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-rwxr-xr-xtools/testing/selftests/net/traceroute.sh313
1 files changed, 313 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/traceroute.sh b/tools/testing/selftests/net/traceroute.sh
index dbb34c7e09ce..a7c6ab8a0347 100755
--- a/tools/testing/selftests/net/traceroute.sh
+++ b/tools/testing/selftests/net/traceroute.sh
@@ -36,6 +36,35 @@ run_cmd()
return $rc
}
+__check_traceroute_version()
+{
+ local cmd=$1; shift
+ local req_ver=$1; shift
+ local ver
+
+ req_ver=$(echo "$req_ver" | sed 's/\.//g')
+ ver=$($cmd -V 2>&1 | grep -Eo '[0-9]+.[0-9]+.[0-9]+' | sed 's/\.//g')
+ if [[ $ver -lt $req_ver ]]; then
+ return 1
+ else
+ return 0
+ fi
+}
+
+check_traceroute6_version()
+{
+ local req_ver=$1; shift
+
+ __check_traceroute_version traceroute6 "$req_ver"
+}
+
+check_traceroute_version()
+{
+ local req_ver=$1; shift
+
+ __check_traceroute_version traceroute "$req_ver"
+}
+
################################################################################
# create namespaces and interconnects
@@ -59,6 +88,8 @@ create_ns()
ip netns exec ${ns} ip -6 ro add unreachable default metric 8192
ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=1
+ ip netns exec ${ns} sysctl -qw net.ipv4.icmp_ratelimit=0
+ ip netns exec ${ns} sysctl -qw net.ipv6.icmp.ratelimit=0
ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
@@ -298,6 +329,144 @@ run_traceroute6_vrf()
}
################################################################################
+# traceroute6 with ICMP extensions test
+#
+# Verify that in this scenario
+#
+# ---- ---- ----
+# |H1|--------------------------|R1|--------------------------|H2|
+# ---- N1 ---- N2 ----
+#
+# ICMP extensions are correctly reported. The loopback interfaces on all the
+# nodes are assigned global addresses and the interfaces connecting the nodes
+# are assigned IPv6 link-local addresses.
+
+cleanup_traceroute6_ext()
+{
+ cleanup_all_ns
+}
+
+setup_traceroute6_ext()
+{
+ # Start clean
+ cleanup_traceroute6_ext
+
+ setup_ns h1 r1 h2
+ create_ns "$h1"
+ create_ns "$r1"
+ create_ns "$h2"
+
+ # Setup N1
+ connect_ns "$h1" eth1 - fe80::1/64 "$r1" eth1 - fe80::2/64
+ # Setup N2
+ connect_ns "$r1" eth2 - fe80::3/64 "$h2" eth2 - fe80::4/64
+
+ # Setup H1
+ ip -n "$h1" address add 2001:db8:1::1/128 dev lo
+ ip -n "$h1" route add ::/0 nexthop via fe80::2 dev eth1
+
+ # Setup R1
+ ip -n "$r1" address add 2001:db8:1::2/128 dev lo
+ ip -n "$r1" route add 2001:db8:1::1/128 nexthop via fe80::1 dev eth1
+ ip -n "$r1" route add 2001:db8:1::3/128 nexthop via fe80::4 dev eth2
+
+ # Setup H2
+ ip -n "$h2" address add 2001:db8:1::3/128 dev lo
+ ip -n "$h2" route add ::/0 nexthop via fe80::3 dev eth2
+
+ # Prime the network
+ ip netns exec "$h1" ping6 -c5 2001:db8:1::3 >/dev/null 2>&1
+}
+
+traceroute6_ext_iio_iif_test()
+{
+ local r1_ifindex h2_ifindex
+ local pkt_len=$1; shift
+
+ # Test that incoming interface info is not appended by default.
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep INC"
+ check_fail $? "Incoming interface info appended by default when should not"
+
+ # Test that the extension is appended when enabled.
+ run_cmd "$r1" "bash -c \"echo 0x01 > /proc/sys/net/ipv6/icmp/errors_extension_mask\""
+ check_err $? "Failed to enable incoming interface info extension on R1"
+
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep INC"
+ check_err $? "Incoming interface info not appended after enable"
+
+ # Test that the extension is not appended when disabled.
+ run_cmd "$r1" "bash -c \"echo 0x00 > /proc/sys/net/ipv6/icmp/errors_extension_mask\""
+ check_err $? "Failed to disable incoming interface info extension on R1"
+
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep INC"
+ check_fail $? "Incoming interface info appended after disable"
+
+ # Test that the extension is sent correctly from both R1 and H2.
