RE: TCP/IP Address

[Tim McCarthy <TimM@xxxxxxxxxxxxxxxxxx>]

Be careful here. getdomainname and gethostname will retrieve the
AS/400's domain name and host name as set up via CHGTCPDMN. You could
use this as long as you're sure the PC's either have this name and the
correct IP address in their hosts table or DNS server table. The
gethostid only returns the IP address previously set by a sethostid
function and is not appropriate for what you want. Remember the AS/400
can be a multi-homed machine and as such does NOT have a single unique
IP address. If you need an IP address you'll have to retrieve that from
the interface definition. 

By the way, we have a number of customers that already use the technique
you  describe of creating FTP script files and .BAT files on the fly to
send to remote PC's. This is a nice way to start jobs on a PC that need
to process files you've just downloaded. You can even use port
"tickling" mechanisms to be notified when these BAT jobs end.

> -----Original Message-----
> From: Shannon O'Donnell [SMTP:orion@auburnctnet.com]
> Sent: Tuesday, February 23, 1999 9:24 AM
> To:   MIDRANGE-L@midrange.com
> Subject:      Re: TCP/IP Address
> 
> Thanks Jeffrey!  That's exactly what I was looking for. Someone else
> had
> posted something about the gethosts earlier, but I wasn't sure just
> what
> that was till now.  That's exactly the answer I was looking for.
> 
> Thanks to everyone who responded to this question.  I just love this
> forum! You get such a great mix of responses, each one helpful in its
> own way!
> 
> Thanks everyone.
> 
> Shannon O'Donnell
> 
> 
> Jeffrey Silberberg wrote:
> 
> > Shannon,
> >
> >         In the IP world you already have every thing you need, if
> > things are
> > setup correctly. The
> > IP dotted decimal address is normally referenced by a symbolic in
> one
> > of two
> > places and
> > sometimes both.
> >
> >         First there is a concept of a Domain Name Server (DNS) the
> DNS
> > has a
> > number of components
> > but it's primary function is to provide a mapping from a fully
> > qualified
> > symbolic host name to the IP address
> > and back again.  Also, for most IP stacks available on the market an
> > independent system can have a
> > "host" table, also known as "lmhosts", this can override the DNS
> > and/or
> > serve as a supplement to it.
> >
> >         Now, if I wanted to distribute a script to a one hundred
> > locations
> > that always sent to a "common"
> > AS/400 (or any host for that matter) then I would use a symbolic
> name
> > in the
> > FTP script such as
> > "ftp myas400.mycompany.com"  this would resolve the
> > myas400.mycompany.com
> > into a doted
> > decimal address by first looking in the host table, and then to the
> > local
> > DNS, and then to the Internet DNS,
> > etc...  Based on what is defined in the
> > system/network/routers/gateways/........
> >
> >         Okay, now that I have done all that I will give you one
> other
> > answer.  In the standard API's available for
> > IP connections there is a series of "GETHOST..." calls.  You could [
> > hostid
> > = gethostid(); ] which will determine the unique
> > 32 bit host identifier assigned to the local machine, or you could
> > [retcode
> > = gethostbyname (name); ] which will map a host
> > name to an IP address, or you could [retcode = gethostbyaddr (addr,
> > alen,
> > atype); ] which will return a structure full of information
> > about the IP address contained in addr.  I would suggest looking at
> > the API
> > documentation for more details here.
> >
> >         Lastly, a simple way to prime a host look up is to keep the
> > system
> > name in the Network Attributes, and the primary host
> > name the same, so that you can rtvneta sysname(name) and then
> > gethostbyname
> > to get the address which is what you asked
> > for in the first place.
> >
> >         Hope this is clearer then mud.   :-)
> >
> >         Jeff Silberberg..
> >         CompuDesigns, Inc...
> > -----Original Message-----
> > From: Shannon O'Donnell <orion@auburnctnet.com>
> > To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
> > Date: Monday, February 22, 1999 2:38 PM
> > Subject: TCP/IP Address
> >
> > >This might be a dumb question, but I am away from my office and
> can't
> >
> > >look it up, and my internet connection is too slow to spend a long
> > time
> > >searching the online knowledgebase for the answer...so...does
> anyone
> > >know, off the top of their head, if there is a way to get the IP
> > address
> > >of the AS/400 using a command, a cl program or an API and what it's
> > >called?
> > >
> > >I just need to verify that this function exists. I know about the
> > >Retrieve Device Description API that will do this for the
> individual
> > >client. I'm just not sure if there's a way to retrieve the actual
> IP
> > >address as defined for the system.
> > >
> > >Thanks!
> > >
> > >+---
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> 
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