From owner-FreeBSD-tech-jp@jp.freebsd.org  Fri Jun 13 23:34:41 1997
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To: FreeBSD-tech-jp@jp.freebsd.org, candy@fct.kgc.co.jp
In-Reply-To: Your message of "Fri, 13 Jun 1997 19:24:31 +0900"
References: <199706131024.TAA00462@xxx.fct.kgc.co.jp>
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From: Koji Imada - je4owb/2 <koji@math.human.nagoya-u.ac.jp>
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Date: Fri, 13 Jun 1997 23:33:38 +0900
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Subject: [FreeBSD-tech-jp 273] Re: How to forward broadcasts? (was Re:iij-pppTunelDevice
	 Netmask)
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$B:#ED!wL>8E20Bg3X$G$9!#(B

>>>>> "candy" == candy  <candy@fct.kgc.co.jp> writes:

 candy>   $B$3$N%Q%C%A$rEv$F$?$@$1$G$O$@$a$G$7$?$,!"(BNetBSD 1.2 $B$r;29M$K!"$b$&0l(B
 candy> $B2U=jJQ99$9$k$HF0:n$7$^$7$?!#:G8e$K%Q%C%A$rIU$1$^$9$N$G!"$I$J$?$+(B 
 candy> send-pr $B$7$FD:$1$l$P$H;W$$$^$9!#(B

$B$4$a$s$J$5$$!#(B_o_ $B$[$s$H$O$=$C$A$b(B check $B$7$H$+$J$-$c$$$1$J$+$C$?$s$G(B
$B$9$,!"K:$l$F$^$7$?!#8@$o$l$F$_$l$P$=$NDL$j$G$9!#(B

 candy>   $B<B$O<RFb(B LAN $B$G(B Windows NT $B$r(B IP $B%k!<%?$K;H$C$F$$$k2U=j$,$"$j!"$=$N(B
 candy> $B@h$K(B directed broadcast $B$,FO$+$J$$$H$$$&LdBj$,$"$j$^$7$?!#;d$O$^$5$+(B 
 candy> FreeBSD $B$bF1MM$H$OCN$i$:!"(B
 candy> $B!V(BNT $B$J$s$+$5$C$5$H<N$F$F!"(BBSD $B$KBX$($l$P!A!A(B?$B!W(B
 candy> $B$J$I$H$[$6$$$F$*$j$^$7$?!#(B

NetBSD $B$H$$$&$+(B 4.4BSD $B$ODL$k$N$G$9$+$iLdBj$"$j$^$;$s!#(B:-)

 candy>   FreeBSD 2.2.1R $B$G(B tcpdump -i ed0 $B$7$J$,$i!"F1$8%[%9%H$G(B
 candy>  ping -c1 (ed0 $B$N(B broadcast address) $B$9$k$H!"(B

 candy> H:M:S.U 0:54:10:c7:0:0 2:0:0:0:45:0 ff01 88: 
 candy>                  6a89 c0a8 5f08 c0a8 5fff 0800 d938 5802
 candy>                  0000 f8fb a033 4292 0000 0809 0a0b 0c0d
 candy>                  0e0f 1011 1213 1415 1617 1819 1a1b 1c1d
 candy>                  1e1f 2021 2223 2425 2627 2829 2a2b 2c2d
 candy>                  2e2f 3031 3233 3435 3637
 candy> H:M:S.U (ed0 MAC) ff:ff:ff:ff:ff:ff 0800 98: 192.168.95.8 > 192.168.95.255: icmp: echo request
 candy>                  4500 0054 10c7 0000 ff01 6a89 c0a8 5f08
 candy>                  c0a8 5fff 0800 d938 5802 0000 f8fb a033
 candy>                  4292 0000 0809 0a0b 0c0d 0e0f 1011 1213
 candy>                  1415 1617 1819 1a1b 1c1d 1e1f 2021 2223
 candy>                  2425 2627 2829 2a2b 2c2d 2e2f 3031 3233
 candy>                  3435 3637

 candy> $B$N$h$&$K!"Lu$N$o$+$i$J$$%Q%1%C%H$,I=<($5$l$^$9!#<B:]$K$=$N$h$&$J%Q%1%C(B
 candy> $B%H$,%M%C%H%o!<%/$K=P$F$$$k$+$I$&$+$OITL@$G$9!#$^$?(B FreeBSD 2.1.0R $B$G$O(B
 candy> $B:F8=$7$^$;$s$G$7$?!#(B

$B$3$l$b(B NetBSD $B$N(B sys/net/if_loop.c $B$H(B looutput $B$r8+Hf$Y$l$P$o$+$j$^$9!#(B
ether_output $B$,(B simplex $B$J$I$G(B packet $B$r<+J,$K$bAw$k;~$K(B looutput $B$rMQ(B
$B$$$^$9$,!"$=$N;~0z?t$H$7$FEO$5$l$k(B ifp $B$O(B ethernet $B$N$b$N$G$9!#$D$^$j(B 
looutput $B$+$i(B bpf $B$KEO$5$l$k(B packet $B$N(B type $B$H(B header $B$ND9$5$N7W;;$,68(B
$B$&$N$G$9!#:G=i$NJQ$J(B packet $B$OFs$D$a$N(B packet $B$N@hF,$K(B u_int $B$N(B 
2(AF_INET) $B$r$D$1$F(B ethernet $B$N(B packet $B$H$_$J$;$P$=$N$b$N$:$P$j$G$9!#(B

$BFs$D$a$O(B ethernet $B$N(B device driver $B$,(B bpf $B$KEO$7$F$$$k$b$N$G$9!#$D$^$j(B
simplex $B$J$I$G(B loopback $B$9$kE[$r(B looutput $B$,(B bpf $B$KEO$9I,MW$O$J$$$H$$(B
$B$&$3$H$G$9!#(B
--
   $B:#ED(B $B9(;J(B $B!J$$$^$@(B $B$3$&$8!K(Bje4owb/2 koji@math.human.nagoya-u.ac.jp
    $BL>8E20Bg3XBg3X1!?M4V>pJs3X8&5f2J(B $BJ*<A!"@8L?>pJs3X@l96>pJs4pACO@(B
          http://www.math.human.nagoya-u.ac.jp/~koji/
  PGP Key fingerprint: 9B E6 BA E5 CA CE 06 C2  B6 3D 95 1E 38 47 17 B8
