Date: Tue, 9 Apr 2002 13:29:48 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Sebastien Petit <spe@selectbourse.net> Cc: net@freebsd.org Subject: Re: Netgraph question Message-ID: <Pine.BSF.4.21.0204091320590.57350-100000@InterJet.elischer.org> In-Reply-To: <006401c1e000$9fa977f0$020110ac@SPE>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 9 Apr 2002, Sebastien Petit wrote:
> Ok julian,
>
> So I must write loadd with ng_ether for the moment and wait for ng_etf
> include in FreeBSD 4.x.
> I can modify my code after if ng_etf is available...
> Last question, when I write a packet on the lower hook, must I include a
> CRC32 field at the end of the ethernet packet ?
Actually you don't need etf. As archie pointed out.. you can do your own
filtering
and pass anything you don't want (e.g. PPPOE) back to the
interface.. (the the 'upper' hook (and visa versa))
I just MFC'd the etf type BTW.
The HARDWARE adds and strips the CRC.. you can ignore it.
>
> I create a little test program for connecting lower <-> upper, but doesn't
> seem to work, what is wrong ?
>
> #include <netgraph.h>
> #include <netgraph/ng_ether.h>
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/time.h>
> #include <unistd.h>
> #include <fcntl.h>
>
> #define HOOKNAME "myhook"
> #define HOOKNAME2 "myhook2"
>
> int main(int argc, char **argv)
> {
> int csock, dsock;
> struct ngm_connect ngc;
> struct ngm_connect ngc2;
> int bytesread;
> char buf[4096];
> char hookname[4096];
> fd_set fds;
> u_short *csum;
>
> NgMkSockNode(NULL, &csock, &dsock);
> snprintf(ngc.path, sizeof(ngc.path), "xl0:");
> snprintf(ngc.ourhook, sizeof(ngc.ourhook), HOOKNAME);
> snprintf(ngc.peerhook, sizeof(ngc.peerhook), "upper");
> NgSendMsg(csock, ".", NGM_GENERIC_COOKIE, NGM_CONNECT, &ngc,
> sizeof(ngc));
> snprintf(ngc2.path, sizeof(ngc2.path), "xl0:");
> snprintf(ngc2.ourhook, sizeof(ngc2.ourhook), HOOKNAME2);
> snprintf(ngc2.peerhook, sizeof(ngc2.peerhook), "lower");
> NgSendMsg(csock, ".", NGM_GENERIC_COOKIE, NGM_CONNECT, &ngc2,
> sizeof(ngc2));
> for (;;) {
> bzero(buf, sizeof(buf));
> bytesread = NgRecvData(dsock, buf, sizeof(buf), hookname);
> if (! strcmp(hookname, "myhook")) {
> printf("%s !\n", hookname);
> NgSendData(dsock, HOOKNAME2, buf, bytesread);
> }
> if (! strcmp(hookname, "myhook2")) {
> printf("%s !\n", hookname);
> NgSendData(dsock, HOOKNAME, buf, bytesread);
> }
printf("Neither!");
also: what does `ngctl show xl0:` show?
(while it's supposed to be connected)
> }
> }
>
> Thanks,
> Sebastien.
> --
> spe@selectbourse.net
>
> ----- Original Message -----
> From: "Julian Elischer" <julian@elischer.org>
> To: "Sebastien Petit" <spe@selectbourse.net>
> Cc: <net@freebsd.org>
> Sent: Tuesday, April 09, 2002 9:35 PM
> Subject: Re: Netgraph question
>
>
> > there is a node called etf (ethertype filter)
> > that can allow different nodes to share an ethernet interface
> > The ppp daemon needs to be modified a bit to be able to use it..
> >
> > Brian, what does it take to allow one to specify a different node and
> > hook?
> > I.e.
> >
> > if I hook an ethertype filter onto the interface and set it up
> > to send pppoe to hook A and everything else to hook B is there soem way I
> > can tell PPP to uset node etf0:B rather than fxp0:orphans?
> >
> > The etf type is not MFC'd to 4.x yet..
> > I need to do that! thanks for reminding me..
DONE
> >
> >
> >
> > On Tue, 9 Apr 2002, Sebastien Petit wrote:
> >
> > > Hi,
> > >
> > > Actually I rewrote loadd (a load balancing daemon) for running with
> > > netgraph. In the original version, loadd use Divert sockets with ipfw
> > > for taking incoming/outgoing traffic. What node I must use for doing
> > > the same thing ? I try to use ng_ether but if I do that, People that
> > > run pppoe on the same device as load balancing can't use it.
> > >
> > > Any idea ?
> > >
> > > Sebastien.
> > > --
> > > spe@selectbourse.net
> > >
> >
> >
> >
>
>
> 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0204091320590.57350-100000>