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Date: Fri, 5 Oct 2007 16:04:07 +0400
From: Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To: Vinod VM <vinuvm@gmail.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: cant compile - undefined reference to `bpfattach'
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Good day.

Fri, Oct 05, 2007 at 04:54:27PM +0530, Vinod VM wrote:
> I'm having trouble in compiling my code with gcc on release 6.2
> 
> I've included the following headers,
> 
> stdlib.h
> sys/types.h
> sys/socket.h
> net/if.h
> net/if_var.h
> net/if_types.h
> net/bpf.h
> 
> When compiling the code, i'm getting the following error message
> 
> /var/tmp//ccphxfRO.o(.text+0x3c): In function `main':
> : undefined reference to `bpfattach'

If I am correct, bpfattach is the kernel-level function.  And you're
trying to write some user-space utility, aren't you?

If you're trying to capture packets, you'll probably want to
consult the pcap(3) manual page.
-- 
Eygene