Date: Wed, 30 Jan 2002 19:38:20 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: sa kumar <sakumar0123@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: How do I read if_data Message-ID: <20020130173820.GA72059@hades.hell.gr> In-Reply-To: <20020129235205.85924.qmail@web21309.mail.yahoo.com> References: <20020129235205.85924.qmail@web21309.mail.yahoo.com>
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On 2002-01-29 15:52:05, sa kumar wrote:
> Can someone please tell me how to read if_data of a
> specific layer 2 interface from the kernel.
>
> I have looked on the net and in TCP/IP illustrated,
> but to no avail.
From userland, you don't "read if_data". You call the proper
ioctl()'s to fetch the data for you. If you mean from a kernel
driver, then you probably want to start at src/sys/net/if_var.h and
look at the definition of ifnethead:
TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs ... */
--
Giorgos Keramidas . . . . . . . . . keramida@{ceid.upatras.gr,freebsd.org}
FreeBSD Documentation Project . . . http://www.freebsd.org/docproj/
FreeBSD: The power to serve . . . . http://www.freebsd.org/
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