503 lines
17 KiB
Bash
Executable File
503 lines
17 KiB
Bash
Executable File
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# author: Andrea Mayer <andrea.mayer@uniroma2.it>
|
|
# author: Paolo Lungaroni <paolo.lungaroni@cnit.it>
|
|
|
|
# This test is designed for evaluating the new SRv6 End.DT6 behavior used for
|
|
# implementing IPv6 L3 VPN use cases.
|
|
#
|
|
# Hereafter a network diagram is shown, where two different tenants (named 100
|
|
# and 200) offer IPv6 L3 VPN services allowing hosts to communicate with each
|
|
# other across an IPv6 network.
|
|
#
|
|
# Only hosts belonging to the same tenant (and to the same VPN) can communicate
|
|
# with each other. Instead, the communication among hosts of different tenants
|
|
# is forbidden.
|
|
# In other words, hosts hs-t100-1 and hs-t100-2 are connected through the IPv6
|
|
# L3 VPN of tenant 100 while hs-t200-3 and hs-t200-4 are connected using the
|
|
# IPv6 L3 VPN of tenant 200. Cross connection between tenant 100 and tenant 200
|
|
# is forbidden and thus, for example, hs-t100-1 cannot reach hs-t200-3 and vice
|
|
# versa.
|
|
#
|
|
# Routers rt-1 and rt-2 implement IPv6 L3 VPN services leveraging the SRv6
|
|
# architecture. The key components for such VPNs are: a) SRv6 Encap behavior,
|
|
# b) SRv6 End.DT6 behavior and c) VRF.
|
|
#
|
|
# To explain how an IPv6 L3 VPN based on SRv6 works, let us briefly consider an
|
|
# example where, within the same domain of tenant 100, the host hs-t100-1 pings
|
|
# the host hs-t100-2.
|
|
#
|
|
# First of all, L2 reachability of the host hs-t100-2 is taken into account by
|
|
# the router rt-1 which acts as a ndp proxy.
|
|
#
|
|
# When the host hs-t100-1 sends an IPv6 packet destined to hs-t100-2, the
|
|
# router rt-1 receives the packet on the internal veth-t100 interface. Such
|
|
# interface is enslaved to the VRF vrf-100 whose associated table contains the
|
|
# SRv6 Encap route for encapsulating any IPv6 packet in a IPv6 plus the Segment
|
|
# Routing Header (SRH) packet. This packet is sent through the (IPv6) core
|
|
# network up to the router rt-2 that receives it on veth0 interface.
|
|
#
|
|
# The rt-2 router uses the 'localsid' routing table to process incoming
|
|
# IPv6+SRH packets which belong to the VPN of the tenant 100. For each of these
|
|
# packets, the SRv6 End.DT6 behavior removes the outer IPv6+SRH headers and
|
|
# performs the lookup on the vrf-100 table using the destination address of
|
|
# the decapsulated IPv6 packet. Afterwards, the packet is sent to the host
|
|
# hs-t100-2 through the veth-t100 interface.
|
|
#
|
|
# The ping response follows the same processing but this time the role of rt-1
|
|
# and rt-2 are swapped.
|
|
#
|
|
# Of course, the IPv6 L3 VPN for tenant 200 works exactly as the IPv6 L3 VPN
|
|
# for tenant 100. In this case, only hosts hs-t200-3 and hs-t200-4 are able to
|
|
# connect with each other.
|
|
#
|
|
#
|
|
# +-------------------+ +-------------------+
|
|
# | | | |
|
|
# | hs-t100-1 netns | | hs-t100-2 netns |
|
|
# | | | |
|
|
# | +-------------+ | | +-------------+ |
|
|
# | | veth0 | | | | veth0 | |
|
|
# | | cafe::1/64 | | | | cafe::2/64 | |
|
|
