Date: Wed, 27 Jun 2001 19:46:05 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Stuart Eichert <seichert@coopcomp.com> Cc: net@freebsd.org Subject: Re: Am I missing something? Message-ID: <Pine.BSF.4.21.0106271944530.91536-100000@InterJet.elischer.org> In-Reply-To: <20010627111222.A9434@gourdy.coopcomp.com>
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You can hook into an ethernet driver in an extensible manner using NETGRAPH. check the netgraph (4) man page and teh netgraph article in daemonnews from early lst year. also look at the ng_ether netgraph node julian On Wed, 27 Jun 2001, Stuart Eichert wrote: > In the past (under FreeBSD 3.0 and 3.3) I implemented a new networking > protocol, that ran over Ethernet(and nothing else for that matter). I > put a new ETHERTYPE into ethernet.h(0x0801 for the record). In addition > I modified the switch statements in if_ethersubr.c:ether_output and > if_ethersubr.c:ether_input to recognize this type and act accordingly. > In addition I modified sys/socket.h to add an additional address family > and protocol family for my protocol. From there I implemented the protocol > in a separate directory, made some changes in the conf directory and then > I was able to compile a new kernel with support for my protocol. > > This is cool and all (and yes I have updated it to work in 4.3), but I don't > like the idea that anyone who wants to try out this protocol and any associated > programs has to recompile an entire kernel. I would much prefer to create > a kernel module that someone can load, test, and then unload. I don't think > that I can do this however, because of the ethernet routines in if_ethersubr.c. > These routines do not allow for the dynamic addition of new ETHERTYPES. > I guess one could screw around with netgraph or tap(though I really know next > to nothing about them), but that would not allow me to plug the protocol > in below the socket layer. > > Is there no way to make a kernel module that will allow for the > dynamic addition of ethernet protocols or am I just missing something? > > -- > ------------ > Stuart Eichert > Cooperative Computers, Inc. > seichert@coopcomp.com > (650)938-0730 x 15 > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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