to $DST_IFINDEX" \|\| exit 1
	remove_prog xmit
	}

	function test_rewrite {
	test_start "test_rewrite on lwt xmit"
	install_test xmit test_rewrite
	ping -c 3 $IPVETH1 \|\| {
	failure "Rewritten packets appear to be dropped"
	}
	match_trace "$(get_trace)" "
	out: rewriting from 2fea8c0 to 3fea8c0
	out: rewriting from 2fea8c0 to 3fea8c0
	out: rewriting from 2fea8c0 to 3fea8c0" \|\| exit 1
	remove_prog out
	}

	function test_fill_garbage {
	test_start "test_fill_garbage on lwt xmit"
	install_test xmit fill_garbage
	ping -c 3 $IPVETH1 && {
	failure "test_drop_all ${1}: Unexpected success of ping"
	}
	match_trace "$(get_trace)" "
	Set initial 96 bytes of header to FF
	Set initial 96 bytes of header to FF
	Set initial 96 bytes of header to FF" \|\| exit 1
	remove_prog xmit
	}

	function test_netperf_nop {
	test_start "test_netperf_nop on lwt xmit"
	install_test xmit nop
	netperf -H $IPVETH1 -t TCP_STREAM \|\| {
	failure "packets appear to be dropped"
	}
	match_trace "$(get_trace)" ""\|\| exit 1
	remove_prog xmit
	}

	function test_netperf_redirect {
	test_start "test_netperf_redirect on lwt xmit"
	install_test xmit push_ll_and_redirect_silent
	netperf -H $IPVETH1 -t TCP_STREAM \|\| {
	failure "Rewritten packets appear to be dropped"
	}
	match_trace "$(get_trace)" ""\|\| exit 1
	remove_prog xmit
	}

	cleanup
	setup_one_veth $NS1 $VETH0 $VETH1 $IPVETH0 $IPVETH1 $IPVETH1b
	setup_one_veth $NS2 $VETH2 $VETH3 $IPVETH2 $IPVETH3
	ip netns exec $NS1 netserver
	echo 1 > ${TRACE_ROOT}/tracing_on

	DST_MAC=$(lookup_mac $VETH1 $NS1)
	SRC_MAC=$(lookup_mac $VETH0)
	DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex)

	CLANG_OPTS="-O2 -target bpf -I ../include/"
	CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX"
	clang $CLANG_OPTS -c test_lwt_bpf.c -o test_lwt_bpf.o

	test_ctx_xmit
	test_ctx_out
	test_ctx_in
	test_data "xmit"
	test_data "out"
	test_data_in
	test_cb "xmit"
	test_cb "out"
	test_cb_in
	test_drop_all "xmit"
	test_drop_all "out"
	test_drop_all_in
	test_rewrite
	test_push_ll_and_redirect
	test_no_l2_and_redirect
	test_fill_garbage
	test_netperf_nop
	test_netperf_redirect

	cleanup
	echo 0 > ${TRACE_ROOT}/tracing_on
	exit 0