+ run_cmd "$r1" "sysctl -w net.ipv6.icmp.errors_extension_mask=0x01"
+ r1_ifindex=$(ip -n "$r1" -j link show dev eth1 | jq '.[]["ifindex"]')
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep '<INC:$r1_ifindex,\"eth1\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from R1"
+
+ run_cmd "$h2" "sysctl -w net.ipv6.icmp.errors_extension_mask=0x01"
+ h2_ifindex=$(ip -n "$h2" -j link show dev eth2 | jq '.[]["ifindex"]')
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep '<INC:$h2_ifindex,\"eth2\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from H2"
+
+ # Add a global address on the incoming interface of R1 and check that
+ # it is reported.
+ run_cmd "$r1" "ip address add 2001:db8:100::1/64 dev eth1 nodad"
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep '<INC:$r1_ifindex,2001:db8:100::1,\"eth1\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from R1 after address addition"
+ run_cmd "$r1" "ip address del 2001:db8:100::1/64 dev eth1"
+
+ # Change name and MTU and make sure the result is still correct.
+ run_cmd "$r1" "ip link set dev eth1 name eth1tag mtu 1501"
+ run_cmd "$h1" "traceroute6 -e 2001:db8:1::3 $pkt_len | grep '<INC:$r1_ifindex,\"eth1tag\",mtu=1501>'"
+ check_err $? "Wrong incoming interface info reported from R1 after name and MTU change"
+ run_cmd "$r1" "ip link set dev eth1tag name eth1 mtu 1500"
+
+ run_cmd "$r1" "sysctl -w net.ipv6.icmp.errors_extension_mask=0x00"
+ run_cmd "$h2" "sysctl -w net.ipv6.icmp.errors_extension_mask=0x00"
+}
+
+run_traceroute6_ext()
+{
+ # Need at least version 2.1.5 for RFC 5837 support.
+ if ! check_traceroute6_version 2.1.5; then
+ log_test_skip "traceroute6 too old, missing ICMP extensions support"
+ return
+ fi
+
+ setup_traceroute6_ext
+
+ RET=0
+
+ ## General ICMP extensions tests
+
+ # Test that ICMP extensions are disabled by default.
+ run_cmd "$h1" "sysctl net.ipv6.icmp.errors_extension_mask | grep \"= 0$\""
+ check_err $? "ICMP extensions are not disabled by default"
+
+ # Test that unsupported values are rejected. Do not use "sysctl" as
+ # older versions do not return an error code upon failure.
+ run_cmd "$h1" "bash -c \"echo 0x80 > /proc/sys/net/ipv6/icmp/errors_extension_mask\""
+ check_fail $? "Unsupported sysctl value was not rejected"
+
+ ## Extension-specific tests
+
+ # Incoming interface info test. Test with various packet sizes,
+ # including the default one.
+ traceroute6_ext_iio_iif_test
+ traceroute6_ext_iio_iif_test 127
+ traceroute6_ext_iio_iif_test 128
+ traceroute6_ext_iio_iif_test 129
+
+ log_test "IPv6 traceroute with ICMP extensions"
+
+ cleanup_traceroute6_ext
+}
+
+################################################################################
# traceroute test
#
# Verify that traceroute from H1 to H2 shows 1.0.3.1 and 1.0.1.1 when
@@ -438,14 +607,157 @@ run_traceroute_vrf()
}
################################################################################
+# traceroute with ICMP extensions test
+#
+# Verify that in this scenario
+#
+# ---- ---- ----
+# |H1|--------------------------|R1|--------------------------|H2|
+# ---- N1 ---- N2 ----
+#
+# ICMP extensions are correctly reported. The loopback interfaces on all the
+# nodes are assigned global addresses and the interfaces connecting the nodes
+# are assigned IPv6 link-local addresses.
+
+cleanup_traceroute_ext()
+{
+ cleanup_all_ns
+}
+
+setup_traceroute_ext()
+{
+ # Start clean
+ cleanup_traceroute_ext
+
+ setup_ns h1 r1 h2
+ create_ns "$h1"
+ create_ns "$r1"
+ create_ns "$h2"
+
+ # Setup N1
+ connect_ns "$h1" eth1 - fe80::1/64 "$r1" eth1 - fe80::2/64
+ # Setup N2
+ connect_ns "$r1" eth2 - fe80::3/64 "$h2" eth2 - fe80::4/64
+
+ # Setup H1
+ ip -n "$h1" address add 192.0.2.1/32 dev lo
+ ip -n "$h1" route add 0.0.0.0/0 nexthop via inet6 fe80::2 dev eth1
+
+ # Setup R1
+ ip -n "$r1" address add 192.0.2.2/32 dev lo
+ ip -n "$r1" route add 192.0.2.1/32 nexthop via inet6 fe80::1 dev eth1
+ ip -n "$r1" route add 192.0.2.3/32 nexthop via inet6 fe80::4 dev eth2
+
+ # Setup H2
+ ip -n "$h2" address add 192.0.2.3/32 dev lo
+ ip -n "$h2" route add 0.0.0.0/0 nexthop via inet6 fe80::3 dev eth2
+
+ # Prime the network
+ ip netns exec "$h1" ping -c5 192.0.2.3 >/dev/null 2>&1
+}
+
+traceroute_ext_iio_iif_test()
+{
+ local r1_ifindex h2_ifindex
+ local pkt_len=$1; shift
+
+ # Test that incoming interface info is not appended by default.
