[C++] Using socket created by another application

Moraxus · 02-02-2009, 03:34 PM

How can I send data through socket, which were created by another application?

I know it's possible because I did such a thing on windows, but I had a library which is unavailable for Linux.

I have basic knowledge about sockets programming.

Thanks in advance for any ideas!

ta0kira · 02-02-2009, 03:51 PM

That all depends on 1) what type of socket, 2) if the process to use the socket is the child of the process creating it. I don't know about Windows, but I don't think you can just arbitrarily use a socket created by another process.
ta0kira

Moraxus · 02-02-2009, 04:14 PM

Thanks for the reply.

Quote:

Originally Posted by ta0kira

what type of socket

I'm not sure, it's created by online game client. I only know that it's tcp socket.

Quote:

Originally Posted by ta0kira

if the process to use the socket is the child of the process creating it.

No, but if it's needed process creating socket can be child of process using it.

paulsm4 · 02-02-2009, 04:49 PM

Hi, Moraxus -

I suspect the call you probably used in Win32 was "DuplicateHandle()".

You can share a socket descriptor between Linux processes by using "Unix domain sockets". Here are a couple of links that might help (you can find others with Google):

http://people.cis.ksu.edu/~singh/CIS...k_ipc_tut.html
http://cpansearch.perl.org/src/SAMPO...-0.03/passfd.c
http://lists.canonical.org/pipermail...ry/000292.html

An excellent reference is "Unix Network Programming", by W. Richard Stevens, ISBN 0131411551.

'Hope that helps .. PSM