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authorMatus Fabian <matfabia@cisco.com>2018-11-16 04:41:31 -0800
committerDamjan Marion <dmarion@me.com>2018-11-19 09:15:48 +0000
commit6c01dceea5c612373453db7f1ccda589a2cd782e (patch)
tree9e105928cf0ede85eef9c87920a1bc8e65e83502 /test/test_nat.py
parentd30bf015ad3f7fbf206f143ed5d47a9af25148e8 (diff)
NAT44: fix bug in TCP close with output-feature interface (VPP-1493)
Change-Id: If8c883d6b1ee58de9a03012d3567ec82211a0225 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'test/test_nat.py')
-rw-r--r--test/test_nat.py82
1 files changed, 82 insertions, 0 deletions
diff --git a/test/test_nat.py b/test/test_nat.py
index e26aa27ddbd..22e8903caf5 100644
--- a/test/test_nat.py
+++ b/test/test_nat.py
@@ -4838,6 +4838,88 @@ class TestNAT44EndpointDependent(MethodHolder):
adresses = self.vapi.nat44_address_dump()
self.assertEqual(0, len(adresses))
+ def test_tcp_close(self):
+ """ Close TCP session from inside network - output feature """
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_address(self.pg1.local_ip4)
+ twice_nat_addr = '10.0.1.3'
+ service_ip = '192.168.16.150'
+ self.nat44_add_address(twice_nat_addr, twice_nat=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4,
+ service_ip,
+ 80,
+ 80,
+ proto=IP_PROTOS.tcp,
+ out2in_only=1,
+ twice_nat=1)
+ sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
+ start_sessnum = len(sessions)
+
+ # SYN packet out->in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=service_ip) /
+ TCP(sport=33898, dport=80, flags="S"))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ tcp_port = p[TCP].sport
+
+ # SYN + ACK packet in->out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
+ TCP(sport=80, dport=tcp_port, flags="SA"))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(1)
+
+ # ACK packet out->in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=service_ip) /
+ TCP(sport=33898, dport=80, flags="A"))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(1)
+
+ # FIN packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
+ TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(1)
+
+ # FIN+ACK packet out -> in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=service_ip) /
+ TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(1)
+
+ # ACK packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
+ TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(1)
+
+ sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n,
+ 0)
+ self.assertEqual(len(sessions) - start_sessnum, 0)
+
def test_tcp_session_close_in(self):
""" Close TCP session from inside network """
self.tcp_port_out = 10505