From: Eric Wong <normalperson@...>
Date: 2012-07-10T05:24:46+09:00
Subject: Re: sock.setsockopt how?

Eliezer Croitoru <eliezer@ngtech.co.il> wrote:
> i want to use specific tcp\dup socketopts.
> in my case i want to use IP_TRANSPARENT SOCKET.
> this is the page of tproxy documentation:
> http://www.mjmwired.net/kernel/Documentation/networking/tproxy.txt
> 
> the option in the kernel ic constant number 19.

Until Ruby exposes the IP_TRANSPARENT constant, you can just use 19
in your code (or define the constant yourself):

        IP_TRANSPARENT = 19
	socket.setsockopt(Socket::SOL_IP, IP_TRANSPARENT, 1)

> i have seen some examples on with setsockopt like this
> http://pastie.org/314914 or the code in bottom.
> but i am unable to understand how am i suppose to set the constant?
> i have looked at the ruby source code and didnt found anywhere the
> word IP_TRANSPARENT so i suppose it wasnt integrated into the
> source.
> any suggestions?

You should also submit a patch to http://bugs.ruby-lang.org to
get IP_TRANSPARENT added to the list of constants Ruby may exposed.
There's already a lot of platform-dependent constants that are
conditionally defined in ext/socket/mkconstants.rb