# | +-------------+ | | +-------------+ |
|
|
# | . | | . |
|
|
# +-------------------+ +-------------------+
|
|
# . .
|
|
# . .
|
|
# . .
|
|
# +-----------------------------------+ +-----------------------------------+
|
|
# | . | | . |
|
|
# | +---------------+ | | +---------------- |
|
|
# | | veth-t100 | | | | veth-t100 | |
|
|
# | | cafe::254/64 | +----------+ | | +----------+ | cafe::254/64 | |
|
|
# | +-------+-------+ | localsid | | | | localsid | +-------+-------- |
|
|
# | | | table | | | | table | | |
|
|
# | +----+----+ +----------+ | | +----------+ +----+----+ |
|
|
# | | vrf-100 | | | | vrf-100 | |
|
|
# | +---------+ +------------+ | | +------------+ +---------+ |
|
|
# | | veth0 | | | | veth0 | |
|
|
# | | fd00::1/64 |.|...|.| fd00::2/64 | |
|
|
# | +---------+ +------------+ | | +------------+ +---------+ |
|
|
# | | vrf-200 | | | | vrf-200 | |
|
|
# | +----+----+ | | +----+----+ |
|
|
# | | | | | |
|
|
# | +-------+-------+ | | +-------+-------- |
|
|
# | | veth-t200 | | | | veth-t200 | |
|
|
# | | cafe::254/64 | | | | cafe::254/64 | |
|
|
# | +---------------+ rt-1 netns | | rt-2 netns +---------------- |
|
|
# | . | | . |
|
|
# +-----------------------------------+ +-----------------------------------+
|
|
# . .
|
|
# . .
|
|
# . .
|
|
# . .
|
|
# +-------------------+ +-------------------+
|
|
# | . | | . |
|
|
# | +-------------+ | | +-------------+ |
|
|
# | | veth0 | | | | veth0 | |
|
|
# | | cafe::3/64 | | | | cafe::4/64 | |
|
|
# | +-------------+ | | +-------------+ |
|
|
# | | | |
|
|
# | hs-t200-3 netns | | hs-t200-4 netns |
|
|
# | | | |
|
|
# +-------------------+ +-------------------+
|
|
#
|
|
#
|
|
# ~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
# | Network configuration |
|
|
# ~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
#
|
|
# rt-1: localsid table (table 90)
|
|
# +-------------------------------------------------+
|
|
# |SID |Action |
|
|
# +-------------------------------------------------+
|
|
# |fc00:21:100::6006|apply SRv6 End.DT6 vrftable 100|
|
|
# +-------------------------------------------------+
|
|
# |fc00:21:200::6006|apply SRv6 End.DT6 vrftable 200|
|
|
# +-------------------------------------------------+
|
|
#
|
|
# rt-1: VRF tenant 100 (table 100)
|
|
# +---------------------------------------------------+
|
|
# |host |Action |
|
|
# +---------------------------------------------------+
|
|
# |cafe::2 |apply seg6 encap segs fc00:12:100::6006|
|
|
# +---------------------------------------------------+
|
|
# |cafe::/64 |forward to dev veth_t100 |
|
|
# +---------------------------------------------------+
|
|
#
|
|
# rt-1: VRF tenant 200 (table 200)
|
|
# +---------------------------------------------------+
|
|
# |host |Action |
|
|
# +---------------------------------------------------+
|
|
# |cafe::4 |apply seg6 encap segs fc00:12:200::6006|
|
|
# +---------------------------------------------------+
|
|
# |cafe::/64 |forward to dev veth_t200 |
|
|
# +---------------------------------------------------+
|
|
#
|
|
#
|
|
# rt-2: localsid table (table 90)
|
|
# +-------------------------------------------------+
|
|
# |SID |Action |
|
|
