(split) LDP v3.30, v3.31 の定型的な変更内容を反映。

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

.\" Copyright (c) 2008 by Gerrit Renker <gerrit@erg.abdn.ac.uk>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" $Id: udplite.7,v 1.12 2008/07/23 15:22:22 gerrit Exp gerrit $
.\"
.\" Japanese Version Copyright (c) 2008  Akihiro MOTOKI
.\"         all rights reserved.
.\" Translated 2008-08-21, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.07
.\" 
.TH UDPLITE  7 2008-12-03 "Linux" "Linux Programmer's Manual"
.SH ̾Á°
udplite \- ·ÚÎ̤ʥ桼¥¶¡¼¥Ç¡¼¥¿¥°¥é¥à¥×¥í¥È¥³¥ë
.SH ½ñ¼°
.B #include <sys/socket.h>
.br
.\" FIXME . see #defines under `BUGS',
.\"        when glibc supports this, add
.\"        #include <netinet/udplite.h>
.sp
.B sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE);
.SH ÀâÌÀ
¤³¤ì¤Ï RFC\ 3828 ¤Ë½ñ¤«¤ì¤Æ¤¤¤ë·ÚÎ̤ʥ桼¥¶¡¼¥Ç¡¼¥¿¥°¥é¥à¥×¥í¥È¥³¥ë
(Lightweight User Datagram Protocol; UDP-Lite) ¤Î¼ÂÁõ¤Ç¤¢¤ë¡£

UDP-Lite ¤Ï UDP (RFC\ 768) ¤Î³ÈÄ¥¤Ç¡¢²ÄÊÑĹ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ë¡£
¤³¤Î¥×¥í¥È¥³¥ë¤¬¸ú²Ì¤òȯ´ø¤¹¤ë¤Î¤Ï¡¢¾¯¤·¤À¤±²õ¤ì¤¿¥Ç¡¼¥¿¥°¥é¥à¤¬¤¢¤Ã¤¿¾ì¹ç¤Ë¡¢
¤½¤Î¥Ç¡¼¥¿¥°¥é¥à¤ò²¼°Ì¥ì¥¤¥ä¡¼¤Î¥×¥í¥È¥³¥ë¤ËÇÑ´þ¤µ¤»¤ë¤Î¤Ç¤Ï¤Ê¤¯¡¢
¤½¤ì¤òÍøÍѤ¹¤ë¤³¤È¤¬¤Ç¤­¤ë¤è¤¦¤Ê¡¢¤¢¤ë¼ï¤Î¥Þ¥ë¥Á¥á¥Ç¥£¥¢Å¾Á÷¤Ë¤ª¤¤¤Æ¤Ç¤¢¤ë¡£

²ÄÊÑĹ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤÏ
.BR setsockopt (2)
¥ª¥×¥·¥ç¥ó·Ðͳ¤ÇÀßÄꤵ¤ì¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤¬ÀßÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢UDP ¤È°Û¤Ê¤ë¤Î¤Ï
°ã¤¦ IP ¥×¥í¥È¥³¥ë¼±ÊÌ»Ò (IANA ÈÖ¹æ 136) ¤ò»ÈÍѤ¹¤ëÅÀ¤À¤±¤Ç¤¢¤ë¡£

