diff options
Diffstat (limited to 'scripts/rpki/ipaddrs.py')
| -rw-r--r-- | scripts/rpki/ipaddrs.py | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/scripts/rpki/ipaddrs.py b/scripts/rpki/ipaddrs.py index 73e404ca..26beb4a1 100644 --- a/scripts/rpki/ipaddrs.py +++ b/scripts/rpki/ipaddrs.py @@ -1,14 +1,28 @@ # $Id$ +"""Classes to represent IP addresses. + +Given some of the other operations we need to perform on them, it's +most convenient to represent IP addresses as Python "long" values. +The classes in this module just wrap suitable read/write syntax around +the underlying "long" type. + +These classes also supply a "bits" attribute for use by other code +built on these classes; for the most part, IPv6 addresses really are +just IPv4 addresses with more bits, so we supply the number of bits +once, here, thus avoiding a lot of duplicate code elsewhere. +""" + import socket, struct class v4addr(long): - """ - IPv4 address. Derived from long, but supports IPv4 print syntax. + """IPv4 address. + + Derived from long, but supports IPv4 print syntax. """ bits = 32 - + def __new__(cls, x): if isinstance(x, str): y = struct.unpack("!I", socket.inet_pton(socket.AF_INET, x)) @@ -19,8 +33,9 @@ class v4addr(long): return socket.inet_ntop(socket.AF_INET, struct.pack("!I", long(self))) class v6addr(long): - """ - IPv6 address. Derived from long, but supports IPv6 print syntax. + """IPv6 address. + + Derived from long, but supports IPv6 print syntax. """ bits = 128 |