1 files changed, 59 insertions, 0 deletions
diff --git a/src/validators/bgp-rd-rt b/src/validators/bgp-rd-rt
new file mode 100755
index 000000000..b2b69c9be
--- /dev/null
+++ b/src/validators/bgp-rd-rt
@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 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/>.
+
+from argparse import ArgumentParser
+from vyos.template import is_ipv4
+
+parser = ArgumentParser()
+group = parser.add_mutually_exclusive_group()
+group.add_argument('--route-distinguisher', action='store', help='Validate BGP route distinguisher')
+group.add_argument('--route-target', action='store', help='Validate one BGP route-target')
+group.add_argument('--route-target-multi', action='store', help='Validate multiple, whitespace separated BGP route-targets')
+args = parser.parse_args()
+
+def is_valid(rt):
+    """ Verify BGP RD/RT - both can be verified using the same logic """
+    # every RD/RT (route distinguisher/route target) needs to have a colon and
+    # must consists of two parts
+    value = rt.split(':')
+    if len(value) != 2:
+        return False
+
+    # An RD/RT must either be only numbers, or the first part must be an IPv4
+    # address
+    if (is_ipv4(value[0]) or value[0].isdigit()) and value[1].isdigit():
+        return True
+    return False
+
+if __name__ == '__main__':
+    if args.route_distinguisher:
+        if not is_valid(args.route_distinguisher):
+            exit(1)
+
+    elif args.route_target:
+        if not is_valid(args.route_target):
+            exit(1)
+
+    elif args.route_target_multi:
+        for rt in args.route_target_multi.split(' '):
+            if not is_valid(rt):
+                exit(1)
+
+    else:
+        parser.print_help()
+        exit(1)
+
+    exit(0)