policy: T4660: Changed CLI syntax in route-map set community

Changed CLI syntax in route-map set community,
set large-community, set extcommunity
Allows to add multiple communities, large-communities
and extcommunities in clear view.
Added new well-known communities.
Added non-transitive feature in extcommunities.
Fixed community's validators.

1 files changed, 55 insertions, 0 deletions

diff --git a/src/validators/bgp-extended-community b/src/validators/bgp-extended-community
new file mode 100755
index 000000000..b69ae3449
--- /dev/null
+++ b/src/validators/bgp-extended-community
@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+# Copyright 2019-2022 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+from argparse import ArgumentParser
+from sys import exit
+
+from vyos.template import is_ipv4
+
+COMM_MAX_2_OCTET: int = 65535
+COMM_MAX_4_OCTET: int = 4294967295
+
+if __name__ == '__main__':
+    # add an argument with community
+    parser: ArgumentParser = ArgumentParser()
+    parser.add_argument('community', type=str)
+    args = parser.parse_args()
+    community: str = args.community
+    if community.count(':') != 1:
+        print("Invalid community format")
+        exit(1)
+    try:
+        # try to extract community parts from an argument
+        comm_left: str = community.split(':')[0]
+        comm_right: int = int(community.split(':')[1])
+
+        # check if left part is an IPv4 address
+        if is_ipv4(comm_left) and 0 <= comm_right <= COMM_MAX_2_OCTET:
+            exit()
+        # check if a left part is a number
+        if 0 <= int(comm_left) <= COMM_MAX_2_OCTET \
+                and 0 <= comm_right <= COMM_MAX_4_OCTET:
+            exit()
+
+    except Exception:
+        # fail if something was wrong
+        print("Invalid community format")
+        exit(1)
+
+    # fail if none of validators catched the value
+    print("Invalid community format")
+    exit(1)
\ No newline at end of file