Date: Mon, 08 Dec 2008 16:21:44 +0000 From: Ferner Cilloniz <fernercc@gmail.com> To: Julian Elischer <julian@elischer.org> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD kernel module and sending udp packets Message-ID: <1228753304.4948.6.camel@mobiliare.Belkin> In-Reply-To: <493D6F6E.4020900@elischer.org> References: <1228699701.4940.2.camel@mobiliare.Belkin> <493CD5AB.8030303@elischer.org> <1228702422.4940.7.camel@mobiliare.Belkin> <493CD98D.7000909@elischer.org> <1228740437.4956.1.camel@mobiliare> <493D6F6E.4020900@elischer.org>
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Yes I am writing my own loadable kernel module such that I can send a UDP packet when i tell it to by issuing a homemade system call. I have been looking at /usr/src/sys/netgraph/ng_sample.c Am i supposed to implement the functions in that file? I am a little lost. I only want to send a UDP packet and in that file I see functions concerning receiving. Is there any other way? Thanks Julian and everyone else. On Mon, 2008-12-08 at 11:03 -0800, Julian Elischer wrote: > Ferner Cilloniz wrote: > > Hi Julian. I'm very happy for your help. I have read the guide to > > netgraph and find it very interesting :) > > > > I still dont understand when you say "you could give your module a > > netgraph interface." > > > > Can you please explain this a little more please? > > > You indicated that you were going to be writing your own module. > your module should include the interface functions indicated in > ng_sample.c > > That will allow your module to be hooked up to the other netgraph > modules in whatever orrder you want, and that includes the ng_ksocket > module that would allow your module to sned and receive data through > the in-kernel socket. > > > > > > Thanks. > > > > On Mon, 2008-12-08 at 00:23 -0800, Julian Elischer wrote: > >> Ferner Cilloniz wrote: > >>> Thanks for the reply. I read something about that but I didn't > >>> understand what was being said. > >>> > >>> Can you please help me in understanding. I have googled for sample code > >>> and didn't find anything useful. Can you, or anyone else, please help me > >>> understand this? > >> http://people.freebsd.org/~julian/netgraph.html > >> > >>> Thanks again :) > >>> > >>> On Mon, 2008-12-08 at 00:07 -0800, Julian Elischer wrote: > >>>> Ferner Cilloniz wrote: > >>>>> Hello everyone. > >>>>> > >>>>> I need help with documentation concerning how to send a udp or tcp > >>>>> packet from a kernel module. I have found this information for Linux but > >>>>> not for FreeBSD. > >>>>> > >>>>> Please help me. > >>>> you could give your module a netgraph interface. Then it can connect > >>>> directly to the ng_ksocket node type and use that. as an in-kernel socket. > >>>> > >>>> > >>>> > >>>>> Thank you :) > >>>>> > >>>>> _______________________________________________ > >>>>> freebsd-net@freebsd.org mailing list > >>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-net > >>>>> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > -- Cilloniz Bicchi, Ferner Research Assistant Dept. of Computer Sciences The University of Texas at Austin http://www.cs.utexas.edu/~fernercc fernercc@cs.utexas.edu
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