📄 net-common-tcpip-manpages-connect.html
字号:
<!-- Copyright (C) 2003 Red Hat, Inc. --><!-- This material may be distributed only subject to the terms --><!-- and conditions set forth in the Open Publication License, v1.0 --><!-- or later (the latest version is presently available at --><!-- http://www.opencontent.org/openpub/). --><!-- Distribution of the work or derivative of the work in any --><!-- standard (paper) book form is prohibited unless prior --><!-- permission is obtained from the copyright holder. --><HTML><HEAD><TITLE>connect</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="TCP/IP Library Reference"HREF="tcpip-library-reference.html"><LINKREL="PREVIOUS"TITLE="bind"HREF="net-common-tcpip-manpages-bind.html"><LINKREL="NEXT"TITLE="getpeername"HREF="net-common-tcpip-manpages-getpeername.html"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-bind.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 38. TCP/IP Library Reference</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-getpeername.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="NET-COMMON-TCPIP-MANPAGES-CONNECT">connect</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">CONNECT(2) System Calls Manual CONNECT(2)NAME connect - initiate a connection on a socketSYNOPSIS #include <sys/types.h> #include <sys/socket.h> int connect(int s, const struct sockaddr *name, socklen_t namelen);DESCRIPTION The parameter s is a socket. If it is of type SOCK_DGRAM, this call specifies the peer with which the socket is to be associated; this address is that to which datagrams are to be sent, and the only address from which datagrams are to be received. If the socket is of type SOCK_STREAM, this call attempts to make a connection to another socket. The other socket is specified by name, which is an address in the commu- nications space of the socket. Each communications space interprets the name parameter in its own way. Generally, stream sockets may success- fully connect() only once; datagram sockets may use connect() multiple times to change their association. Datagram sockets may dissolve the association by connecting to an invalid address, such as a null address.RETURN VALUES If the connection or binding succeeds, 0 is returned. Otherwise a -1 is returned, and a more specific error code is stored in errno.ERRORS The connect() call fails if: [EBADF] S is not a valid descriptor. [ENOTSOCK] S is a descriptor for a file, not a socket. [EADDRNOTAVAIL] The specified address is not available on this machine. [EAFNOSUPPORT] Addresses in the specified address family cannot be used with this socket. [EISCONN] The socket is already connected. [ETIMEDOUT] Connection establishment timed out without establish- ing a connection. [EINVAL] A TCP connection with a local broadcast, the all-ones or a multicast address as the peer was attempted. [ECONNREFUSED] The attempt to connect was forcefully rejected. [EINTR] A connect was interrupted before it succeeded by the delivery of a signal. [ENETUNREACH] The network isn't reachable from this host. [EADDRINUSE] The address is already in use. [EFAULT] The name parameter specifies an area outside the pro- cess address space. [EINPROGRESS] The socket is non-blocking and the connection cannot be completed immediately. It is possible to select(2) or poll(2) for completion by selecting the socket for writing, and also use getsockopt(2) with SO_ERROR to check for error conditions. [EALREADY] The socket is non-blocking and a previous connection attempt has not yet been completed. The following errors are specific to connecting names in the UNIX domain. These errors may not apply in future versions of the UNIX IPC domain. [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac- ters, or an entire path name exceeded {PATH_MAX} char- acters. [ENOENT] The named socket does not exist. [EACCES] Search permission is denied for a component of the path prefix. [EACCES] Write access to the named socket is denied. [ELOOP] Too many symbolic links were encountered in translat- ing the pathname.SEE ALSO accept(2), getsockname(2), getsockopt(2), poll(2), select(2), socket(2)HISTORY The connect() function call appeared in 4.2BSD.BSD February 15, 1999 BSD </PRE></TD></TR></TABLE></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="net-common-tcpip-manpages-bind.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="net-common-tcpip-manpages-getpeername.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">bind</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="tcpip-library-reference.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">getpeername</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -