srv6: T591: initial implementation to support locator definition

VyOS CLI

set protocols segment-routing srv6 locator bar prefix '2001:b::/64'
set protocols segment-routing srv6 locator foo behavior-usid
set protocols segment-routing srv6 locator foo prefix '2001:a::/64'

Will generate in FRR

segment-routing
 srv6
  locators
   locator bar
    prefix 2001:b::/64 block-len 40 node-len 24 func-bits 16
   exit
   !
   locator foo
    prefix 2001:a::/64 block-len 40 node-len 24 func-bits 16
    behavior usid
   exit
   !
  exit
  !
 exit
 !
exit

1 files changed, 70 insertions, 0 deletions

diff --git a/smoketest/scripts/cli/test_protocols_segment_routing.py b/smoketest/scripts/cli/test_protocols_segment_routing.py
new file mode 100755
index 000000000..81d42b925
--- /dev/null
+++ b/smoketest/scripts/cli/test_protocols_segment_routing.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2023 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import unittest
+
+from base_vyostest_shim import VyOSUnitTestSHIM
+
+from vyos.configsession import ConfigSessionError
+from vyos.utils.process import cmd
+from vyos.utils.process import process_named_running
+
+base_path = ['protocols', 'segment-routing']
+PROCESS_NAME = 'zebra'
+
+class TestProtocolsSegmentRouting(VyOSUnitTestSHIM.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        # call base-classes classmethod
+        super(TestProtocolsSegmentRouting, cls).setUpClass()
+        # Retrieve FRR daemon PID - it is not allowed to crash, thus PID must remain the same
+        cls.daemon_pid = process_named_running(PROCESS_NAME)
+        # ensure we can also run this test on a live system - so lets clean
+        # out the current configuration :)
+        cls.cli_delete(cls, base_path)
+
+    def tearDown(self):
+        self.cli_delete(base_path)
+        self.cli_commit()
+
+        # check process health and continuity
+        self.assertEqual(self.daemon_pid, process_named_running(PROCESS_NAME))
+
+    def test_srv6(self):
+        locators = {
+            'foo' : { 'prefix' : '2001:a::/64' },
+            'foo' : { 'prefix' : '2001:b::/64', 'usid' : {} },
+        }
+
+        for locator, locator_config in locators.items():
+            self.cli_set(base_path + ['srv6', 'locator', locator, 'prefix', locator_config['prefix']])
+            if 'usid' in locator_config:
+                self.cli_set(base_path + ['srv6', 'locator', locator, 'behavior-usid'])
+
+        self.cli_commit()
+
+        frrconfig = self.getFRRconfig(f'segment-routing', daemon='zebra')
+        self.assertIn(f'segment-routing', frrconfig)
+        self.assertIn(f' srv6', frrconfig)
+        self.assertIn(f'  locators', frrconfig)
+        for locator, locator_config in locators.items():
+            self.assertIn(f'   locator {locator}', frrconfig)
+            self.assertIn(f'    prefix {locator_config["prefix"]} block-len 40 node-len 24 func-bits 16', frrconfig)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)