383 lines
9.7 KiB
Bash
Executable File
383 lines
9.7 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# L2TPv3 tunnel between 2 hosts
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#
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# host-1 | router | host-2
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# | |
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# lo l2tp | | l2tp lo
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# 172.16.101.1 172.16.1.1 | | 172.16.1.2 172.16.101.2
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# fc00:101::1 fc00:1::1 | | fc00:1::2 fc00:101::2
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# | |
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# eth0 | | eth0
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# 10.1.1.1 | | 10.1.2.1
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# 2001:db8:1::1 | | 2001:db8:2::1
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VERBOSE=0
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PAUSE_ON_FAIL=no
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which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
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################################################################################
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#
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log_test()
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{
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local rc=$1
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local expected=$2
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local msg="$3"
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if [ ${rc} -eq ${expected} ]; then
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printf "TEST: %-60s [ OK ]\n" "${msg}"
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nsuccess=$((nsuccess+1))
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else
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ret=1
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nfail=$((nfail+1))
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printf "TEST: %-60s [FAIL]\n" "${msg}"
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if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
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echo
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echo "hit enter to continue, 'q' to quit"
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read a
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[ "$a" = "q" ] && exit 1
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fi
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fi
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}
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run_cmd()
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{
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local ns
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local cmd
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local out
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local rc
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ns="$1"
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shift
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cmd="$*"
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if [ "$VERBOSE" = "1" ]; then
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printf " COMMAND: $cmd\n"
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fi
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out=$(eval ip netns exec ${ns} ${cmd} 2>&1)
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rc=$?
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if [ "$VERBOSE" = "1" -a -n "$out" ]; then
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echo " $out"
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fi
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[ "$VERBOSE" = "1" ] && echo
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return $rc
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}
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################################################################################
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# create namespaces and interconnects
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create_ns()
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{
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local ns=$1
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local addr=$2
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local addr6=$3
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[ -z "${addr}" ] && addr="-"
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[ -z "${addr6}" ] && addr6="-"
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ip netns add ${ns}
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ip -netns ${ns} link set lo up
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if [ "${addr}" != "-" ]; then
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ip -netns ${ns} addr add dev lo ${addr}
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fi
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if [ "${addr6}" != "-" ]; then
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ip -netns ${ns} -6 addr add dev lo ${addr6}
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fi
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ip -netns ${ns} ro add unreachable default metric 8192
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ip -netns ${ns} -6 ro add unreachable default metric 8192
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ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=1
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ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
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ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
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ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
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ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0
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}
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# create veth pair to connect namespaces and apply addresses.
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connect_ns()
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{
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local ns1=$1
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local ns1_dev=$2
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local ns1_addr=$3
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local ns1_addr6=$4
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local ns2=$5
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local ns2_dev=$6
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local ns2_addr=$7
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local ns2_addr6=$8
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ip -netns ${ns1} li add ${ns1_dev} type veth peer name tmp
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ip -netns ${ns1} li set ${ns1_dev} up
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ip -netns ${ns1} li set tmp netns ${ns2} name ${ns2_dev}
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ip -netns ${ns2} li set ${ns2_dev} up
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if [ "${ns1_addr}" != "-" ]; then
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ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr}
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ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr}
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fi
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if [ "${ns1_addr6}" != "-" ]; then
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ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr6}
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ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr6}