# +-------------------------------------------------+
|
|
# |fc00:12:100::6006|apply SRv6 End.DT6 vrftable 100|
|
|
# +-------------------------------------------------+
|
|
# |fc00:12:200::6006|apply SRv6 End.DT6 vrftable 200|
|
|
# +-------------------------------------------------+
|
|
#
|
|
# rt-2: VRF tenant 100 (table 100)
|
|
# +---------------------------------------------------+
|
|
# |host |Action |
|
|
# +---------------------------------------------------+
|
|
# |cafe::1 |apply seg6 encap segs fc00:21:100::6006|
|
|
# +---------------------------------------------------+
|
|
# |cafe::/64 |forward to dev veth_t100 |
|
|
# +---------------------------------------------------+
|
|
#
|
|
# rt-2: VRF tenant 200 (table 200)
|
|
# +---------------------------------------------------+
|
|
# |host |Action |
|
|
# +---------------------------------------------------+
|
|
# |cafe::3 |apply seg6 encap segs fc00:21:200::6006|
|
|
# +---------------------------------------------------+
|
|
# |cafe::/64 |forward to dev veth_t200 |
|
|
# +---------------------------------------------------+
|
|
#
|
|
|
|
readonly LOCALSID_TABLE_ID=90
|
|
readonly IPv6_RT_NETWORK=fd00
|
|
readonly IPv6_HS_NETWORK=cafe
|
|
readonly VPN_LOCATOR_SERVICE=fc00
|
|
PING_TIMEOUT_SEC=4
|
|
|
|
ret=0
|
|
|
|
PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no}
|
|
|
|
log_test()
|
|
{
|
|
local rc=$1
|
|
local expected=$2
|
|
local msg="$3"
|
|
|
|
if [ ${rc} -eq ${expected} ]; then
|
|
nsuccess=$((nsuccess+1))
|
|
printf "\n TEST: %-60s [ OK ]\n" "${msg}"
|
|
else
|
|
ret=1
|
|
nfail=$((nfail+1))
|
|
printf "\n TEST: %-60s [FAIL]\n" "${msg}"
|
|
if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
|
|
echo
|
|
echo "hit enter to continue, 'q' to quit"
|
|
read a
|
|
[ "$a" = "q" ] && exit 1
|
|
fi
|
|
fi
|
|
}
|
|
|
|
print_log_test_results()
|
|
{
|
|
if [ "$TESTS" != "none" ]; then
|
|
printf "\nTests passed: %3d\n" ${nsuccess}
|
|
printf "Tests failed: %3d\n" ${nfail}
|
|
fi
|
|
}
|
|
|
|
log_section()
|
|
{
|
|
echo
|
|
echo "################################################################################"
|
|
echo "TEST SECTION: $*"
|
|
echo "################################################################################"
|
|
}
|
|
|
|
cleanup()
|
|
{
|
|
ip link del veth-rt-1 2>/dev/null || true
|
|
ip link del veth-rt-2 2>/dev/null || true
|
|
|
|
# destroy routers rt-* and hosts hs-*
|
|
for ns in $(ip netns show | grep -E 'rt-*|hs-*'); do
|
|
ip netns del ${ns} || true
|
|
done
|
|
}
|
|
|
|
# Setup the basic networking for the routers
|
|
setup_rt_networking()
|
|
{
|
|
local rt=$1
|
|
local nsname=rt-${rt}
|
|
|
|
ip netns add ${nsname}
|
|
ip link set veth-rt-${rt} netns ${nsname}
|
|
ip -netns ${nsname} link set veth-rt-${rt} name veth0
|
|
|
|
ip netns exec ${nsname} sysctl -wq net.ipv6.conf.all.accept_dad=0
|
|
ip netns exec ${nsname} sysctl -wq net.ipv6.conf.default.accept_dad=0
|
|
|
|
ip -netns ${nsname} addr add ${IPv6_RT_NETWORK}::${rt}/64 dev veth0 nodad
|
|
ip -netns ${nsname} link set veth0 up
|
|
ip -netns ${nsname} link set lo up
|
|
|
|
ip netns exec ${nsname} sysctl -wq net.ipv6.conf.all.forwarding=1
|
|
}
|
|
|
|
setup_hs()
