filter.txt: Linux Socket Filtering
Written by: Jay Schulist <Jay.Schulist@spacs.k12.wi.us>

Ϥ
============

	Linux Socket Filtering ϡBerkeley Packet Filter 
ΤǤBSD  Linux ͥΥե륿󥰤ˤ
Ϥäꤷ㤤Ĥޤ

Linux Socket Filtering (LSF) ȤС桼ڡΥץ
ǤդΥåȤ˥ե륿դ (attach)ΥåȤ̲᤹
ǡΤĤΥפ̲ᤵǤꤹ뤳Ȥ
Ǥ褦ˤʤޤLSF Υե륿ɤι¤ BSD  Berkeley
Packet Filter (BPF) ˴˽򤷤ƤΤǡBSD  bpf.4 manpage 
Ȥȡե륿ݤˤؤΩޤ

LSF  BPF ٤ƤäñǤLSF ǤϥǥХ䡢ǥХह
Τ˵ۤɬפޤñ˥ե륿Υɤꡢ
 SO_ATTACH_FILTER ioctl ͳǥͥФ褤ΤǤ
ե륿ΥɤͥΥå˹ʤСꤷåȤ
˥ǡΥե륿󥰤Ϥޤޤ

SO_DETACH_FILTER ioctl ͳǥåȤե륿곰 (detach)
ȤǤޤե륿դ줿ޤޤξ֤ǥåȤ close
ȡե륿⼫ưŪ˼Τǡ֤󤳤εǽѤ
ȤϤޤʤǤ礦Ʊ̤ϤʤǤǤ
ե륿ƯƤ륽åȤˡ̤Υե륿ɲä뤳ȤǤޤ
ξ硢ե륿ͥΥå˹ʤСͥ
ȤΥե륿곰ե륿򤽤˼դ
Ԥʤޤå˹ʤʤϡȤΥե륿ϥåȤ
Ĥäޤޤˤʤޤ


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Ioctls-
setsockopt(sockfd, SOL_SOCKET, SO_ATTACH_FILTER, &Filter, sizeof(Filter));
setsockopt(sockfd, SOL_SOCKET, SO_DETACH_FILTER, &value, sizeof(value));

BSD  bpf.4 manpage ȡ󥹥С졼 Steven McCanne 
Van Jacobson ˤäƽ񤫤줿 BSD Packet Filter ʸ򻲾ȤΤȡ

:  ŵ <zap03216@nifty.ne.jp>
:  ͺ <nakano@apm.seikei.ac.jp>
:   <hng@ps.ksky.ne.jp>