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep INC"
+ check_fail $? "Incoming interface info appended by default when should not"
+
+ # Test that the extension is appended when enabled.
+ run_cmd "$r1" "bash -c \"echo 0x01 > /proc/sys/net/ipv4/icmp_errors_extension_mask\""
+ check_err $? "Failed to enable incoming interface info extension on R1"
+
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep INC"
+ check_err $? "Incoming interface info not appended after enable"
+
+ # Test that the extension is not appended when disabled.
+ run_cmd "$r1" "bash -c \"echo 0x00 > /proc/sys/net/ipv4/icmp_errors_extension_mask\""
+ check_err $? "Failed to disable incoming interface info extension on R1"
+
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep INC"
+ check_fail $? "Incoming interface info appended after disable"
+
+ # Test that the extension is sent correctly from both R1 and H2.
+ run_cmd "$r1" "sysctl -w net.ipv4.icmp_errors_extension_mask=0x01"
+ r1_ifindex=$(ip -n "$r1" -j link show dev eth1 | jq '.[]["ifindex"]')
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep '<INC:$r1_ifindex,\"eth1\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from R1"
+
+ run_cmd "$h2" "sysctl -w net.ipv4.icmp_errors_extension_mask=0x01"
+ h2_ifindex=$(ip -n "$h2" -j link show dev eth2 | jq '.[]["ifindex"]')
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep '<INC:$h2_ifindex,\"eth2\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from H2"
+
+ # Add a global address on the incoming interface of R1 and check that
+ # it is reported.
+ run_cmd "$r1" "ip address add 198.51.100.1/24 dev eth1"
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep '<INC:$r1_ifindex,198.51.100.1,\"eth1\",mtu=1500>'"
+ check_err $? "Wrong incoming interface info reported from R1 after address addition"
+ run_cmd "$r1" "ip address del 198.51.100.1/24 dev eth1"
+
+ # Change name and MTU and make sure the result is still correct.
+ # Re-add the route towards H1 since it was deleted when we removed the
+ # last IPv4 address from eth1 on R1.
+ run_cmd "$r1" "ip route add 192.0.2.1/32 nexthop via inet6 fe80::1 dev eth1"
+ run_cmd "$r1" "ip link set dev eth1 name eth1tag mtu 1501"
+ run_cmd "$h1" "traceroute -e 192.0.2.3 $pkt_len | grep '<INC:$r1_ifindex,\"eth1tag\",mtu=1501>'"
+ check_err $? "Wrong incoming interface info reported from R1 after name and MTU change"
+ run_cmd "$r1" "ip link set dev eth1tag name eth1 mtu 1500"
+
+ run_cmd "$r1" "sysctl -w net.ipv4.icmp_errors_extension_mask=0x00"
+ run_cmd "$h2" "sysctl -w net.ipv4.icmp_errors_extension_mask=0x00"
+}
+
+run_traceroute_ext()
+{
+ # Need at least version 2.1.5 for RFC 5837 support.
+ if ! check_traceroute_version 2.1.5; then
+ log_test_skip "traceroute too old, missing ICMP extensions support"
+ return
+ fi
+
+ setup_traceroute_ext
+
+ RET=0
+
+ ## General ICMP extensions tests
+
+ # Test that ICMP extensions are disabled by default.
+ run_cmd "$h1" "sysctl net.ipv4.icmp_errors_extension_mask | grep \"= 0$\""
+ check_err $? "ICMP extensions are not disabled by default"
+
+ # Test that unsupported values are rejected. Do not use "sysctl" as
+ # older versions do not return an error code upon failure.
+ run_cmd "$h1" "bash -c \"echo 0x80 > /proc/sys/net/ipv4/icmp_errors_extension_mask\""
+ check_fail $? "Unsupported sysctl value was not rejected"
+
+ ## Extension-specific tests
+
+ # Incoming interface info test. Test with various packet sizes,
+ # including the default one.
+ traceroute_ext_iio_iif_test
+ traceroute_ext_iio_iif_test 127
+ traceroute_ext_iio_iif_test 128
+ traceroute_ext_iio_iif_test 129
+
+ log_test "IPv4 traceroute with ICMP extensions"
+
+ cleanup_traceroute_ext
+}
+
+################################################################################
# Run tests
run_tests()
{
run_traceroute6
run_traceroute6_vrf
+ run_traceroute6_ext
run_traceroute
run_traceroute_vrf
+ run_traceroute_ext
}
################################################################################
@@ -462,6 +774,7 @@ done
require_command traceroute6
require_command traceroute
+require_command jq
run_tests
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 18:13:27 +0000