Re: determining an endpoint's family - endpoint_type/protocol_type?

Great! Thanks :)

Richard

On 11/20/06, Christopher Kohlhoff 
<chris-34HiQXrhQN1Wk0Htik3J/w@xxxxxxxxxxxxxxxx> wrote:
> Hi Richard,
>
> Richard Dingwall <rdingwall-Re5JQEeQqe8AvxtiuMwx3w@xxxxxxxxxxxxxxxx> wrote:
> > I am developing an FTP client with boost::asio, and I wish to
> > determine whether an endpoint (generated by a resolver) is
> > IPv4 or IPv6.
> >
> > The only way I can see how is to compare
> > endpoint.protocol().family() with AF_INET and AF_INET6, which
> > doesn't feel like the right way. An alternative would be to
> > specify the desired family before the host is resolved, or to
> > simply compare the endpoint's family against some predefined
> > boost::asio::ip::ipv6/ipv4 members.
> >
> > The difference between IPv4 and IPv6 is quite significant for
> > FTP, as they require a different set of (mostly incompatible)
> > commands to negotiate data connections.
> >
> > Any suggestions? (Probably I have missed something :)
>
> If you're using the version in CVS you can use
> endp.address().is_v4() or endp.address().is_v6().
>
> Another method in the TR2 proposal but not yet in CVS is the
> ability to test protocol objects for equality, e.g.:
>
>   endp.protocol() == ip::tcp::v4()
>
> This seems to me to be the more natural expression for your use
> case, so I will make this change right away.
>
> Cheers,
> Chris
>
>
>
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