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-rw-r--r--test/test_nat.py60
-rw-r--r--test/vpp_papi_provider.py33
2 files changed, 93 insertions, 0 deletions
diff --git a/test/test_nat.py b/test/test_nat.py
index 9879b762cc9..516961739b8 100644
--- a/test/test_nat.py
+++ b/test/test_nat.py
@@ -4269,6 +4269,7 @@ class TestNAT44EndpointDependent(MethodHolder):
local_port = 8080
server1 = self.pg0.remote_hosts[0]
server2 = self.pg0.remote_hosts[1]
+ server3 = self.pg0.remote_hosts[2]
locals = [{'addr': server1.ip4n,
'port': local_port,
@@ -4309,6 +4310,65 @@ class TestNAT44EndpointDependent(MethodHolder):
server2_n += 1
self.assertGreater(server1_n, server2_n)
+ # add new back-end
+ self.vapi.nat44_lb_static_mapping_add_del_local(external_addr_n,
+ external_port,
+ server3.ip4n,
+ local_port,
+ IP_PROTOS.tcp,
+ 20)
+ server1_n = 0
+ server2_n = 0
+ server3_n = 0
+ clients = ip4_range(self.pg1.remote_ip4, 60, 110)
+ pkts = []
+ for client in clients:
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=client, dst=self.nat_addr) /
+ TCP(sport=12346, dport=external_port))
+ pkts.append(p)
+ self.assertGreater(len(pkts), 0)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for p in capture:
+ if p[IP].dst == server1.ip4:
+ server1_n += 1
+ elif p[IP].dst == server2.ip4:
+ server2_n += 1
+ else:
+ server3_n += 1
+ self.assertGreater(server1_n, 0)
+ self.assertGreater(server2_n, 0)
+ self.assertGreater(server3_n, 0)
+
+ # remove one back-end
+ self.vapi.nat44_lb_static_mapping_add_del_local(external_addr_n,
+ external_port,
+ server2.ip4n,
+ local_port,
+ IP_PROTOS.tcp,
+ 10,
+ is_add=0)
+ server1_n = 0
+ server2_n = 0
+ server3_n = 0
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for p in capture:
+ if p[IP].dst == server1.ip4:
+ server1_n += 1
+ elif p[IP].dst == server2.ip4:
+ server2_n += 1
+ else:
+ server3_n += 1
+ self.assertGreater(server1_n, 0)
+ self.assertEqual(server2_n, 0)
+ self.assertGreater(server3_n, 0)
+
def test_static_lb_2(self):
""" NAT44 local service load balancing (asymmetrical rule) """
external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index 0a33c1eb2ac..4ab4380692e 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -1668,6 +1668,39 @@ class VppPapiProvider(object):
'local_num': local_num,
'locals': locals})
+ def nat44_lb_static_mapping_add_del_local(
+ self,
+ external_addr,
+ external_port,
+ local_addr,
+ local_port,
+ protocol,
+ probability,
+ vrf_id=0,
+ is_add=1):
+ """Add/delete NAT44 load-balancing static mapping rule backend
+
+ :param external_addr: external IPv4 address of the servic
+ :param external_port: external L4 port number of the service
+ :param local_addr: IPv4 address of the internal node
+ :param local_port: L4 port number of the internal node
+ :param protocol: IP protocol number
+ :param probability: probability of the internal node
+ :param vrf_id: VRF id of the internal node
+ :param is_add: 1 if add, 0 if delete
+ """
+ return self.api(
+ self.papi.nat44_lb_static_mapping_add_del_local,
+ {'is_add': is_add,
+ 'external_addr': external_addr,
+ 'external_port': external_port,
+ 'local': {
+ 'addr': local_addr,
+ 'port': local_port,
+ 'probability': probability,
+ 'vrf_id': vrf_id},
+ 'protocol': protocol})
+
def nat44_lb_static_mapping_dump(self):
"""Dump NAT44 load balancing static mappings