[PATCH RFC v2 0/3] dhclient: add --prefix-len option
H. Peter Anvin
hpa at zytor.com
Wed Dec 2 19:25:26 UTC 2015
On 12/02/15 11:21, H. Peter Anvin wrote:
>
> I have the following questions with regards to the protocol and
> desired behavior:
>
> - The current patch will only emit a null prefix for a SOLICIT
> message, but are there other messages where a null prefix is also
> appropriate?
> - The current patch specifies a global prefix length, but would it be
> better if that prefix length was settable for each IA_PD IAID? In
> that case, what do people think of any of the following command line
> syntaxes (where # is the number of bits):
>
> -P#
> -P=#
> --prefix=#
> -P #
>
> The last one would break if it is possible for a purely numeric
> argument to follow a -P option on the current command line (I don't
> know if there are any systems that use numbers for interface names,
> perhaps?)
>
One final question: why is the t2 parameter of the IAADDR and IAPREFIX
option set to t1 + (t1 / 2) for SOLICIT, mirroring the IA_NA/TA/PD
option, but t1 + 300 for REQUEST, RENEW, and REBIND? I have kept that
behavior in this set as I wanted the first patch to have no functional
changes at all; if implemented properly it should behave exactly like
the old code.
-hpa
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