robert.butler5 at verizon
Jan 15, 2004, 7:53 AM
Post #4 of 4
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Yes, post it to the list. Thanks for tracking it down. It all worked fine when tested on Win NT / 2k. Did the size of the time_t or sckaddr_in structure change between NT and XP?
Later
Rob
>
> We have managed to resolve the problem, and all is now working correctly.
>
> By packet sniffing the broadcasts from both the linux machines and the XP
> machines we discovered that the data section of the XP packet was 4 bytes
> longer than that of the linux machines.
>
> Hence, we patched the NTBHB code to reduce the size of the data section to
> 100 bytes to match that of the packets from the linux machines.
> t_time needed to be padded to 64 bits.
> The structure of the sckaddr_in structure differed between XP and linux, so
> we adjusted it to reproduce a linux packet.
>
> Rob, The patch is not elegant, but it works for us. If you would like us to
> post the patch then let me know.
>
> Neil
>
> > Theo, have there been any changes to the broadcast data structure
> > in newer version of Backhand? If so the NT Backhand Broadcaster
> > code would need to be updated to include the changes.
> >
> > Other than that make sure your settings in the registry for NT
> > BHB are correct. It looks like the broadcast data structure
> > after the IP address is having a problem. This could be because
> > a required piece of data is missing in the registry or if the
> > backhand data structure changed, and the change was not
> > duplicated to NT BHB.
> >
> > Let's wait for a message from Theo confirming if there were /
> > were not changes to the broadcast data structure, and meanwhile
> > you can double check your settings. If neither of those two
> > yeild any results I can take a look at the NTBHB code -- it's
> > been a while...
> >
> > Later
> > Rob
> > >
> > > We have just set up NT Backhand Broadcaster on 4 XP machines
> > >
> > > We have two SuSE Linux machines running Apache 1.3.28 and
> > mod_backhand 1.2.2
> > > which are correctly working.
> > >
> > > When the status page is accessed (http://localhost/backhand/)
> > the stats that
> > > are returned from the 2 Linux machines are correct, but the
> > stats which are
> > > returned from the XP machines look garbled.
> > > The hostname and age appear correct.
> > > The IP address is correct but the port is listed as 0 not 80
> > > Total Mem is listed as 1MB; Avail Mem is listed as 1073201152 MB.
> > > Arriba is 0; #CPUs is 1000; Load/HWM is 0.000/0 and CPU Idle is 0.000
> > >
> > > Checking the registry settings on the XP machines everything
> > looks good -
> > > the Arriba score is 673266000.
> > >
> > >
> > > Backhanding is working between the two linux boxes but it never
> > goes to the
> > > XP machines. Instead an apache Internal Server Error is
> > received. Checking
> > > the apache error log an entry of "Request exceeding the limit
> > of internal
> > > redirects" is listed.
> > >
> > > Is this anything to do with the NT Backhand stats being garbled
> > - ie. a port
> > > of 0 meaning the server cannot proxy?
> > >
> > > Using HTTPRedirectByName works; HTTPRedirectByIP fails (I
> > assume again due
> > > to the port number)
>
>
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