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.\" Updated & Modified 1997-11-06, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated & Modified 1999-08-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated & Modified 2000-01-13, Kentaro Shirakata <argrath@yo.rim.or.jp>
.\" Updated & Modified 2005-02-23, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated & Modified 2005-10-05, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH CONNECT 2 2007-12-28 "Linux" "Linux Programmer's Manual"
.SH ̾
connect \- åȤ³Ԥ
.SH 
.nf
.BR "#include <sys/types.h>" "          /* ա׻ */"
.br
.B #include <sys/socket.h>
.sp
.BI "int connect(int " sockfd ", const struct sockaddr *" serv_addr ,
.BI "            socklen_t " addrlen );
.fi
.SH 
.BR connect ()
ƥॳϡեǥץ
.I sockfd
ȤƤ륽åȤ
.I serv_addr
ǻꤵ줿ɥ쥹³롣
.I addrlen

.I serv_addr
礭򼨤
.I serv_addr
Υɥ쥹ΥեޥåȤϥå
.I sockfd
Υɥ쥹֤ˤۤʤ롣
ʤܺ٤
.BR socket (2)
򻲾ȤΤȡ

å
.I sockfd

.B SOCK_DGRAM
ǤС
.I serv_addr
ϡǥեȤΥǡΥɥ쥹Ǥꡢ
ǡͣΥɥ쥹򼨤˲᤮ʤ
åȤ
.B SOCK_STREAM
⤷
.B SOCK_SEQPACKET
ǤСΥƥॳ
.I serv_addr
ǻꤵ줿ɥ쥹˷դ줿åȤФ³
ߤ롣
.PP
Ūˡ³ظ (connection-oriented) ץȥǤϰ٤
.BR connect ()
롣
³ (connectionless) ץȥǤбѹ뤿˲٤
.BR connect ()
ѤǤ롣
³åȤ
.I sockaddr

.I sa_family
Ф
.B AF_UNSPEC
ꤹ뤳Ȥǡ³ɥ쥹бä뤳ȤǤ
.RB ( AF_UNSPEC
ϥͥ 2.2 ʹߤ Linux ǥݡ)
.SH ֤
³ޤбŤȥ֤
Ԥ \-1 ֤
.I errno
Ŭڤͤꤹ롣
.SH 顼
ʲϰŪʥåȤˤĤƤΥ顼Ǥ롣¾˥ɥᥤͭΥ顼
ȯǽ롣
.TP
.B EACCES
Unix ɥᥤ󥽥åȤϥѥ̾Ǽ̤롣
åȡեؤν񤭹ߵĤʤäѥ̾
ãޤǤΥǥ쥯ȥΤ줫Ф븡Ĥʤä
.RB ( path_resolution (7)
⻲ȤΤ)
.TP
.B EACCES, EPERM
åȤΥ֥ɥ㥹ȡե饰ͭˤʤäƤʤΤ
桼֥ɥ㥹Ȥ³ߤޤϡΥե
§ˤ³׵᤬Ԥ
.TP
.B EADDRINUSE
륢ɥ쥹˻ѤƤ롣
.TP
.B EAFNOSUPPORT
Ϥ줿ɥ쥹
.I sa_family
եɤɥ쥹եߥ꡼ǤϤʤ
.TP
.B EAGAIN
ѲǽʥΥݡȤʤ
롼ƥ󥰥å˽ʬʥȥ꤬ʤ
.B PF_INET
ξˡɤäƥݡȤ䤹˴ؤƤ
.BR ip (7)

.I net.ipv4.ip_local_port_range
sysctl 򻲾ȤΤȡ
.TP
.B EALREADY
åȤ (non-blocking) ꤵƤꡢ
³λƤʤ
.TP
.B EBADF
եǥץǥץơ֥
ͭʥǥåǤϤʤ
.TP
.B ECONNREFUSED
⡼ȥɥ쥹³ԤäƤץबʤ
.TP
.B EFAULT
åȹ¤ΤΥɥ쥹桼Υɥ쥹ֳˤ롣
.TP
.B EINPROGRESS
åȤ (non-blocking) ꤵƤơ³򤹤
λ뤳ȤǤʤξ硢
.BR select (2)

.BR poll (2)
ȤäƤΥåȤ񤭹߲ǽˤʤΤԤĤȤǡ
³δλΤ뤳ȤǤ롣
.BR select (2)
ǽ񤭹߲ǽˤʤäˡ
.BR getsockopt (2)
Ȥä
.B SOL_SOCKET
٥
.B SO_ERROR
ץɤ߽Ф
Ȥˤꡢ
.BR connect ()
ԤȽǤǤ롣
ξ
.B SO_ERROR
 0 Ǥꡢ
Ԥξ
.B SO_ERROR
ΥꥹȤˤ뤤줫Υ顼ɤǤꡢ
ˤ꼺Ԥθʬ롣
.TP
.B EINTR
ª줿ʥˤꥷƥॳ뤬Ǥ줿
.\" TCP ξϡ³Ʊˤʤ뤬λ
.\" http://lkml.org/lkml/2005/7/12/254 򻲾ȤΤȡ
.TP
.B EISCONN
åȤϴ³ (connect) Ƥ롣
.TP
.B ENETUNREACH
ãǤʤͥåȥǤ롣
.TP
.B ENOTSOCK
եǥץåȤȴϢդƤʤ
.TP
.B ETIMEDOUT
³ߤƤǻڤ (timeout) ˤʤäСƤ
³ʤΤ⤷ʤ
IP åȤǤϡ syncookie СͭˤʤäƤ硢
ॢȤĹʤ礬Τդ뤳ȡ
.SH 
SVr4, 4.4BSD,
.RB ( connect ()
ؿ 4.2BSD Ǻǽо줷), POSIX.1-2001.
.\" SVr4 ǤϡŪʥ顼ɤȤ
.\" .BR EADDRNOTAVAIL ,
.\" .BR EINVAL ,
.\" .BR EAFNOSUPPORT ,
.\" .BR EALREADY ,
.\" .BR EINTR ,
.\" .BR EPROTOTYPE ,
.\" .B ENOSR
.\" ɲäƤ롣
.\" ޤܥޥ˥奢ˤϵܤƤʤɲäΥ顼郎¿ܤƤ롣
.SH 
POSIX.1-2001 Ǥ
.I <sys/types.h>
Υ󥯥롼ɤɬܤȤƤ餺
Linux ǤϤΥإåեɬפǤϤʤ
ŪˤϡĤμ (BSD ) ǤΥإåե뤬
ɬפǤꡢܿɬפʥץꥱǤϤΥե
󥯥롼ɤΤǤ

.BR connect ()
λܤΰ 4.x BSD  libc4, libc5 Ʊͤ˼ºݤˤ
.I int
Ǥ롣
POSIX Ǥ;ޤФƸߤ
.I socklen_t
ˤʤäƤꡢ
glibc Ǥ
.I socklen_t
ȤäƤ롣
.BR accept (2)
⻲ȤΤȡ
.SH 
.BR connect ()
㤬
.BR getaddrinfo (3)
˵ܤƤ롣
.SH Ϣ
.BR accept (2),
.BR bind (2),
.BR getsockname (2),
.BR listen (2),
.BR socket (2),
.BR path_resolution (7)