selftest: net: add some traceroute tests
Added the following traceroute tests.
IPV6:
Verify that in this scenario
------------------------ N2
| |
------ ------ N3 ----
| R1 | | R2 |------|H2|
------ ------ ----
| |
------------------------ N1
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----
|H1|
----
where H1's default route goes through R1 and R1's default route goes
through R2 over N2, traceroute6 from H1 to H2 reports R2's address
on N2 and not N1.
IPV4:
Verify that traceroute from H1 to H2 shows 1.0.1.1 in this scenario
1.0.3.1/24
---- 1.0.1.3/24 1.0.1.1/24 ---- 1.0.2.1/24 1.0.2.4/24 ----
|H1|--------------------------|R1|--------------------------|H2|
---- N1 ---- N2 ----
where net.ipv4.icmp_errors_use_inbound_ifaddr is set on R1 and
1.0.3.1/24 and 1.0.1.1/24 are respectively R1's primary and secondary
address on N1.
v2: fixed some typos, and have bridge in R1 instead of R2 in IPV6 test.
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Francesco Ruggeri
David S. Miller
parent
3edcc56801
commit
3c28d99fc6
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@ -10,7 +10,7 @@ TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh
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TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
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TEST_PROGS += udpgro_bench.sh udpgro.sh test_vxlan_under_vrf.sh reuseport_addr_any.sh
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TEST_PROGS += test_vxlan_fdb_changelink.sh so_txtime.sh ipv6_flowlabel.sh
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TEST_PROGS += tcp_fastopen_backup_key.sh fcnal-test.sh l2tp.sh
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TEST_PROGS += tcp_fastopen_backup_key.sh fcnal-test.sh l2tp.sh traceroute.sh
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TEST_PROGS_EXTENDED := in_netns.sh
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TEST_GEN_FILES = socket nettest
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any
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@ -0,0 +1,322 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Run traceroute/traceroute6 tests
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#
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VERBOSE=0
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PAUSE_ON_FAIL=no
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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 exec ${ns} ip link set lo up
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if [ "${addr}" != "-" ]; then
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ip netns exec ${ns} ip addr add dev lo ${addr}
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fi
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if [ "${addr6}" != "-" ]; then
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ip netns exec ${ns} ip -6 addr add dev lo ${addr6}
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fi
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ip netns exec ${ns} ip ro add unreachable default metric 8192
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ip netns exec ${ns} ip -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 exec ${ns1} ip li add ${ns1_dev} type veth peer name tmp
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ip netns exec ${ns1} ip li set ${ns1_dev} up
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ip netns exec ${ns1} ip li set tmp netns ${ns2} name ${ns2_dev}
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ip netns exec ${ns2} ip li set ${ns2_dev} up
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if [ "${ns1_addr}" != "-" ]; then
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ip netns exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr}
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fi
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if [ "${ns2_addr}" != "-" ]; then
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ip netns exec ${ns2} ip 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 exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr6}
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fi
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if [ "${ns2_addr6}" != "-" ]; then
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ip netns exec ${ns2} ip addr add dev ${ns2_dev} ${ns2_addr6}
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fi
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}
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################################################################################
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# traceroute6 test
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#
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# Verify that in this scenario
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#
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# ------------------------ N2
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# | |
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# ------ ------ N3 ----
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# | R1 | | R2 |------|H2|
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# ------ ------ ----
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# | |
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# ------------------------ N1
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# |
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# ----
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# |H1|
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# ----
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#
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# where H1's default route goes through R1 and R1's default route goes
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# through R2 over N2, traceroute6 from H1 to H2 reports R2's address
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# on N2 and not N1.
