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List:       lprng
Subject:    [LPRng] force_fqdn_hostname does not work!
From:       Tore Halset <halset () pvv ! ntnu ! no>
Date:       1998-10-30 8:40:04
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On Thu, 22 Oct 1998, Joerg Bechlars wrote:

>  This entry in lpd.conf may help:
>  # Purpose: force FQDN HOST value in control file 
>  # force_fqdn_hostname@ 
>  switch on:
>  force_fqdn_hostname
>  you dont get the IP-Number, but the corresponding "full qualified domain
>  name"

No, you get the fake-name pluss the domainpart of the real fqdn. My
computer is kallisti.pvv.ntnu.no, but I can make it send jobs as hostname
fakekallisti. With force_fqdn_hostname turned on the fqdn will be
fakekallisti.pvv.ntnu.no. This is controled in src/LPD/lpd_rcvjob.c:

                /* Kludge!  Kludge!
                 * The following code will assign the FQDN Domain
                 * to be that of the Remote Host which is originating
                 * the job.  This allows the server and the remote host tobe
                 * in different domains.
                 */
                s = strchr( FQDNRemote,'.');
                plp_snprintf( qn, sizeof(qn), "H%s%s", cfp->FROMHOST+1, s);

I tried to switch this to 
                plp_snprintf( qn, sizeof(qn), "H%s", FQDNRemote);

And it almost worked. It did not work on printjobs from computers wher the
hostname wher faked.

My problem was that my filters and printer-router program did not get the
fqdn of the client. A better solution to my problem than messing whith
lpd_rcvjob.c was to mess whith setup_filter.c :) I simly added a two lines
to setup_envp() in setup_filter.c:

 plp_snprintf( line, sizeof(line), "FQDN=%s", FQDNRemote);
 add_env( filter, line );

And now all my filters and printer-router software can read the FQDN
encviron. nice? :)

But, I think that force_fqdn_hostname does not work the way it should
work. You can all try it if you have a mac whith MacOS around. Open the
FileSharing control-panel and set the computername to someting funny and
send a printjob to your LPRng server whith force_fqdn_hostname turned on.
You must use the desktop-printing.

 - Tore.

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