.\" 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: udp.7,v 1.3 2001/03/10 18:52:43 argrath Exp $
.\"
.\" Japanese Version Copyright (c) 1999 NAKANO Takeo all rights reserved.
.\" Translated Mon 6 Dec 1999 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\"
.TH UDP  7 1998-10-02 "Linux Man Page" "Linux Programmer's Manual" 
.SH ̾
udp \- IPv4  桼ǡץȥ
.SH 
.B #include <sys/socket.h>
.br
.B #include <netinet/in.h>
.br
.B udp_socket = socket(PF_INET, SOCK_DGRAM, 0); 
.SH 
 RFC768 ǵҤƤ User Datagram Protocol μǤ롣
UDP ϥͥ쥹Ρ㤤ǡѥåȥӥǤ롣
ѥåȤ¤ؤ줿ʣ줿ꤹ롣
UDP ž顼򸡽Ф뤿˥åå롣

UDP åȤȤ
륢ɥ쥹⡼ȥɥ쥹ϻꤵʤ
Ԥ襢ɥ쥹Ȥ
.BR sendto (2)

.BR sendmsg (2)
Ƥ٤СǡϤ롣
åȤФ
.BR connect (2)
Ƥ֤ȡǥեȤιԤ襢ɥ쥹ꤵ졢
.BR send (2)
 
.BR write (2)
ȤäơԤ襢ɥ쥹λʤ˥ǡǤ褦ˤʤ롣
ξǤ⡢Ԥ襢ɥ쥹
.BR sendto (2)

.BR sendmsg (2)
ϤСǥեȰʳΥɥ쥹ǽǤ롣
ѥåȤ뤿ˡޤåȤ
.BR bind (2)
Ѥƥʥɥ쥹˥Хɤ뤳ȤǤ롣
ǤʤϡåؤϼưŪ
.I net.ipv4.ip_local_port_range
ƤϰϤγǶƤʥݡȤơ
åȤ
.IR INADDR_ANY
˥Хɤ롣

ưϥѥåȤĤ֤ϤХåեѥåȤ
СΥѥåȤ礭Υǡ֤롣
դ˥Хåե礭ϥѥåȤϴݤ졢
.B MSG_TRUNC
ե饰åȤ롣
.I MSG_WAITALL
ϥݡȤƤʤ

IP ץϡ
.BR ip (7)
˵ҤƤ륽åȥץѤɤ߽񤭤Ǥ롣
Ŭڤ sysctl ͭʾ˸¤äƥͥˤäƽ
(̵ˤʤäƤǤ桼ˤϤ)
.BR ip (7)
򻲾ȤΤȡ

.B MSG_DONTROUTE
ե饰˥åȤƤˤϡ
Ԥ襢ɥ쥹ϥʥ󥿡եɥ쥹
ȤǤʤФʤʤѥåȤϤΥ󥿡եˤʤ

ѥåȤĹ󥿡ե MTU (Maximum Transmission Unit)
礭ȡUDP ϤΥѥåȤե饰Ȳ롣
ͥåȥȤɤˡϡ
.BR ip (7)

.B IP_PMTU_DISCOVER
ǵҤƤ
Path MTU Discovery
Ѥ뤳ȤǤ롣
.SH ɥ쥹Υեޥå
UDP  IPv4 
.B sockaddr_in
ɥ쥹եޥåȤѤ롣
.BR ip (7)
˵ҤƤ롣

.SH 顼
̿Ūʥ顼ϡȤåȤ³ƤʤƤ⡢
٤ƥ顼ͤȤƥ桼Ϥ롣
ˤϥͥåȥƱ顼ޤޤ롣
ƱåȤȤäΤΥѥåȤ˴ؤ륨顼뤫⤷ʤ
ο񤤤¾ BSD åȤμ¿Ȥϰۤʤ롣
ǤϥåȤ³Ƥʤϥ顼֤ʤ
Linux ο񤤤
.B RFC1122
Ǥλ˽äΤǤ롣

ŤɤȤθߴΤˡ
.B SO_BSDCOMPAT
SOL_SOCKET ץꤹСåȤ³Ƥ
˸¤äƥ⡼ȤΥ顼褦ˤǤ
.RB ( EPROTO "  " EMSGSIZE
)Υץͭˤϡ
ɤƥ顼褦ˤۤɤ
줿顼ϾϤ롣

.B IP_RECVERR
ץͭˤʤäƤȡ
٤ƤΥ顼ϥåȤΥ顼塼¸롣

.B MSG_ERRQUEUE
ե饰򥻥åȤ
.BR recvmsg (2)
Ƥ٤мǤ롣
.SH IOCTL
ʲ˼ ioctl 
.BR ioctl (2)
ȤäƥǤ롣
ʸˡϰʲ̤ꡣ
.PP
.RS
.nf
.BI int " value";
.IB error " = ioctl(" tcp_socket ", " ioctl_type ", &" value ");"
.fi
.RE
.TP
.B SIOCINQ
integer Υݥ󥿤ȤƼ롣
ԵƤǡΥХñ̤֤
ԵƤǡबʤ 0 ֤
.TP
.B SIOCOUTQ
塼ˤǡХñ̤֤
Linux 2.4 ʾǤΤбƤ롣
.PP
ˡ
.BR ip (7)

.BR socket (7)
ǽҤ٤ƤƤ ioctl бƤ롣
.SH 顼
.BR socket (7)

.BR ip (7)
˵ҤƤƤΥ顼
UDP åȤ֤ǽ롣
.\"NAKANO added TP..
.TP
.B ECONNREFUSED
Ԥ襢ɥ쥹˴ϢŤƤԤʤ
ϰΥѥåȤΥѥåȤ
ƤޤäƤ뤫Ǥ뤳Ȥ¿
.SH С
IP_RECVERR  Linux 2.2 οǽǤ롣
.SH 
 man ڡ Andi Kleen 񤤤
.SH Ϣ
.BR ip (7),
.BR socket (7),
.BR raw (7)

.BR RFC768 :
User Datagram Protocol
.br
.BR RFC1122 :
ۥȤɬ׾
.br
.BR RFC1191 :
path MTU discovery ε