Re: Transport name resolution

[Jakub Zawadzki <darkjames-ws () darkjames pl>]

On Mon, Sep 16, 2013 at 03:17:54PM -0400, Jeff Morriss wrote:
> On 09/16/13 14:57, Guy Harris wrote:
> > On Sep 16, 2013, at 7:20 AM, Anders Broman <anders.broman () ericsson com> wrote:
> >
> > > In serv_name_lookup() we call getservbyport() for ports not resolved in the IANA port list the function
> > > Seems quite expensive so my question is does it add any value or can I remove it?
> >
> > At least on UN*Xes, getservbyport() does one or more of:
> >
> >     1) look in /etc/services, which is probably based on a (possibly-out-of-date) version of, err, umm, the IANA 
> > port list;
> >
> >     2) query some network service to do a lookup - and that service is probably using its own database, based on a 
> > (possibly-out-of-date) version of, err, umm, the IANA port list.
>
> ... possibly with some modifications for local use.  But I imagine the 
> number of people who actually go through the trouble to run a customized 
> service database to be sufficiently few that it's not worth slowing 
> everyone else down for.

It sounds for me as a good Preference option.
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