This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author claymation
Recipients Rhamphoryncus, benjamin.peterson, claymation, ezio.melotti, giampaolo.rodola, gregory.p.smith, gvanrossum, loewis, mattsmart, oubiwann, pitrou, pmoody, pnasrat, r.david.murray, shields
Date 2009-06-02.02:03:07
SpamBayes Score 6.246872e-07
Marked as misclassified No
Message-id <8657ee3f0906011903o521ba1feo6a8d543b5f9ee130@mail.gmail.com>
In-reply-to <8517e9350906011651o4290790bm26a08e0552fc3602@mail.gmail.com>
Content
On Mon, Jun 1, 2009 at 7:51 PM, pmoody <report@bugs.python.org> wrote:

>> For an example of why 192.168.1.1 != 192.168.1.1/32, look no further
>> than ifconfig:
>>
>> # ifconfig en0 192.168.1.1/32
>> # ifconfig en0
>> en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>>        inet 192.168.1.1 netmask 0xffffffff broadcast 192.168.1.1
>>        ...
>>
>> # ifconfig en0 192.168.1.1
>> # ifconfig en0
>> en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>>        inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
>>        ...
>
> what this shows is that your copy of darwin defaults to a /24
> prefixlen; ipaddr assumes a /32 prefixlen.  I don't see anything
> particularly *more* intuitive with darwin, but in any event, it seems
> to provide support for assuming a prefixlen when none is supplied.

The example demonstrates one case where the strings '192.168.1.1' and
'192.168.1.1/32' are not equivalent -- it wouldn't be hard to find
other examples -- yet you seem to think that (a) this is
Darwin-specific behavior, and that (b) this discrepancy is acceptable
and does not constitute a design flaw.

You're wrong on both fronts, since in fact all IP implementations
understand classful addressing (as per RFC-791), not just Darwin, and
your insistence on the equality of '192.168.1.1' and '192.168.1.1/32'
means that your library is unusable in applications that pass
ipaddr.IPv4 objects to ifconfig.

Clay
History
Date User Action Args
2009-06-02 02:03:10claymationsetrecipients: + claymation, gvanrossum, loewis, gregory.p.smith, Rhamphoryncus, pitrou, giampaolo.rodola, benjamin.peterson, ezio.melotti, mattsmart, shields, pmoody, pnasrat, r.david.murray, oubiwann
2009-06-02 02:03:08claymationlinkissue3959 messages
2009-06-02 02:03:07claymationcreate