[PATCH v3 net-next 4/5] selftests: openvswitch: add basic ct test case parsing
From: Aaron Conole
Date: Tue Aug 01 2023 - 17:24:26 EST
Forwarding via ct() action is an important use case for openvswitch, but
generally would require using a full ovs-vswitchd to get working. Add a
ct action parser for basic ct test case.
Signed-off-by: Aaron Conole <aconole@xxxxxxxxxx>
Reviewed-by: Adrian Moreno <amorenoz@xxxxxxxxxx>
---
NOTE: A number of lines flag the line-length checkpatch
warning, but there didnt seem to be a really good
way of breaking the lines smaller.
.../selftests/net/openvswitch/openvswitch.sh | 68 +++++++++++++++++++
.../selftests/net/openvswitch/ovs-dpctl.py | 39 +++++++++++
2 files changed, 107 insertions(+)
diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh
index 5d60a9466dab3..40a66c72af0f0 100755
--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh
+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh
@@ -12,6 +12,7 @@ TRACING=0
tests="
arp_ping eth-arp: Basic arp ping between two NS
+ ct_connect_v4 ip4-ct-xon: Basic ipv4 tcp connection using ct
connect_v4 ip4-xon: Basic ipv4 ping between two NS
netlink_checks ovsnl: validate netlink attrs and settings
upcall_interfaces ovs: test the upcall interfaces"
@@ -193,6 +194,73 @@ test_arp_ping () {
return 0
}
+# ct_connect_v4 test
+# - client has 1500 byte MTU
+# - server has 1500 byte MTU
+# - use ICMP to ping in each direction
+# - only allow CT state stuff to pass through new in c -> s
+test_ct_connect_v4 () {
+
+ which nc >/dev/null 2>/dev/null || return $ksft_skip
+
+ sbx_add "test_ct_connect_v4" || return $?
+
+ ovs_add_dp "test_ct_connect_v4" ct4 || return 1
+ info "create namespaces"
+ for ns in client server; do
+ ovs_add_netns_and_veths "test_ct_connect_v4" "ct4" "$ns" \
+ "${ns:0:1}0" "${ns:0:1}1" || return 1
+ done
+
+ ip netns exec client ip addr add 172.31.110.10/24 dev c1
+ ip netns exec client ip link set c1 up
+ ip netns exec server ip addr add 172.31.110.20/24 dev s1
+ ip netns exec server ip link set s1 up
+
+ # Add forwarding for ARP and ip packets - completely wildcarded
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'ct_state(-trk),eth(),eth_type(0x0800),ipv4()' \
+ 'ct(commit),recirc(0x1)' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'recirc_id(0x1),ct_state(+trk+new),in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10)' \
+ '2' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'recirc_id(0x1),ct_state(+trk+est),in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10)' \
+ '2' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'recirc_id(0x1),ct_state(+trk+est),in_port(2),eth(),eth_type(0x0800),ipv4(dst=172.31.110.10)' \
+ '1' || return 1
+ ovs_add_flow "test_ct_connect_v4" ct4 \
+ 'recirc_id(0x1),ct_state(+trk+inv),eth(),eth_type(0x0800),ipv4()' 'drop' || \
+ return 1
+
+ # do a ping
+ ovs_sbx "test_ct_connect_v4" ip netns exec client ping 172.31.110.20 -c 3 || return 1
+
+ # create an echo server in 'server'
+ echo "server" | \
+ ovs_netns_spawn_daemon "test_ct_connect_v4" "server" \
+ nc -lvnp 4443
+ ovs_sbx "test_ct_connect_v4" ip netns exec client nc -i 1 -zv 172.31.110.20 4443 || return 1
+
+ # Now test in the other direction (should fail)
+ echo "client" | \
+ ovs_netns_spawn_daemon "test_ct_connect_v4" "client" \
+ nc -lvnp 4443
+ ovs_sbx "test_ct_connect_v4" ip netns exec client nc -i 1 -zv 172.31.110.10 4443
+ if [ $? == 0 ]; then
+ info "ct connect to client was successful"
+ return 1
+ fi
+
+ info "done..."
+ return 0
+}
+
# connect_v4 test
# - client has 1500 byte MTU
# - server has 1500 byte MTU
diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
index a9b8f52f6bfea..1a3dc3762361b 100644
--- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
+++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
@@ -62,6 +62,15 @@ def macstr(mac):
return outstr
+def strcspn(str1, str2):
+ tot = 0
+ for char in str1:
+ if str2.find(char) != -1:
+ return tot
+ tot += 1
+ return tot
+
+
def strspn(str1, str2):
tot = 0
for char in str1:
@@ -496,6 +505,36 @@ class ovsactions(nla):
actstr = actstr[strspn(actstr, ", ") :]
parsed = True
+ if parse_starts_block(actstr, "ct(", False):
+ actstr = actstr[len("ct(") :]
+ ctact = ovsactions.ctact()
+
+ for scan in (
+ ("commit", "OVS_CT_ATTR_COMMIT", None),
+ ("force_commit", "OVS_CT_ATTR_FORCE_COMMIT", None),
+ ("zone", "OVS_CT_ATTR_ZONE", int),
+ ("mark", "OVS_CT_ATTR_MARK", int),
+ ("helper", "OVS_CT_ATTR_HELPER", lambda x, y: str(x)),
+ ("timeout", "OVS_CT_ATTR_TIMEOUT", lambda x, y: str(x)),
+ ):
+ if actstr.startswith(scan[0]):
+ actstr = actstr[len(scan[0]) :]
+ if scan[2] is not None:
+ if actstr[0] != "=":
+ raise ValueError("Invalid ct attr")
+ actstr = actstr[1:]
+ pos = strcspn(actstr, ",)")
+ datum = scan[2](actstr[:pos], 0)
+ ctact["attrs"].append([scan[1], datum])
+ actstr = actstr[pos:]
+ else:
+ ctact["attrs"].append([scan[1], None])
+ actstr = actstr[strspn(actstr, ", ") :]
+
+ self["attrs"].append(["OVS_ACTION_ATTR_CT", ctact])
+ parsed = True
+
+ actstr = actstr[strspn(actstr, "), ") :]
if not parsed:
raise ValueError("Action str: '%s' not supported" % actstr)
--
2.40.1