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From: Archie Cobbs <archie@dellroad.org>
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Subject: Re: netgraph: how to setsockopt on ksocket node ?
In-Reply-To: <214190000.1011326302@blues.viagenie.qc.ca> "from Florent Parent
 at Jan 17, 2002 10:58:22 pm"
To: Florent Parent <Florent.Parent@viagenie.qc.ca>
Date: Fri, 18 Jan 2002 21:30:00 -0800 (PST)
Cc: freebsd-net@FreeBSD.ORG, julian@elischer.org
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Florent Parent writes:
> >> Anyone has an example on how to setsockopt on a ksocket node in netgraph?
> >>
> >>     struct opts {
> >>         int level;
> >>         int name;
> >>         int value;
> >>     } myopts = { SOL_SOCKET, SO_REUSEADDR, 1
> >>     };
> >>
> >>     ret = NgSendMsg(cs, epath, NGM_KSOCKET_COOKIE, NGM_KSOCKET_SETOPT,
> >>                           (struct ng_ksocket_sockopt *)&myopts,
> >> sizeof(myopts)));
> >>
> >> return error 14 "Bad address".
> >>
> >> Did some tracing in ng_ksocket.c and the struct sockopt sent as argument
> >> to  sosetopt() seems to contains sane values:
> >>
> >> sopt.sopt_val = 0xc182452c  (pointer dereferences to 1)
> >> sopt.sopt_valsize = 4

> netgraph: sendto(.dummy): Bad address

Hmm.. I wonder if the problem is that this has never worked :-)

That is, maybe setsockopt() is expecting the value pointer to point
into user memory, while ng_ksocket is using a pointer that points
into kernel memory?

In which case, I don't know how to go about fixing it.. Julian?

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

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