On mån, 2010-08-09 at 13:56 -0500, Kevin Grittner wrote:
> Peter Eisentraut <peter_e(at)gmx(dot)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.