diff options
Diffstat (limited to 'test/test_nat.py')
| -rw-r--r-- | test/test_nat.py | 82 |
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 |