Re: host name support in pg_hba.conf - Mailing list pgsql-hackers

On mån, 2010-08-09 at 13:56 -0500, Kevin Grittner wrote:
> Peter Eisentraut <peter_e@gmx.net> wrote:
>  
> > The client's IP address (known from the kernel)
>  
> Some machines have several IP addresses; how is that handled?

A connection comes in over exactly one address.
> > is reverse looked up, which results in a host name.
>  
> Some IP addresses have several host names, including in reverse
> lookup; how is that handled?

This is not possible, or at least the C library APIs don't expose it.
Compare the getnameinfo() and getaddrinfo() man pages, for example.