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authorMatus Fabian <matfabia@cisco.com>2017-02-10 03:48:01 -0800
committerOle Trøan <otroan@employees.org>2017-03-07 12:47:12 +0000
commit066f034b903bda6e938bec1b12f01edef65ee9c4 (patch)
treeddb4a1eb0878fe7ac58f25056f3bb7c6ad0bae3a /test
parenteab38d91e8db5ad271598a63781a7afa3bd8b5ea (diff)
CGN: Deterministic NAT (VPP-623)
Inside user is statically mapped to a set of outside ports. Support endpoint dependent mapping to deal with overloading of the outside ports. Change-Id: I8014438744597a976f8ae459283e8b91f63b7f72 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'test')
-rw-r--r--test/test_snat.py52
-rw-r--r--test/vpp_papi_provider.py48
2 files changed, 100 insertions, 0 deletions
diff --git a/test/test_snat.py b/test/test_snat.py
index f5e6e139..78919a02 100644
--- a/test/test_snat.py
+++ b/test/test_snat.py
@@ -1276,5 +1276,57 @@ class TestSNAT(VppTestCase):
self.clear_snat()
+class TestDeterministicNAT(VppTestCase):
+ """ Deterministic NAT Test Cases """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestDeterministicNAT, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["snat", "{", "deterministic", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDeterministicNAT, cls).setUpClass()
+
+ try:
+ cls.create_pg_interfaces(range(2))
+ cls.interfaces = list(cls.pg_interfaces)
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ except Exception:
+ super(TestDeterministicNAT, cls).tearDownClass()
+ raise
+
+ def test_deterministic_mode(self):
+ """ S-NAT run deterministic mode """
+ in_addr = '172.16.255.0'
+ out_addr = '172.17.255.50'
+ in_addr_t = '172.16.255.20'
+ in_addr_n = socket.inet_aton(in_addr)
+ out_addr_n = socket.inet_aton(out_addr)
+ in_addr_t_n = socket.inet_aton(in_addr_t)
+ in_plen = 24
+ out_plen = 32
+
+ snat_config = self.vapi.snat_show_config()
+ self.assertEqual(1, snat_config.deterministic)
+
+ self.vapi.snat_add_det_map(in_addr_n, in_plen, out_addr_n, out_plen)
+
+ rep1 = self.vapi.snat_det_forward(in_addr_t_n)
+ self.assertEqual(rep1.out_addr[:4], out_addr_n)
+ rep2 = self.vapi.snat_det_reverse(out_addr_n, rep1.out_port_hi)
+ self.assertEqual(rep2.in_addr[:4], in_addr_t_n)
+
+ def tearDown(self):
+ super(TestDeterministicNAT, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show snat detail"))
+
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index c7e875f0..b9c4d0c1 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -1123,6 +1123,54 @@ class VppPapiProvider(object):
"""
return self.api(self.papi.snat_user_dump, {})
+ def snat_add_det_map(
+ self,
+ in_addr,
+ in_plen,
+ out_addr,
+ out_plen,
+ is_add=1):
+ """Add/delete S-NAT deterministic mapping
+
+ :param is_add - 1 if add, 0 if delete
+ :param in_addr - inside IP address
+ :param in_plen - inside IP address prefix length
+ :param out_addr - outside IP address
+ :param out_plen - outside IP address prefix length
+ """
+ return self.api(
+ self.papi.snat_add_det_map,
+ {'is_add': is_add,
+ 'in_addr': in_addr,
+ 'in_plen': in_plen,
+ 'out_addr': out_addr,
+ 'out_plen': out_plen})
+
+ def snat_det_forward(
+ self,
+ in_addr):
+ """Get outside address and port range from inside address
+
+ :param in_addr - inside IP address
+ """
+ return self.api(
+ self.papi.snat_det_forward,
+ {'in_addr': in_addr})
+
+ def snat_det_reverse(
+ self,
+ out_addr,
+ out_port):
+ """Get inside address from outside address and port
+
+ :param out_addr - outside IP address
+ :param out_port - outside port
+ """
+ return self.api(
+ self.papi.snat_det_reverse,
+ {'out_addr': out_addr,
+ 'out_port': out_port})
+
def control_ping(self):
self.api(self.papi.control_ping)