UDP-Lite ¤Î¼ÂÁõ¤Ï
.BR udp (7)
¤Î´°Á´¤Ê³ÈÄ¥¡¢¤¹¤Ê¤ï¤Á API ¤È API ¤ÎÆ°ºî¤ÏƱ¤¸¤Ç¤¢¤ë¡£
¤³¤ì¤Ë²Ã¤¨¤Æ¡¢2 ¤Ä¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤¬¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤò
À©¸æ¤¹¤ë¤¿¤á¤ËÄ󶡤µ¤ì¤Æ¤¤¤ë¡£
.SS ¥¢¥É¥ì¥¹¤Î¥Õ¥©¡¼¥Þ¥Ã¥È
UDP-Litev4 ¤Ï
.BR ip (7)
¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë
.I sockaddr_in
¥¢¥É¥ì¥¹¤ò»ÈÍѤ¹¤ë¡£
UDP-Litev6 ¤Ï
.BR ipv6 (7)
¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë
.I sockaddr_in6
¥¢¥É¥ì¥¹¤ò»ÈÍѤ¹¤ë¡£
.SS ¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó
UDP-Lite ¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤òÀßÄê/¼èÆÀ¤¹¤ë¤Ë¤Ï¡¢
¥ª¥×¥·¥ç¥ó¥ì¥Ù¥ë°ú¤­¿ô¤Ë
.B IPPROTO_UDPLITE
¤ò»ØÄꤷ¤Æ¡¢¼èÆÀ»þ¤Ë¤Ï
.BR getsockopt (2)
¤ò¡¢ÀßÄê»þ¤Ë¤Ï
.BR setsockopt (2)
¤ò¸Æ¤Ó½Ð¤¹¡£¤µ¤é¤Ë¡¢Á´¤Æ¤Î
.B IPPROTO_UDP
¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤¬ UDP-Lite ¥½¥±¥Ã¥È¤Ç¤â»ÈÍѤǤ­¤ë¡£
¾ÜºÙ¤Ï
.BR udp (7)
¤ò»²¾È¤Î¤³¤È¡£

°Ê²¼¤Î 2 ¤Ä¤¬ UDP-Lite ¤Ë¸ÇÍ­¤Î¥ª¥×¥·¥ç¥ó¤Ç¤¢¤ë¡£
.TP
.BR UDPLITE_SEND_CSCOV
¤³¤Î¥ª¥×¥·¥ç¥ó¤ÏÁ÷¿®Â¦¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤòÀßÄꤹ¤ë¡£
.I int
·¿¤ò°ú¤­¿ô¤È¤·¤Æ¼è¤ê¡¢ÀßÄê²Äǽ¤ÊÃͤÎÈÏ°Ï¤Ï 0 ¤«¤é 2^16-1 ¤Þ¤Ç¤Ç¤¢¤ë¡£

ÃÍ 0 ¤Ï¥Ç¡¼¥¿¥°¥é¥àÁ´ÂΤ¬¾ï¤Ë¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоݤȤʤ뤳¤È¤ò°ÕÌ£¤¹¤ë¡£
ÃÍ 1¡Á7 ¤ÏÉÔÀµ¤Ç¤¢¤ê (RFC\ 3828 ¤Î 3.1 ¾Ï)¡¢ÈϰϤÎÀßÄê¤È¤·¤ÆºÇ¾®ÃͤǤ¢¤ë
8 ¤ËÀÚ¤ê¾å¤²¤é¤ì¤ë¡£

IPv6 ¤Î jumbograms (µðÂç¤Ê¥Ç¡¼¥¿¥°¥é¥à; RFC\ 2675) ¤Î¾ì¹ç¤Ë¤Ï¡¢
UDP-Litev6 ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤϡ¢RFC\ 3828 ¤Î 3.5 ¾Ï¤Ë¤¢¤ë¤è¤¦¤Ë¡¢
ÀèƬ¤«¤é 2^16-1 ¥ª¥¯¥Æ¥Ã¥È¤Þ¤Ç¤Ë¸ÂÄꤵ¤ì¤ë¡£
¤½¤Î¤¿¤á¡¢¤½¤ì¤è¤êÂ礭¤ÊÃÍ¤Ï 2^16-1 ¤ËÌۤäÆÀÚ¤êµÍ¤á¤é¤ì¤ë¡£
¸½ºß¤ÎÂоÝÈϰϤÎÃͤòÃΤꤿ¤±¤ì¤Ð¡¢¤¤¤Ä¤Ç¤â
.BR getsockopt (2)
¤ò»È¤Ã¤ÆÃͤòÌ䤤¹ç¤ï¤»¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.TP
.BR UDPLITE_RECV_CSCOV
¤³¤ì¤Ï¼õ¿®Â¦¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤòÀßÄꤹ¤ë¤â¤Î¤Ç¡¢
»ÈÍѤµ¤ì¤ë°ú¤­¿ô·Á¼°¤ÈÃͤÎÈϰϤÏ
.B UDPLITE_SEND_CSCOV
¤ÈƱ¤¸¤Ç¤¢¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢ÉôʬŪ¤Ê¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈϰϤò»ý¤Ä¥È¥é¥Õ¥£¥Ã¥¯¤ò
Í­¸ú¤Ë¤¹¤ë¤Î¤ËɬÍפʤ櫓¤Ç¤Ï¤Ê¤¯¡¢¥È¥é¥Õ¥£¥Ã¥¯¥Õ¥£¥ë¥¿¡¼¤È¤·¤Æµ¡Ç½¤¹¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤¬Í­¸ú¤Ë¤¹¤ë¤È¡¢¥«¡¼¥Í¥ë¤Ï»ØÄꤵ¤ì¤¿¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈÏ°Ï
¤è¤ê¤â¡Öû¤«¤¤¡×ÂоÝÈϰϤò»ý¤Ä¥Ñ¥±¥Ã¥È¤òÁ´¤ÆÇÑ´þ¤¹¤ë¤è¤¦¤Ë¤Ê¤ë¡£

