IPP Mail Archive: RE: IPP> Re: New IPP Scheme

IPP Mail Archive: RE: IPP> Re: New IPP Scheme

RE: IPP> Re: New IPP Scheme

Carl Kugler (kugler@us.ibm.com)
16 Jul 1998 21:09:37 -0000

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>
> I wrote the sentences that you are asking about. I tried to pick words that
> would be unambiguous.
>
> The intention is that IPP software must be able to listen on port 631 and
> may be able to listen on other ports.
> If such software allows an administrator to configure the ports, then such
> an adminstrator may be able to have IPP software listen other ports, such as
> port 80 and might make it be the only port that the IPP server listens on.
> The customer has the right to do what he wants, even if we don't think it is
> the wisest choice.
>
> Bob Herriot
>

What I find ambiguous, then, are the words "in addition to" and "as well" in these sentences:

"IPP server implementations may support other ports, in addition to this port."

"It is REQUIRED that a printer implementation support HTTP over the IANA assigned Well Known Port 631 (the IPP default port), though a printer implementation may support HTTP over port some other port as well."

Maybe it should say:

"It is REQUIRED that a printer implementation support HTTP over the IANA assigned Well Known Port 631 (the IPP default port), though a printer implementation may be configured to listen on some other port instead."

-Carl

>
> At 10:24 AM 7/16/98 , Carl Kugler wrote:
> >Carl:
> >>
> >> The implementation MUST support port 631 however, mine is administratively
> >> set to only OPERATE on port 80. The code is compliant.
> >>
> >> Don
> >>
> >>
> >Hmmm... I think we need some clarification in the wording here, because I
> think it's ambiguous as it stands. Here's another quote: "IPP server
> implementations MUST offer IPP services using HTTP over the IANA assigned Well
> Known Port 631 (the IPP default port). IPP server implementations may support
> other ports, in addition to this port."
> >
> >So you read "suport" and "offer IPP services" to mean "can be configured to
> listen on" rather than "is required to listen on"?
> >
> > -Carl
> >
> >>
> >>
> >> "Carl Kugler" <kugler%us.ibm.com@interlock.lexmark.com> on 07/16/98
> >> 12:18:26 PM
> >>
> >> To: ipp%pwg.org@interlock.lexmark.com
> >> cc: (bcc: Don Wright)
> >> bcc: Don Wright
> >> Subject: RE: IPP> Re: New IPP Scheme
> >>
> >>
> >>
> >>
> >> ...
> >> > Sorry Larry, but my printer isn't on the default IPP port of 631. Mine
> >> is
> >> > on 80 so my URL is exactly right. Not all implementations MUST be on
> >> 631.
> >> ...
> >> That's not how I read ftp://ftp.pwg.org/pub/pwg/ipp/new_PRO/ipp-pro-980630
> >>
> >> It says "It is REQUIRED that a printer implementation support HTTP over the
> >> IANA assigned Well Known Port 631...". Therefore, a conforming
> >> implementation MUST be on 631, although it might also be on some other port
> >> simultaneously.
> >>
> >> -----
> >> Original Message: http://www.findmail.com/list/ipp/?start=4106
> >> Start a FREE email list at http://www.FindMail.com/
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >-----
> >Original Message: http://www.findmail.com/list/ipp/?start=4138
> >Start a FREE email list at http://www.FindMail.com/
> >
>
> --=====================_160811464==_.ALT
> Content-Type: text/html; charset="us-ascii"
>
> <html>
> <font size=3>I wrote the sentences that you are asking about.&nbsp; I
> tried to pick words that <br>
> would be unambiguous.<br>
> <br>
