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-rw-r--r--lib/python/apex/__init__.py9
-rw-r--r--lib/python/apex/ip_utils.py54
2 files changed, 63 insertions, 0 deletions
diff --git a/lib/python/apex/__init__.py b/lib/python/apex/__init__.py
new file mode 100644
index 00000000..0c0ae6c6
--- /dev/null
+++ b/lib/python/apex/__init__.py
@@ -0,0 +1,9 @@
+##############################################################################
+# Copyright (c) 2016 Feng Pan (fpan@redhat.com) and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
diff --git a/lib/python/apex/ip_utils.py b/lib/python/apex/ip_utils.py
new file mode 100644
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--- /dev/null
+++ b/lib/python/apex/ip_utils.py
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+
+##############################################################################
+# Copyright (c) 2016 Feng Pan (fpan@redhat.com) and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+
+import ipaddress
+
+
+def generate_ip_range(args):
+ """
+ Generate IP range in string format for given CIDR.
+ This function works for both IPv4 and IPv6.
+
+ args is expected to contain the following members:
+ CIDR: any valid CIDR representation.
+ start_position: starting index, default to first address in subnet (1)
+ end_position: ending index, default to last address in subnet (-1)
+
+ Returns IP range in string format. A single IP is returned if start and end IPs are identical.
+ """
+ cidr = ipaddress.ip_network(args.CIDR)
+ (start_index, end_index) = (args.start_position, args.end_position)
+ if cidr[start_index] == cidr[end_index]:
+ return str(cidr[start_index])
+ else:
+ return ','.join(sorted([str(cidr[start_index]), str(cidr[end_index])]))
+
+
+def main():
+ import argparse
+ import sys
+
+ parser = argparse.ArgumentParser()
+ subparsers = parser.add_subparsers()
+
+ parser_gen_ip_range = subparsers.add_parser('generate_ip_range', help='Generate IP Range given CIDR')
+ parser_gen_ip_range.add_argument('CIDR', help='Network in CIDR notation')
+ parser_gen_ip_range.add_argument('start_position', type=int, help='Starting index')
+ parser_gen_ip_range.add_argument('end_position', type=int, help='Ending index')
+ parser_gen_ip_range.set_defaults(func=generate_ip_range)
+
+ args = parser.parse_args(sys.argv[1:])
+ print(args.func(args))
+
+
+if __name__ == '__main__':
+ main()
+