306 lines
7.5 KiB
Bash
306 lines
7.5 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# In-place tunneling
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BPF_FILE="test_tc_tunnel.bpf.o"
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# must match the port that the bpf program filters on
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readonly port=8000
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readonly ns_prefix="ns-$$-"
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readonly ns1="${ns_prefix}1"
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readonly ns2="${ns_prefix}2"
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readonly ns1_v4=192.168.1.1
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readonly ns2_v4=192.168.1.2
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readonly ns1_v6=fd::1
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readonly ns2_v6=fd::2
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# Must match port used by bpf program
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readonly udpport=5555
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# MPLSoverUDP
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readonly mplsudpport=6635
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readonly mplsproto=137
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readonly infile="$(mktemp)"
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readonly outfile="$(mktemp)"
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setup() {
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ip netns add "${ns1}"
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ip netns add "${ns2}"
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ip link add dev veth1 mtu 1500 netns "${ns1}" type veth \
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peer name veth2 mtu 1500 netns "${ns2}"
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ip netns exec "${ns1}" ethtool -K veth1 tso off
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ip -netns "${ns1}" link set veth1 up
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ip -netns "${ns2}" link set veth2 up
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ip -netns "${ns1}" -4 addr add "${ns1_v4}/24" dev veth1
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ip -netns "${ns2}" -4 addr add "${ns2_v4}/24" dev veth2
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ip -netns "${ns1}" -6 addr add "${ns1_v6}/64" dev veth1 nodad
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ip -netns "${ns2}" -6 addr add "${ns2_v6}/64" dev veth2 nodad
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# clamp route to reserve room for tunnel headers
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ip -netns "${ns1}" -4 route flush table main
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ip -netns "${ns1}" -6 route flush table main
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ip -netns "${ns1}" -4 route add "${ns2_v4}" mtu 1450 dev veth1
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ip -netns "${ns1}" -6 route add "${ns2_v6}" mtu 1430 dev veth1
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sleep 1
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dd if=/dev/urandom of="${infile}" bs="${datalen}" count=1 status=none
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}
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cleanup() {
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ip netns del "${ns2}"
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ip netns del "${ns1}"
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if [[ -f "${outfile}" ]]; then
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rm "${outfile}"
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fi
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if [[ -f "${infile}" ]]; then
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rm "${infile}"
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fi
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if [[ -n $server_pid ]]; then
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kill $server_pid 2> /dev/null
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fi
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}
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server_listen() {
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ip netns exec "${ns2}" nc "${netcat_opt}" -l "${port}" > "${outfile}" &
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server_pid=$!
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sleep 0.2
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}
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client_connect() {
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ip netns exec "${ns1}" timeout 2 nc "${netcat_opt}" -w 1 "${addr2}" "${port}" < "${infile}"
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echo $?
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}
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verify_data() {
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wait "${server_pid}"
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server_pid=
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# sha1sum returns two fields [sha1] [filepath]
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# convert to bash array and access first elem
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insum=($(sha1sum ${infile}))
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outsum=($(sha1sum ${outfile}))
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if [[ "${insum[0]}" != "${outsum[0]}" ]]; then
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echo "data mismatch"
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exit 1
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fi
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}
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set -e
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# no arguments: automated test, run all
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if [[ "$#" -eq "0" ]]; then
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echo "ipip"
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$0 ipv4 ipip none 100
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echo "ip6ip6"
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$0 ipv6 ip6tnl none 100
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echo "sit"
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$0 ipv6 sit none 100
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echo "ip4 vxlan"
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$0 ipv4 vxlan eth 2000
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echo "ip6 vxlan"
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$0 ipv6 ip6vxlan eth 2000
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for mac in none mpls eth ; do
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echo "ip gre $mac"
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$0 ipv4 gre $mac 100
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echo "ip6 gre $mac"
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$0 ipv6 ip6gre $mac 100
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echo "ip gre $mac gso"
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$0 ipv4 gre $mac 2000
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echo "ip6 gre $mac gso"
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$0 ipv6 ip6gre $mac 2000
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echo "ip udp $mac"
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$0 ipv4 udp $mac 100
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echo "ip6 udp $mac"
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$0 ipv6 ip6udp $mac 100
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echo "ip udp $mac gso"
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$0 ipv4 udp $mac 2000
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echo "ip6 udp $mac gso"
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$0 ipv6 ip6udp $mac 2000
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done
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echo "OK. All tests passed"
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exit 0
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fi
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if [[ "$#" -ne "4" ]]; then
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echo "Usage: $0"
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echo " or: $0 <ipv4|ipv6> <tuntype> <none|mpls|eth> <data_len>"
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exit 1
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fi
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case "$1" in
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"ipv4")
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readonly addr1="${ns1_v4}"
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readonly addr2="${ns2_v4}"
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readonly ipproto=4
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readonly netcat_opt=-${ipproto}
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readonly foumod=fou
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readonly foutype=ipip
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readonly fouproto=4
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readonly fouproto_mpls=${mplsproto}
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readonly gretaptype=gretap
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;;
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"ipv6")
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readonly addr1="${ns1_v6}"
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readonly addr2="${ns2_v6}"
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readonly ipproto=6
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readonly netcat_opt=-${ipproto}
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readonly foumod=fou6
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readonly foutype=ip6tnl
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readonly fouproto="41 -6"
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readonly fouproto_mpls="${mplsproto} -6"
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readonly gretaptype=ip6gretap
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;;
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*)
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echo "unknown arg: $1"
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exit 1
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;;
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esac
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readonly tuntype=$2
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readonly mac=$3
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readonly datalen=$4
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echo "encap ${addr1} to ${addr2}, type ${tuntype}, mac ${mac} len ${datalen}"
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trap cleanup EXIT
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setup
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# basic communication works
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echo "test basic connectivity"
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server_listen
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client_connect
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verify_data
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# clientside, insert bpf program to encap all TCP to port ${port}
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# client can no longer connect
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ip netns exec "${ns1}" tc qdisc add dev veth1 clsact
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ip netns exec "${ns1}" tc filter add dev veth1 egress \
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bpf direct-action object-file ${BPF_FILE} \
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section "encap_${tuntype}_${mac}"
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echo "test bpf encap without decap (expect failure)"
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server_listen
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! client_connect
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if [[ "$tuntype" =~ "udp" ]]; then
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# Set up fou tunnel.
