selftests/bpf: Remove test_tc_tunnel.sh

# Order correspond to 'make run_tests' order

TEST_PROGS := test_kmod.sh \

	test_lirc_mode2.sh \

	test_tc_tunnel.sh \

	test_tc_edt.sh \

	test_xdping.sh \

	test_bpftool_build.sh \

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

#

# In-place tunneling

BPF_FILE="test_tc_tunnel.bpf.o"

# must match the port that the bpf program filters on

readonly port=8000

readonly ns_prefix="ns-$$-"

readonly ns1="${ns_prefix}1"

readonly ns2="${ns_prefix}2"

readonly ns1_v4=192.168.1.1

readonly ns2_v4=192.168.1.2

readonly ns1_v6=fd::1

readonly ns2_v6=fd::2

# Must match port used by bpf program

readonly udpport=5555

# MPLSoverUDP

readonly mplsudpport=6635

readonly mplsproto=137

readonly infile="$(mktemp)"

readonly outfile="$(mktemp)"

setup() {

	ip netns add "${ns1}"

	ip netns add "${ns2}"

	ip link add dev veth1 mtu 1500 netns "${ns1}" type veth \

	      peer name veth2 mtu 1500 netns "${ns2}"

	ip netns exec "${ns1}" ethtool -K veth1 tso off

	ip -netns "${ns1}" link set veth1 up

	ip -netns "${ns2}" link set veth2 up

	ip -netns "${ns1}" -4 addr add "${ns1_v4}/24" dev veth1

	ip -netns "${ns2}" -4 addr add "${ns2_v4}/24" dev veth2

	ip -netns "${ns1}" -6 addr add "${ns1_v6}/64" dev veth1 nodad

	ip -netns "${ns2}" -6 addr add "${ns2_v6}/64" dev veth2 nodad

	# clamp route to reserve room for tunnel headers

	ip -netns "${ns1}" -4 route flush table main

	ip -netns "${ns1}" -6 route flush table main

	ip -netns "${ns1}" -4 route add "${ns2_v4}" mtu 1450 dev veth1

	ip -netns "${ns1}" -6 route add "${ns2_v6}" mtu 1430 dev veth1

	sleep 1

	dd if=/dev/urandom of="${infile}" bs="${datalen}" count=1 status=none

}

cleanup() {

	ip netns del "${ns2}"

	ip netns del "${ns1}"

	if [[ -f "${outfile}" ]]; then

		rm "${outfile}"

	fi

	if [[ -f "${infile}" ]]; then

		rm "${infile}"

	fi

	if [[ -n $server_pid ]]; then

		kill $server_pid 2> /dev/null

	fi

}

server_listen() {

	ip netns exec "${ns2}" nc "${netcat_opt}" -l "${port}" > "${outfile}" &

	server_pid=$!

}

client_connect() {

	ip netns exec "${ns1}" timeout 2 nc "${netcat_opt}" -w 1 "${addr2}" "${port}" < "${infile}"

	echo $?

}

verify_data() {

	wait "${server_pid}"

	server_pid=

	# sha1sum returns two fields [sha1] [filepath]

	# convert to bash array and access first elem

	insum=($(sha1sum ${infile}))

	outsum=($(sha1sum ${outfile}))

	if [[ "${insum[0]}" != "${outsum[0]}" ]]; then

		echo "data mismatch"

		exit 1

	fi

}

wait_for_port() {

	for i in $(seq 20); do

		if ip netns exec "${ns2}" ss ${2:--4}OHntl | grep -q "$1"; then

			return 0

		fi

		sleep 0.1

	done

	return 1

}

set -e

# no arguments: automated test, run all

if [[ "$#" -eq "0" ]]; then

	echo "ipip"

	$0 ipv4 ipip none 100

	echo "ipip6"

	$0 ipv4 ipip6 none 100

	echo "ip6ip6"

	$0 ipv6 ip6tnl none 100

	echo "sit"

	$0 ipv6 sit none 100

	echo "ip4 vxlan"

	$0 ipv4 vxlan eth 2000

	echo "ip6 vxlan"

	$0 ipv6 ip6vxlan eth 2000

	for mac in none mpls eth ; do

		echo "ip gre $mac"

		$0 ipv4 gre $mac 100

		echo "ip6 gre $mac"

		$0 ipv6 ip6gre $mac 100

		echo "ip gre $mac gso"

		$0 ipv4 gre $mac 2000

		echo "ip6 gre $mac gso"

		$0 ipv6 ip6gre $mac 2000

		echo "ip udp $mac"

		$0 ipv4 udp $mac 100

		echo "ip6 udp $mac"

		$0 ipv6 ip6udp $mac 100

		echo "ip udp $mac gso"

		$0 ipv4 udp $mac 2000

		echo "ip6 udp $mac gso"

		$0 ipv6 ip6udp $mac 2000

	done

	echo "OK. All tests passed"

	exit 0

fi

if [[ "$#" -ne "4" ]]; then

	echo "Usage: $0"

	echo "   or: $0 <ipv4|ipv6> <tuntype> <none|mpls|eth> <data_len>"

	exit 1

fi

case "$1" in

"ipv4")

	readonly addr1="${ns1_v4}"

	readonly addr2="${ns2_v4}"

	readonly ipproto=4

	readonly netcat_opt=-${ipproto}

	readonly foumod=fou

	readonly foutype=ipip

	readonly fouproto=4

	readonly fouproto_mpls=${mplsproto}

	readonly gretaptype=gretap

	;;

"ipv6")

	readonly addr1="${ns1_v6}"

	readonly addr2="${ns2_v6}"

	readonly ipproto=6

	readonly netcat_opt=-${ipproto}

	readonly foumod=fou6

	readonly foutype=ip6tnl

	readonly fouproto="41 -6"

	readonly fouproto_mpls="${mplsproto} -6"

	readonly gretaptype=ip6gretap

	;;

*)

	echo "unknown arg: $1"

	exit 1

	;;

esac

readonly tuntype=$2

readonly mac=$3

readonly datalen=$4

echo "encap ${addr1} to ${addr2}, type ${tuntype}, mac ${mac} len ${datalen}"

trap cleanup EXIT

setup

# basic communication works

echo "test basic connectivity"

server_listen

wait_for_port ${port} ${netcat_opt}

client_connect

verify_data

# clientside, insert bpf program to encap all TCP to port ${port}

# client can no longer connect

ip netns exec "${ns1}" tc qdisc add dev veth1 clsact

ip netns exec "${ns1}" tc filter add dev veth1 egress \

	bpf direct-action object-file ${BPF_FILE} \

	section "encap_${tuntype}_${mac}"

echo "test bpf encap without decap (expect failure)"

server_listen

wait_for_port ${port} ${netcat_opt}

! client_connect

if [[ "$tuntype" =~ "udp" ]]; then

	# Set up fou tunnel.

	ttype="${foutype}"

	targs="encap fou encap-sport auto encap-dport $udpport"

	# fou may be a module; allow this to fail.

	modprobe "${foumod}" ||true

	if [[ "$mac" == "mpls" ]]; then

		dport=${mplsudpport}

		dproto=${fouproto_mpls}

		tmode="mode any ttl 255"

	else

		dport=${udpport}

		dproto=${fouproto}

	fi

	ip netns exec "${ns2}" ip fou add port $dport ipproto ${dproto}

	targs="encap fou encap-sport auto encap-dport $dport"

elif [[ "$tuntype" =~ "gre" && "$mac" == "eth" ]]; then

	ttype=$gretaptype

elif [[ "$tuntype" =~ "vxlan" && "$mac" == "eth" ]]; then

	ttype="vxlan"

	targs="id 1 dstport 8472 udp6zerocsumrx"

elif [[ "$tuntype" == "ipip6" ]]; then

	ttype="ip6tnl"

	targs=""

else

	ttype=$tuntype

	targs=""

fi

# tunnel address family differs from inner for SIT

if [[ "${tuntype}" == "sit" ]]; then

	link_addr1="${ns1_v4}"

	link_addr2="${ns2_v4}"

elif [[ "${tuntype}" == "ipip6" ]]; then

	link_addr1="${ns1_v6}"

	link_addr2="${ns2_v6}"

else

	link_addr1="${addr1}"

	link_addr2="${addr2}"

fi

# serverside, insert decap module

# server is still running

# client can connect again

ip netns exec "${ns2}" ip link add name testtun0 type "${ttype}" \

	${tmode} remote "${link_addr1}" local "${link_addr2}" $targs

expect_tun_fail=0

if [[ "$tuntype" == "ip6udp" && "$mac" == "mpls" ]]; then

	# No support for MPLS IPv6 fou tunnel; expect failure.

	expect_tun_fail=1

elif [[ "$tuntype" =~ "udp" && "$mac" == "eth" ]]; then

	# No support for TEB fou tunnel; expect failure.

	expect_tun_fail=1

elif [[ "$tuntype" =~ (gre|vxlan) && "$mac" == "eth" ]]; then

	# Share ethernet address between tunnel/veth2 so L2 decap works.

	ethaddr=$(ip netns exec "${ns2}" ip link show veth2 | \

		  awk '/ether/ { print $2 }')

	ip netns exec "${ns2}" ip link set testtun0 address $ethaddr

elif [[ "$mac" == "mpls" ]]; then

	modprobe mpls_iptunnel ||true

	modprobe mpls_gso ||true

	ip netns exec "${ns2}" sysctl -qw net.mpls.platform_labels=65536

	ip netns exec "${ns2}" ip -f mpls route add 1000 dev lo

	ip netns exec "${ns2}" ip link set lo up

	ip netns exec "${ns2}" sysctl -qw net.mpls.conf.testtun0.input=1

	ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.lo.rp_filter=0

fi

# Because packets are decapped by the tunnel they arrive on testtun0 from

# the IP stack perspective.  Ensure reverse path filtering is disabled

# otherwise we drop the TCP SYN as arriving on testtun0 instead of the

# expected veth2 (veth2 is where 192.168.1.2 is configured).

ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.all.rp_filter=0

# rp needs to be disabled for both all and testtun0 as the rp value is

# selected as the max of the "all" and device-specific values.

ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.testtun0.rp_filter=0

ip netns exec "${ns2}" ip link set dev testtun0 up

if [[ "$expect_tun_fail" == 1 ]]; then

	# This tunnel mode is not supported, so we expect failure.

	echo "test bpf encap with tunnel device decap (expect failure)"

	! client_connect

else

	echo "test bpf encap with tunnel device decap"

	client_connect

	verify_data

	server_listen

	wait_for_port ${port} ${netcat_opt}

fi

# serverside, use BPF for decap

ip netns exec "${ns2}" ip link del dev testtun0

ip netns exec "${ns2}" tc qdisc add dev veth2 clsact

ip netns exec "${ns2}" tc filter add dev veth2 ingress \

	bpf direct-action object-file ${BPF_FILE} section decap

echo "test bpf encap with bpf decap"

client_connect

verify_data

echo OK