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-rwxr-xr-xsrc/system/normalize-ip43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/system/normalize-ip b/src/system/normalize-ip
new file mode 100755
index 000000000..08f922a8e
--- /dev/null
+++ b/src/system/normalize-ip
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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/>.
+#
+#
+
+# Normalizes IPv6 addresses so that they can be passed to iproute2,
+# since iproute2 will not take an address with leading zeroes for an argument
+
+import re
+import sys
+import ipaddress
+
+
+if __name__ == '__main__':
+ if len(sys.argv) < 2:
+ print("Argument required")
+ sys.exit(1)
+
+ address_string, prefix_length = re.match(r'(.+)/(.+)', sys.argv[1]).groups()
+
+ try:
+ address = ipaddress.IPv6Address(address_string)
+ normalized_address = address.compressed
+ except ipaddress.AddressValueError:
+ # It's likely an IPv4 address, do nothing
+ normalized_address = address_string
+
+ print("{0}/{1}".format(normalized_address, prefix_length))
+ sys.exit(0)
+