[linuxjm/LDP_man-pages.git] / release / man7 / icmp.7

.\" This man page is Copyright (C) 1999 Andi Kleen <ak@muc.de>.
.\" Permission is granted to distribute possibly modified copies
.\" of this page provided the header is included verbatim,
.\" and in case of nontrivial modification author and date
.\" of the modification is added to the header.
.\" $Id: icmp.7,v 1.8 2001/01/14 05:30:41 hanataka Exp $
.\"
.\" Japanese Version Copyright (c) 1999 NAKANO Takeo all rights reserved.
.\" Translated 1999-12-06, NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" Updated 2008-12-26, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.14
.\"
.\"WORD         destination route       ¹Ô¤­Àè·ÐÏ©
.\"WORD         token packet filter     ¥È¡¼¥¯¥ó¡¦¥Ñ¥±¥Ã¥È¡¦¥Õ¥£¥ë¥¿
.\"
.TH ICMP 7 2010-02-25 "Linux" "Linux Programmer's Manual"
.SH ̾Á°
icmp, IPPROTO_ICMP \- Linux IPv4 ICMP ¥«¡¼¥Í¥ë¥â¥¸¥å¡¼¥ë
.SH ÀâÌÀ
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Control Message Protocol ¤ò¼ÂÁõ¤·¤¿¤â¤Î¤Ç¤¢¤ë¡£
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¥«¡¼¥Í¥ë¤Î ICMP ¥â¥¸¥å¡¼¥ë¤Ï ICMP ¥ê¥¯¥¨¥¹¥È¤ËÂФ¹¤ë±þÅú¤â¹Ô¤¦¡£
.PP
raw ¥½¥±¥Ã¥È¤ò¥×¥í¥È¥³¥ë
.B IPPROTO_ICMP
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ICMP ¥Ñ¥±¥Ã¥È¤ò¼õ¿®¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
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.BR raw (7)
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¥½¥±¥Ã¥È¤ËÅϤµ¤ì¤ë ICMP ¥Ñ¥±¥Ã¥È¤Î¥¿¥¤¥×¤Ï
.B ICMP_FILTER
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ICMP ¥Ñ¥±¥Ã¥È¤Ï (¤¿¤È¤¨¥æ¡¼¥¶¡¼¥½¥±¥Ã¥È¤ËÅϤµ¤ì¤ë¾ì¹ç¤Ç¤â)¡¢
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.LP
Linux ¤Ç¤Ï ICMP ¥¨¥é¡¼¥Ñ¥±¥Ã¥È¤Î¥ì¡¼¥È¤ò¤½¤ì¤¾¤ì¤ÎÁ÷¤êÀè¤ËÂФ·¤Æ
À©¸Â¤·¤Æ¤¤¤ë¡£
.B ICMP_REDIRECT
¤È
.B ICMP_DEST_UNREACH
¤âÅþÃ夷¤¿¥Ñ¥±¥Ã¥È¤Î¹Ô¤­Àè·ÐÏ© (destination route) ¤òÀ©¸Â¤¹¤ë¡£
.SS /proc ¥¤¥ó¥¿¥Õ¥§¡¼¥¹
ICMP ¤Ç¤Ï¡¢¤¤¤¯¤Ä¤«¤Î¥°¥í¡¼¥Ð¥ë¥Ñ¥é¥á¡¼¥¿¤òÀßÄꤹ¤ë¤¿¤á¤Î
.I /proc
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.I /proc/sys/net/ipv4/
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(rate limitation) ¤Ç¤¢¤ë¡£
