76 lines
1.6 KiB
Bash
76 lines
1.6 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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# 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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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 "${ns1}" link set veth1 up
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ip -netns "${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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sleep 1
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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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}
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server_listen() {
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ip netns exec "${ns2}" nc -l -p "${port}" &
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sleep 0.2
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}
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client_connect() {
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ip netns exec "${ns1}" nc -z -w 1 "${ns2_v4}" "${port}"
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echo $?
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}
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set -e
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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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# 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 "${ns1}" tc filter add dev veth1 egress \
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bpf direct-action object-file ./test_tc_tunnel.o section encap
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echo "test bpf encap without decap (expect failure)"
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server_listen
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! client_connect
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# serverside, insert decap module
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# server is still running
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# client can connect again
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ip netns exec "${ns2}" ip link add dev testtun0 type ipip \
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remote "${ns1_v4}" local "${ns2_v4}"
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ip netns exec "${ns2}" ip link set dev testtun0 up
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echo "test bpf encap with tunnel device decap"
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client_connect
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echo OK
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