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Re: [SCTP-Discussion] sctplib & MacOS X 10.4


Chronological Thread 
  • From: Michael Tuexen <Michael.Tuexen AT micmac.franken.de>
  • To: Andreas Fink <afink AT global-networks.ch>
  • Cc: "discussion (E-mail)" <discussion AT sctp.de>
  • Subject: Re: [SCTP-Discussion] sctplib & MacOS X 10.4
  • Date: Tue Sep 20 18:42:02 2005
  • List-id: SCTP Discussions <discussion.sctp.de>
Hi Andreas,

thank you very much for your information.

There even does exist a developer version which uses a separate process
doing the raw IP stuff and something more. Unfortunately it runs only
under Linux, was not really tested and is not supported anymore.

I think the way to go is with a kernel implementation... Sooner or
later we will have finished the port to Tiger.

Best regards
Michael

On Sep 20, 2005, at 17:52 Uhr, Andreas Fink wrote:

Hi folks,

I've got into some issues with an application using sctp and contacted Apple developer support about it. It wasnt an issue with SCTP per se. One of the sub-discussions we had was why the application has to run as root. Its because the application needs access to the raw socket. The developer technical support gave me an interesting hint I might want to share with you.

In fact it is running suid root because libsctp requires access to a
raw IP socket.


You could prevent your entire program running as root by using a setuid root helper tool to create the raw IP socket and then pass it back to your application using descriptor passing. There's a library that shows how to do this on our web page.

<http://developer.apple.com/samplecode/MoreAuthSample/ MoreAuthSample.html>


So this is a way around running as root.

BTW, I've nicely packaged sctplib 1.0.4 for MacOS X, now that I hear that there's a new version, I'll redo my packages (which are for both, Intel and PowerPC architecture).


Andreas Fink
Global Networks Schweiz AG

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