BFD: add get echo source API (VPP-1367)

Change-Id: I45f540128e038ddb17ba96ce30965e8f7c732067
Signed-off-by: Matus Fabian <matfabia@cisco.com>

2 files changed, 48 insertions, 0 deletions

diff --git a/test/test_bfd.py b/test/test_bfd.py
index f14ff71b341..a7f2b93982b 100644
--- a/test/test_bfd.py
+++ b/test/test_bfd.py
@@ -252,6 +252,51 @@ class BFDAPITestCase(VppTestCase):
         session.add_vpp_config()
         session.activate_auth(key2)
 
+    def test_set_del_udp_echo_source(self):
+        """ set/del udp echo source """
+        self.create_loopback_interfaces(1)
+        self.loopback0 = self.lo_interfaces[0]
+        self.loopback0.admin_up()
+        echo_source = self.vapi.bfd_udp_get_echo_source()
+        self.assertFalse(echo_source.is_set)
+        self.assertFalse(echo_source.have_usable_ip4)
+        self.assertFalse(echo_source.have_usable_ip6)
+
+        self.vapi.bfd_udp_set_echo_source(self.loopback0.sw_if_index)
+        echo_source = self.vapi.bfd_udp_get_echo_source()
+        self.assertTrue(echo_source.is_set)
+        self.assertEqual(echo_source.sw_if_index, self.loopback0.sw_if_index)
+        self.assertFalse(echo_source.have_usable_ip4)
+        self.assertFalse(echo_source.have_usable_ip6)
+
+        self.loopback0.config_ip4()
+        unpacked = unpack("!L", self.loopback0.local_ip4n)
+        echo_ip4 = pack("!L", unpacked[0] ^ 1)
+        echo_source = self.vapi.bfd_udp_get_echo_source()
+        self.assertTrue(echo_source.is_set)
+        self.assertEqual(echo_source.sw_if_index, self.loopback0.sw_if_index)
+        self.assertTrue(echo_source.have_usable_ip4)
+        self.assertEqual(echo_source.ip4_addr, echo_ip4)
+        self.assertFalse(echo_source.have_usable_ip6)
+
+        self.loopback0.config_ip6()
+        unpacked = unpack("!LLLL", self.loopback0.local_ip6n)
+        echo_ip6 = pack("!LLLL", unpacked[0], unpacked[1], unpacked[2],
+                        unpacked[3] ^ 1)
+        echo_source = self.vapi.bfd_udp_get_echo_source()
+        self.assertTrue(echo_source.is_set)
+        self.assertEqual(echo_source.sw_if_index, self.loopback0.sw_if_index)
+        self.assertTrue(echo_source.have_usable_ip4)
+        self.assertEqual(echo_source.ip4_addr, echo_ip4)
+        self.assertTrue(echo_source.have_usable_ip6)
+        self.assertEqual(echo_source.ip6_addr, echo_ip6)
+
+        self.vapi.bfd_udp_del_echo_source()
+        echo_source = self.vapi.bfd_udp_get_echo_source()
+        self.assertFalse(echo_source.is_set)
+        self.assertFalse(echo_source.have_usable_ip4)
+        self.assertFalse(echo_source.have_usable_ip6)
+
 
 @unittest.skipUnless(running_extended_tests(), "part of extended tests")
 class BFDTestSession(object):
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index 5ef1b309e06..a51dea4685e 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -2272,6 +2272,9 @@ class VppPapiProvider(object):
     def bfd_udp_del_echo_source(self):
         return self.api(self.papi.bfd_udp_del_echo_source, {})
 
+    def bfd_udp_get_echo_source(self):
+        return self.api(self.papi.bfd_udp_get_echo_source, {})
+
     def classify_add_del_table(
             self,
             is_add,