| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # In-place tunneling |
| |
| # 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 "${ns2_v4}" mtu 1458 dev veth1 |
| ip -netns "${ns1}" -6 route add "${ns2_v6}" mtu 1438 dev veth1 |
| |
| sleep 1 |
| |
| dd if=/dev/urandom of="${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 "${infile}" |
| fi |
| } |
| |
| server_listen() { |
| ip netns exec "${ns2}" nc "${netcat_opt}" -l -p "${port}" > "${outfile}" & |
| server_pid=$! |
| sleep 0.2 |
| } |
| |
| client_connect() { |
| ip netns exec "${ns1}" timeout 2 nc "${netcat_opt}" -w 1 "${addr2}" "${port}" < "${infile}" |
| echo $? |
| } |
| |
| verify_data() { |
| wait "${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]}" != "${outsum[0]}" ]]; then |
| echo "data mismatch" |
| exit 1 |
| fi |
| } |
| |
| set -e |
| |
| # no arguments: automated test, run all |
| if [[ "$#" -eq "0" ]]; then |
| echo "ipip" |
| $0 ipv4 ipip none 100 |
| |
| echo "ip6ip6" |
| $0 ipv6 ip6tnl none 100 |
| |
| echo "sit" |
| $0 ipv6 sit none 100 |
| |
| 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 |
| 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 "${ns1}" tc filter add dev veth1 egress \ |
| bpf direct-action object-file ./test_tc_tunnel.o \ |
| section "encap_${tuntype}_${mac}" |
| echo "test bpf encap without decap (expect failure)" |
| server_listen |
| ! client_connect |
| |
| if [[ "$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 |
| 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}" |
| 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" && "$mac" == "eth" ]]; then |
| # Share ethernet address between tunnel/veth2 so L2 decap works. |
| ethaddr=$(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 [[ "$expect_tun_fail" == 1 ]]; then |
| # This tunnel mode is not supported, so we expect failure. |
| echo "test bpf encap with tunnel device decap (expect failure)" |
| ! client_connect |
| else |
| echo "test bpf encap with tunnel device decap" |
| client_connect |
| verify_data |
| server_listen |
| fi |
| |
| # bpf_skb_net_shrink does not take tunnel flags yet, cannot update L3. |
| if [[ "${tuntype}" == "sit" ]]; then |
| echo OK |
| exit 0 |
| 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 ./test_tc_tunnel.o section decap |
| echo "test bpf encap with bpf decap" |
| client_connect |
| verify_data |
| |
| echo OK |
