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authorMatus Fabian <matfabia@cisco.com>2017-07-19 08:06:01 -0700
committerFlorin Coras <florin.coras@gmail.com>2017-07-20 06:56:07 +0000
commit93d84c9fc2a839cb4114dbe431a00a58f2a1b168 (patch)
treeb34c57f212357fdb26a8eff74b2759513ba0a57e /test/test_snat.py
parentb12ac56c44f4f6d4d5e3bc37bba39b19bc6b2551 (diff)
SNAT: in2out translation as an output feature (VPP-903)
in2out translation as an output feature on the outside interface (postrouting) Change-Id: I32c0311be09bdf102b9a0885b8b89c7588cb558f Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'test/test_snat.py')
-rw-r--r--test/test_snat.py146
1 files changed, 146 insertions, 0 deletions
diff --git a/test/test_snat.py b/test/test_snat.py
index df81fb56ab5..1db1546a1e7 100644
--- a/test/test_snat.py
+++ b/test/test_snat.py
@@ -615,6 +615,12 @@ class TestSNAT(MethodHolder):
intf.is_inside,
is_add=0)
+ interfaces = self.vapi.snat_interface_output_feature_dump()
+ for intf in interfaces:
+ self.vapi.snat_interface_add_del_output_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
static_mappings = self.vapi.snat_static_mapping_dump()
for sm in static_mappings:
self.vapi.snat_add_static_mapping(sm.local_ip_address,
@@ -2108,6 +2114,146 @@ class TestSNAT(MethodHolder):
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
+ def test_output_feature(self):
+ """ S-NAT interface output feature (in2out postrouting) """
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_output_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # in2out
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ def test_output_feature_vrf_aware(self):
+ """ S-NAT interface output feature VRF aware (in2out postrouting) """
+ nat_ip_vrf10 = "10.0.0.10"
+ nat_ip_vrf20 = "10.0.0.20"
+
+ self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg3.remote_ip4n,
+ next_hop_sw_if_index=self.pg3.sw_if_index,
+ table_id=10)
+ self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg3.remote_ip4n,
+ next_hop_sw_if_index=self.pg3.sw_if_index,
+ table_id=20)
+
+ self.snat_add_address(nat_ip_vrf10, vrf_id=10)
+ self.snat_add_address(nat_ip_vrf20, vrf_id=20)
+ self.vapi.snat_interface_add_del_output_feature(self.pg4.sw_if_index)
+ self.vapi.snat_interface_add_del_output_feature(self.pg6.sw_if_index)
+ self.vapi.snat_interface_add_del_output_feature(self.pg3.sw_if_index,
+ is_inside=0)
+
+ # in2out VRF 10
+ pkts = self.create_stream_in(self.pg4, self.pg3)
+ self.pg4.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=nat_ip_vrf10)
+
+ # out2in VRF 10
+ pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf10)
+ self.pg3.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg4.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg4)
+
+ # in2out VRF 20
+ pkts = self.create_stream_in(self.pg6, self.pg3)
+ self.pg6.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=nat_ip_vrf20)
+
+ # out2in VRF 20
+ pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf20)
+ self.pg3.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg6.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg6)
+
+ def _test_output_feature_hairpinning(self):
+ """ S-NAT interface output feature hairpinning (in2out postrouting) """
+ host = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ host_in_port = 1234
+ host_out_port = 0
+ server_in_port = 5678
+ server_out_port = 8765
+
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_output_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # add static mapping for server
+ self.snat_add_static_mapping(server.ip4, self.snat_addr,
+ server_in_port, server_out_port,
+ proto=IP_PROTOS.tcp)
+
+ # send packet from host to server
+ p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
+ IP(src=host.ip4, dst=self.snat_addr) /
+ TCP(sport=host_in_port, dport=server_out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.snat_addr)
+ self.assertEqual(ip.dst, server.ip4)
+ self.assertNotEqual(tcp.sport, host_in_port)
+ self.assertEqual(tcp.dport, server_in_port)
+ self.check_tcp_checksum(p)
+ host_out_port = tcp.sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # send reply from server to host
+ p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
+ IP(src=server.ip4, dst=self.snat_addr) /
+ TCP(sport=server_in_port, dport=host_out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.snat_addr)
+ self.assertEqual(ip.dst, host.ip4)
+ self.assertEqual(tcp.sport, server_out_port)
+ self.assertEqual(tcp.dport, host_in_port)
+ self.check_tcp_checksum(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ raise
+
def tearDown(self):
super(TestSNAT, self).tearDown()
if not self.vpp_dead: