1 .\" Copyright (c) 2008 by Gerrit Renker <gerrit@erg.abdn.ac.uk>
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" $Id: udplite.7,v 1.12 2008/07/23 15:22:22 gerrit Exp gerrit $
25 .\" Japanese Version Copyright (c) 2008 Akihiro MOTOKI
26 .\" all rights reserved.
27 .\" Translated 2008-08-21, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.07
29 .TH UDPLITE 7 2008-12-03 "Linux" "Linux Programmer's Manual"
31 udplite \- ·ÚÎ̤ʥ桼¥¶¡¼¥Ç¡¼¥¿¥°¥é¥à¥×¥í¥È¥³¥ë
33 .B #include <sys/socket.h>
35 .\" FIXME . see #defines under `BUGS',
36 .\" when glibc supports this, add
37 .\" #include <netinet/udplite.h>
39 .B sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE);
41 ¤³¤ì¤Ï RFC\ 3828 ¤Ë½ñ¤«¤ì¤Æ¤¤¤ë·ÚÎ̤ʥ桼¥¶¡¼¥Ç¡¼¥¿¥°¥é¥à¥×¥í¥È¥³¥ë
42 (Lightweight User Datagram Protocol; UDP-Lite) ¤Î¼ÂÁõ¤Ç¤¢¤ë¡£
44 UDP-Lite ¤Ï UDP (RFC\ 768) ¤Î³ÈÄ¥¤Ç¡¢²ÄÊÑĹ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ë¡£
45 ¤³¤Î¥×¥í¥È¥³¥ë¤¬¸ú²Ì¤òȯ´ø¤¹¤ë¤Î¤Ï¡¢¾¯¤·¤À¤±²õ¤ì¤¿¥Ç¡¼¥¿¥°¥é¥à¤¬¤¢¤Ã¤¿¾ì¹ç¤Ë¡¢
46 ¤½¤Î¥Ç¡¼¥¿¥°¥é¥à¤ò²¼°Ì¥ì¥¤¥ä¡¼¤Î¥×¥í¥È¥³¥ë¤ËÇÑ´þ¤µ¤»¤ë¤Î¤Ç¤Ï¤Ê¤¯¡¢
47 ¤½¤ì¤òÍøÍѤ¹¤ë¤³¤È¤¬¤Ç¤¤ë¤è¤¦¤Ê¡¢¤¢¤ë¼ï¤Î¥Þ¥ë¥Á¥á¥Ç¥£¥¢Å¾Á÷¤Ë¤ª¤¤¤Æ¤Ç¤¢¤ë¡£
49 ²ÄÊÑĹ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤÏ
51 ¥ª¥×¥·¥ç¥ó·Ðͳ¤ÇÀßÄꤵ¤ì¤ë¡£
52 ¤³¤Î¥ª¥×¥·¥ç¥ó¤¬ÀßÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢UDP ¤È°Û¤Ê¤ë¤Î¤Ï
53 °ã¤¦ IP ¥×¥í¥È¥³¥ë¼±ÊÌ»Ò (IANA ÈÖ¹æ 136) ¤ò»ÈÍѤ¹¤ëÅÀ¤À¤±¤Ç¤¢¤ë¡£
57 ¤Î´°Á´¤Ê³ÈÄ¥¡¢¤¹¤Ê¤ï¤Á API ¤È API ¤ÎÆ°ºî¤ÏƱ¤¸¤Ç¤¢¤ë¡£
58 ¤³¤ì¤Ë²Ã¤¨¤Æ¡¢2 ¤Ä¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤¬¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤò
59 À©¸æ¤¹¤ë¤¿¤á¤ËÄ󶡤µ¤ì¤Æ¤¤¤ë¡£
60 .SS ¥¢¥É¥ì¥¹¤Î¥Õ¥©¡¼¥Þ¥Ã¥È
71 .SS ¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó
72 UDP-Lite ¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤òÀßÄê/¼èÆÀ¤¹¤ë¤Ë¤Ï¡¢
73 ¥ª¥×¥·¥ç¥ó¥ì¥Ù¥ë°ú¤¿ô¤Ë
75 ¤ò»ØÄꤷ¤Æ¡¢¼èÆÀ»þ¤Ë¤Ï
79 ¤ò¸Æ¤Ó½Ð¤¹¡£¤µ¤é¤Ë¡¢Á´¤Æ¤Î
81 ¤Î¥½¥±¥Ã¥È¥ª¥×¥·¥ç¥ó¤¬ UDP-Lite ¥½¥±¥Ã¥È¤Ç¤â»ÈÍѤǤ¤ë¡£
86 °Ê²¼¤Î 2 ¤Ä¤¬ UDP-Lite ¤Ë¸ÇͤΥª¥×¥·¥ç¥ó¤Ç¤¢¤ë¡£
88 .BR UDPLITE_SEND_CSCOV
89 ¤³¤Î¥ª¥×¥·¥ç¥ó¤ÏÁ÷¿®Â¦¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤòÀßÄꤹ¤ë¡£
91 ·¿¤ò°ú¤¿ô¤È¤·¤Æ¼è¤ê¡¢ÀßÄê²Äǽ¤ÊÃͤÎÈÏ°Ï¤Ï 0 ¤«¤é 2^16-1 ¤Þ¤Ç¤Ç¤¢¤ë¡£