Linux 2.2 ¤Ï ICMP ¤ÎÀ©¸Â¤Ë¥È¡¼¥¯¥ó¡¦¥Ð¥±¥Ã¥È¡¦¥Õ¥£¥ë¥¿
(token bucket filter) ¤òÍѤ¤¤ë¡£
.\" FIXME better description needed
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1ms ¤Ç¤¢¤ë¡£
.TP
.IR icmp_destunreach_rate " (Linux 2.2 ¤«¤é 2.4.9 ¤Þ¤Ç)"
.\" Precisely: from 2.1.102
ICMP ÉÔã¥Ñ¥±¥Ã¥È (Destination Unreachable packet) ¤òÁ÷¤ëºÇÂç¥ì¡¼¥È¡£
¤³¤ì¤ÏÆÃÄê¤Î¥ë¡¼¥È¤Þ¤¿¤Ï¹Ô¤­Àè¤Ë¥Ñ¥±¥Ã¥È¤òÁ÷¿®¤¹¤ë¥ì¡¼¥È¤òÀ©¸Â¤¹¤ë¡£
¤³¤ÎÀ©¸Â¤Ï¡¢
path MTU discovery ¤ËɬÍפÊ
.B ICMP_FRAG_NEEDED
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.TP
.IR icmp_echo_ignore_all " (Linux 2.2 °Ê¹ß)"
.\" Precisely: 2.1.68
¤³¤ÎÃͤ¬Èó¥¼¥í¤Î¾ì¹ç¤Ï¡¢ Linux ¤Ï¤¹¤Ù¤Æ¤Î
.B ICMP_ECHO
Í×µá¤ò̵»ë¤¹¤ë¡£
.TP
.IR icmp_echo_ignore_broadcasts " (Linux 2.2 °Ê¹ß)"
.\" Precisely: from 2.1.68
¤³¤ÎÃͤ¬Èó¥¼¥í¤Î¾ì¹ç¤Ï¡¢ Linux ¤Ï¥Ö¥í¡¼¥É¥­¥ã¥¹¥È¥¢¥É¥ì¥¹¤ËÁ÷¤é¤ì¤¿¤¹¤Ù¤Æ¤Î
.B ICMP_ECHO
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.TP
.IR icmp_echoreply_rate " (Linux 2.2 ¤«¤é 2.4.9 ¤Þ¤Ç)"
.\" Precisely: from 2.1.102
.B ICMP_ECHOREQUEST
¥Ñ¥±¥Ã¥È¤Ë±þÅú¤¹¤ë
.B ICMP_ECHOREPLY
¥Ñ¥±¥Ã¥È¤ÎºÇÂçÁ÷¿®¥ì¡¼¥È¡£
.TP
.IR icmp_errors_use_inbound_ifaddr " (Boolean; default: disabled; Linux 2.6.12 °Ê¹ß)"
.\" The following taken from 2.6.28-rc4 Documentation/networking/ip-sysctl.txt
¤³¤ì¤ò̵¸ú¤Ë¤¹¤ë¤È¡¢ICMP ¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤Ï¡¢
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¤³¤ì¤òÍ­¸ú¤Ë¤¹¤ë¤È¡¢¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤Ï ICMP ¥¨¥é¡¼¤Î¸¶°ø¤È¤Ê¤Ã¤¿¥Ñ¥±¥Ã¥È¤ò
¼õ¿®¤·¤¿¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Î¥×¥é¥¤¥Þ¥¢¥É¥ì¥¹¤ÇÁ÷¿®¤µ¤ì¤ë¡£
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Ãí°Õ¤¹¤ë¤³¤È¡£
.TP
.IR icmp_ignore_bogus_error_responses " (Boolean; default: disabled; Linux 2.2 °Ê¹ß)"
.\" precisely: since 2.1.32
.\" The following taken from 2.6.28-rc4 Documentation/networking/ip-sysctl.txt
¥ë¡¼¥¿¤ÎÃæ¤Ë¤Ï¡¢RFC1122 ¤Ë°ãÈ¿¤·¡¢¥Ö¥í¡¼¥É¥­¥ã¥¹¥È¥Õ¥ì¡¼¥à¤ËÂФ·¤Æ
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.TP
.IR icmp_paramprob_rate " (Linux 2.2 ¤«¤é 2.4.9 ¤Þ¤Ç)"
.\" Precisely: from 2.1.102
.B ICMP_PARAMETERPROB