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#
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# Addresses are assigned as follows:
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#
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# N1: 2000:101::/64
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# N2: 2000:102::/64
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# N3: 2000:103::/64
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#
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# R1's host part of address: 1
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# R2's host part of address: 2
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# H1's host part of address: 3
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# H2's host part of address: 4
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#
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# For example:
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# the IPv6 address of R1's interface on N2 is 2000:102::1/64
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cleanup_traceroute6()
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{
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local ns
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for ns in host-1 host-2 router-1 router-2
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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_traceroute6()
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{
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brdev=br0
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# start clean
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cleanup_traceroute6
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set -e
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create_ns host-1
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create_ns host-2
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create_ns router-1
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create_ns router-2
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# Setup N3
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connect_ns router-2 eth3 - 2000:103::2/64 host-2 eth3 - 2000:103::4/64
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ip netns exec host-2 ip route add default via 2000:103::2
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# Setup N2
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connect_ns router-1 eth2 - 2000:102::1/64 router-2 eth2 - 2000:102::2/64
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ip netns exec router-1 ip route add default via 2000:102::2
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# Setup N1. host-1 and router-2 connect to a bridge in router-1.
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ip netns exec router-1 ip link add name ${brdev} type bridge
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ip netns exec router-1 ip link set ${brdev} up
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ip netns exec router-1 ip addr add 2000:101::1/64 dev ${brdev}
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connect_ns host-1 eth0 - 2000:101::3/64 router-1 eth0 - -
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ip netns exec router-1 ip link set dev eth0 master ${brdev}
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ip netns exec host-1 ip route add default via 2000:101::1
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connect_ns router-2 eth1 - 2000:101::2/64 router-1 eth1 - -
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ip netns exec router-1 ip link set dev eth1 master ${brdev}
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# Prime the network
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ip netns exec host-1 ping6 -c5 2000:103::4 >/dev/null 2>&1
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set +e
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}
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run_traceroute6()
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{
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if [ ! -x "$(command -v traceroute6)" ]; then
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echo "SKIP: Could not run IPV6 test without traceroute6"
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return
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fi
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setup_traceroute6
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# traceroute6 host-2 from host-1 (expects 2000:102::2)
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run_cmd host-1 "traceroute6 2000:103::4 | grep -q 2000:102::2"
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log_test $? 0 "IPV6 traceroute"
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cleanup_traceroute6
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}
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################################################################################
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# traceroute test
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#
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# Verify that traceroute from H1 to H2 shows 1.0.1.1 in this scenario
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#
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# 1.0.3.1/24
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# ---- 1.0.1.3/24 1.0.1.1/24 ---- 1.0.2.1/24 1.0.2.4/24 ----
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# |H1|--------------------------|R1|--------------------------|H2|
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# ---- N1 ---- N2 ----
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#
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# where net.ipv4.icmp_errors_use_inbound_ifaddr is set on R1 and
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# 1.0.3.1/24 and 1.0.1.1/24 are respectively R1's primary and secondary
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# address on N1.
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#
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cleanup_traceroute()
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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 ${ns} 2>/dev/null
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done
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}
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setup_traceroute()
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{
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# start clean
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cleanup_traceroute
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set -e
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create_ns host-1
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create_ns host-2
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create_ns router
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connect_ns host-1 eth0 1.0.1.3/24 - \
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router eth1 1.0.3.1/24 -
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ip netns exec host-1 ip route add default via 1.0.1.1
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ip netns exec router ip addr add 1.0.1.1/24 dev eth1
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ip netns exec router sysctl -qw \
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net.ipv4.icmp_errors_use_inbound_ifaddr=1
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connect_ns host-2 eth0 1.0.2.4/24 - \
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router eth2 1.0.2.1/24 -
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ip netns exec host-2 ip route add default via 1.0.2.1
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# Prime the network
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ip netns exec host-1 ping -c5 1.0.2.4 >/dev/null 2>&1
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set +e
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}
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run_traceroute()
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{
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if [ ! -x "$(command -v traceroute)" ]; then
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echo "SKIP: Could not run IPV4 test without traceroute"
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return
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fi
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setup_traceroute
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# traceroute host-2 from host-1 (expects 1.0.1.1). Takes a while.
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run_cmd host-1 "traceroute 1.0.2.4 | grep -q 1.0.1.1"
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log_test $? 0 "IPV4 traceroute"
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cleanup_traceroute
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}
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################################################################################
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# Run tests
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run_tests()
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{
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run_traceroute6
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run_traceroute
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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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printf "\nTests passed: %3d\n" ${nsuccess}
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printf "Tests failed: %3d\n" ${nfail}
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