CONNECT(2)							System Calls Manual							CONNECT(2)

NAME

       connect - initiate a connection on a socket

SYNOPSIS

       #include <sys/types.h>
       #include <sys/socket.h>

       connect(s, name, namelen)
       int s;
       struct sockaddr *name;
       int namelen;

DESCRIPTION

       The  parameter  s  is  a socket.  If it is of type SOCK_DGRAM, then 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,  then  this  call  attempts  to make a connection to another socket.	The other socket is specified by name, which is an
       address in the communications space of the socket.  Each communications space interprets the name parameter in  its  own  way.	Generally,
       stream  sockets	may successfully 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 VALUE

       If the connection or binding succeeds, then 0 is returned.  Otherwise a -1 is returned, and a more specific error code is stored in errno.

ERRORS

       The 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 establishing a connection.

       [ECONNREFUSED]	   The attempt to connect was forcefully rejected.

       [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 process address space.

       [EINPROGRESS]	   The socket is non-blocking and the connection cannot be completed immediately.  It is possible to select(2) for comple-
			   tion by selecting the socket for writing.

       [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.

       [EINVAL]       The pathname contains a character with the high-order bit set.

       [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.

       [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 translating the pathname.

SEE ALSO

       accept(2), select(2), socket(2), getsockname(2)

4.2 Berkeley Distribution					   May 22, 1986 							CONNECT(2)