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authorMatus Fabian <matfabia@cisco.com>2017-01-18 01:46:01 -0800
committerMatus Fabian <matfabia@cisco.com>2017-01-23 03:04:53 -0800
commit675a69cdf6eb1a8e60613bef4a918fe1b354c276 (patch)
tree610fc7aaaa983c96d5cbd01526cccecc1b644118 /test
parent8b275371d1487958d9469d2be8f5330ee8197d04 (diff)
SNAT: Multiple inside interfaces (VPP-447)
NAT only packets aimed at outside interface and in case of hairpinning Change-Id: Ida371380fce664b9434ca5ddd2369c980ff26beb Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'test')
-rw-r--r--test/test_snat.py111
1 files changed, 86 insertions, 25 deletions
diff --git a/test/test_snat.py b/test/test_snat.py
index 1abb3daaa40..09fdb108c0b 100644
--- a/test/test_snat.py
+++ b/test/test_snat.py
@@ -41,11 +41,19 @@ class TestSNAT(VppTestCase):
cls.overlapping_interfaces = list(list(cls.pg_interfaces[4:7]))
+ cls.pg4._local_ip4 = "172.16.255.1"
+ cls.pg4._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg4._remote_hosts[0]._ip4 = "172.16.255.2"
+ cls.pg4.set_table_ip4(10)
+ cls.pg5._local_ip4 = "172.16.255.3"
+ cls.pg5._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg5._remote_hosts[0]._ip4 = "172.16.255.4"
+ cls.pg5.set_table_ip4(10)
+ cls.pg6._local_ip4 = "172.16.255.1"
+ cls.pg6._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg6._remote_hosts[0]._ip4 = "172.16.255.2"
+ cls.pg6.set_table_ip4(20)
for i in cls.overlapping_interfaces:
- i._local_ip4 = "172.16.255.1"
- i._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
- i._remote_hosts[0]._ip4 = "172.16.255.2"
- i.set_table_ip4(i.sw_if_index)
i.config_ip4()
i.admin_up()
i.resolve_arp()
@@ -178,6 +186,29 @@ class TestSNAT(VppTestCase):
"(inside network):", packet))
raise
+ def verify_capture_no_translation(self, capture, ingress_if, egress_if):
+ """
+ Verify captured packet that don't have to be translated
+
+ :param capture: Captured packets
+ :param ingress_if: Ingress interface
+ :param egress_if: Egress interface
+ """
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].src, ingress_if.remote_ip4)
+ self.assertEqual(packet[IP].dst, egress_if.remote_ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, self.tcp_port_in)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].sport, self.udp_port_in)
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
+ raise
+
def verify_ipfix_nat44_ses(self, data):
"""
Verify IPFIX NAT44 session create/delete event
@@ -462,9 +493,9 @@ class TestSNAT(VppTestCase):
self.icmp_id_out = 6305
self.snat_add_static_mapping(self.pg4.remote_ip4, nat_ip1,
- vrf_id=self.pg4.sw_if_index)
+ vrf_id=10)
self.snat_add_static_mapping(self.pg0.remote_ip4, nat_ip2,
- vrf_id=self.pg4.sw_if_index)
+ vrf_id=10)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
@@ -494,10 +525,25 @@ class TestSNAT(VppTestCase):
self.snat_add_address(self.snat_addr)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index)
- self.vapi.snat_interface_add_del_feature(self.pg2.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
+ # between two S-NAT inside interfaces (no translation)
+ 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_no_translation(capture, self.pg0, self.pg1)
+
+ # from S-NAT inside to interface without S-NAT feature (no translation)
+ pkts = self.create_stream_in(self.pg0, self.pg2)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg2.get_capture(len(pkts))
+ self.verify_capture_no_translation(capture, self.pg0, self.pg2)
+
# in2out 1st interface
pkts = self.create_stream_in(self.pg0, self.pg3)
self.pg0.add_stream(pkts)
@@ -530,31 +576,46 @@ class TestSNAT(VppTestCase):
capture = self.pg1.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg1)
- # in2out 3rd interface
- pkts = self.create_stream_in(self.pg2, self.pg3)
- self.pg2.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)
-
- # out2in 3rd interface
- pkts = self.create_stream_out(self.pg3)
- self.pg3.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg2.get_capture(len(pkts))
- self.verify_capture_in(capture, self.pg2)
-
def test_inside_overlapping_interfaces(self):
""" SNAT multiple inside interfaces with overlapping address space """
+ static_nat_ip = "10.0.0.10"
self.snat_add_address(self.snat_addr)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
self.vapi.snat_interface_add_del_feature(self.pg4.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg5.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg6.sw_if_index)
+ self.snat_add_static_mapping(self.pg6.remote_ip4, static_nat_ip,
+ vrf_id=20)
+
+ # between S-NAT inside interfaces with same VRF (no translation)
+ pkts = self.create_stream_in(self.pg4, self.pg5)
+ self.pg4.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg5.get_capture(len(pkts))
+ self.verify_capture_no_translation(capture, self.pg4, self.pg5)
+
+ # between S-NAT inside interfaces with different VRF (hairpinning)
+ p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
+ IP(src=self.pg4.remote_ip4, dst=static_nat_ip) /
+ TCP(sport=1234, dport=5678))
+ self.pg4.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg6.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.snat_addr)
+ self.assertEqual(ip.dst, self.pg6.remote_ip4)
+ self.assertNotEqual(tcp.sport, 1234)
+ self.assertEqual(tcp.dport, 5678)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
# in2out 1st interface
pkts = self.create_stream_in(self.pg4, self.pg3)
@@ -594,10 +655,10 @@ class TestSNAT(VppTestCase):
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg3.get_capture(len(pkts))
- self.verify_capture_out(capture)
+ self.verify_capture_out(capture, static_nat_ip, True)
# out2in 3rd interface
- pkts = self.create_stream_out(self.pg3)
+ pkts = self.create_stream_out(self.pg3, static_nat_ip)
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()