dns.idl ==> build breaks on non-ipv6 systems
David Holder
david.holder at erion.co.uk
Sat Nov 6 03:50:57 MDT 2010
Hi Michael,
A few thoughts on the patch. May not be relevant as I don't know this
bit of the code well...
1) I notice your constant for address length is set to 39. IPv6
addresses can be 46 characters long.There is a standard constant for
this INET6_ADDRSTRLEN.
2) The code assumes the format uses only colons. It ignores the legal
formats which have dotted-decimal at the end. I don't know if such
addresses will ever appear in this part of the code; has this been
considered? For example, 0000:0000:0000:0000:0000:FFFF:192.168.100.200.
3) I was wondering if the code could be rewritten to use getaddrinfo()
and getnameinfo(). Use of inet_pton and inet_ntop is not best practice
as these are protocol dependent. getaddrinfo() and getnameinfo() can be
used to do protocol independent text to address conversions and vice
versa. With the appropriate flags they can do a lot for you, including
address format checking.
Best Regards,
David
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On 06/11/2010 02:05, Michael Adam wrote:
> Hi Kai and list,
>
> it seems the introduction of the dns server in s4
> has broken the build on non-ipv6 systems by using
> AD_INET6 unconditionally in the pull/push/print_ipv6
> functions in ndr_basic.c
>
> Since these functions are in ndr_basic.c this also
> breaks the build of s3 on non-ipv6-systems.
>
> Attached find a patch that moves these 3 functions
> to a new module ndr_ipv6.c that is only used in s4.
> So this fixes the build in s3. Andrew argued that
> this is no proper fixing, and he is right, but I
> think that these functions deserve their own module
> anyways. The s4 case needs fixing, but I would
> appreciate if you could push (or ACK) this patch first,
> Kai.
>
> Cheers - Michael
>
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