93 ÃÍ 0 ¤Ï¥Ç¡¼¥¿¥°¥é¥àÁ´ÂΤ¬¾ï¤Ë¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоݤȤʤ뤳¤È¤ò°ÕÌ£¤¹¤ë¡£
94 ÃÍ 1¡Á7 ¤ÏÉÔÀµ¤Ç¤¢¤ê (RFC\ 3828 ¤Î 3.1 ¾Ï)¡¢ÈϰϤÎÀßÄê¤È¤·¤ÆºÇ¾®ÃͤǤ¢¤ë
97 IPv6 ¤Î jumbograms (µðÂç¤Ê¥Ç¡¼¥¿¥°¥é¥à; RFC\ 2675) ¤Î¾ì¹ç¤Ë¤Ï¡¢
98 UDP-Litev6 ¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤϡ¢RFC\ 3828 ¤Î 3.5 ¾Ï¤Ë¤¢¤ë¤è¤¦¤Ë¡¢
99 ÀèƬ¤«¤é 2^16-1 ¥ª¥¯¥Æ¥Ã¥È¤Þ¤Ç¤Ë¸ÂÄꤵ¤ì¤ë¡£
100 ¤½¤Î¤¿¤á¡¢¤½¤ì¤è¤êÂ礤ÊÃÍ¤Ï 2^16-1 ¤ËÌۤäÆÀÚ¤êµÍ¤á¤é¤ì¤ë¡£
101 ¸½ºß¤ÎÂоÝÈϰϤÎÃͤòÃΤꤿ¤±¤ì¤Ð¡¢¤¤¤Ä¤Ç¤â
103 ¤ò»È¤Ã¤ÆÃͤòÌ䤤¹ç¤ï¤»¤ë¤³¤È¤¬¤Ç¤¤ë¡£
105 .BR UDPLITE_RECV_CSCOV
106 ¤³¤ì¤Ï¼õ¿®Â¦¤Î¥Á¥§¥Ã¥¯¥µ¥à¤ÎÂоÝÈϰϤòÀßÄꤹ¤ë¤â¤Î¤Ç¡¢
107 »ÈÍѤµ¤ì¤ë°ú¤¿ô·Á¼°¤ÈÃͤÎÈϰϤÏ
108 .B UDPLITE_SEND_CSCOV
110 ¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢ÉôʬŪ¤Ê¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈϰϤò»ý¤Ä¥È¥é¥Õ¥£¥Ã¥¯¤ò
111 ͸ú¤Ë¤¹¤ë¤Î¤ËɬÍפʤ櫓¤Ç¤Ï¤Ê¤¯¡¢¥È¥é¥Õ¥£¥Ã¥¯¥Õ¥£¥ë¥¿¡¼¤È¤·¤Æµ¡Ç½¤¹¤ë¡£
112 ¤³¤Î¥ª¥×¥·¥ç¥ó¤¬Í¸ú¤Ë¤¹¤ë¤È¡¢¥«¡¼¥Í¥ë¤Ï»ØÄꤵ¤ì¤¿¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈÏ°Ï
113 ¤è¤ê¤â¡Öû¤«¤¤¡×ÂоÝÈϰϤò»ý¤Ä¥Ñ¥±¥Ã¥È¤òÁ´¤ÆÇÑ´þ¤¹¤ë¤è¤¦¤Ë¤Ê¤ë¡£
115 .B UDPLITE_RECV_CSCOV
116 ¤ÎÃͤ¬¼ÂºÝ¤Î¥Ñ¥±¥Ã¥È¤Î¥Á¥§¥Ã¥¯¥µ¥àÂоÝÈϰϤè¤ê¤âÂ礤¤¾ì¹ç¡¢
117 ¼õ¿®¤·¤¿¥Ñ¥±¥Ã¥È¤ÏÌۤäÆÇÑ´þ¤µ¤ì¤ë¡£
118 ¤¿¤À¤·¡¢¥·¥¹¥Æ¥à¥í¥°¤ËÂФ·¤Æ·Ù¹ð¥á¥Ã¥»¡¼¥¸¤¬À¸À®¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
119 .\" SO_NO_CHECK exists and is supported by UDPv4, but is
120 .\" commented out in socket(7), hence also commented out here
122 .\"Since UDP-Lite mandates checksums, checksumming can not be disabled
129 ¤Ë¤Ä¤¤¤Æ½ñ¤«¤ì¤Æ¤¤¤ëÁ´¤Æ¤Î¥¨¥é¡¼¤ÏÊÖ¤ë²ÄǽÀ¤¬¤¢¤ë¡£
130 UDP-Lite ¼«ÂΤϿ·¤¿¤Ê¥¨¥é¡¼¤ÏÄɲ䷤Ƥ¤¤Ê¤¤¡£
132 .\" FIXME . remove this section once glibc supports UDP-Lite
133 glibc ¤Ë¤è¤ë¥µ¥Ý¡¼¥È¤¬¤Ê¤¤¾ì¹ç¤Ï¡¢°Ê²¼¤ÎÄêµÁ¤ò¹Ô¤¦É¬Íפ¬¤¢¤ë¡£
137 #define IPPROTO_UDPLITE 136
138 .\" The following two are defined in the kernel in linux/net/udplite.h
139 #define UDPLITE_SEND_CSCOV 10
140 #define UDPLITE_RECV_CSCOV 11
145 \- UDP-Litev4 ¤Î´ðËÜŪ¤ÊÅý·×¾ðÊ󥫥¦¥ó¥¿¡¼¡£
148 \- UDP-Litev6 ¤Î´ðËÜŪ¤ÊÅý·×¾ðÊ󥫥¦¥ó¥¿¡¼¡£
150 UDP-Litev4/v6 ¤Ï Linux 2.6.20 ¤Ç½é¤á¤ÆÅо줷¤¿¡£
157 RFC\ 3828 for the Lightweight User Datagram Protocol (UDP-Lite)
159 .I Documentation/networking/udplite.txt