bd85d5aa3e
Add CRAM tests for tr181-gre, including an end-to-end tunnel test: the remote peer lives in a network namespace behind a veth pair emulating the WAN link, so the test is self-contained and is not tied to a specific board. The end-to-end test drives the tunnel through the data model (GRE.Tunnel + Interface + IP.Interface), verifies the kernel route, reply behaviour with and without a peer return route, the UseSequenceNumber/UseChecksum toggles and runs a short iperf3 session through the tunnel. References: PCF-2294, FEAT-150 Signed-off-by: Khaled Hasni <khaled.hasni_ext@softathome.com> Signed-off-by: Alexandre Fiset <alexandre.fiset@softathome.com>
97 lines
3.6 KiB
Perl
97 lines
3.6 KiB
Perl
End-to-end GRE tunnel test (IPv4-over-IPv4). The remote peer runs in a
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network namespace on the DUT, connected through a veth pair that
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emulates the WAN link, so the test is self-contained.
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Create R alias:
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$ alias R="${CRAM_REMOTE_COMMAND:-}"
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$ R logger -t cram "Starting GRE E2E test"
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Create the peer network namespace with a veth link emulating the WAN:
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$ R "(ip netns add grepeer; \
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> ip link add veth-gre type veth peer name veth-grep; \
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> ip link set veth-grep netns grepeer; \
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> ip addr add 192.168.78.1/24 dev veth-gre; \
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> ip link set veth-gre up; \
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> ip netns exec grepeer ip addr add 192.168.78.2/24 dev veth-grep; \
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> ip netns exec grepeer ip link set veth-grep up; \
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> ip netns exec grepeer ip link set lo up) > /dev/null 2>&1"
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Configure the GRE peer endpoint inside the namespace:
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$ R "(ip netns exec grepeer ip tunnel add gre1 mode gre remote 192.168.78.1 local 192.168.78.2; \
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> ip netns exec grepeer ip addr add 10.0.1.1 dev gre1; \
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> ip netns exec grepeer ip link set gre1 up) > /dev/null 2>&1"
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Configure the CPE tunnel through the data model:
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$ GRETIDX=$(R "ba-cli 'GRE.Tunnel.+{Alias=\"e2e\",Enable=1,RemoteEndpoints=\"192.168.78.2\",DeliveryHeaderProtocol=\"IPv4\"}'" 2>/dev/null | sed -ne 's/^GRE.Tunnel.\([0-9]\+\).$/\1/p')
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$ R "ba-cli 'GRE.Tunnel.e2e.Interface.+{Alias=\"i1\",Enable=1}'" > /dev/null 2>&1
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$ sleep 3
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$ GREIFACE=$(R "ba-cli 'GRE.Tunnel.e2e.Interface.1.Name?'" | sed -ne 's/.*Name="\(.*\)"$/\1/p')
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Assign an IPv4 address to the CPE GRE interface through the data model:
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$ IPIDX=$(R "ba-cli 'IP.Interface.+{Alias=\"gre-e2e\",Enable=1,IPv4Enable=1,LowerLayers=\"Device.GRE.Tunnel.$GRETIDX.Interface.1.\",Router=\"Device.Routing.Router.1.\"}'" 2>/dev/null | sed -ne 's/^IP.Interface.\([0-9]\+\).$/\1/p')
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$ R "ba-cli 'IP.Interface.$IPIDX.IPv4Address.+{Alias=\"gre-e2e\",AddressingType=\"Static\",IPAddress=\"10.0.1.2\",SubnetMask=\"255.255.255.0\",Enable=1}'" > /dev/null 2>&1
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$ sleep 3
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A route to 10.0.1.0/24 through the GRE interface is installed on the CPE:
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$ R "ip route show 10.0.1.0/24 | grep -c \"dev $GREIFACE\""
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1
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Without a return route on the peer, echo replies do not come back:
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$ R "ping -c 1 -W 2 10.0.1.1 > /dev/null 2>&1; echo \$?"
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1
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Add the return route on the peer and observe echo replies:
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$ R "ip netns exec grepeer ip route add 10.0.1.2 dev gre1"
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$ R "ping -c 3 -W 5 10.0.1.1 > /dev/null 2>&1; echo \$?"
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0
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Enable GRE sequence numbering on the CPE; traffic still passes:
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$ R "ba-cli 'GRE.Tunnel.e2e.Interface.1.UseSequenceNumber=1'" > /dev/null 2>&1
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$ sleep 2
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$ R "ip -d link show $GREIFACE | grep -c oseq"
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1
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$ R "ping -c 3 -W 5 10.0.1.1 > /dev/null 2>&1; echo \$?"
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0
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Enable GRE output checksum on the CPE; the peer does not accept
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checksummed packets yet, so echo replies stop:
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$ R "ba-cli 'GRE.Tunnel.e2e.Interface.1.UseChecksum=1'" > /dev/null 2>&1
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$ sleep 2
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$ R "ip -d link show $GREIFACE | grep -c ocsum"
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1
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$ R "ping -c 1 -W 2 10.0.1.1 > /dev/null 2>&1; echo \$?"
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1
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Enable GRE input checksum on the peer; echo replies come back again:
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$ R "ip netns exec grepeer ip link set gre1 type gre icsum"
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$ R "ping -c 3 -W 5 10.0.1.1 > /dev/null 2>&1; echo \$?"
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0
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Run a short throughput test through the tunnel:
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$ R "ip netns exec grepeer iperf3 -s -D > /dev/null 2>&1"
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$ sleep 1
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$ R "iperf3 -c 10.0.1.1 -t 2 > /dev/null 2>&1; echo \$?"
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0
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$ R "killall iperf3 > /dev/null 2>&1; true"
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Cleanup:
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$ R "ba-cli 'IP.Interface.$IPIDX.-'" > /dev/null 2>&1
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$ R "ba-cli 'GRE.Tunnel.e2e-'" > /dev/null 2>&1
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$ R "ip netns del grepeer > /dev/null 2>&1; true"
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$ R logger -t cram "GRE E2E test finished"
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