Re: IPV4 addresses on IPV6 machines in pg_hba.conf

Andreas Pflug <pgadmin(at)pse-consulting(dot)de> writes:
> Tom Lane wrote:
>> I thought this was still really messy, so I modified it to use a
>> separate "promote v4 address to v6" subroutine. I've applied the
>> attached patch (plus docs). It's not very well tested since I don't
>> have an IPv6 setup here; please check that it does what you want.
>>
> It SEGVs. Reason is that the memcpy of the promote_v4_to_v6_XXX
> functions assumes that the sockaddr_storage is large enough to hold an
> IPV6 address, which appears to be not true.

Drat. That didn't happen when I forced it through that path here, but
I guess it could if getaddrinfo is trying to be conservative about the
amount of memory in its return value. I'll rework it.

> IMHO the struct needs to be created officially by
> getaddrinfo(), which will lead more or less the the same solution I
> posted previously.

No, we just need to use datastructures that are under our control for
the values that will get passed to rangeSockAddr. A few more lines...

regards, tom lane