RE: Listening on system restricted ports
RE: Listening on system restricted ports
- Subject: RE: Listening on system restricted ports
- From: OL&L Lists <email@hidden>
- Date: Fri, 25 Mar 2005 18:30:54 -0800
At 6:23 PM -0800 3/25/05, Jamie Wood wrote:
My suggestion would be to have your helper tool open the socket,
bind to the restricted port, and then pass the file descriptor back
to your main program via a Unix domain socket. Check out
MoreAuthSample for details:
http://developer.apple.com/samplecode/MoreAuthSample/MoreAuthSample.html
Hope this helps,
Jamie
That sounds good. Thanks for the reference. Now for the big question:
can it be done from Java code? The problem is I have already-existing
Java code on other plats that open and bind to restricted ports
without any C code whatsoever. Now I want to make that same Java code
work on OS X (if possible without any C code). I can write a JNI-C
layer as an interface but my main goal is to get the existing Java
code to work on OS X as-is but the restricted port issue is blocking
me from getting it to work.
Thanks,
Michael
Orbital Launch & Lift, Inc.
http://www.orbitallaunch.com
=================
From: OL&L Lists <email@hidden>
To: email@hidden
Subject: Listening on system restricted ports
Date: Fri, 25 Mar 2005 18:00:32 -0800
I need to bind to restricted ports (below 1024). I can't use a
helper tool because helper tools are supposed to be one shot
programs. What is the correct way to do this on OS X? Can I use a
helper tool to elevate a listening process's privileges, bind to a
restricted port, then lower the listener's privileges? Also, I
would like to be able to do so from both Java and C.
Thanks,
Michael
Orbital Launch & Lift, Inc.
http://www.orbitallaunch.com
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