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Ha,thanks for your link, it's absolutely much clearer and more correct
here, and how do you think of this util function itself?

Kiall Mac Innes <kiall at macinnes.ie>于2016年10月18日周二 上午12:03写道：

> We tend to try stick with the various TEST-NET CIDRs etc as well in
> Designate, and document them here:
>
>
> http://docs.openstack.org/developer/designate/developer-guidelines.html#example-dns-names-and-ip-space
> Thanks,
> Kiall
>
>
> On 17/10/16 10:56, TommyLike Hu wrote:
>
> When I handle some stuff related to Manila recently, I found a case which
> may be suitable for Oslo, Anyhow I put it in the maillist so it can be
> discussed before I put it in action.
> In testcase, we need a function(maybe 2) to generate random ip address (or
> network), also they should in the range of [1](ipv4 documentation range) or
> [2](ipv6 documentation range), this is the draft code for ipv4:
>
> import six
> import random
>
>
> def rand_ipv4(network=False):
>     """This uses the TEST-NET-3 range of reserved IP addresses."""
>
>     test_net_3 = '203.0.113.'
>     if network:
>         host_length = random.randint(0, 8)
>         address_segment = random.randint(0, 8 - host_length)
>         address_segment <<= host_length
>         address = test_net_3 + six.text_type(address_segment)
>         address = '/'.join((address,
>                             six.text_type(32 - host_length)))
>     else:
>         address = test_net_3 + six.text_type(random.randint(0, 255))
>     return address
>
> The primary use case here is writing testcases,  I am not sure whether it
> is suitable here, or maybe I misunderstood the intention of TEST-NET-3,
> please leave any comment you like.
>
>
> [1]  https://tools.ietf.org/html/rfc5737
> [2]  https://tools.ietf.org/html/rfc5156
>
>
>
>
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