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.TP
.IR icmp_ratelimit " (integer; default: 1000; Linux 2.4.10 °Ê¹ß)"
.\" The following taken from 2.6.28-rc4 Documentation/networking/ip-sysctl.txt
¼ïÊ̤¬
.I icmp_ratemask
(²¼µ­»²¾È) ¤Ë¥Þ¥Ã¥Á¤·¤¿ ICMP ¥Ñ¥±¥Ã¥È¤Î¡¢
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.TP
.IR icmp_ratemask " (integer; default: ²¼µ­»²¾È; Linux 2.4.10 °Ê¹ß)"
.\" The following taken from 2.6.28-rc4 Documentation/networking/ip-sysctl.txt
¥ì¡¼¥ÈÀ©¸Â¤ò¹Ô¤¦ ICMP ¥¿¥¤¥×¤ò·è¤á¤ë¥Þ¥¹¥¯¡£

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.I include/linux/icmp.h
¤ò»²¾È):

.in +4n
.nf
0 Echo Reply
3 Destination Unreachable *
4 Source Quench *
5 Redirect
8 Echo Request
B Time Exceeded *
C Parameter Problem *
D Timestamp Request
E Timestamp Reply
F Info Request
G Info Reply
H Address Mask Request
I Address Mask Reply
.fi
.in

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.TP
.IR icmp_timeexceed_rate " (Linux 2.2 ¤«¤é 2.4.9 ¤Þ¤Ç)"
.B ICMP_TIME_EXCEEDED
¥Ñ¥±¥Ã¥È¤ÎºÇÂçÁ÷¿®¥ì¡¼¥È¡£
¤³¤ì¤é¤Î¥Ñ¥±¥Ã¥È¤Ï¥Ñ¥±¥Ã¥È¤¬¤¢¤Þ¤ê¤Ë¿¤¯¤Î hop ¤òÄ̲ᤷ¤¿¾ì¹ç¤Ë¡¢
¥ë¡¼¥×¤òËɤ°¤¿¤á¤ËÁ÷¤é¤ì¤ë¡£
.SH ¥Ð¡¼¥¸¥ç¥ó
.B ICMP_ADDRESS
Í×µá¤ËÂФ¹¤ë¥µ¥Ý¡¼¥È¤Ï 2.2 ¤Çºï½ü¤µ¤ì¤¿¡£
.PP
.B ICMP_SOURCE_QUENCH
¤Ï Linux 2.2 ¤Çºï½ü¤µ¤ì¤¿¡£
.SH Ãí°Õ
¾¤Î¿¤¯¤Î¼ÂÁõ¤Ç¤Ï¡¢
.B IPPROTO_ICMP
raw ¥½¥±¥Ã¥È¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤¡£
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.\" not really true ATM
.\" .PP
.\" Linux ICMP should be compliant to RFC 1122.
.PP
Linux ¤¬¥ë¡¼¥¿¡¼¤È¤·¤ÆÆ°ºî¤·¤Æ¤¤¤Ê¤¤¤È¤­¤Ë¤Ï¡¢
.B ICMP_REDIRECT
¥Ñ¥±¥Ã¥È¤ÏÁ÷¿®¤µ¤ì¤Ê¤¤¡£
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¸Å¤¤¥²¡¼¥È¥¦¥§¥¤¤Ç¡¢¥ê¥À¥¤¥ì¥¯¥È¡¦¥ë¡¼¥È (redirect route) ¤¬
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.PP
.B ICMP_TIMESTAMP
¤«¤éÊÖ¤µ¤ì¤ë 64 ¥Ó¥Ã¥È¤Î¥¿¥¤¥à¥¹¥¿¥ó¥×¤Ï¡¢
µª¸µ (Epoch) ¤Ç¤¢¤ë 1970-01-01 00:00:00 +0000 (UTC)
¤«¤é¤Î·Ð²á»þ´Ö¤ò¥ß¥êÉÃñ°Ì¤Çɽ¤·¤¿¤â¤Î¤Ç¤¢¤ë¡£
.PP
Linux ICMP ¤Ï ICMP ¤òÁ÷¤ë¤¿¤á¤ËÆâÉô¤Ç raw ¥½¥±¥Ã¥È¤òÍѤ¤¤ë¡£
raw ¥½¥±¥Ã¥È¤Ï
.BR netstat (8)
¤Î½ÐÎÏ¤Ë 0 inode ¤È¤·¤Æ½ÐÎϤµ¤ì¤ë¡£
.SH ´ØÏ¢¹àÌÜ
.BR ip (7)
.PP
.BR RFC\ 792 :
ICMP ¥×¥í¥È¥³¥ë¤ÎÀâÌÀ