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fi
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}
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################################################################################
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# test setup
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cleanup()
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{
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local ns
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for ns in host-1 host-2 router
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do
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ip netns del ${ns} 2>/dev/null
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done
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}
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setup_l2tp_ipv4()
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{
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#
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# configure l2tpv3 tunnel on host-1
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#
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ip -netns host-1 l2tp add tunnel tunnel_id 1041 peer_tunnel_id 1042 \
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encap ip local 10.1.1.1 remote 10.1.2.1
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ip -netns host-1 l2tp add session name l2tp4 tunnel_id 1041 \
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session_id 1041 peer_session_id 1042
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ip -netns host-1 link set dev l2tp4 up
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ip -netns host-1 addr add dev l2tp4 172.16.1.1 peer 172.16.1.2
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#
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# configure l2tpv3 tunnel on host-2
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#
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ip -netns host-2 l2tp add tunnel tunnel_id 1042 peer_tunnel_id 1041 \
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encap ip local 10.1.2.1 remote 10.1.1.1
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ip -netns host-2 l2tp add session name l2tp4 tunnel_id 1042 \
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session_id 1042 peer_session_id 1041
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ip -netns host-2 link set dev l2tp4 up
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ip -netns host-2 addr add dev l2tp4 172.16.1.2 peer 172.16.1.1
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#
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# add routes to loopback addresses
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#
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ip -netns host-1 ro add 172.16.101.2/32 via 172.16.1.2
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ip -netns host-2 ro add 172.16.101.1/32 via 172.16.1.1
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}
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setup_l2tp_ipv6()
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{
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#
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# configure l2tpv3 tunnel on host-1
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#
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ip -netns host-1 l2tp add tunnel tunnel_id 1061 peer_tunnel_id 1062 \
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encap ip local 2001:db8:1::1 remote 2001:db8:2::1
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ip -netns host-1 l2tp add session name l2tp6 tunnel_id 1061 \
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session_id 1061 peer_session_id 1062
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ip -netns host-1 link set dev l2tp6 up
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ip -netns host-1 addr add dev l2tp6 fc00:1::1 peer fc00:1::2
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#
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# configure l2tpv3 tunnel on host-2
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#
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ip -netns host-2 l2tp add tunnel tunnel_id 1062 peer_tunnel_id 1061 \
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encap ip local 2001:db8:2::1 remote 2001:db8:1::1
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ip -netns host-2 l2tp add session name l2tp6 tunnel_id 1062 \
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session_id 1062 peer_session_id 1061
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ip -netns host-2 link set dev l2tp6 up
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ip -netns host-2 addr add dev l2tp6 fc00:1::2 peer fc00:1::1
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#
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# add routes to loopback addresses
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#
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ip -netns host-1 -6 ro add fc00:101::2/128 via fc00:1::2
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ip -netns host-2 -6 ro add fc00:101::1/128 via fc00:1::1
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}
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setup()
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{
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# start clean
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cleanup
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set -e
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create_ns host-1 172.16.101.1/32 fc00:101::1/128
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create_ns host-2 172.16.101.2/32 fc00:101::2/128
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create_ns router
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connect_ns host-1 eth0 10.1.1.1/24 2001:db8:1::1/64 \
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router eth1 10.1.1.2/24 2001:db8:1::2/64
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connect_ns host-2 eth0 10.1.2.1/24 2001:db8:2::1/64 \
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router eth2 10.1.2.2/24 2001:db8:2::2/64
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ip -netns host-1 ro add 10.1.2.0/24 via 10.1.1.2
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ip -netns host-1 -6 ro add 2001:db8:2::/64 via 2001:db8:1::2
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ip -netns host-2 ro add 10.1.1.0/24 via 10.1.2.2
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ip -netns host-2 -6 ro add 2001:db8:1::/64 via 2001:db8:2::2
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setup_l2tp_ipv4
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setup_l2tp_ipv6
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set +e
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}
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setup_ipsec()
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{
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#
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# IPv4
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#
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run_cmd host-1 ip xfrm policy add \
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src 10.1.1.1 dst 10.1.2.1 dir out \
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tmpl proto esp mode transport
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run_cmd host-1 ip xfrm policy add \
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src 10.1.2.1 dst 10.1.1.1 dir in \
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tmpl proto esp mode transport
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run_cmd host-2 ip xfrm policy add \
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src 10.1.1.1 dst 10.1.2.1 dir in \
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tmpl proto esp mode transport
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run_cmd host-2 ip xfrm policy add \
