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To: FreeBSD-users-jp@jp.freebsd.org
In-Reply-To: Your message of "Tue, 21 Jul 1998 11:02:54 +0900"
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Date: Tue, 21 Jul 1998 13:21:36 +0900
From: Masanori Kanaoka <kana@saijo.mke.mei.co.jp>
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Subject: [FreeBSD-users-jp 30949] Re: DHCP
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$B6b2,!w>>2<<wEE;R9)6H$G$9!#(B

$ kana> $B6b2,!w>>2<<wEE;R9)6H$G$9!#(B
$ kana> 
$ kana> $ $B$/$^$V$A$G$9!#(B
$ kana> $ 
$ kana> 
$ kana> $ kernel $B$K(B bpf $B$,K\Ev$KAH$_9~$^$l$F$k$+3NG'$9$k<j$C<h$jAa$$J}K!$C$F2?$J(B
$ kana> $ $B$s$G$7$g$&$M!D(B

$B<j85$K!"(BFreeBSD 2.2.6-RELEASE $B$G!"(Bbpf $B$NAH$_9~$^$l$F$$$J$$(B kernel $B$r(B
$B;}$C$?(B host $B$G!"(Btcpdump $B$r<B9T$9$k$H0J2<$N$h$&$K$J$j$^$9!#(B

	# tcpdump
	tcpdump: /dev/bpf0: Device not configured

/dev/bpf0 $B$OB8:_$7$F$$$^$9!#(B

	# ls -l /dev/bpf0
	crw-------  1 root  wheel   23,   0 Jul 21 11:23 /dev/bpf0

$B$H$$$&$3$H$G!"(Bbpf $B$,(B kernel $B$KAH$_9~$^$l$F$$$k$+$I$&$+$NH=CG$K;H$($J$$(B
$B$+$J$H;W$C$?$o$1$G$9!#(B

$ bpf_bufsize
$ bpf:inpromisc failed
$ bpf_detached:descriptor not in list
$ bpf_memory
$ bpf attach
$ bpf %s%d attached
$ 
$ $B$H=P$^$7$?!#$I$&$$$&$3$H$G$9!)(B

$B=q$+$l$F$$$^$;$s$,!"(B# tcpdump $B$r<B9T$7$?$H$-$N7k2L$H$$$&$3$H$G$9$h$M!#(B

/sys/net/bpf.c $B$K$"$k%a%C%;!<%8$N$h$&$G$9$M!#(B

$B$3$l$+$i!"J,$+$k$3$H$O(B
	1. kernel $B$K(B bpf $B$OAH$_9~$^$l$F$$$k!#(B
	2. $BM-8z$J(B network interface $B$,B8:_$7$J$$!#(B

2.$B$K$D$$$F$O!"(B/sys/net/bpf.c $B$G(B $B%a%C%;!<%8$r=P$7$F$$$kA08e$r8+$F!"(B
$B$=$&;W$C$?$@$1$J$N$G!"4V0c$C$F$$$k$+$bCN$l$^$;$s!#(B

$BB>$N$+$?$b!"=q$+$l$F$$$^$9$,!#(B

	# dmesg
	# ifconfig -a

$B$J$I$r<B9T$7$F!"(Bnetwork interface $B$r3NG'$5$l$F$O!"$$$+$,$G$7$g$&$+!)(B

------ $B>>2<<wEE;R9)6H3t<02q<R(B  $B@>>r;v6HIt!!1GA|5;=QIt(B ----------
$B!!6b2,!!@57{!!!!!!(BTEL:0897-56-1111($BFb(B518)  FAX:0897-56-8142
---------------- Masanori Kanaoka <kana@saijo.mke.mei.co.jp>----