|
|
{
|
|
local hs=$1
|
|
local rt=$2
|
|
local tid=$3
|
|
local hsname=hs-t${tid}-${hs}
|
|
local rtname=rt-${rt}
|
|
local rtveth=veth-t${tid}
|
|
|
|
# set the networking for the host
|
|
ip netns add ${hsname}
|
|
|
|
ip netns exec ${hsname} sysctl -wq net.ipv6.conf.all.accept_dad=0
|
|
ip netns exec ${hsname} sysctl -wq net.ipv6.conf.default.accept_dad=0
|
|
|
|
ip -netns ${hsname} link add veth0 type veth peer name ${rtveth}
|
|
ip -netns ${hsname} link set ${rtveth} netns ${rtname}
|
|
ip -netns ${hsname} addr add ${IPv6_HS_NETWORK}::${hs}/64 dev veth0 nodad
|
|
ip -netns ${hsname} link set veth0 up
|
|
ip -netns ${hsname} link set lo up
|
|
|
|
# configure the VRF for the tenant X on the router which is directly
|
|
# connected to the source host.
|
|
ip -netns ${rtname} link add vrf-${tid} type vrf table ${tid}
|
|
ip -netns ${rtname} link set vrf-${tid} up
|
|
|
|
ip netns exec ${rtname} sysctl -wq net.ipv6.conf.all.accept_dad=0
|
|
ip netns exec ${rtname} sysctl -wq net.ipv6.conf.default.accept_dad=0
|
|
|
|
# enslave the veth-tX interface to the vrf-X in the access router
|
|
ip -netns ${rtname} link set ${rtveth} master vrf-${tid}
|
|
ip -netns ${rtname} addr add ${IPv6_HS_NETWORK}::254/64 dev ${rtveth} nodad
|
|
ip -netns ${rtname} link set ${rtveth} up
|
|
|
|
ip netns exec ${rtname} sysctl -wq net.ipv6.conf.${rtveth}.proxy_ndp=1
|
|
|
|
ip netns exec ${rtname} sh -c "echo 1 > /proc/sys/net/vrf/strict_mode"
|
|
}
|
|
|
|
setup_vpn_config()
|
|
{
|
|
local hssrc=$1
|
|
local rtsrc=$2
|
|
local hsdst=$3
|
|
local rtdst=$4
|
|
local tid=$5
|
|
|
|
local hssrc_name=hs-t${tid}-${hssrc}
|
|
local hsdst_name=hs-t${tid}-${hsdst}
|
|
local rtsrc_name=rt-${rtsrc}
|
|
local rtdst_name=rt-${rtdst}
|
|
local rtveth=veth-t${tid}
|
|
local vpn_sid=${VPN_LOCATOR_SERVICE}:${hssrc}${hsdst}:${tid}::6006
|
|
|
|
ip -netns ${rtsrc_name} -6 neigh add proxy ${IPv6_HS_NETWORK}::${hsdst} dev ${rtveth}
|
|
|
|
# set the encap route for encapsulating packets which arrive from the
|
|
# host hssrc and destined to the access router rtsrc.
|
|
ip -netns ${rtsrc_name} -6 route add ${IPv6_HS_NETWORK}::${hsdst}/128 vrf vrf-${tid} \
|
|
encap seg6 mode encap segs ${vpn_sid} dev veth0
|
|
ip -netns ${rtsrc_name} -6 route add ${vpn_sid}/128 vrf vrf-${tid} \
|
|
via fd00::${rtdst} dev veth0
|
|
|
|
# set the decap route for decapsulating packets which arrive from
|
|
# the rtdst router and destined to the hsdst host.
|
|
ip -netns ${rtdst_name} -6 route add ${vpn_sid}/128 table ${LOCALSID_TABLE_ID} \
|
|
encap seg6local action End.DT6 vrftable ${tid} dev vrf-${tid}
|
|
|
|
# all sids for VPNs start with a common locator which is fc00::/16.
|
|
# Routes for handling the SRv6 End.DT6 behavior instances are grouped
|
|
# together in the 'localsid' table.
|
|
#
|
|
# NOTE: added only once
|
|
if [ -z "$(ip -netns ${rtdst_name} -6 rule show | \
|
|
grep "to ${VPN_LOCATOR_SERVICE}::/16 lookup ${LOCALSID_TABLE_ID}")" ]; then
|
|
ip -netns ${rtdst_name} -6 rule add \
|
|
to ${VPN_LOCATOR_SERVICE}::/16 \
|
|
lookup ${LOCALSID_TABLE_ID} prio 999
|
|
fi
|
|
}
|
|
|
|
setup()
|
|
{
|
|
ip link add veth-rt-1 type veth peer name veth-rt-2
|
|
# setup the networking for router rt-1 and router rt-2
|
|
setup_rt_networking 1
|
|
setup_rt_networking 2
|
|
|
|
# setup two hosts for the tenant 100.
|
|
# - host hs-1 is directly connected to the router rt-1;
|
|
# - host hs-2 is directly connected to the router rt-2.
|
|
setup_hs 1 1 100 #args: host router tenant
|
|
setup_hs 2 2 100
|
|
|
|
# setup two hosts for the tenant 200
|
|
# - host hs-3 is directly connected to the router rt-1;
|
|
# - host hs-4 is directly connected to the router rt-2.
|
|
setup_hs 3 1 200
|
|
setup_hs 4 2 200
|
|
|
|
# setup the IPv6 L3 VPN which connects the host hs-t100-1 and host
|
|
# hs-t100-2 within the same tenant 100.
|
|
setup_vpn_config 1 1 2 2 100 #args: src_host src_router dst_host dst_router tenant