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src 10.1.2.1 dst 10.1.1.1 dir out \
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tmpl proto esp mode transport
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ip -netns host-1 xfrm state add \
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src 10.1.1.1 dst 10.1.2.1 \
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spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-1 xfrm state add \
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src 10.1.2.1 dst 10.1.1.1 \
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spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-2 xfrm state add \
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src 10.1.1.1 dst 10.1.2.1 \
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spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-2 xfrm state add \
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src 10.1.2.1 dst 10.1.1.1 \
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spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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#
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# IPV6
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#
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run_cmd host-1 ip -6 xfrm policy add \
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src 2001:db8:1::1 dst 2001:db8:2::1 dir out \
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tmpl proto esp mode transport
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run_cmd host-1 ip -6 xfrm policy add \
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src 2001:db8:2::1 dst 2001:db8:1::1 dir in \
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tmpl proto esp mode transport
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run_cmd host-2 ip -6 xfrm policy add \
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src 2001:db8:1::1 dst 2001:db8:2::1 dir in \
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tmpl proto esp mode transport
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run_cmd host-2 ip -6 xfrm policy add \
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src 2001:db8:2::1 dst 2001:db8:1::1 dir out \
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tmpl proto esp mode transport
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ip -netns host-1 -6 xfrm state add \
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src 2001:db8:1::1 dst 2001:db8:2::1 \
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spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-1 -6 xfrm state add \
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src 2001:db8:2::1 dst 2001:db8:1::1 \
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spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-2 -6 xfrm state add \
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src 2001:db8:1::1 dst 2001:db8:2::1 \
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spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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ip -netns host-2 -6 xfrm state add \
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src 2001:db8:2::1 dst 2001:db8:1::1 \
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spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
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0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
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}
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teardown_ipsec()
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{
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run_cmd host-1 ip xfrm state flush
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run_cmd host-1 ip xfrm policy flush
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run_cmd host-2 ip xfrm state flush
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run_cmd host-2 ip xfrm policy flush
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}
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################################################################################
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# generate traffic through tunnel for various cases
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run_ping()
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{
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local desc="$1"
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run_cmd host-1 ping -c1 -w1 172.16.1.2
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log_test $? 0 "IPv4 basic L2TP tunnel ${desc}"
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run_cmd host-1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2
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log_test $? 0 "IPv4 route through L2TP tunnel ${desc}"
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run_cmd host-1 ${ping6} -c1 -w1 fc00:1::2
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log_test $? 0 "IPv6 basic L2TP tunnel ${desc}"
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run_cmd host-1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2
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log_test $? 0 "IPv6 route through L2TP tunnel ${desc}"
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}
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run_tests()
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{
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local desc
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setup
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run_ping
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setup_ipsec
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run_ping "- with IPsec"
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run_cmd host-1 ping -c1 -w1 172.16.1.2
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log_test $? 0 "IPv4 basic L2TP tunnel ${desc}"
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run_cmd host-1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2
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log_test $? 0 "IPv4 route through L2TP tunnel ${desc}"
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run_cmd host-1 ${ping6} -c1 -w1 fc00:1::2
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log_test $? 0 "IPv6 basic L2TP tunnel - with IPsec"
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run_cmd host-1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2
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log_test $? 0 "IPv6 route through L2TP tunnel - with IPsec"
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teardown_ipsec
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run_ping "- after IPsec teardown"
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}
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################################################################################
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# main
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declare -i nfail=0
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declare -i nsuccess=0
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while getopts :pv o
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do
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case $o in
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p) PAUSE_ON_FAIL=yes;;
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v) VERBOSE=$(($VERBOSE + 1));;
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*) exit 1;;
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esac
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done
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run_tests
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cleanup
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printf "\nTests passed: %3d\n" ${nsuccess}
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printf "Tests failed: %3d\n" ${nfail}
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