.B UDPLITE_RECV_CSCOV
¤ÎÃͤ¬¼ÂºÝ¤Î¥Ñ¥±¥Ã¥È¤Î¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈϰϤè¤ê¤âÂ礭¤¤¾ì¹ç¡¢
¼õ¿®¤·¤¿¥Ñ¥±¥Ã¥È¤ÏÌۤäÆÇÑ´þ¤µ¤ì¤ë¡£
¤¿¤À¤·¡¢¥·¥¹¥Æ¥à¥í¥°¤ËÂФ·¤Æ·Ù¹ð¥á¥Ã¥»¡¼¥¸¤¬À¸À®¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
.\" SO_NO_CHECK exists and is supported by UDPv4, but is
.\" commented out in socket(7), hence also commented out here
.\".PP
.\"Since UDP-Lite mandates checksums, checksumming can not be disabled
.\"via the
.\".B SO_NO_CHECK
.\"option from
.\".BR socket (7).
.SH ¥¨¥é¡¼
.BR udp (7)
¤Ë¤Ä¤¤¤Æ½ñ¤«¤ì¤Æ¤¤¤ëÁ´¤Æ¤Î¥¨¥é¡¼¤ÏÊÖ¤ë²ÄǽÀ­¤¬¤¢¤ë¡£
UDP-Lite ¼«ÂΤϿ·¤¿¤Ê¥¨¥é¡¼¤ÏÄɲ䷤Ƥ¤¤Ê¤¤¡£
.SH ¥Ð¥°
.\" FIXME . remove this section once glibc supports UDP-Lite
glibc ¤Ë¤è¤ë¥µ¥Ý¡¼¥È¤¬¤Ê¤¤¾ì¹ç¤Ï¡¢°Ê²¼¤ÎÄêµÁ¤ò¹Ô¤¦É¬Íפ¬¤¢¤ë¡£
.in +4n
.nf

#define IPPROTO_UDPLITE     136
.\" The following two are defined in the kernel in linux/net/udplite.h
#define UDPLITE_SEND_CSCOV  10
#define UDPLITE_RECV_CSCOV  11
.fi
.in
.SH ¥Õ¥¡¥¤¥ë
.I /proc/net/snmp
\- UDP-Litev4 ¤Î´ðËÜŪ¤ÊÅý·×¾ðÊ󥫥¦¥ó¥¿¡¼¡£
.br
.I /proc/net/snmp6
\- UDP-Litev6 ¤Î´ðËÜŪ¤ÊÅý·×¾ðÊ󥫥¦¥ó¥¿¡¼¡£
.SH ¥Ð¡¼¥¸¥ç¥ó
UDP-Litev4/v6 ¤Ï Linux 2.6.20 ¤Ç½é¤á¤ÆÅо줷¤¿¡£
.SH ´ØÏ¢¹àÌÜ
.BR ip (7),
.BR ipv6 (7),
.BR socket (7),
.BR udp (7)

RFC\ 3828 for the Lightweight User Datagram Protocol (UDP-Lite)
.br
.I Documentation/networking/udplite.txt