> The intention is that IPP software must be able to listen on port 631 and
> <br>
> may be able to listen on other ports.<br>
> If such software allows an administrator to configure the ports, then
> such <br>
> an adminstrator may be able to have IPP software listen other ports, such
> as <br>
> port 80 and might make it be the only port that the IPP server listens
> on.&nbsp; <br>
> The customer has the right to do what he wants, even if we don't think it
> is <br>
> the wisest choice.<br>
> <br>
> Bob Herriot<br>
> <br>
> <br>
> At 10:24 AM 7/16/98 , Carl Kugler wrote:<br>
> &gt;Carl:<br>
> &gt;&gt; <br>
> &gt;&gt; The implementation MUST support port 631 however, mine is
> administratively<br>
> &gt;&gt; set to only OPERATE on port 80.&nbsp; The code is
> compliant.<br>
> &gt;&gt; <br>
> &gt;&gt; Don<br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;Hmmm... I think we need some clarification in the wording here,
> because I think it's ambiguous as it stands.&nbsp; Here's another
> quote:&nbsp; &quot;IPP server implementations MUST offer IPP services
> using HTTP over the IANA assigned Well Known Port 631 (the IPP default
> port). IPP server implementations may support other ports, in addition to
> this port.&quot;<br>
> &gt;<br>
> &gt;So you read &quot;suport&quot; and &quot;offer IPP services&quot; to
> mean &quot;can be configured to listen on&quot; rather than &quot;is
> required to listen on&quot;?<br>
> &gt;<br>
> &gt;&nbsp;&nbsp;&nbsp; -Carl<br>
> &gt;<br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; &quot;Carl Kugler&quot;
> &lt;kugler%us.ibm.com@interlock.lexmark.com&gt; on 07/16/98<br>
> &gt;&gt; 12:18:26 PM<br>
> &gt;&gt; <br>
> &gt;&gt; To:&nbsp;&nbsp; ipp%pwg.org@interlock.lexmark.com<br>
> &gt;&gt; cc:&nbsp;&nbsp;&nbsp; (bcc: Don Wright)<br>
> &gt;&gt; bcc:&nbsp; Don Wright<br>
> &gt;&gt; Subject:&nbsp; RE: IPP&gt; Re: New IPP Scheme<br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; ...<br>
> &gt;&gt; &gt; Sorry Larry, but my printer isn't on the default IPP port
> of 631.&nbsp; Mine<br>
> &gt;&gt; is<br>
> &gt;&gt; &gt; on 80 so my URL is exactly right.&nbsp; Not all
> implementations MUST be on<br>
> &gt;&gt; 631.<br>
> &gt;&gt; ...<br>
> &gt;&gt; That's not how I read
> <a href="ftp://ftp.pwg.org/pub/pwg/ipp/new_PRO/ipp-pro-980630" eudora="autourl"><font size=3>ftp://ftp.pwg.org/pub/pwg/ipp/new_PRO/ipp-pro-980630</a><br>
> <font size=3>&gt;&gt; <br>
> &gt;&gt; It says &quot;It is REQUIRED that a printer implementation
> support HTTP over the<br>
> &gt;&gt; IANA assigned Well Known Port 631...&quot;.&nbsp; Therefore, a
> conforming<br>
> &gt;&gt; implementation MUST be on 631, although it might also be on some
> other port<br>
> &gt;&gt; simultaneously.<br>
> &gt;&gt; <br>
> &gt;&gt; -----<br>
> &gt;&gt; Original Message:
> <a href="http://www.findmail.com/list/ipp/?start=4106" eudora="autourl"><font size=3>http://www.findmail.com/list/ipp/?start=4106</a><br>
> <font size=3>&gt;&gt; Start a FREE email list at
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> <font size=3>&gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;&gt; <br>
> &gt;<br>
> &gt;<br>
> &gt;<br>
> &gt;-----<br>
> &gt;Original Message:
> <a href="http://www.findmail.com/list/ipp/?start=4138" eudora="autourl"><font size=3>http://www.findmail.com/list/ipp/?start=4138</a><br>
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> </html>
>
> --=====================_160811464==_.ALT--
>
>
>

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