|
|
setup_vpn_config 2 2 1 1 100
|
|
|
|
# setup the IPv6 L3 VPN which connects the host hs-t200-3 and host
|
|
# hs-t200-4 within the same tenant 200.
|
|
setup_vpn_config 3 1 4 2 200
|
|
setup_vpn_config 4 2 3 1 200
|
|
}
|
|
|
|
check_rt_connectivity()
|
|
{
|
|
local rtsrc=$1
|
|
local rtdst=$2
|
|
|
|
ip netns exec rt-${rtsrc} ping -c 1 -W 1 ${IPv6_RT_NETWORK}::${rtdst} \
|
|
>/dev/null 2>&1
|
|
}
|
|
|
|
check_and_log_rt_connectivity()
|
|
{
|
|
local rtsrc=$1
|
|
local rtdst=$2
|
|
|
|
check_rt_connectivity ${rtsrc} ${rtdst}
|
|
log_test $? 0 "Routers connectivity: rt-${rtsrc} -> rt-${rtdst}"
|
|
}
|
|
|
|
check_hs_connectivity()
|
|
{
|
|
local hssrc=$1
|
|
local hsdst=$2
|
|
local tid=$3
|
|
|
|
ip netns exec hs-t${tid}-${hssrc} ping -c 1 -W ${PING_TIMEOUT_SEC} \
|
|
${IPv6_HS_NETWORK}::${hsdst} >/dev/null 2>&1
|
|
}
|
|
|
|
check_and_log_hs_connectivity()
|
|
{
|
|
local hssrc=$1
|
|
local hsdst=$2
|
|
local tid=$3
|
|
|
|
check_hs_connectivity ${hssrc} ${hsdst} ${tid}
|
|
log_test $? 0 "Hosts connectivity: hs-t${tid}-${hssrc} -> hs-t${tid}-${hsdst} (tenant ${tid})"
|
|
}
|
|
|
|
check_and_log_hs_isolation()
|
|
{
|
|
local hssrc=$1
|
|
local tidsrc=$2
|
|
local hsdst=$3
|
|
local tiddst=$4
|
|
|
|
check_hs_connectivity ${hssrc} ${hsdst} ${tidsrc}
|
|
# NOTE: ping should fail
|
|
log_test $? 1 "Hosts isolation: hs-t${tidsrc}-${hssrc} -X-> hs-t${tiddst}-${hsdst}"
|
|
}
|
|
|
|
|
|
check_and_log_hs2gw_connectivity()
|
|
{
|
|
local hssrc=$1
|
|
local tid=$2
|
|
|
|
check_hs_connectivity ${hssrc} 254 ${tid}
|
|
log_test $? 0 "Hosts connectivity: hs-t${tid}-${hssrc} -> gw (tenant ${tid})"
|
|
}
|
|
|
|
router_tests()
|
|
{
|
|
log_section "IPv6 routers connectivity test"
|
|
|
|
check_and_log_rt_connectivity 1 2
|
|
check_and_log_rt_connectivity 2 1
|
|
}
|
|
|
|
host2gateway_tests()
|
|
{
|
|
log_section "IPv6 connectivity test among hosts and gateway"
|
|
|
|
check_and_log_hs2gw_connectivity 1 100
|
|
check_and_log_hs2gw_connectivity 2 100
|
|
|
|
check_and_log_hs2gw_connectivity 3 200
|
|
check_and_log_hs2gw_connectivity 4 200
|
|
}
|
|
|
|
host_vpn_tests()
|
|
{
|
|
log_section "SRv6 VPN connectivity test among hosts in the same tenant"
|
|
|
|
check_and_log_hs_connectivity 1 2 100
|
|
check_and_log_hs_connectivity 2 1 100
|
|
|
|
check_and_log_hs_connectivity 3 4 200
|
|
check_and_log_hs_connectivity 4 3 200
|
|
}
|
|
|
|
host_vpn_isolation_tests()
|
|
{
|
|
local i
|
|
local j
|
|
local k
|
|
local tmp
|
|
local l1="1 2"
|
|
local l2="3 4"
|
|
local t1=100
|
|
local t2=200
|
|
|
|
log_section "SRv6 VPN isolation test among hosts in different tentants"
|
|
|
|
for k in 0 1; do
|
|
for i in ${l1}; do
|
|
for j in ${l2}; do
|
|
check_and_log_hs_isolation ${i} ${t1} ${j} ${t2}
|
|
done
|
|
done
|
|
|
|
# let us test the reverse path
|
|
tmp="${l1}"; l1="${l2}"; l2="${tmp}"
|
|
tmp=${t1}; t1=${t2}; t2=${tmp}
|
|
done
|
|
}
|
|
|
|
if [ "$(id -u)" -ne 0 ];then
|
|
echo "SKIP: Need root privileges"
|
|
exit 0
|
|
fi
|
|
|
|
if [ ! -x "$(command -v ip)" ]; then
|
|
echo "SKIP: Could not run test without ip tool"
|
|
exit 0
|
|
fi
|
|
|
|
modprobe vrf &>/dev/null
|
|
if [ ! -e /proc/sys/net/vrf/strict_mode ]; then
|
|
echo "SKIP: vrf sysctl does not exist"
|
|
exit 0
|
|
fi
|
|
|
|
cleanup &>/dev/null
|
|
|
|
setup
|
|
|
|
router_tests
|
|
host2gateway_tests
|
|
host_vpn_tests
|
|
host_vpn_isolation_tests
|
|
|
|
print_log_test_results
|
|
|
|
cleanup &>/dev/null
|
|
|
|
exit ${ret}
|