Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!psuvax1!husc6!encore!pinocchio!peralta
From: peralta@pinocchio.Encore.COM (Rick Peralta)
Newsgroups: comp.sys.encore
Subject: Re: Fiddling IP headers under UMAX V
Summary: (not yet)
Keywords: UMAX IP HELP!
Message-ID: <11242@encore.Encore.COM>
Date: 26 Feb 90 21:32:38 GMT
References: <2964@minyos.xx.rmit.oz>
Sender: news@Encore.COM
Reply-To: peralta@pinocchio.UUCP (Rick Peralta)
Organization: Encore Computer Corp, Marlboro, MA
Lines: 19

In article rxxgap@minyos.xx.rmit.oz (Greg Price) writes:
>
>  I have the need to set particular fields in the IP header, in particular
>the time to live counter, or the options (to allow a route record). Does 
>anyone know how to do this under UMAX V. Root privs are not a concern. It
>would also be possible to construct the IP header myself and send it out 
>raw, but I need to receive the replies. 

You didn't mention which version of the OS, but in this case the answer is
pretty much the same.  You can't really change the IP header information
without modifying the driver source.

The next release (Umax 2.4) uses streams.  This will allow you the ability
to create streams drivers and modules.  Also, there is a facility to allow
work from user space with link level (Ethernet) data.  This is not exactly
a simple task, but may allow you to accomplish what you really want.


 - Rick