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ttype="${foutype}"
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targs="encap fou encap-sport auto encap-dport $udpport"
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# fou may be a module; allow this to fail.
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modprobe "${foumod}" ||true
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if [[ "$mac" == "mpls" ]]; then
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dport=${mplsudpport}
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dproto=${fouproto_mpls}
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tmode="mode any ttl 255"
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else
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dport=${udpport}
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dproto=${fouproto}
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fi
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ip netns exec "${ns2}" ip fou add port $dport ipproto ${dproto}
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targs="encap fou encap-sport auto encap-dport $dport"
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elif [[ "$tuntype" =~ "gre" && "$mac" == "eth" ]]; then
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ttype=$gretaptype
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elif [[ "$tuntype" =~ "vxlan" && "$mac" == "eth" ]]; then
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ttype="vxlan"
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targs="id 1 dstport 8472 udp6zerocsumrx"
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else
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ttype=$tuntype
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targs=""
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fi
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# tunnel address family differs from inner for SIT
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if [[ "${tuntype}" == "sit" ]]; then
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link_addr1="${ns1_v4}"
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link_addr2="${ns2_v4}"
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else
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link_addr1="${addr1}"
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link_addr2="${addr2}"
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fi
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# serverside, insert decap module
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# server is still running
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# client can connect again
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ip netns exec "${ns2}" ip link add name testtun0 type "${ttype}" \
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${tmode} remote "${link_addr1}" local "${link_addr2}" $targs
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expect_tun_fail=0
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if [[ "$tuntype" == "ip6udp" && "$mac" == "mpls" ]]; then
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# No support for MPLS IPv6 fou tunnel; expect failure.
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expect_tun_fail=1
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elif [[ "$tuntype" =~ "udp" && "$mac" == "eth" ]]; then
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# No support for TEB fou tunnel; expect failure.
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expect_tun_fail=1
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elif [[ "$tuntype" =~ (gre|vxlan) && "$mac" == "eth" ]]; then
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# Share ethernet address between tunnel/veth2 so L2 decap works.
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ethaddr=$(ip netns exec "${ns2}" ip link show veth2 | \
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awk '/ether/ { print $2 }')
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ip netns exec "${ns2}" ip link set testtun0 address $ethaddr
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elif [[ "$mac" == "mpls" ]]; then
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modprobe mpls_iptunnel ||true
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modprobe mpls_gso ||true
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ip netns exec "${ns2}" sysctl -qw net.mpls.platform_labels=65536
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ip netns exec "${ns2}" ip -f mpls route add 1000 dev lo
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ip netns exec "${ns2}" ip link set lo up
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ip netns exec "${ns2}" sysctl -qw net.mpls.conf.testtun0.input=1
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ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.lo.rp_filter=0
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fi
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# Because packets are decapped by the tunnel they arrive on testtun0 from
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# the IP stack perspective. Ensure reverse path filtering is disabled
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# otherwise we drop the TCP SYN as arriving on testtun0 instead of the
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# expected veth2 (veth2 is where 192.168.1.2 is configured).
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ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.all.rp_filter=0
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# rp needs to be disabled for both all and testtun0 as the rp value is
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# selected as the max of the "all" and device-specific values.
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ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.testtun0.rp_filter=0
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ip netns exec "${ns2}" ip link set dev testtun0 up
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if [[ "$expect_tun_fail" == 1 ]]; then
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# This tunnel mode is not supported, so we expect failure.
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echo "test bpf encap with tunnel device decap (expect failure)"
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! client_connect
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else
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echo "test bpf encap with tunnel device decap"
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client_connect
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verify_data
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server_listen
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fi
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# bpf_skb_net_shrink does not take tunnel flags yet, cannot update L3.
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if [[ "${tuntype}" == "sit" ]]; then
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echo OK
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exit 0
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fi
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# serverside, use BPF for decap
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ip netns exec "${ns2}" ip link del dev testtun0
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ip netns exec "${ns2}" tc qdisc add dev veth2 clsact
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ip netns exec "${ns2}" tc filter add dev veth2 ingress \
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bpf direct-action object-file ${BPF_FILE} section decap
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echo "test bpf encap with bpf decap"
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client_connect
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verify_data
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echo OK
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