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-.\" Copyright (c) 1983, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)connect.2	8.1 (Berkeley) 6/4/93
-.\"
-.Dd August 18, 2016
-.Dt CONNECT 2
-.Os
-.Sh NAME
-.Nm connect
-.Nd initiate a connection on a socket
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/socket.h
-.Ft int
-.Fn connect "int s" "const struct sockaddr *name" "socklen_t namelen"
-.Sh DESCRIPTION
-The
-.Fa s
-argument
-is a socket.
-If it is of type
-.Dv 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
-.Dv SOCK_STREAM ,
-this call attempts to make a connection to
-another socket.
-The other socket is specified by
-.Fa name ,
-which is an address in the communications space of the socket.
-.Fa namelen
-indicates the amount of space pointed to by
-.Fa name ,
-in bytes; the
-.Fa sa_len
-member of
-.Fa name
-is ignored.
-Each communications space interprets the
-.Fa name
-argument in its own way.
-Generally, stream sockets may successfully
-.Fn connect
-only once; datagram sockets may use
-.Fn connect
-multiple times to change their association.
-Datagram sockets may dissolve the association
-by connecting to an invalid address, such as a null address.
-.Sh RETURN VALUES
-.Rv -std connect
-.Sh ERRORS
-The
-.Fn connect
-system call fails if:
-.Bl -tag -width Er
-.It Bq Er EBADF
-The
-.Fa s
-argument
-is not a valid descriptor.
-.It Bq Er EINVAL
-The
-.Fa namelen
-argument is not a valid length for the address family.
-.It Bq Er ENOTSOCK
-The
-.Fa s
-argument
-is a descriptor for a file, not a socket.
-.It Bq Er EADDRNOTAVAIL
-The specified address is not available on this machine.
-.It Bq Er EAFNOSUPPORT
-Addresses in the specified address family cannot be used with this socket.
-.It Bq Er EISCONN
-The socket is already connected.
-.It Bq Er ETIMEDOUT
-Connection establishment timed out without establishing a connection.
-.It Bq Er ECONNREFUSED
-The attempt to connect was forcefully rejected.
-.It Bq Er ECONNRESET
-The connection was reset by the remote host.
-.It Bq Er ENETUNREACH
-The network is not reachable from this host.
-.It Bq Er EHOSTUNREACH
-The remote host is not reachable from this host.
-.It Bq Er EADDRINUSE
-The address is already in use.
-.It Bq Er EFAULT
-The
-.Fa name
-argument specifies an area outside
-the process address space.
-.It Bq Er EINPROGRESS
-The socket is non-blocking
-and the connection cannot
-be completed immediately.
-It is possible to
-.Xr select 2
-for completion by selecting the socket for writing.
-.It Bq Er EINTR
-The connection attempt was interrupted by the delivery of a signal.
-The connection will be established in the background,
-as in the case of
-.Er EINPROGRESS .
-.It Bq Er EALREADY
-A previous connection attempt has not yet been completed.
-.It Bq Er EACCES
-An attempt is made to connect to a broadcast address (obtained through the
-.Dv INADDR_BROADCAST
-constant or the
-.Dv INADDR_NONE
-return value) through a socket that does not provide broadcast functionality.
-.It Bq Er EAGAIN
-An auto-assigned port number was requested but no auto-assigned ports
-are available.
-Increasing the port range specified by
-.Xr sysctl 3
-MIB variables
-.Va net.inet.ip.portrange.first
-and
-.Va net.inet.ip.portrange.last
-may alleviate the problem.
-.El
-.Pp
-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.
-.Bl -tag -width Er
-.It Bq Er ENOTDIR
-A component of the path prefix is not a directory.
-.It Bq Er ENAMETOOLONG
-A component of a pathname exceeded 255 characters,
-or an entire path name exceeded 1023 characters.
-.It Bq Er ENOENT
-The named socket does not exist.
-.It Bq Er EACCES
-Search permission is denied for a component of the path prefix.
-.It Bq Er EACCES
-Write access to the named socket is denied.
-.It Bq Er ELOOP
-Too many symbolic links were encountered in translating the pathname.
-.It Bq Er EPERM
-Write access to the named socket is denied.
-.El
-.Sh SEE ALSO
-.Xr accept 2 ,
-.Xr getpeername 2 ,
-.Xr getsockname 2 ,
-.Xr select 2 ,
-.Xr socket 2 ,
-.Xr sysctl 3 ,
-.Xr sysctl 8
-.Sh HISTORY
-The
-.Fn connect
-system call appeared in
-.Bx 4.2 .