From mboxrd@z Thu Jan  1 00:00:00 1970
From: segooon@gmail.com (Vasiliy Kulikov)
Date: Tue, 18 Jan 2011 12:30:40 +0300
Subject: Implement custom network protocol for local processes
In-Reply-To: <AANLkTi=O2XXO6dp8RupJ883owMCbsjJdGsoZJogkx7vs@mail.gmail.com>
References: <AANLkTi=O2XXO6dp8RupJ883owMCbsjJdGsoZJogkx7vs@mail.gmail.com>
Message-ID: <20110118093039.GA6000@albatros>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Kfir,

On Mon, Jan 17, 2011 at 23:24 +0200, Kfir Lavi wrote:
> Hi,
> How can one implement custom header network protocol.
> I mean header that wraps regular network packets like ethernet, udp, tcp,
> etc...
> The sending of this custom packets is done between processes running
> locally.
> ie. I get a Ethernet packet, inspect it, then add my custom header and
> forward
> it to another process that listens to a socket, and expect to get data
> wrapped with
> this custom header.

You might want to use datagram-oriented UNIX socket to communicate with
client processes.

Also you have to understand what do you want - getting UDP packets on
specific port doesn't require anything special, just bind()'ing to this
port.  But you can get TCP segments only with SOCK_RAW socket.


Thanks,

-- 
Vasiliy