bgp: T5930: Denied using rt vpn 'export/import' with 'both' together

Denied using command 'route-target vpn export/import'
with 'both' together in bgp configuration.

3 files changed, 77 insertions, 2 deletions

diff --git a/interface-definitions/include/version/bgp-version.xml.i b/interface-definitions/include/version/bgp-version.xml.i
index 1386ea9bc..6bed7189f 100644
--- a/interface-definitions/include/version/bgp-version.xml.i
+++ b/interface-definitions/include/version/bgp-version.xml.i
@@ -1,3 +1,3 @@
 <!-- include start from include/version/bgp-version.xml.i -->
-<syntaxVersion component='bgp' version='4'></syntaxVersion>
+<syntaxVersion component='bgp' version='5'></syntaxVersion>
 <!-- include end -->
diff --git a/src/conf_mode/protocols_bgp.py b/src/conf_mode/protocols_bgp.py
index f6f3370c3..d90dfe45b 100755
--- a/src/conf_mode/protocols_bgp.py
+++ b/src/conf_mode/protocols_bgp.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2020-2023 VyOS maintainers and contributors
+# Copyright (C) 2020-2024 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
@@ -509,6 +509,14 @@ def verify(bgp):
                     if verify_vrf_as_import(vrf_name, afi, bgp['dependent_vrfs']):
                         raise ConfigError(
                             'Command "import vrf" conflicts with "route-target vpn both" command!')
+                    if dict_search('route_target.vpn.export', afi_config):
+                        raise ConfigError(
+                            'Command "route-target vpn export" conflicts '\
+                            'with "route-target vpn both" command!')
+                    if dict_search('route_target.vpn.import', afi_config):
+                        raise ConfigError(
+                            'Command "route-target vpn import" conflicts '\
+                            'with "route-target vpn both" command!')
 
                 if dict_search('route_target.vpn.import', afi_config):
                     if verify_vrf_as_import(vrf_name, afi, bgp['dependent_vrfs']):
diff --git a/src/migration-scripts/bgp/4-to-5 b/src/migration-scripts/bgp/4-to-5
new file mode 100755
index 000000000..c4eb9ec72
--- /dev/null
+++ b/src/migration-scripts/bgp/4-to-5
@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2024 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/>.
+
+# Delete 'protocols bgp address-family ipv6-unicast route-target vpn
+# import/export', if 'protocols bgp address-family ipv6-unicast
+# route-target vpn both' exists
+
+from sys import argv
+from sys import exit
+
+from vyos.configtree import ConfigTree
+
+if len(argv) < 2:
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+
+bgp_base = ['protocols', 'bgp']
+# Delete 'import/export' in default vrf if 'both' exists
+if config.exists(bgp_base):
+    for address_family in ['ipv4-unicast', 'ipv6-unicast']:
+        rt_path = bgp_base + ['address-family', address_family, 'route-target',
+                              'vpn']
+        if config.exists(rt_path + ['both']):
+            if config.exists(rt_path + ['import']):
+                config.delete(rt_path + ['import'])
+            if config.exists(rt_path + ['export']):
+                config.delete(rt_path + ['export'])
+
+# Delete import/export in vrfs if both exists
+if config.exists(['vrf', 'name']):
+    for vrf in config.list_nodes(['vrf', 'name']):
+        vrf_base = ['vrf', 'name', vrf]
+        for address_family in ['ipv4-unicast', 'ipv6-unicast']:
+            rt_path = vrf_base + bgp_base + ['address-family', address_family,
+                                             'route-target', 'vpn']
+            if config.exists(rt_path + ['both']):
+                if config.exists(rt_path + ['import']):
+                    config.delete(rt_path + ['import'])
+                if config.exists(rt_path + ['export']):
+                    config.delete(rt_path + ['export'])
+
+try:
+    with open(file_name, 'w') as f:
+        f.write(config.to_string())
+except OSError as e:
+    print(f'Failed to save the modified config: {e}')
+    exit(1)