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Diffstat (limited to 'isys/isys.py')
| -rw-r--r-- | isys/isys.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/isys/isys.py b/isys/isys.py index da51abd4d..7133a6074 100644 --- a/isys/isys.py +++ b/isys/isys.py @@ -444,6 +444,13 @@ def inet_convertNetmaskToPrefix (netmask): return prefix +# Converts IPv4 CIDR prefix to a dotted-quad netmask +def inet_convertPrefixToNetmask (prefix): + (m,) = struct.unpack('I',socket.inet_pton(socket.AF_INET,'255.255.255.255')) + tmp = m >> (32 - int(prefix)) + ret = socket.inet_ntop(socket.AF_INET, struct.pack('i', tmp)) + return ret + def getopt(*args): warnings.warn("isys.getopt is deprecated. Use optparse instead.", DeprecationWarning, stacklevel=2) |